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T.72

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T.69 T.73
#T-72

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)
532 (≥) 968 (≥) 31 21 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

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
44 - -     0.24 -  
673 789 - 23.3 242   -  
415 - 23 44.2   421 221

Heat Treatment of steel grade T.72

Heat treated : 1646°C - 1278°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
T.69 T.73
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