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B 275 GR20B

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B 275 GR20A B 344 Ni35-Cr20
#R-20

Description

USA SAE B 275 (2005), B 275 GR20B 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 GR20B
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel B 275 GR20B 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 GR20B

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 GR20B

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)
288 (≥) 648 (≥) 24 22 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade B 275 GR20B

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
33 - -     0.42 -  
949 259 - 44.3 321   -  
159 - 33 33.2   341 443

Heat Treatment of steel grade B 275 GR20B

Heat treated : 1372°C - 1468°C

Technological Curves of steel grade B 275 GR20B

Cross Reference Table (Equivalent Grade) of B 275 GR20B

Grade Standard Country Application
R-20
25Cr-20Ni
25Cr-20Ni+
29Cr-20Ni
25Cr-20Ni
25Cr-20Ni
25Cr-20Ni
25Cr-20Ni
25Cr-20Ni
29Cr-20Ni
29Cr-20Ni
29Cr-20Ni

Relevant standard of B 275 GR20B

B 275 (2005) Standard Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought B-275-(2005).pdf
B 275 GR20A B 344 Ni35-Cr20
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Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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