Sweden · SS

20 MnB 5

SS EN 10083-3

Chemical composition

wt% · log scale
0.00010.0010.010.1110B0.0008 – 0.005C0.17 – 0.23Mn1.1 – 1.4P0.025S0.035Si0.4
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2T - thickness)Tensile strength RmT - thickness)Impact energy Kv/KuT - thickness)Elongation AT - thickness)Reduction of area ZT - thickness)bars, open die forgings and die forgings +QT, 16 < d <= 40 mm or 8 < t <= 20 mmYield strength Rp0.2T - thickness)Tensile strength RmT - thickness)Elongation AT - thickness)Reduction of area ZT - thickness)bars, open die forgings and die forgings +QT, d <= 16 mm or t <= 8 mmHardnessHRhardened

Chemical composition

ElementminmaxSimilarRemarks
B0.00080.005
C0.170.23
Mn1.11.4
P0.025
S0.035
Si0.4

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
bars, open die forgings and die forgings +QT, 16 < d <= 40 mm or 8 < t <= 20 mmT - thickness)T - thickness)T - thickness)T - thickness)T - thickness)
bars, open die forgings and die forgings +QT, d <= 16 mm or t <= 8 mmT - thickness)T - thickness)T - thickness)T - thickness)
hardenedHR ≤34 HRC; Core hardness for 80% martensite; Hardened 900°C; Approx. max. d = 32mm (water) or d = 25mm (oil);

Heat treatment

Type1
Heat-treatment curveHardness-Tempering
Heat-treatment curveCCT modified
Heat-treatment curveHardenability