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A240 Type 321H

America ASTM A240Type321H 压力容器用耐热铬及铬镍不锈钢板、薄板及带材 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A240Type321H / A240 Type 321H
Category Grade Standard Region/Area Standard Content
Metals A240 Type 321H ASTM A240/A240M America 压力容器用耐热铬及铬镍不锈钢板、薄板及带材

Chemical composition(mass fraction)(wt.%) of the A240 Type 321H

Element Min Max Similar
Ti - 0.7000 -
Si - 0.7500 -
S - 0.0300 -
P - 0.0450 -
Ni 9.0000 12.0000 -
Mn - 2.0000 -
Cr 17.0000 19.0000 -
C 0.0400 0.1000 -

Mechanical Properties of steel grade A240 Type 321H

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)
629 (≥) 245 (≥) 11 41 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical Properties of steel grade A240 Type 321H

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
23 - -     0.32 -  
969 143 - 44.3 213   -  
989 - 14 31.2   234 241

Heat Treatment of steel grade A240 Type 321H

Heat treated : 1249°C - 1964°C

Technological Curves of steel grade A240 Type 321H

Cross Reference Table (Equivalent Grade) of A240 Type 321H

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