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S.127

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S.126 S.129
#S-127

Description

UK B.S. BS S 127, S.127 Specialsteel Specification for aircraft material. 24/17 chromium-nickel heat-resisting steel (titanium stabilized) (35 tonf/sq in: limiting ruling section 6 in) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: S.127
Category Class Grade Standard Country Application
Steel GradesSpecialsteel S.127 B.S. UK Specification for aircraft material. 24/17 chromium-nickel heat-resisting steel (titanium stabilized) (35 tonf/sq in: limiting ruling section 6 in)

Chemical composition(mass fraction)(wt.%) of the S.127

C Si Mn P S Cr Ni Mo Ti
≤0.15 0.20 -1.00 0.50 -2.00 ≤0.035 ≤0.025 23.00 -26.00 16.00 -19.00 ≤ ≥ ≤4×C

Mechanical Properties of steel grade S.127

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)
823 (≥) 563 (≥) 13 34 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 433

Physical Properties of steel grade S.127

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 - -     0.12 -  
786 787 - 21.3 321   -  
954 - 14 24.2   123 334

Heat Treatment of steel grade S.127

Heat treated : 1458°C - 1476°C

Technological Curves of steel grade S.127

Relevant standard of S.127

BS S 127 Specification for aircraft material. 24/17 chromium-nickel heat-resisting steel (titanium stabilized) (35 tonf/sq in: limiting ruling section 6 in) BS-S-127.pdf
S.126 S.129
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Jiangyou Longhai Special Steel Co.,Ltd.

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