Germany · DIN

StE 355

DIN 17179:1986 — Seamless circular tubes of fine grain steels for special requirements; technical delivery conditions

Chemical composition

ElementminmaxSimilarRemarks
Al0.02If nitrogen is additionally fixed by niobiumIf nitrogen is additionally fixed by niobium
C0.2
Cr0.3
Cr+Cu+Mo0.45
Cu0.2
Mn0.91.65
Mo0.08
N0.02
Nb0.05
Nb+Ti+V0.12
Ni0.3The value for Nickel may be at max0The value for Nickel may be at max0
P0.035
S0.03
Si0.10.5
V0.1

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
Seamless tubes, 12 < d <= 20 mm≥355490–630≥20;≥22≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115
Seamless tubes, 20 < d <= 40 mm≥345490–630≥20;≥22≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115
Seamless tubes, 40 < d <= 50 mm≥335490–630≥20;≥22≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115
Seamless tubes, 50 < d <= 65 mm≥325490–630≥20;≥22≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115
Seamless tubes, t <= 12 mm≥355490–630≥20;≥22≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115

Physical properties

-100.0

Elastic modulusMean thermal expansionThermal conductivitySpecific heatResistivityDensityPoisson's ratio
217.0010.8037.60371.000.18

Typical physical values

DensityElastic modulusPoisson's ratioRemarks
7.86203.000.27–0.30低碳,低合金钢的典型性能数值。此值不来源于标准,它是指示性指标,不能被用于设计用途。

Similar grades

GradeRegionSystem
StE 355GermanySEW
1.0562GermanyDIN