Germany · DIN
1.8977
DIN EN 10208-2:2009 — Steel pipes for pipelines for combustible fluids - Technical delivery conditions - Part 2: Pipes of requirements class B; German version EN 10208-2:1996
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| Al | 0.015 | 0.06 | Al/N >= 2:1 | Al/N >= 2:1 |
| C | 0.16 | |||
| CEV | 0.43 | CEV= C + Mn/6 + (Cr+Mo+V)/5 + (Cr+Ni)/15; the CEV is only specified for the product analysis. | CEV= C + Mn/6 + (Cr+Mo+V)/5 + (Cr+Ni)/15; the CEV is only specified for the product analysis. | |
| Cr | 0.3 | |||
| Cu | 0.25 | |||
| Mn | 1.7 | For each reduction of 0 | For each reduction of 0 | |
| Mo | 0.1 | For these steel grades a molybdenum content up to 0 | For these steel grades a molybdenum content up to 0 | |
| N | 0.012 | |||
| Nb | 0.06 | |||
| Ni | 0.3 | |||
| Other | Chemical composition for larger wall thicknesses up to 40 mm is to be agreed. | Chemical composition for larger wall thicknesses up to 40 mm is to be agreed. | ||
| P | 0.025 | |||
| S | 0.02 | |||
| Si | 0.45 | |||
| Ti | 0.06 | |||
| V | 0.1 | |||
| V+Nb+Ti | 0.15 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| steel tubes +M, <= 25 mm | 485–605 Yield stress is Rt0 | ≥570 | ≥18 For transverse specimens; for longitudinal specimens the values of A shall be 2 units higher. |