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B 477 Grade A

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B 472 R30556 B 477 Grade B
#B-4

Description

USA SAE B 477 (1997), B 477 Grade A Specialsteel Gold-Silver-Nickel Electrical Contact Alloy and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: B 477 Grade A
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel B 477 Grade A Precipitation-Hardening SAE USA Gold-Silver-Nickel Electrical Contact Alloy

Chemical composition(mass fraction)(wt.%) of the B 477 Grade A

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 B 477 Grade A

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)
833 (≥) 968 (≥) 34 24 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical Properties of steel grade B 477 Grade A

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
32 - -     0.42 -  
924 197 - 43.3 442   -  
793 - 13 12.2   321 432

Heat Treatment of steel grade B 477 Grade A

Heat treated : 1963°C - 1239°C

Technological Curves of steel grade B 477 Grade A

Cross Reference Table (Equivalent Grade) of B 477 Grade A

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

Relevant standard of B 477 Grade A

B 477 (1997) Gold-Silver-Nickel Electrical Contact Alloy B-477-(1997).pdf
B 472 R30556 B 477 Grade B
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Jiangyou Longhai Special Steel Co.,Ltd.

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