A 988 S31651 Stainless Steels to A 988/A 988M (2011)

A 988 S31651 - Specification & Application

  • A 988/A 988M (2011) - Hot Isostatically-Pressed Stainless Steel Flanges, Fittings, Valves, and Parts for High Temperature Service

Hot Isostatically-Pressed Stainless Steel Flanges, Fittings, Valves, and Parts for High Temperature Service

Chemical composition(wt.%) of A 988 S31651 grade: to A 988/A 988M (2011)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.03
Cr 16.0 18.0
Ni 10.0 14.0
Mo 2.00 3.00
N 0.10 0.16

A 988 S31651 - Detail

Hot Isostatically-Pressed Stainless Steel Flanges, Fittings, Valves, and Parts for High Temperature Service

Mechanical properties of grade A 988 S31651 A 988/A 988M (2011)

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)
561 (≥) 923 (≥) 42 11 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 113

Physical properties of grade A 988 S31651 A 988/A 988M (2011)

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
126 (≥) 397 (≥) 21 43 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 414
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
344 463 397

Equivalent Products

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