Material number 1.0254: P235TR1
1.0254 is the European material number (Werkstoffnummer, EN 10027-2) for P235TR1, welded non-alloy pressure tube, room-temperature properties specified in EN 10217-1.
Reading 1.0254 digit by digit
An EN 10027-2 number has the form 1.XXYY. The leading 1 marks it as steel. The pair 02 is the steel group, and for this number that group is other structural steels. The final pair 54 is a sequential count inside that group and carries no meaning of its own — 1.0254 is simply the 54th entry registered there.
The group digits are the useful part. Reading 02 tells you what kind of steel you are looking at before you know anything else about it, and the 3 other numbers from group 02 held here are listed below.
1.0254 identity card
| Item | Value |
|---|---|
| Material number (EN 10027-2) | 1.0254 |
| Symbolic grade name | P235TR1 |
| Steel group | 02 — other structural steels |
| Sequential number in group | 54 |
| Specified in | EN 10217-1 |
| Steel family | Pipe & tube steel |
| Yield, first condition in the table | 235 MPa (P235TR1 / TR2 — specified, t ≤ 16 mm) |
| Tensile, same condition | 360–500 MPa |
| Cross-references held | 8 grades in 4 systems |
P235TR1 (1.0254) is the welded non-alloy pressure tube of EN 10217-1: 235 MPa yield, 360–500 MPa tensile. The TR1 and TR2 difference, and equivalents to A53 and A106.
Full data sheet for P235TR1 → · Equivalent grades → · EN 10217-1 →
Group 02 — the neighbouring numbers
Same group digits, so the same broad class of steel. The sequential digits do not rank them.