321S31

321S31 Stainless Steels to BS 1449-2

321S31 - Specification & Application

  • BS 1449-2 - Steel plate, sheet and strip. Specification for stainless and heat-resisting steel plate, sheet and strip
  • BS 1501-3 - Steels for pressure purposes. Specification for corrosion- and heat-resisting steels: plates, sheet and strip
  • BS 1502 - Specification for steels for fired and unfired pressure vessels: sections and bars
  • BS 1503 - Specification for steel forgings for pressure purposes
  • BS 1506 - Specification for carbon, low alloy and stainless steel bars and billets for bolting material to be used in pressure retaining applications
  • BS 1554 - Specification for stainless and heat-resisting steel round wire
  • BS 3605-1 - Austenitic stainless steel pipes and tubes for pressure purposes. Specification for seamless tubes
  • BS 3605-2 - Austenitic stainless steel pipes and tubes for pressure purposes. Specification for longitudinally welded tubes
  • BS 3606 - Specification for steel tubes for heat exchangers
  • BS 6258 - Specification for hollow steel bars for machining
  • BS 970-1 - Specification for wrought steels for mechanical and allied engineering purposes. General inspection and testing procedures and specific requirements for carbon, carbon manganese, alloy and stainless steels
  • BS 970-3 - Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes

Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes

Chemical composition(wt.%) of 321S31 grade: to BS 1449-2

Elements Min.（≥） Max.（≤） Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.03
Cr 17.00 19.00
Mo - -
Ni 9.00 12.00
Ti 5×C 0.80

321S31 - Detail

Specification for wrought steels for mechanical and allied engineering purposes. Bright bars for general engineering purposes

Mechanical properties of grade 321S31 BS 1449-2

Proof strength
Rp0.2 (MPa)		 Tensile strength
Rm (MPa)		 Impact energy
KV (J)		 Elongation at fracture
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
783 (≥) 866 (≥) 23 32 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical properties of grade 321S31 BS 1449-2

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm		 Modulus of elasticity
kN/mm2		 Expansion rate
666 (≥) 515 (≥) 11 22 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 442
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
777 579 869

Equivalent Grade

1 321S31 2 321S31 3 321S31 4 LW24 5 LWCF24

Equivalent Products

Product shapes we supply:

We can customize the production of 321S31 grade, contact us for the best solution.
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