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21 B 3 DF

Spain UNE 21B3DF Steel for cold heading and cold extruding. Steel for quenching and tempering and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 21B3DF / 21 B 3 DF
Category Grade Standard Region/Area Standard Content
Metals 21 B 3 DF UNE 36034 Spain Steel for cold heading and cold extruding. Steel for quenching and tempering

Chemical composition(mass fraction)(wt.%) of the 21 B 3 DF

Element Min Max Similar

Mechanical Properties of steel grade 21 B 3 DF

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)
695 (≥) 658 (≥) 32 14 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 443

Physical Properties of steel grade 21 B 3 DF

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
42 - -     0.24 -  
464 733 - 11.3 141   -  
659 - 11 32.2   211 213

Heat Treatment of steel grade 21 B 3 DF

Heat treated : 1946°C - 1128°C

Technological Curves of steel grade 21 B 3 DF

Cross Reference Table (Equivalent Grade) of 21 B 3 DF

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