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England B.S. T69 Specification for cold drawn 18/10 chromium-nickel corrosion-resisting steel tube (titanium stabilized: 800 N/mm2) (weldable) and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: T69 / T 69
Category Grade Standard Region/Area Standard Content
Metals T 69 BS T 69 England Specification for cold drawn 18/10 chromium-nickel corrosion-resisting steel tube (titanium stabilized: 800 N/mm2) (weldable)

Chemical composition(mass fraction)(wt.%) of the T 69

Element Min Max Similar
Ti - - -
Si 0.2000 1.0000 -
S - 0.0250 -
P - 0.0350 -
Ni 9.0000 12.0000 -
Mn 0.5000 2.0000 -
Cr 17.0000 19.0000 -
C - 0.0800 -

Mechanical Properties of steel grade T 69

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)
648 (≥) 638 (≥) 14 22 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 331

Physical Properties of steel grade T 69

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
13 - -     0.21 -  
288 517 - 41.3 432   -  
623 - 24 34.2   244 213

Heat Treatment of steel grade T 69

Heat treated : 1335°C - 1731°C

Technological Curves of steel grade T 69

Cross Reference Table (Equivalent Grade) of T 69

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