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Description

UK B.S. BS T 72-T 73, T.72 Specialsteel Specifications for 18/10 chromium-nickel corrosion-resisting steel tube for hydraulic purposes (niobium/titanium stabilized: 550 MPa) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: T.72
Category Class Grade Standard Country Application
Steel GradesSpecialsteel T.72 B.S. UK Specifications for 18/10 chromium-nickel corrosion-resisting steel tube for hydraulic purposes (niobium/titanium stabilized: 550 MPa)

Chemical composition(mass fraction)(wt.%) of the T.72

C Si Mn P S Cr Ni Mo Nb Cu
≤0.08 0.20 -1.00 0.50 -2.00 ≤0.035 ≤0.025 17.00 -19.00 9.00 -12.00 ≤ ≥ 10×C -1.00 ≤0.50

Mechanical Properties of steel grade T.72

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)
813 (≥) 891 (≥) 13 42 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 143

Physical Properties of steel grade T.72

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
32 - -     0.24 -  
179 562 - 24.3 313   -  
613 - 44 22.2   141 412

Heat Treatment of steel grade T.72

Heat treated : 1534°C - 1223°C

Technological Curves of steel grade T.72

Relevant standard of T.72

BS T 72-T 73 Specifications for 18/10 chromium-nickel corrosion-resisting steel tube for hydraulic purposes (niobium/titanium stabilized: 550 MPa) BS-T-72-T-73.pdf

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