A 988 S17400 Stainless Steels to A 988/A 988M (2011)

A 988 S17400 - 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 S17400 grade: to A 988/A 988M (2011)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.07
Mn - 1.00
Si - 1.00
P - 0.04
S - 0.03
Cr 15.50 17.50
Ni 3.00 5.00
Mo - -
Cu 3.00 5.00
Nb 0.15 0.45

A 988 S17400 - Detail

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

Mechanical properties of grade A 988 S17400 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)
383 (≥) 142 (≥) 42 13 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical properties of grade A 988 S17400 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
714 (≥) 279 (≥) 23 11 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 141
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
235 226 733
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