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A268 18Cr-2Mo

America ASTM A26818Cr-2Mo 一般设备用无缝和焊接铁素体与马氏体不锈钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A26818Cr-2Mo / A268 18Cr-2Mo
Category Grade Standard Region/Area Standard Content
Metals A268 18Cr-2Mo ASTM A268/A268M America 一般设备用无缝和焊接铁素体与马氏体不锈钢管

Chemical composition(mass fraction)(wt.%) of the A268 18Cr-2Mo

Element Min Max Similar
N - 0.0350 -
Mo 1.7500 2.5000 -
Ni - 1.0000 -
Cr 17.5000 19.5000 -
P - 0.0400 -
S - 0.0300 -
Mn - 1.0000 -
Si - 1.0000 -
C - 0.0250 -

Mechanical Properties of steel grade A268 18Cr-2Mo

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)
175 (≥) 313 (≥) 34 23 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 214

Physical Properties of steel grade A268 18Cr-2Mo

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
44 - -     0.11 -  
414 436 - 33.3 114   -  
433 - 21 34.2   433 411

Heat Treatment of steel grade A268 18Cr-2Mo

Heat treated : 1778°C - 1261°C

Technological Curves of steel grade A268 18Cr-2Mo

Cross Reference Table (Equivalent Grade) of A268 18Cr-2Mo

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