S.125 Stainless Steels to BS S 125

S.125 - Specification & Application

  • BS S 125 - Specification for aircraft material. 23/14 chromium-nickel heat-resisting steel (titanium stabilized) (35 tonf/sq in: limiting ruling section 6 in)

Specification for aircraft material. 23/14 chromium-nickel heat-resisting steel (titanium stabilized) (35 tonf/sq in: limiting ruling section 6 in)

Chemical composition(wt.%) of S.125 grade: to BS S 125

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.15
Si 0.20 1.00
Mn 0.50 2.00
P - 0.035
S - 0.025
Cr 22.00 25.00
Ni 13.00 16.00
Mo - -
Ti - 4×C

S.125 - Detail

Specification for aircraft material. 23/14 chromium-nickel heat-resisting steel (titanium stabilized) (35 tonf/sq in: limiting ruling section 6 in)

Mechanical properties of grade S.125 BS S 125

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)
239 (≥) 283 (≥) 33 13 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

Physical properties of grade S.125 BS S 125

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
717 (≥) 825 (≥) 14 14 23 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
994 197 971

Equivalent Grade

Equivalent Products

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