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SA-250 Grade T 1a

America ASME SA-250GradeT1a 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: SA-250GradeT1a / SA-250 Grade T 1a
Category Grade Standard Region/Area Standard Content
Metals SA-250 Grade T 1a ASME SA-250/SA-250M 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 SA-250 Grade T 1a

Element Min Max Similar
Si 0.1000 0.5000 -
S - 0.0250 -
P - 0.0250 -
Mo 0.4400 0.6500 -
Mn 0.3000 0.8000 -
C 0.1500 0.2500 -

Mechanical Properties of steel grade SA-250 Grade T 1a

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)
945 (≥) 693 (≥) 42 13 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 323

Physical Properties of steel grade SA-250 Grade T 1a

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
14 - -     0.11 -  
997 613 - 23.3 443   -  
553 - 33 11.2   144 122

Heat Treatment of steel grade SA-250 Grade T 1a

Heat treated : 1963°C - 1295°C

Technological Curves of steel grade SA-250 Grade T 1a

Cross Reference Table (Equivalent Grade) of SA-250 Grade T 1a

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