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A729 Class H

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America ASTM A729ClassH 货物运输及电气铁路用热处理合金钢轴 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A729ClassH / A729 Class H
Category Grade Standard Region/Area Standard Content
Metals A729 Class H ASTM A729/A729M America 货物运输及电气铁路用热处理合金钢轴

Chemical composition(mass fraction)(wt.%) of the A729 Class H

Element Min Max Similar
Si 0.1500 - -
S - 0.0400 -
P - 0.0350 -
Other - - -
Mn 0.6000 0.9000 -

Mechanical Properties of steel grade A729 Class 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)
698 (≥) 494 (≥) 11 12 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 121

Physical Properties of steel grade A729 Class 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
34 - -     0.14 -  
381 634 - 44.3 244   -  
496 - 31 43.2   321 331

Heat Treatment of steel grade A729 Class H

Heat treated : 1358°C - 1191°C

Technological Curves of steel grade A729 Class H

Cross Reference Table (Equivalent Grade) of A729 Class H

Grade Standard Country Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1
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