A 988 S32750 Stainless Steels to A 988/A 988M (2011)

A 988 S32750 - 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 S32750 grade: to A 988/A 988M (2011)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.03
Mn - 1.20
Si - 0.80
P - 0.035
S - 0.02
Cr 24.00 26.00
Ni 6.00 8.00
Mo 3.00 5.00
N 0.24 0.32
Cu - 0.50

A 988 S32750 - Detail

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

Mechanical properties of grade A 988 S32750 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)
228 (≥) 558 (≥) 22 14 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 344

Physical properties of grade A 988 S32750 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
926 (≥) 147 (≥) 11 41 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 342
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
574 175 722
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