High quality special steel supplier.Old rev.
  • Certified Company

    DNV&ABS
  • Certified Company

    ISO 9001:2008
  • R&D Production

    In China

SA-29 Grade 4340


SA-29 Grade 4340 material is AMS SA-29/SA-29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for.

Chemical composition of SA-29 Grade 4340, SA-29 Grade 4340 mechanical properties, SA-29 Grade 4340 datasheet, SA-29 Grade 4340 equivalent grade, Heat treatment and temperature process of SA-29 Grade 4340.


SA-29 Grade 4340 property sheet

SA-29 Grade 4340 Spec.

AMS SA-29/SA-29M
Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for

Chemical Composition of SA-29 Grade 4340

C: Max 0.01
Si: Max 0.20
Mn: Max 0.30
P: Max Min
S: Max Min
Ni: Max 0.15
Cr: 28.00 30.00
Al: Max Min
Cu: Max 0.15
Ti: Max Min
Fe: Max Min
N: Max 0.02
Mo: 3.50 4.20

Mechanical Properties of SA-29 Grade 4340

Rp0.2 (MPa) 422 (≥)
Rm (MPa) 421 (≥)
AKV (J) 22
A (%) 21
Z (%) 34
Hardness HBW 131

SA-29 Grade 4340 shape and dimensions

SA-29 Grade 4340 Round bar: 1mm-800mm
SA-29 Grade 4340 Square bar: 10mm * 10mm-600mm *600mm
SA-29 Grade 4340 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
SA-29 Grade 4340 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
SA-29 Grade 4340 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
SA-29 Grade 4340 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes