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Description

UK B.S. BS970: 1991, 665M17 Specialsteel Black 2% low carbon nickel molybdenum case hardening steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 665M17
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 665M17 B.S. UK Black 2% low carbon nickel molybdenum case hardening steel

Chemical composition(mass fraction)(wt.%) of the 665M17

C Si Mn Mo Ni
0.140 -0.200 0.10 -1.40 0.35 -0.75 0.20 -0.30 1.50 -2.00

Mechanical Properties of steel grade 665M17

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)
158 (≥) 219 (≥) 13 14 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 424

Physical Properties of steel grade 665M17

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
22 - -     0.12 -  
881 497 - 14.3 433   -  
873 - 23 34.2   343 143

Heat Treatment of steel grade 665M17

Heat treated : 1293°C - 1213°C

Technological Curves of steel grade 665M17

Relevant standard of 665M17

BS970: 1991 Black 2% low carbon nickel molybdenum case hardening steel BS970:-1991.pdf

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