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B 477 Grade A


B 477 Grade A material is SAE B 477 (1997) Gold-Silver-Nickel Electrical Contact Alloy Gold-Silver-Nickel Electrical Contact Alloy.

Chemical composition of B 477 Grade A, B 477 Grade A mechanical properties, B 477 Grade A datasheet, B 477 Grade A equivalent grade, Heat treatment and temperature process of B 477 Grade A.


B 477 Grade A property sheet

B 477 Grade A Spec.

SAE B 477 (1997)
Gold-Silver-Nickel Electrical Contact Alloy

Chemical Composition of B 477 Grade A

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

Mechanical Properties of B 477 Grade A

Rp0.2 (MPa) 777 (≥)
Rm (MPa) 832 (≥)
AKV (J) 31
A (%) 33
Z (%) 22
Hardness HBW 113

B 477 Grade A shape and dimensions

B 477 Grade A Round bar: 1mm-800mm
B 477 Grade A Square bar: 10mm * 10mm-600mm *600mm
B 477 Grade A Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
B 477 Grade A Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
B 477 Grade A Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
B 477 Grade A Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes