ASTM631 Stainless Steels

ASTM631 - Specification & Application

ASTM631

Chemical composition(wt.%) of ASTM631 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.09
Si - 1.00
Mn - 1.00
P - 0.04
S - 0.04
Cr 16.0 18.0
Ni 6.5 7.75
Al 0.75 1.50

ASTM631 - Detail

ASTM631

Mechanical properties of grade ASTM631

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)
297 (≥) 666 (≥) 41 21 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical properties of grade ASTM631

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
455 (≥) 274 (≥) 13 12 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 343
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
974 171 446
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