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

    DNV&ABS
  • Certified Company

    ISO 9001:2008
  • R&D Production

    In China

321S51


321S51 material is B.S. BS 1501-3 Steels for pressure purposes. Specification for corrosion- and heat-resisting steels: plates, sheet and strip B.S. BS 3059-2 Steel boiler and superheater tubes. Specification for carbon, alloy and austenitic stainless steel tubes with specified elevated temperature properties Steel boiler and superheater tubes. Specification for carbon, alloy and austenitic stainless steel tubes with specified elevated temperature properties.

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


321S51 property sheet

321S51 Spec.

B.S. BS 1501-3
Steels for pressure purposes. Specification for corrosion- and heat-resisting steels: plates, sheet and strip
B.S. BS 3059-2
Steel boiler and superheater tubes. Specification for carbon, alloy and austenitic stainless steel tubes with specified elevated temperature properties

Chemical Composition of 321S51

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

Rp0.2 (MPa) 858 (≥)
Rm (MPa) 795 (≥)
AKV (J) 14
A (%) 43
Z (%) 13
Hardness HBW 423

321S51 shape and dimensions

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