IC-304L Stainless Steels to MIL-S-81591

IC-304L - Specification & Application

  • MIL-S-81591 - Steel, investment castings, carbon and corrosion resisting

Steel, investment castings, carbon and corrosion resisting

Chemical composition(wt.%) of IC-304L grade: to MIL-S-81591

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.030
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.03
Cr 18.00 20.00
Ni 8.00 11.00
Mo - 0.75
Cu - 0.75

IC-304L - Detail

Steel, investment castings, carbon and corrosion resisting

Mechanical properties of grade IC-304L MIL-S-81591

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)
876 (≥) 675 (≥) 33 31 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical properties of grade IC-304L MIL-S-81591

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
292 (≥) 319 (≥) 41 42 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 242
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
654 944 274
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