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Description

UK B.S. BS HR 240 (1972), BS 2HR 240 (2011), HR240 Specialsteel Specification for cobalt-chromium-tungsten-nickel-manganese heat-resisting alloy plate, sheet and strip (cobalt base Cr 20, W 15, Ni 10, Mn 1.5) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: HR240
Category Class Grade Standard Country Application
Steel GradesSpecialsteel HR240 B.S. UK Specification for cobalt-chromium-tungsten-nickel-manganese heat-resisting alloy plate, sheet and strip (cobalt base Cr 20, W 15, Ni 10, Mn 1.5)

Chemical composition(mass fraction)(wt.%) of the HR240

C Si Mn P S Cr Ni Mo Co Ti Fe W
0.05 -0.15 ≤0.40 1.00 -2.00 ≤0.040 ≤0.030 19.00 -21.00 9.00 -11.00 ≤ ≥ ≤remaining ≤ ≥ ≤3.00 14.00 -16.00

Mechanical Properties of steel grade HR240

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)
235 (≥) 227 (≥) 13 24 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 324

Physical Properties of steel grade HR240

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
43 - -     0.34 -  
236 811 - 41.3 333   -  
796 - 42 31.2   322 242

Heat Treatment of steel grade HR240

Heat treated : 1796°C - 1117°C

Technological Curves of steel grade HR240

Relevant standard of HR240

BS HR 240 (1972) Specification for cobalt-chromium-tungsten-nickel-manganese heat-resisting alloy plate, sheet and strip (cobalt base Cr 20, W 15, Ni 10, Mn 1.5) BS-HR-240-(1972).pdf
BS 2HR 240 (2011) Specification for cobalt-chromium-tungsten-nickel-manganese heat-resisting alloy plate, sheet and strip (cobalt base Cr 20, W 15, Ni 10, Mn 1.5) BS-2HR-240-(2011).pdf

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