Czech Republic · CSN

1.8515

CSN EN 10085 — Nitriding steel. Technical delivery conditions

Chemical composition

wt% · log scale
0.010.1110C0.28 – 0.35Cr2.8 – 3.3Mn0.4 – 0.7Mo0.3 – 0.5P0.025S0.035Si0.4
  • min – max range
  • typical value

Mechanical properties

value range by condition
Hardness钢棒bars, semi-finished products +A, heavy plate, forgingsYield strength Rp0.2735 MPaTensile strength Rm930 MPaImpact energy Kv/Ku30 JElongation A12 %bars, forgings +QT, > 100 <= 160 mm, heavy plateYield strength Rp0.2675 MPaTensile strength Rm880 MPaImpact energy Kv/Ku30 JElongation A12 %bars, forgings +QT, > 160 <= 250 mm, heavy plateYield strength Rp0.2785 MPaTensile strength Rm980 MPaImpact energy Kv/Ku30 JElongation A11 %bars, forgings +QT, > 40 <= 100 mm, heavy plate

Chemical composition

ElementminmaxSimilarRemarks
C0.280.35
Cr2.83.3
Mn0.40.7
Mo0.30.5
P0.025
S0.035By agreement between the purchaser and manufacturer
Si0.4

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
bars, semi-finished products +A, heavy plate, forgings钢棒 HB
bars, forgings +QT, > 100 <= 160 mm, heavy plate735930 1130.001230
bars, forgings +QT, > 160 <= 250 mm, heavy plate675880 1080.001230
bars, forgings +QT, > 40 <= 100 mm, heavy plate785980 1180.001130
bars, forgings +QT, >= 16 <= 40 mm, heavy plate8351030 1230.001025
nitridedHV ≥800

Heat treatment

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