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SA-437 Grade B4B

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B-4 SA-437 Grade B4C
#B-4

Description

USA AMS SA-437/SA-437M, SA-437 Grade B4B Specialsteel Alloy Steel Turbine-Type Bolting Material Specially Heat Treated for High-Temperature Service and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: SA-437 Grade B4B
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel SA-437 Grade B4B Precipitation-Hardening AMS USA Alloy Steel Turbine-Type Bolting Material Specially Heat Treated for High-Temperature Service

Chemical composition(mass fraction)(wt.%) of the SA-437 Grade B4B

C Si Mn P S Ni Cr Al Cu Ti Fe Mo Co
≤0.01 ≤0.05 ≤1.50 ≤0.04 ≤0.01 ≤remaining 0.50 -1.50 0.10 -0.50 ≤0.50 ≤ ≥ 1.00 -6.00 26.00 -30.00 ≤2.50

Mechanical Properties of steel grade SA-437 Grade B4B

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)
785 (≥) 988 (≥) 43 32 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical Properties of steel grade SA-437 Grade B4B

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
31 - -     0.21 -  
661 865 - 24.3 133   -  
266 - 21 42.2   123 132

Heat Treatment of steel grade SA-437 Grade B4B

Heat treated : 1227°C - 1896°C

Technological Curves of steel grade SA-437 Grade B4B

Cross Reference Table (Equivalent Grade) of SA-437 Grade B4B

Grade Standard Country Application
B-4
ASTM B-4
ASTM B-4
ASTM B-4

Relevant standard of SA-437 Grade B4B

SA-437/SA-437M Alloy Steel Turbine-Type Bolting Material Specially Heat Treated for High-Temperature Service SA-437-SA-437M.pdf
B-4 SA-437 Grade B4C
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

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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