STS631

STS631 Stainless Steels to D 3534 (2002)

STS631 - Specification & Application

  • D 3534 (2002) - Cold rolled stainless steel strip for springs
  • D 3698 (2008) - Cold rolled stainless steel plates, sheets and strip
  • D 3705 (2008) - Hot rolled stainless steel plates, sheets and strip
  • D 3706 (2008) - Stainless steel bars

Stainless steel bars

Chemical composition(wt.%) of STS631 grade: to D 3534 (2002)

Elements Min.（≥） Max.（≤） Similar Remarks
C - 0.09
Si - 1.00
Mn - 1.00
P - 0.040
S - 0.030
Cr 16.00 18.00
Ni 6.50 7.75
Mo - -
N - -
Al 0.75 1.50

STS631 - Detail

Stainless steel bars

Mechanical properties of grade STS631 D 3534 (2002)

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)
676 (≥) 431 (≥) 13 32 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 111

Physical properties of grade STS631 D 3534 (2002)

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
386 (≥) 589 (≥) 33 33 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 421
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
839 865 475

Equivalent Grade

1 STS631 2 STS631 3 STS631 4 STS631CSP 5 STS631J1

Equivalent Products

Product shapes we supply:

We can customize the production of STS631 grade, contact us for the best solution.
–sales@specificsteel.com