T.74 Stainless Steels to BS T 74

T.74 - Specification & Application

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

Specification for low carbon 18/10 chromium-nickel corrosion-resisting steel tube (500 N/mm2)

Chemical composition(wt.%) of T.74 grade: to BS T 74

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.030
Si 0.20 1.00
Mn 0.50 2.00
P - 0.035
S - 0.025
Cr 17.00 19.00
Ni 9.00 12.00
Mo - -
Nb/Ti - -

T.74 - Detail

Specification for low carbon 18/10 chromium-nickel corrosion-resisting steel tube (500 N/mm2)

Mechanical properties of grade T.74 BS T 74

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
212 (≥) 737 (≥) 23 33 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 332

Physical properties of grade T.74 BS T 74

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
181 (≥) 366 (≥) 11 23 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 122
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
776 353 739

Equivalent Grade

Equivalent Products

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