Volume 06 - Welding, Brazing and Soldering Part 7 pdf

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TABLE 1 RELATIONSHIP OF TEMPERATURE TO ELECTRICAL RESISTIVITY, THE PRODUCT OF
SPECIFIC HEAT AND MATERIAL DENSITY, AND THERMAL CONDUCTIVITY FOR SELECTED
MATERIALS
TEMPERATURE
°C °F
ELECTRICAL
RESISTIVITY (ρ),

10
-6
Ω· M
PRODUCT OF
SPECIFIC HEAT
AND MATERIAL DENSITY (Cγ),

10
6
W · S/M
3
· K
THERMAL CONDUCTIVITY (K),

W/M · K
MILD STEEL (0.23% C)

STAINLESS STEEL (19.11% CR, 8.14% NI, 0.60% W)
COPPER
ALUMINUM
γ γ
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γ ∆
=
(EQ 1)
∆ γ
TABLE 2 FREQUENCIES FOR THE THROUGH-HEATING OF NONFERROUS METAL ROUND BARS
BAR DIAMETER
mm in.
FREQUENCY, KHZ
δ
ρ
δ
πµ
=
(EQ 2)
ρ ρ
μ μ μ
μ
μ
μ

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