Germany · DIN
WStE 285
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 | 0.18 | |||
| Cr | 0.3 | |||
| Cr+Cu+Mo | 0.45 | |||
| Cu | 0.2 | |||
| Mn | 0.6 | 1.4 | ||
| Mo | 0.08 | |||
| N | 0.02 | |||
| Nb | 0.03 | |||
| Nb+Ti+V | 0.05 | |||
| Ni | 0.3 | |||
| P | 0.035 | |||
| S | 0.03 | |||
| Si | 0.4 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| Seamless tubes, 12 < d <= 20 mm | ≥285 | 390–510 | ≥22；≥24 | ≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115 | ||
| Seamless tubes, 20 < d <= 40 mm | ≥275 | 390–510 | ≥22；≥24 | ≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115 | ||
| Seamless tubes, 40 < d <= 50 mm | ≥265 | 390–510 | ≥22；≥24 | ≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115 | ||
| Seamless tubes, 50 < d <= 65 mm | ≥255 | 390–510 | ≥22；≥24 | ≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115 | ||
| Seamless tubes, t <= 12 mm | ≥285 | 390–510 | ≥22；≥24 | ≥31 ISO V-Notch acc. to DIN 50115；≥55 ISO V-Notch acc. to DIN 50115 |