Material number 1.5415: 16Mo3
1.5415 is the European material number (Werkstoffnummer, EN 10027-2) for 16Mo3, molybdenum-alloyed steel for pressure purposes at elevated temperature specified in EN 10028-2.
Reading 1.5415 digit by digit
An EN 10027-2 number has the form 1.XXYY. The leading 1 marks it as steel. The pair 54 is the steel group, and for this number that group is Mo / Nb / Ti / V / W steels. The final pair 15 is a sequential count inside that group and carries no meaning of its own — 1.5415 is simply the 15th entry registered there.
The group digits are the useful part. Reading 54 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 54 held here so far.
1.5415 identity card
| Item | Value |
|---|---|
| Material number (EN 10027-2) | 1.5415 |
| Symbolic grade name | 16Mo3 |
| Steel group | 54 — Mo / Nb / Ti / V / W steels |
| Sequential number in group | 15 |
| Specified in | EN 10028-2 |
| Steel family | Pressure vessel steel |
| Yield, first condition in the table | 275 MPa (≤ 16 mm, +N) |
| Tensile, same condition | 440–590 MPa |
| Cross-references held | 9 grades in 5 systems |
16Mo3 (1.5415, ex 15Mo3) is the 0.3 % Mo creep-resisting pressure steel of EN 10028-2: 275 MPa yield, 440–590 MPa tensile, Rp0.2 guaranteed to 500 °C. Composition, temperature table, A204/SA-204 and 15Mo3 equivalents.
Full data sheet for 16Mo3 → · Equivalent grades → · EN 10028-2 →