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America ASTM A240255 压力容器与普通设备用铬和铬镍不锈钢厚板及带材规格 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A240255 / A240 255
Category Grade Standard Region/Area Standard Content
Metals A240 255 ASTM A240/A240M America 压力容器与普通设备用铬和铬镍不锈钢厚板及带材规格

Chemical composition(mass fraction)(wt.%) of the A240 255

Element Min Max Similar
N 0.1000 0.2500 -
Cu 1.5000 2.5000 -
Mo 2.9000 3.9000 -
Ni 4.5000 6.5000 -
Cr 24.0000 27.0000 -
P - 0.0400 -
S - 0.0300 -
Mn - 1.5000 -
Si - 1.0000 -
C - 0.0400 -

Mechanical Properties of steel grade A240 255

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)
327 (≥) 562 (≥) 24 12 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 424

Physical Properties of steel grade A240 255

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
42 - -     0.22 -  
744 861 - 44.3 232   -  
992 - 12 33.2   321 341

Heat Treatment of steel grade A240 255

Heat treated : 1252°C - 1112°C

Technological Curves of steel grade A240 255

Cross Reference Table (Equivalent Grade) of A240 255

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