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SA-437 Grade B4D


SA-437 Grade B4D material is AMS SA-437/SA-437M Alloy Steel Turbine-Type Bolting Material Specially Heat Treated for High-Temperature Service Alloy Steel Turbine-Type Bolting Material Specially Heat Treated for High-Temperature Service.

Chemical composition of SA-437 Grade B4D, SA-437 Grade B4D mechanical properties, SA-437 Grade B4D datasheet, SA-437 Grade B4D equivalent grade, Heat treatment and temperature process of SA-437 Grade B4D.


SA-437 Grade B4D property sheet

SA-437 Grade B4D Spec.

AMS SA-437/SA-437M
Alloy Steel Turbine-Type Bolting Material Specially Heat Treated for High-Temperature Service

Chemical Composition of SA-437 Grade B4D

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 SA-437 Grade B4D

Rp0.2 (MPa) 217 (≥)
Rm (MPa) 496 (≥)
AKV (J) 32
A (%) 31
Z (%) 31
Hardness HBW 321

SA-437 Grade B4D shape and dimensions

SA-437 Grade B4D Round bar: 1mm-800mm
SA-437 Grade B4D Square bar: 10mm * 10mm-600mm *600mm
SA-437 Grade B4D Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
SA-437 Grade B4D Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
SA-437 Grade B4D Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
SA-437 Grade B4D Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes