Bsi bs en 01515 2 2001 (2002)

BRITISH STANDARD

Flanges and their
joints — Bolting —
Part 2: Classification of bolt materials
for steel flanges, PN designated

The European Standard EN 1515-2:2001 has the status of a
British Standard

ICS 21.060.01; 23.040.60

12&23<,1*:,7+287%6,3(50,66,21(;&(37$63(50,77('%<&23<5,*+7/$:

BS EN
1515-2:2001


BS EN 1515-2:2001

National foreword
This British Standard is the official English language version of
EN 1515-2:2001.
The UK participation in its preparation was entrusted to Technical Committee
PSE/15, Flanges, which has the responsibility to:
—

aid enquirers to understand the text;

—

present to the responsible international/European committee any
enquiries on the interpretation, or proposals for change, and keep the
UK interests informed;

—

monitor related international and European developments and
promulgate them in the UK.

A list of organizations represented on this committee can be obtained on
request to its secretary.
Cross-references
The British Standards which implement international or European
publications referred to in this document may be found in the BSI Catalogue
under the section entitled “International Standards Correspondence Index”, or
by using the “Search” facility of the BSI Electronic Catalogue or of British
Standards Online.
This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for its correct application.
Compliance with a British Standard does not of itself confer immunity
from legal obligations.

This British Standard, having
been prepared under the
direction of the Engineering
Sector Policy and Strategy
Committee, was published
under the authority of the
Standards Policy and Strategy
Committee on 23 July 2002

Summary of pages
This document comprises a front cover, an inside front cover, the EN title page,
pages 2 to 19 and a back cover.
The BSI copyright date displayed in this document indicates when the
document was last issued.

Amendments issued since publication
Amd. No.
© BSI 23 July 2002

ISBN 0 580 40143 X

Date

Comments


EUROPEAN STANDARD

EN 1515-2

NORME EUROPÉENNE
EUROPÄISCHE NORM

December 2001

ICS 21.060.01; 23.040.60

English version

Flanges and their joints - Bolting - Part 2: Classification of bolt
materials for steel flanges, PN designated
Brides et leurs assemblages - Boulonnerie - Partie 2:
Classification de matériaux de boulonnerie pour brides en
acier, désignées PN

Flansche und ihre Verbindungen - Schrauben und Muttern Teil 2: Klassifizierung von Schraubenwerkstoffen für
Stahlflansche, nach PN bezeichnet

This European Standard was approved by CEN on 20 October 2001.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36

© 2001 CEN

All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.

B-1050 Brussels

Ref. No. EN 1515-2:2001 E


EN 1515-2:2001 (E)

Contents
page
Foreword.................................................................................................................................................. 2
1
Scope
.............................................................................................................. 2
2
Normative references
.............................................................................................................. 2
3
Combination of materials .............................................................................................................. 3
4
Classification of bolt materials....................................................................................................... 3
_
Table 1 Classification of bolt materials.................................................................................................. 4
Annex A (informative) Basic information ............................................................................................ 17
Annex ZA (informative) Relationship with EU Directive(s) ................................................................. 19

Foreword
This European Standard has been prepared by Technical Committee CEN/TC 74 "Flanges and their joints", the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical text

or by endorsement, at the latest by June 2002, and conflicting national standards shall be withdrawn at the
latest by June 2002.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
EN 1515 consists of two Parts:
Part 1: Selection of bolting;
Part 2: Classification of bolt materials for steel flanges, PN designated.
The annexes A and ZA are informative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,
Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.

1

Scope

This European Standard covers the classification of bolt materials combination with the flange material groups
of steel flanges prEN 1092-1 (PN-designated).
Bolt materials are listed in EN 1515-1, flange material groups are listed in prEN 1092-1.

2

Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text’ and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard, only when incorporated in it by amendment or revision. For undated references the latest edition of

the publication referred to applies (including amendments).
prEN 1092-1, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories,
PN designated – Part 1: Steel flanges.
2


EN 1515-2:2001 (E)

EN 1515-1, Flanges and their joints - Bolting - Part 1: Selection of bolting.
EN 10269, Steels and nickel alloys for fasteners for use at elevated and/or low temperature properties.
EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws
and studs (ISO 898-1:1999).
EN ISO 3506-1, Mechanical properties of corrosion-resistant stainless steel fasteners – Part 1: Bolts, screws
and studs (ISO 3506-1:1997).

3

Combination of materials

Bolt materials can be combined with flange material groups as given in Table 1. This table is valid for all flanges
for which pressure temperature (p/T) ratings are given in prEN 1092-1. For flanges which have no p/T ratings
(e.g. DN 700 and above), the tables may be used as a guide.
All bolt materials can be used in the range of the p/T ratings given for the flanges. Restrictions due to the
classification shall be observed (see clause 4).
WARNING Bold materials 4.6 and 6.8 are not intended for the use in the scope of the Pressure Equipment Directive.

4

Classification of bolt materials

The classification of bolt materials as given in Table 1 is based on the comparison of the strengths of the flange
material and the bolt material. The strength ratio r of the flange/bolt combination chosen is compared with the
strength ratio of the flange bolt combination used for the standard flange calculation (see annex A).
For each flange material group the classification is done in three strength levels:



Low strength: The strength ratio of the chosen flange/bolt combination is less than that used in the
standard flange calculation.
These bolts may be used for less severe service, e.g. for water service or in case of oversized flanged
joints. For definition of these service conditions, special experience is necessary otherwise a recalculation of
the flanged joint shall be done.




Normal strength: The strength ratio of the chosen flange/bolt combination is similar (within defined limits)
to that used in the standard flange calculation.
These bolts may be used for all service in the range of the P/T-ratings unless there are other restrictions to
the contrary.




High strength: The strength ratio of the chosen flange/bolt combination is much more higher than that used
in the standard flange calculation.
These bolts may be used in the same range like normal strength level bolting. During assembly however,
care should be taken not to overstress the flanges (e. g. by means of torque control).

3


EN 1515-2:2001 (E)

Table 1
Flange materials prEN
1092-1
Group
Type
1E0
CS

_

Classification of bolt materials
Bolt materials EN 1515-1

Material/property class
4.6
A4-50, A2-50
X5CrNiMo17-12-2 AT
X5CrNi18-10
5.6
6.8
25CrMo4
21CrMoV5-7
X7CrNiMoBNb16-16
A4-70, A2-70

3E0

4

CS high temp.

X5CrNiMo17-12-2
AT+C
X5CrNi18-10 AT+C
8.8
42CrMo4
30CrNiMo8
42CrMo5-6
40CrMoV4-6
20CrMoVTiB4-10
X6NiCrTiMoVB 25-15-2
4.6
A4-50,A2-50

Standard
EN ISO 898-1
EN ISO
3506-1
EN 10269
EN 10269
EN ISO 898-1
EN ISO 898-1
EN 10269
EN 10269
EN 10269
EN ISO
3506-1
EN 10269

EN 10269
EN ISO 898-1
EN 10269
EN 10269
EN 10269
EN 10269
EN 10269
EN 10269
EN ISO 898-1
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
5.6
EN ISO 898-1
6.8
EN ISO 898-1
25CrMo4
EN 10269
21CrMoV5-7
EN 10269
X6NiCrTiMoVB 25-15-2 EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2

EN 10269
AT+C
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO 898-1
42CrMo4
EN 10269
30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
20CrMoVTiB4-10
EN 10269
continued

Classification
Dia.
All
<=39

Line No.
01
16, 18

<=160
<=160
All

All
<=100
<=160
<=160
<=24

20
22
02
03
05, 07
12
15
17, 19

<=160

21

<=160
All
<=60
<=100
<=100
<=100
<=160
<=160
All
<=39

23
04
06, 08
09
10
11
13
14
01
16, 18

<=160
<=160
All
All
<=100
<=160
<=160
<=160
<=24

20
22
02
03
05, 07
12
14
15
17, 19

<=160

21

<=160
All
<=60
<=100
<=100
<=100
<=160

23
04
06, 08
09
10
11
13

Strength
Low

Normal

High

Low

Normal

High


EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN
1092-1
Group
Type
3E1
CS high temp.

4E0

0,5 Mo

Bolt materials EN 1515-1
Material/property class
4.6

Standard
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50

EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO
898-1
25CrMo4
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
42CrMo4
EN 10269

30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
4.6
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO
898-1
25CrMo4
EN 10269
21CrMoV5-7
EN 10269
X6NiCrTiMoVB 25-15-2

EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
42CrMo4
EN 10269
30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
20CrMoVTiB4-10
EN 10269
continued

Classification
Dia.
All

Line No.
01

All

02

<=39

16, 18

<=160
<=160
All

20
22
03

All

04

<=100
<=160
<=160
<=160
<=160
<=24

05, 07
12
13
14
15

17, 19

<=160
<=160
<=60
<=100
<=100
<=100
All

21
23
06, 08
09
10
11
01

All

02

<=39

16, 18

<=160
<=160
All

20
22
03

All

04

<=100
<=160
<=160
<=160
<=24

05, 07
12
14
15
17, 19

<=160
<=160
<=60
<=100
<=100
<=100
<=160

21
23

06, 08
09
10
11
13

Strength

Low

Normal

High

Low

Normal

High

5


EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN
1092-1
Group
Type

5E0
1Cr-0,5Mo

6E0

6

2Cr-1Mo

Bolt materials EN 1515-1
Material/property class
4.6

Standard
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
6.8
EN ISO
898-1
8.8

EN ISO
898-1
25CrMo4
EN 10269
42CrMo4
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
30CrNiMo8
EN 10269
4.6
EN ISO
898-1
5.6

EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO
898-1
25CrMo4
EN 10269
42CrMo4
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16

EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
30CrNiMo8
EN 10269
continued

Classification
Dia.
All

Line No.
01

All

02

<=39

16, 18

<=160
<=160
All

20
22
03

All

04

<=100
<=60
<=100
<=100
<=160
<=160
<=160
<=160
<=24

05, 07
06, 08
10
11
12
13
14
15
17, 19

<=160
<=160

<=100
All

21
23
09
01

All

02

<=39

16, 18

<=160
<=160
All

20
22
03

All

04

<=100
<=60

<=100
<=100
<=160
<=160
<=160
<=160
<=24

05, 07
06, 08
10
11
12
13
14
15
17, 19

<=160
<=160
<=100

21
23
09

Strength

Low

Normal

High

Low

Normal

High


EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN
1092-1
Group
Type
6E1
5Cr-1Mo

7E0

CS low temp.

Bolt materials EN 1515-1
Material/property class
4.6

Standard

EN ISO
898-1
5.6
EN ISO
898-1
6.8
EN ISO
898-1
25CrMo4
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-50,A2-50
EN ISO
3506-1
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10
EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO
898-1
42CrMo4
EN 10269

30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
4.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
5.6
EN ISO
898-1
6.8
EN ISO
898-1
25CrMo4
EN 10269

21CrMoV5-7
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO 8981
42CrMo4
EN 10269
30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
20CrMoVTiB4-10
EN 10269
continued

Classification
Dia.
All

Line No.
01

All

02

All

03

<=100
<=160
<=39

05, 07
15
16, 18

<=24

17, 19

<=160
<=160
<=160
<=160
All

20

21
22
23
04

<=60
<=100
<=100
<=100
<=160
<=160
<=160
All

06, 08
09
10
11
12
13
14
01

<=39

16, 18

<=160
<=160
All

20
22
02

All

03

<=100
<=160
<=160
<=160
<=24

05, 07
12
14
15
17, 19

<=160
<=160
All

21
23
04

<=60

<=100
<=100
<=100
<=160

06, 08
09
10
11
13

Strength

Low

Normal

Low

Normal

High

7


EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN

1092-1
Group
Type
7E1
CS low temp.

7E2

8

9Ni

Bolt materials EN 1515-1
Material/property class
4.6

Standard
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10
EN 10269

X5CrNi18-10 AT+C
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO
898-1
25CrMo4
EN 10269
42CrMo4
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
30CrNiMo8
EN 10269
4.6

EN ISO
898-1
5.6
EN ISO
898-1
6.8
EN ISO
898-1
25CrMo4
EN 10269
21CrMoV5-7
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-50,A2-50
EN ISO
3506-1
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10
EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO
898-1

42CrMo4
EN 10269
30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
continued

Classification
Dia.
All

Line No.
01

All

02

<=39

16, 18

<=160

<=160
<=160
<=160
All

20
21
22
23
03

All

04

<=100
<=60
<=100
<=100
<=160
<=160
<=160
<=160
<=24

05, 07
06, 08
10
11
12

13
14
15
17, 19

<=100
All

09
01

All

02

All

03

<=100
<=160
<=160
<=39

05, 07
12
15
16, 18

<=24

17, 19

<=160
<=160
<=160
<=160
All

20
21
22
23
04

<=60
<=100
<=100
<=100
<=160
<=160

06, 08
09
10
11
13
14

Strength

Low

Normal

High

Low

Normal


EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN
1092-1
Group
Type
7E3
1,4Mn-0,5Ni

8E0

CS fine grain

Bolt materials EN 1515-1
Material/property class
4.6

Standard
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO
898-1
25CrMo4
EN 10269
42CrMo4
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10

EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
30CrNiMo8
EN 10269
4.6
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
6.8
EN ISO
898-1
8.8

EN ISO
898-1
25CrMo4
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
42CrMo4
EN 10269
30CrNiMo8
EN 10269
continued

Classification
Dia.

All

Line No.
01

All

02

<=39

16, 18

<=160
<=160
All

20
22
03

All

04

<=100
<=60
<=100
<=100
<=160

<=160
<=160
<=160
<=24

05, 07
06, 08
10
11
12
13
14
15
17, 19

<=160
<=160
<=100
All

21
23
09
01

All

02

<=39

16, 18

<=160
<=160
All

20
22
03

All

04

<=100
<=100
<=100
<=160
<=160
<=160
<=160
<=24

05, 07
10
11
12
13
14

15
17, 19

<=160
<=160
<=60
<=100

21
23
06, 08
09

Strength

Low

Normal

High

Low

Normal

High

9

EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN
1092-1
Group
Type
8E1
CS fine grain

8E2

10

CS fine grain

Bolt materials EN 1515-1
Material/property class
4.6

Standard
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT

EN 10269
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10
EN 10269
X5CrNi18-10 AT+C
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO
898-1
25CrMo4
EN 10269
42CrMo4
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO

3506-1
30CrNiMo8
EN 10269
4.6
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO
898-1
25CrMo4
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269

20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
42CrMo4
EN 10269
30CrNiMo8
EN 10269
continued

Classification
Dia.
All

Line No.
01

All

02

<=39

16, 18

<=160
<=160
<=160
<=160
All

20
21
22
23
03

All

04

<=100
<=60
<=100
<=100
<=160
<=160
<=160
<=160
<=24

05, 07

06, 08
10
11
12
13
14
15
17, 19

<=100
All

09
01

All

02

<=39

16, 18

<=160
<=160
All

20
22
03

All

04

<=100
<=100
<=100
<=160
<=160
<=160
<=160
<=24

05, 07
10
11
12
13
14
15
17, 19

<=160
<=160
<=60
<=100

21
23

06, 08
09

Strength

Low

Normal

High

Low

Normal

High


EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN
1092-1
Group
Type
8E3
CS fine grain

9E0

11CR-1Mo-V

Bolt materials EN 1515-1
Material/property class
4.6

Standard
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10
EN 10269
X5CrNi18-10 AT+C
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO
898-1
25CrMo4
EN 10269

42CrMo4
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
30CrNiMo8
EN 10269
4.6
EN ISO
898-1
5.6
EN ISO
898-1
6.8
EN ISO
898-1
25CrMo4
EN 10269

21CrMoV5-7
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-50,A2-50
EN ISO
3506-1
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10
EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO
898-1
42CrMo4
EN 10269
30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269

20CrMoVTiB4-10
EN 10269
continued

Classification
Dia.
All

Line No.
01

All

02

<=39

16,18

<=160
<=160
<=160
<=160
All

20
21
22
23
03

All

04

<=100
<=60
<=100
<=100
<=160
<=160
<=160
<=160
<=24

05, 07
06, 08
10
11
12
13
14
15
17, 19

<=100
All

09
01

All

02

All

03

<=100
<=160
<=160
<=160
<=39

05, 07
12
14
15
16, 18

<=24

17, 19

<=160
<=160
<=160
<=160
All

20
21
22
23
04

<=60
<=100
<=100
<=100
<=160

06, 08
09
10
11
13

Strength

Low

Normal

High

Low

Normal

11


EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN
1092-1
Group
Type
10E0
19Cr-10Ni

10E1

12

18Cr-10Ni-N

Bolt materials EN 1515-1
Material/property class
4.6

Standard
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1

X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
5.6
EN ISO
898-1
6.8
EN ISO
898-1
25CrMo4
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO
898-1
42CrMo4
EN 10269
30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6

EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
4.6
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO
898-1
25CrMo4
EN 10269
42CrMo5-6
EN 10269

40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
42CrMo4
EN 10269
30CrNiMo8
EN 10269
continued

Classification
Dia.
All

Line No.
01

Strength

<=39

16, 18

Low

<=160
<=160
All

20
22
02

All

03

<=100
<=160
<=24

05, 07
15
17, 19

<=160
<=160
All

21
23
04

<=60
<=100
<=100
<=100
<=160
<=160
<=160
All

06, 08
09
10
11
12
13
14
01

All

02

<=39

16, 18

<=160
<=160
All

20
22
03

All

04

<=100
<=100
<=100
<=160
<=160
<=160
<=160
<=24

05, 07
10
11
12
13
14
15
17, 19

<=160
<=160
<=60
<=100

21
23
06, 08
09

Normal

High

Low

Normal

High


EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN
1092-1
Group
Type
11E0

18Cr-10Ni

12E0

18Cr-10Ni-Ti

Bolt materials EN 1515-1
Material/property class
4.6

Standard
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
5.6
EN ISO
898-1
6.8
EN ISO
898-1
25CrMo4
EN 10269
X7CrNiMoBNb16-16
EN 10269

A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO
898-1
42CrMo4
EN 10269
30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
4.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT

EN 10269
X5CrNi18-10
EN 10269
5.6
EN ISO
898-1
6.8
EN ISO 8981
25CrMo4
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO
898-1
42CrMo4
EN 10269
30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7

EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
continued

Classification
Dia.
All

Line No.
01

Strength

<=39

16, 18

Low

<=160
<=160
All

20
22
02

All

03

<=100
<=160
<=24

05, 07
15
17, 19

<=160
<=160
All

21
23
04

<=60
<=100
<=100
<=100
<=160
<=160
<=160
All

06, 08

09
10
11
12
13
14
01

<=39

16, 18

<=160
<=160
All

20
22
02

All

03

<=100
<=160
<=24

05, 07
15

17, 19

<=160
<=160
All

21
23
04

<=60
<=100
<=100
<=100
<=160
<=160
<=160

06, 08
09
10
11
12
13
14

Normal

High

Low

Normal

High

13


EN 1515-2:2001 (E)

Table 1 (continued)
Flange materials prEN
1092-1
Group
Type
13E0
17Cr-12Ni-2Mo

13E1

14

17Cr-11Ni-2Mo-N

Bolt materials EN 1515-1
Material/property class
A4-50,A2-50

Standard

EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
4.6
EN ISO
898-1
5.6
EN ISO
898-1
6.8
EN ISO
898-1
25CrMo4
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO
898-1
42CrMo4
EN 10269

30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
4.6
EN ISO
898-1
5.6
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
6.8
EN ISO
898-1
8.8
EN ISO

898-1
25CrMo4
EN 10269
42CrMo4
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
30CrNiMo8
EN 10269
continued

Classification
Dia.
<=39

Line No.
16, 18

Strength

<=160
<=160
All

20
22
01

Low

All

02

All

03

<=100
<=160
<=24

05, 07
15

17, 19

<=160
<=160
All

21
23
04

<=60
<=100
<=100
<=100
<=160
<=160
<=160
All

06, 08
09
10
11
12
13
14
01

All

02

<=39

16, 18

<=160
<=160
All

20
22
03

All

04

<=100
<=60
<=100
<=100
<=160
<=160
<=160
<=160
<=24

05, 07
06, 08

10
11
12
13
14
15
17, 19

<=160
<=160
<=100

21
23
09

Normal

High

Low

Normal

High


EN 1515-2:2001 (E)

Table 1 (continued)

Flange materials prEN
1092-1
Group
Type
14E0
17Cr-12Ni-2Mo

15E0

17Cr-12Ni-2Mo

Bolt materials EN 1515-1
Material/property class
4.6

Standard
EN ISO
898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
5.6
EN ISO
898-1
6.8
EN ISO

898-1
25CrMo4
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO
898-1
42CrMo4
EN 10269
30CrNiMo8
EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
4.6
EN ISO

898-1
A4-50,A2-50
EN ISO
3506-1
X5CrNiMo17-12-2 AT
EN 10269
X5CrNi18-10
EN 10269
5.6
EN ISO
898-1
6.8
EN ISO
898-1
25CrMo4
EN 10269
X7CrNiMoBNb16-16
EN 10269
A4-70, A2-70
EN ISO
3506-1
X5CrNiMo17-12-2 AT+C EN 10269
X5CrNi18-10 AT+C
EN 10269
8.8
EN ISO
898-1
42CrMo4
EN 10269
30CrNiMo8

EN 10269
42CrMo5-6
EN 10269
40CrMoV4-6
EN 10269
21CrMoV5-7
EN 10269
20CrMoVTiB4-10
EN 10269
X6NiCrTiMoVB 25-15-2
EN 10269
continued

Classification
Dia.
All

Line No.
01

Strength

<=39

16, 18

Low

<=160
<=160

All

20
22
02

All

03

<=100
<=160
<=24

05, 07
15
17, 19

<=160
<=160
All

21
23
04

<=60
<=100
<=100
<=100

<=160
<=160
<=160
All

06, 08
09
10
11
12
13
14
01

<=39

16, 18

<=160
<=160
All

20
22
02

All

03

<=100
<=160
<=24

05, 07
15
17, 19

<=160
<=160
All

21
23
04

<=60
<=100
<=100
<=100
<=160
<=160
<=160

06, 08
09
10
11
12
13

14

Normal

High

Low

Normal

High

15


EN 1515-2:2001 (E)

Table 1 (concluded)
Flange materials prEN
1092-1
Group
Type
16E0
25Cr-6Ni-3Cu-N

Bolt materials EN 1515-1
Material/property class
4.6
5.6
6.8

25CrMo4
21CrMoV5-7
X7CrNiMoBNb16-16
A4-50,A2-50
A4-70, A2-70
X5CrNiMo17-12-2 AT
X5CrNiMo17-12-2 AT+C
X5CrNi18-10
X5CrNi18-10 AT+C
8.8
42CrMo4
30CrNiMo8
42CrMo5-6
40CrMoV4-6
20CrMoVTiB4-10
X6NiCrTiMoVB 25-15-2

16

Standard
EN ISO
898-1
EN ISO
898-1
EN ISO
898-1
EN 10269
EN 10269
EN 10269
EN ISO

3506-1
EN ISO
3506-1
EN 10269
EN 10269
EN 10269
EN 10269
EN ISO
898-1
EN 10269
EN 10269
EN 10269
EN 10269
EN 10269
EN 10269

Classification
Dia.
All

Line No.
01

All

02

All

03

<=100
<=160
<=160
<=39

05, 07
12
15
16, 18

<=24

17, 19

<=160
<=160
<=160
<=160
All

20
21
22
23
04

<=60
<=100
<=100

<=100
<=160
<=160

06, 08
09
10
11
13
14

Strength

Low

Normal


EN 1515-2:2001 (E)

Annex A
(informative)
Basic information
This annex describes the rules under which the tables of this standard have been developed.

A.1 Definitions



Flange calculation model: PN designated steel flanges, for which p/t ratings are given (see prEN 1092-1)
have been calculated at ambient temperature with a flange material yield stress of 225 N/mm² and a bolt

material yield stress of 300 N/mm². This is the calculation model for the flanges.




Classification: Bolt materials are set in relation to flange material groups and classified on the basis of their
strength. Starting from the flange calculation model classification of the bolt material is done as given in this
annex A. (See also prEN 1092-1 annex F: Determination of p/T ratings for flanges using EN materials.)




r: stress ratio for classification of the bolt material (see also clause 4)




r min: minimum value of all stress ratios of one flange material to one bolt material calculated over all
temperatures.




r 20: stress ratio at 20 °C of one flange material to one bolt material.

A.2 Combination of flange and bolt materials
From each flange material group (e.g. group 3E0) the material with the lowest stress at 20 °C has been selected
for the calculations of this group (Cast stainless steel has not been used, as the stress values are too low). The
p/T ratings of the flanges itself has been calculated with the lowest value of a material group.
This material is combined with each bolt material given in EN 1515-1 and the stress ratio r is calculated for all
temperatures.
The results are evaluated for the classification of the bolt material.

A.3 Calculation

Calculation method of Stress Ratio r:
gm = Smf / Smb = 225 / 300

g
gm
Smf
Smb
STf
STb
r

=
=
=
=
=
=
=

g

= STf / STb

r

= gm / g

= [225 / 300] / [STf / STb]

Stress ratio for a flange/bolt combination at temperature

Stress ratio for calculation model
Flange material stress for flange calculation model at 20 °C (= 225 N/mm²)
Bolt material stress for calculation model at 20 °C (= 300 N/mm²)
Flange material stress at temperature (N/mm²)
Bolt material stress at temperature (N/mm²)
Stress ratio model/combination

17


EN 1515-2:2001 (E)

A.4 Classification
The bolt materials combined with a flange material group are classified in low – normal – high strength (see also
clause 4).
The minimum value of r (r min) and the value at 20 °C (r 20) of one flange material to one bolt material
calculated over all temperatures is used for the classification (e.g. flange material group 3E0 compared with bolt
material 5.6 and temperatures from 20 °C to 300 °C).
Stress ratio r below 1 means:
Stress ratio r above 1 means:

Bolts are weaker than calculation model
Bolts are stronger than calculation model

Classification has been done according to the following criteria:







18

Low strength:
Normal strength:
High strength:

for bolt materials with r min  0,9;
for bolt materials with r min  0,9 & r 20 < 2;
for bolt materials with r 20  2.