Sweden · SS

1.5680

SS EN 10216-4

Chemical composition

wt% · log scale
0.0010.010.1110C0.15Cu0.3Mn0.3 – 0.8Ni4.5 – 5.3P0.02S0.01Si0.35V0.05
  • min – max range
  • typical value

Mechanical properties

value range by condition
Impact energy Kv/Ku≥70 JImpact energy Kv/Ku≥65 JImpact energy Kv/Ku≥65 JImpact energy Kv/Ku≥65 JImpact energy Kv/Ku≥60 JImpact energy Kv/Ku≥50 JImpact energy Kv/Ku≥45 JImpact energy Kv/Ku≥40 JSeamless tubes;25 < t ≤ 40 mm +NTYield strength Rp0.2≥390 MPaTensile strength Rm510–710 MPaImpact energy Kv/Ku≥70 JImpact energy Kv/Ku≥70 JImpact energy Kv/Ku≥65 JImpact energy Kv/Ku≥65 JImpact energy Kv/Ku≥65 JImpact energy Kv/Ku≥55 JImpact energy Kv/Ku≥50 JImpact energy Kv/Ku≥45 JImpact energy Kv/Ku≥40 JElongation A≥21 %Seamless tubes;t ≤ 25 mm +NTYield strength Rp0.2≥390 MPaTensile strength Rm510–710 MPaImpact energy Kv/Ku≥40 JElongation A≥21 %Seamless tubes;t ≤ 25 mm +QT

High / low temperature

value vs. temperature
36.445.755.064.373.6-110-100-90-60-50-40-20°C
  • Seamless tubes normalized and tempered +NT 25 < T <= 40 mm +T · Impact energy Kv/Ku
  • Seamless tubes normalized and tempered +NT T <= 25 mm +T · Impact energy Kv/Ku

Chemical composition

ElementminmaxSimilarRemarks
C0.15
Cu0.3In order to facilitate subsequent forming operation
Mn0.30.8
Ni4.55.3
P0.02
S0.01
Si0.35
V0.05

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
Seamless tubes;25 < t ≤ 40 mm +NT≥70 KV (20°C)；≥65 KV (-20°C)；≥65 KV (-40°C)；≥65 KV (-50°C)；≥60 KV (-60°C)；≥50 KV (-90°C)；≥45 KV (-100°C)；≥40 KV (-110°C)
Seamless tubes;t ≤ 25 mm +NT≥390 Upper yield stress is proof stress510–710≥21 Long. direction≥70 KV (20°C)；≥70 KV (-20°C)；≥65 KV (-40°C)；≥65 KV (-50°C)；≥65 KV (-60°C)；≥55 KV (-90°C)；≥50 KV (-100°C)；≥45 KV (-110°C)；≥40 KV (-120°C)
Seamless tubes;t ≤ 25 mm +QT≥390 Upper yield stress is proof stress510–710≥21 Long. direction≥40 KV (-120°C)

High/low temperature

Impact energy Kv/Ku (J)
ConditionTemperature ℃minRemarks
Seamless tubes normalized and tempered +NT 25 < T <= 40 mm +T-2065KV
Seamless tubes normalized and tempered +NT 25 < T <= 40 mm +T-4065KV
Seamless tubes normalized and tempered +NT 25 < T <= 40 mm +T-5065KV
Seamless tubes normalized and tempered +NT 25 < T <= 40 mm +T-6060KV
Seamless tubes normalized and tempered +NT 25 < T <= 40 mm +T-9050KV
Seamless tubes normalized and tempered +NT 25 < T <= 40 mm +T-10045KV
Seamless tubes normalized and tempered +NT 25 < T <= 40 mm +T-11040KV
Seamless tubes quenched and tempered +QT T <= 25 mm +T-12040KV
Seamless tubes normalized and tempered +NT T <= 25 mm +T-2070KV
Seamless tubes normalized and tempered +NT T <= 25 mm +T-4065KV
Seamless tubes normalized and tempered +NT T <= 25 mm +T-5065KV
Seamless tubes normalized and tempered +NT T <= 25 mm +T-6065KV
Seamless tubes normalized and tempered +NT T <= 25 mm +T-9055KV
Seamless tubes normalized and tempered +NT T <= 25 mm +T-10050KV
Seamless tubes normalized and tempered +NT T <= 25 mm +T-11045KV
Seamless tubes normalized and tempered +NT T <= 25 mm +T-12040KV

Heat treatment

Type1
Heat-treatment curveCCT
Heat-treatment curveTTT