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A 646 Grade HP 9-4-20


A 646 Grade HP 9-4-20 material is SAE A 646/A 646M (2011) Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings.

Chemical composition of A 646 Grade HP 9-4-20, A 646 Grade HP 9-4-20 mechanical properties, A 646 Grade HP 9-4-20 datasheet, A 646 Grade HP 9-4-20 equivalent grade, Heat treatment and temperature process of A 646 Grade HP 9-4-20.


A 646 Grade HP 9-4-20 property sheet

A 646 Grade HP 9-4-20 Spec.

SAE A 646/A 646M (2011)
Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings

Chemical Composition of A 646 Grade HP 9-4-20

C: 0.17 0.23
Si: Max 0.10
Mn: Max 0.20
Ni: Max 0.65
Cr: Max 0.40
Al: 4.25 4.75
Cu: Max Min
Ti: Max Min
Fe: Max Min
Mo: Max 0.85
Co: 8.50 9.50
V: 0.06 0.12
P: Max 0.01
S: Max 0.01
W: 0.90 1.10

Mechanical Properties of A 646 Grade HP 9-4-20

Rp0.2 (MPa) 894 (≥)
Rm (MPa) 657 (≥)
AKV (J) 41
A (%) 24
Z (%) 11
Hardness HBW 233

A 646 Grade HP 9-4-20 shape and dimensions

A 646 Grade HP 9-4-20 Round bar: 1mm-800mm
A 646 Grade HP 9-4-20 Square bar: 10mm * 10mm-600mm *600mm
A 646 Grade HP 9-4-20 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
A 646 Grade HP 9-4-20 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
A 646 Grade HP 9-4-20 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
A 646 Grade HP 9-4-20 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes