304 Stainless Steels to SAE AMS-QQ-S-763B (1998)

304 - Specification & Application

  • SAE AMS-QQ-S-763B (1998) - Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings
  • SAE AMS-T-6845A (1999) - Tubing, Steel, Corrosion-Resistant (S30400), Aerospace Vehicle Hydraulic System 1/8 Hard Condition
  • SAE AMS-T-8506B (1999) - Tubing, Steel, Corrosion-Resistant, (304), Annealed, Seamless and Welded

Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings

Chemical composition(wt.%) of 304 grade: to SAE AMS-QQ-S-763B (1998)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.08
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.03
Cr 18.0 20.0
Ni 8.00 10.5
N - 0.10

304 - Detail

Steel, Corrosion Resistant, Bars, Wire, Shapes, and Forgings

Mechanical properties of grade 304 SAE AMS-QQ-S-763B (1998)

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)
721 (≥) 219 (≥) 21 23 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical properties of grade 304 SAE AMS-QQ-S-763B (1998)

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
438 (≥) 856 (≥) 14 34 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 233
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
183 194 885
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