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B 275 GR20A

Description

USA SAE B 275 (2005), B 275 GR20A Specialsteel Standard Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: B 275 GR20A
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel B 275 GR20A Precipitation-Hardening SAE USA Standard Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought

Chemical composition(mass fraction)(wt.%) of the B 275 GR20A

C Si Mn Cr Ni Mo Co W Al Cu Ti Fe Nb
≤0.12 ≤0.30 ≤0.80 ≤19.00 ≤14.00 ≤ ≥ ≤ ≥ ≤ ≥ ≤ ≥ ≤ ≥ ≤ ≥ ≤remaining ≤1.60

Mechanical Properties of steel grade B 275 GR20A

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)
716 (≥) 279 (≥) 22 14 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 231

Physical Properties of steel grade B 275 GR20A

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
34 - -     0.24 -  
543 535 - 33.3 124   -  
723 - 32 43.2   244 244

Heat Treatment of steel grade B 275 GR20A

Heat treated : 1421°C - 1362°C

Technological Curves of steel grade B 275 GR20A

Cross Reference Table (Equivalent Grade) of B 275 GR20A

Relevant standard of B 275 GR20A

B 275 (2005) Standard Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought B-275-(2005).pdf

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