F738 Class A4-50 S31600 Stainless Steels to F 738M (2002)

F738 Class A4-50 S31600 - Specification & Application

  • F 738M (2002) - Standard Specification for Stainless Steel Metric Bolts, Screws, and Studs

Standard Specification for Stainless Steel Metric Bolts, Screws, and Studs

Chemical composition(wt.%) of F738 Class A4-50 S31600 grade: to F 738M (2002)

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

F738 Class A4-50 S31600 - Detail

Standard Specification for Stainless Steel Metric Bolts, Screws, and Studs

Mechanical properties of grade F738 Class A4-50 S31600 F 738M (2002)

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)
496 (≥) 297 (≥) 11 42 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical properties of grade F738 Class A4-50 S31600 F 738M (2002)

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
974 (≥) 455 (≥) 41 23 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 314
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
444 231 358
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