Germany · DIN
StE 355
DIN 17179:1986 — Seamless circular tubes of fine grain steels for special requirements; technical delivery conditions
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| Al | 0.02 | If nitrogen is additionally fixed by niobium | If nitrogen is additionally fixed by niobium | |
| C | 0.2 | |||
| Cr | 0.3 | |||
| Cr+Cu+Mo | 0.45 | |||
| Cu | 0.2 | |||
| Mn | 0.9 | 1.65 | ||
| Mo | 0.08 | |||
| N | 0.02 | |||
| Nb | 0.05 | |||
| Nb+Ti+V | 0.12 | |||
| Ni | 0.3 | The value for Nickel may be at max0 | The value for Nickel may be at max0 | |
| P | 0.035 | |||
| S | 0.03 | |||
| Si | 0.1 | 0.5 | ||
| V | 0.1 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| Seamless tubes, 12 < d <= 20 mm | ≥355 | 490–630 | ≥20;≥22 | ≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115 | ||
| Seamless tubes, 20 < d <= 40 mm | ≥345 | 490–630 | ≥20;≥22 | ≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115 | ||
| Seamless tubes, 40 < d <= 50 mm | ≥335 | 490–630 | ≥20;≥22 | ≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115 | ||
| Seamless tubes, 50 < d <= 65 mm | ≥325 | 490–630 | ≥20;≥22 | ≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115 | ||
| Seamless tubes, t <= 12 mm | ≥355 | 490–630 | ≥20;≥22 | ≥31 ISO V-Notch acc. to DIN 50115;≥55 ISO V-Notch acc. to DIN 50115 |
Physical properties
-100.0
| Elastic modulus | Mean thermal expansion | Thermal conductivity | Specific heat | Resistivity | Density | Poisson's ratio |
|---|---|---|---|---|---|---|
| 217.00 | 10.80 | 37.60 | 371.00 | 0.18 |
Typical physical values
| Density | Elastic modulus | Poisson's ratio | Remarks |
|---|---|---|---|
| 7.86 | 203.00 | 0.27–0.30 | 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
| Grade | Region | System |
|---|---|---|
| StE 355 | SEW | |
| 1.0562 | DIN |