321S51

321S51 Stainless Steels to BS 1501-3

321S51 - Specification & Application

  • BS 1501-3 - Steels for pressure purposes. Specification for corrosion- and heat-resisting steels: plates, sheet and strip
  • 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(wt.%) of 321S51 grade: to BS 1501-3

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.04 0.10
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.025
Cr 17.00 19.00
Mo - -
Ni 9.00 12.00
Ti - 0.80

321S51 - Detail

Steel boiler and superheater tubes. Specification for carbon, alloy and austenitic stainless steel tubes with specified elevated temperature properties

Mechanical properties of grade 321S51 BS 1501-3

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)
384 (≥) 835 (≥) 23 23 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical properties of grade 321S51 BS 1501-3

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
371 (≥) 364 (≥) 34 41 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 422
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
776 298 968

Equivalent Grade

1 321S51(1010) 2 321S51(1105) 3 321S51(1010) 4 321S51(1105) 5 321S51 6 321S51 490 7 321S51 510 8 321S51 520

Equivalent Products

Product shapes we supply:

We can customize the production of 321S51 grade, contact us for the best solution.
–sales@specificsteel.com