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A 299 Grade B


A 299 Grade B material is SAE A 299/A 299M (2009) Pressure Vessel Plates, Carbon Steel, Manganese-Silicon Pressure Vessel Plates, Carbon Steel, Manganese-Silicon.

Chemical composition of A 299 Grade B, A 299 Grade B mechanical properties, A 299 Grade B datasheet, A 299 Grade B equivalent grade, Heat treatment and temperature process of A 299 Grade B.


A 299 Grade B property sheet

A 299 Grade B Spec.

SAE A 299/A 299M (2009)
Pressure Vessel Plates, Carbon Steel, Manganese-Silicon

Chemical Composition of A 299 Grade B

C: 0.08 0.15
Si: Max 0.75
Mn: 1.00 2.00
P: Max Min
S: Max 0.03
Ni: 8.50 10.50
Cr: 27.00 31.00
Al: Max Min
Cu: Max 0.50
Ti: Max Min
Fe: Max Min
N: Max Min
Mo: Max 0.50

Mechanical Properties of A 299 Grade B

Rp0.2 (MPa) 696 (≥)
Rm (MPa) 671 (≥)
AKV (J) 31
A (%) 33
Z (%) 12
Hardness HBW 112

A 299 Grade B shape and dimensions

A 299 Grade B Round bar: 1mm-800mm
A 299 Grade B Square bar: 10mm * 10mm-600mm *600mm
A 299 Grade B Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
A 299 Grade B Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
A 299 Grade B Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
A 299 Grade B Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes