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America SAE 8642H Hardenability bands for carbon and alloy H steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 8642H / 8642 H
Category Grade Standard Region/Area Standard Content
Metals 8642 H SAE J 1268 America Hardenability bands for carbon and alloy H steels

Chemical composition(mass fraction)(wt.%) of the 8642 H

Element Min Max Similar

Mechanical Properties of steel grade 8642 H

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
181 (≥) 355 (≥) 22 24 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 242

Physical Properties of steel grade 8642 H

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
13 - -     0.12 -  
757 269 - 11.3 133   -  
641 - 22 32.2   243 142

Heat Treatment of steel grade 8642 H

Heat treated : 1354°C - 1781°C

Technological Curves of steel grade 8642 H

Cross Reference Table (Equivalent Grade) of 8642 H

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