DIN1626 seamless steel ST42 pipe
The EN 10216 comprises several parts. The parts that are relevant to us are as follows:
EN 10216 Part 1: non-alloy pipes with specified properties at room temperature
EN 10216 Part 2: non-alloy pipes with specified properties at higher temperatures
EN 10216 Part 3: alloy pipes made from fine-grained steel for any temperature
EN 10216-1, Quality P235TR2 (formerly DIN 1629, St.37.0) P = Pressure 235 = minimum yield strength in N/mm2 TR2 = quality with specified properties relating to aluminum content, impact values and inspection and test requirements. (In contrast to TR1, for which this is not specified). EN 10216-3, Quality P355 N (more or less equivalent to DIN 1629, St.52.0) P = Pressure 355 = minimum yield strength in N/mm2 N = normalized*
| DIN 1269 Industrial pipe Mechanical Property &Chemical Components | ||||||||
| Material | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) | C | Si | Mn | P、S | Cr |
| St37.0 | 350～480 | ≥235 | ≥25 | ≤0.17 | / | / | ≤0.04 | / |
| St44.0 | 420～550 | ≥255 | ≥21 | ≤0.21 | / | / | ≤0.04 | / |
| St52.0 | 500～650 | ≥270 | ≥21 | ≤0.22 | ≤0.55 | ≤1.70 | ≤0.04 | / |
| OLD | New | ||||
| Execution | Norm | Steel grade | Execution | Norm | Steel grade |
| Welded | DIN 1626 | St.37.0 | Welded | DIN EN 10217-1 | P235TR2 |
| Welded | DIN 1626 | St.52.2 | Welded | DIN EN 10217-3 | P355N |
| Seamless | DIN 1629 | St.37.0 | Seamless | DIN EN 10216-1 | P235TR2 |
| Seamless | DIN 1629 | St.52.2 | Seamless | DIN EN 10216-3 | P355N |
| Seamless | DIN 17175 | St.35.8/1 | Seamless | DIN EN 10216-2 | P235GH |
| Seamless | ASTM A106* | Grade B | Seamless | DIN EN 10216-2 | P265GH |
| Seamless | ASTM A333* | Grade 6 | Seamless | DIN EN 10216-4 | P265NL |