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S.126

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S.125 S.127
#S-126

Description

UK B.S. BS S 126, S.126 Specialsteel Specification for aircraft material. 23/14 chromium-nickel heat-resisting steel (niobium stabilized) (35 tonf/sq in: limiting ruling section 6 in) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: S.126
Category Class Grade Standard Country Application
Steel GradesSpecialsteel S.126 B.S. UK Specification for aircraft material. 23/14 chromium-nickel heat-resisting steel (niobium stabilized) (35 tonf/sq in: limiting ruling section 6 in)

Chemical composition(mass fraction)(wt.%) of the S.126

C Si Mn P S Cr Ni Mo Nb
≤0.15 0.20 -1.00 0.50 -2.00 ≤0.035 ≤0.025 22.00 -25.00 13.00 -16.00 ≤ ≥ ≤8×C

Mechanical Properties of steel grade S.126

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
972 (≥) 685 (≥) 33 13 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 233

Physical Properties of steel grade S.126

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
33 - -     0.43 -  
128 375 - 43.3 324   -  
142 - 23 43.2   231 321

Heat Treatment of steel grade S.126

Heat treated : 1279°C - 1228°C

Technological Curves of steel grade S.126

Relevant standard of S.126

BS S 126 Specification for aircraft material. 23/14 chromium-nickel heat-resisting steel (niobium stabilized) (35 tonf/sq in: limiting ruling section 6 in) BS-S-126.pdf
S.125 S.127
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Jiangyou Longhai Special Steel Co.,Ltd.

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