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AISI 8645 H

America AISI AISI8645H Hardenability bands for carbon and alloy H steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: AISI8645H / AISI 8645 H
Category Grade Standard Region/Area Standard Content
Metals AISI 8645 H SAE J 1268 America Hardenability bands for carbon and alloy H steels

Chemical composition(mass fraction)(wt.%) of the AISI 8645 H

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0400 -
P - 0.0300 -
Ni 0.3500 0.7500 -
Mo 0.1500 0.2500 -
Mn 0.7000 1.0500 -
Cu - 0.3500 -
Cr 0.3500 0.6500 -
C 0.4200 0.4900 -

Mechanical Properties of steel grade AISI 8645 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)
346 (≥) 984 (≥) 41 34 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical Properties of steel grade AISI 8645 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
43 - -     0.34 -  
245 934 - 33.3 131   -  
551 - 42 12.2   241 333

Heat Treatment of steel grade AISI 8645 H

Heat treated : 1973°C - 1726°C

Technological Curves of steel grade AISI 8645 H

Cross Reference Table (Equivalent Grade) of AISI 8645 H

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