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321S51 490


321S51 490 material is B.S. BS 1502 Specification for steels for fired and unfired pressure vessels: sections and bars B.S. BS 1503 Specification for steel forgings for pressure purposes B.S. BS 1506 Specification for carbon, low alloy and stainless steel bars and billets for bolting material to be used in pressure retaining applications Specification for carbon, low alloy and stainless steel bars and billets for bolting material to be used in pressure retaining applications.

Chemical composition of 321S51 490, 321S51 490 mechanical properties, 321S51 490 datasheet, 321S51 490 equivalent grade, Heat treatment and temperature process of 321S51 490.


321S51 490 property sheet

321S51 490 Spec.

B.S. BS 1502
Specification for steels for fired and unfired pressure vessels: sections and bars
B.S. BS 1503
Specification for steel forgings for pressure purposes
B.S. BS 1506
Specification for carbon, low alloy and stainless steel bars and billets for bolting material to be used in pressure retaining applications

Chemical Composition of 321S51 490

C: 0.04 0.10
Si: Max 1.00
Mn: Max 2.00
P: Max 0.045
S: Max 0.025
Cr: 17.00 19.00
Mo: Max Min
Ni: 9.00 12.00
Ti: Max 0.80

Mechanical Properties of 321S51 490

Rp0.2 (MPa) 373 (≥)
Rm (MPa) 859 (≥)
AKV (J) 42
A (%) 32
Z (%) 21
Hardness HBW 424

321S51 490 shape and dimensions

321S51 490 Round bar: 1mm-800mm
321S51 490 Square bar: 10mm * 10mm-600mm *600mm
321S51 490 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
321S51 490 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
321S51 490 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
321S51 490 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes