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Description

UK B.S. BS 6323-8, LWCF21 Specialsteel Specification for seamless and welded steel tubes for automobile , mechanical and general engineering purposes. Specific requirements for longitudinally welded stainless steel tubes and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: LWCF21
Category Class Grade Standard Country Application
Steel GradesSpecialsteel LWCF21 B.S. UK Specification for seamless and welded steel tubes for automobile , mechanical and general engineering purposes. Specific requirements for longitudinally welded stainless steel tubes

Chemical composition(mass fraction)(wt.%) of the LWCF21

C Si Mn P S Cr Ni Mo
≤0.06 ≤1.00 ≤2.00 ≤0.045 ≤0.030 17.50 -19.00 8.00 -11.00 ≤ ≥

Mechanical Properties of steel grade LWCF21

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)
417 (≥) 274 (≥) 31 42 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade LWCF21

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
42 - -     0.21 -  
582 915 - 31.3 341   -  
113 - 21 12.2   432 321

Heat Treatment of steel grade LWCF21

Heat treated : 1837°C - 1787°C

Technological Curves of steel grade LWCF21

Cross Reference Table (Equivalent Grade) of LWCF21

Grade Standard Country Application
304S15
304S15

Relevant standard of LWCF21

BS 6323-8 Specification for seamless and welded steel tubes for automobile , mechanical and general engineering purposes. Specific requirements for longitudinally welded stainless steel tubes BS-6323-8.pdf

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