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Description

UK B.S. BS T 74, T.74 Specialsteel Specification for low carbon 18/10 chromium-nickel corrosion-resisting steel tube (500 N/mm2) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: T.74
Category Class Grade Standard Country Application
Steel GradesSpecialsteel T.74 B.S. UK Specification for low carbon 18/10 chromium-nickel corrosion-resisting steel tube (500 N/mm2)

Chemical composition(mass fraction)(wt.%) of the T.74

C Si Mn P S Cr Ni Mo Nb/Ti
≤0.030 0.20 -1.00 0.50 -2.00 ≤0.035 ≤0.025 17.00 -19.00 9.00 -12.00 ≤ ≥ ≤ ≥

Mechanical Properties of steel grade T.74

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)
998 (≥) 858 (≥) 42 23 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade T.74

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 - -     0.22 -  
374 197 - 13.3 333   -  
356 - 32 22.2   133 341

Heat Treatment of steel grade T.74

Heat treated : 1993°C - 1745°C

Technological Curves of steel grade T.74

Relevant standard of T.74

BS T 74 Specification for low carbon 18/10 chromium-nickel corrosion-resisting steel tube (500 N/mm2) BS-T-74.pdf

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