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A250 Grade T22

America ASTM A250GradeT22 锅炉和过热器管用电通电阻焊接铁素体合金钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A250GradeT22 / A250 Grade T22
Category Grade Standard Region/Area Standard Content
Metals A250 Grade T22 ASTM A250/A250M America 锅炉和过热器管用电通电阻焊接铁素体合金钢

Chemical composition(mass fraction)(wt.%) of the A250 Grade T22

Element Min Max Similar
Si - 0.5000 -
S - 0.0200 -
P - 0.0250 -
Mo 0.8700 1.1300 -
Mn 0.3000 0.6000 -
Cr 1.9000 2.6000 -
C - 0.1500 -

Mechanical Properties of steel grade A250 Grade T22

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)
777 (≥) 655 (≥) 21 33 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical Properties of steel grade A250 Grade T22

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 - -     0.34 -  
672 927 - 34.3 134   -  
678 - 14 13.2   312 223

Heat Treatment of steel grade A250 Grade T22

Heat treated : 1226°C - 1651°C

Technological Curves of steel grade A250 Grade T22

Cross Reference Table (Equivalent Grade) of A250 Grade T22

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