Material number 1.2510: 1.2510
1.2510 is the European material number (Werkstoffnummer, EN 10027-2) for 1.2510, cold-work tool steel, oil-hardening manganese-chromium-tungsten specified in EN ISO 4957.
Reading 1.2510 digit by digit
An EN 10027-2 number has the form 1.XXYY. The leading 1 marks it as steel. The pair 25 is the steel group, and for this number that group is Cr-Mo hot-work tool steels. The final pair 10 is a sequential count inside that group and carries no meaning of its own — 1.2510 is simply the 10th entry registered there.
The group digits are the useful part. Reading 25 tells you what kind of steel you are looking at before you know anything else about it, and this is the only number from group 25 held here so far.
1.2510 identity card
| Item | Value |
|---|---|
| Material number (EN 10027-2) | 1.2510 |
| Symbolic grade name | 1.2510 |
| Steel group | 25 — Cr-Mo hot-work tool steels |
| Sequential number in group | 10 |
| Specified in | EN ISO 4957 |
| Steel family | Tool steel |
| Also carries UNS | T31501 |
| Tensile, same condition | ≈ 650–750 (typ.) MPa |
| Cross-references held | 8 grades in 5 systems |
1.2510 (100MnCrW4) is the oil-hardening cold-work tool steel AISI O1: 62–64 HRC as-quenched, 58–62 HRC in service, sharp edges and low cost. Composition, heat treatment and O1/SKS3 equivalents.
Full data sheet for 1.2510 → · Equivalent grades → · EN ISO 4957 →