Material number 1.3343: 1.3343
1.3343 is the European material number (Werkstoffnummer, EN 10027-2) for 1.3343, high-speed steel, tungsten-molybdenum specified in EN ISO 4957.
Reading 1.3343 digit by digit
An EN 10027-2 number has the form 1.XXYY. The leading 1 marks it as steel. The pair 33 is the steel group, and for this number that group is high-speed steels (with Co). The final pair 43 is a sequential count inside that group and carries no meaning of its own — 1.3343 is simply the 43th entry registered there.
The group digits are the useful part. Reading 33 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 33 held here so far.
1.3343 identity card
| Item | Value |
|---|---|
| Material number (EN 10027-2) | 1.3343 |
| Symbolic grade name | 1.3343 |
| Steel group | 33 — high-speed steels (with Co) |
| Sequential number in group | 43 |
| Specified in | EN ISO 4957 |
| Steel family | Tool steel |
| Also carries UNS | T11302 |
| Tensile, same condition | ≈ 800–900 (typ.) MPa |
| Cross-references held | 8 grades in 5 systems |
1.3343 (HS6-5-2C) is AISI M2, the general-purpose high-speed steel: 64–66 HRC and red hardness to 600 °C. Composition, the 1190–1230 °C hardening window, triple tempering and M2/SKH51 equivalents.
Full data sheet for 1.3343 → · Equivalent grades → · EN ISO 4957 →