Czech Republic · CSN

1.7219

CSN EN 10216-4

Chemical composition

wt% · log scale
0.010.1110C0.22 – 0.29Cr0.9 – 1.2Cu0.3Mn0.5 – 0.8Mo0.15 – 0.3P0.025S0.02Si0.35
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≥400 MPaTensile strength Rm560–740 MPaImpact energy Kv/Ku≥60 JImpact energy Kv/Ku≥50 JImpact energy Kv/Ku≥45 JImpact energy Kv/Ku≥40 JElongation A≥18 %

High / low temperature

value vs. temperature
38.841.945.048.151.2-60-40-20°C
  • Seamless tubes quenched and tempered +QT T <= 40 mm +T · Impact energy Kv/Ku

Chemical composition

ElementminmaxSimilarRemarks
C0.220.29
Cr0.91.2
Cu0.3In order to facilitate subsequent forming operation
Mn0.50.8
Mo0.150.3
P0.025
S0.02
Si0.35

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
Seamless tubes +QT, T <= 40 mm≥400 Upper yield stress is proof stress560–740≥18 Long. direction≥60 KV (20°C)；≥50 KV (-20°C)；≥45 KV (-40°C)；≥40 KV (-60°C

High/low temperature

Impact energy Kv/Ku (J)
ConditionTemperature ℃minRemarks
Seamless tubes quenched and tempered +QT T <= 40 mm +T-2050KV
Seamless tubes quenched and tempered +QT T <= 40 mm +T-4045KV
Seamless tubes quenched and tempered +QT T <= 40 mm +T-6040KV (-60°C

Heat treatment

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