Czech Republic · CSN

19 MnB 4

CSN EN 10269 — Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

Chemical composition

wt% · log scale
0.00010.0010.010.1110Al0.02B0.0008 – 0.005C0.17 – 0.24Mn0.8 – 1.15P0.035S0.035Si0.4
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≥640 MPaTensile strength Rm800–950 MPaImpact energy Kv/Ku≥27 JImpact energy Kv/Ku≥40 JElongation A≥14 %Reduction of area Z≥52 %fasteners +QT, <= 16 mmTensile strength Rm≤520 MPaReduction of area Z≥64 %fasteners +AC

Chemical composition

ElementminmaxSimilarRemarks
Al0.02Al total
B0.00080.005
C0.170.24
Mn0.81.15
P0.035
S0.035
Si0.4

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
fasteners +QT, <= 16 mm≥640800–950≥14 after fracture≥52≥27 Charpy V Notch (-60°C)；≥40 Charpy V Notch (0°C
fasteners +AC≤520≥64

High/low temperature

Impact energy Kv/Ku (J)
ConditionTemperature ℃minRemarks
fasteners quenched and tempered +QT <= 16 mm-6027Charpy V Notch