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Bulgaria BDS 85 Spring steels. Designations and technical requirements and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 85 / 85
Category Grade Standard Region/Area Standard Content
Metals 85 BDS 6742 Bulgaria Spring steels. Designations and technical requirements

Chemical composition(mass fraction)(wt.%) of the 85

Element Min Max Similar

Mechanical Properties of steel grade 85

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)
155 (≥) 669 (≥) 34 12 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 343

Physical Properties of steel grade 85

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
31 - -     0.32 -  
422 592 - 32.3 411   -  
232 - 21 11.2   321 223

Heat Treatment of steel grade 85

Heat treated : 1963°C - 1296°C

Technological Curves of steel grade 85

Cross Reference Table (Equivalent Grade) of 85

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