A 988 S31600 Stainless Steels to A 988/A 988M (2011)

A 988 S31600 - 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 S31600 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

A 988 S31600 - Detail

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

Mechanical properties of grade A 988 S31600 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)
133 (≥) 332 (≥) 43 41 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

Physical properties of grade A 988 S31600 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
251 (≥) 264 (≥) 24 21 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 212
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
363 549 439
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