Material number 1.8974: S700MC
1.8974 is the European material number (Werkstoffnummer, EN 10027-2) for S700MC, thermomechanically rolled ultra-high-strength steel for cold forming specified in EN 10149-2.
Reading 1.8974 digit by digit
An EN 10027-2 number has the form 1.XXYY. The leading 1 marks it as steel. The pair 89 is the steel group, and for this number that group is steels for special applications. The final pair 74 is a sequential count inside that group and carries no meaning of its own — 1.8974 is simply the 74th entry registered there.
The group digits are the useful part. Reading 89 tells you what kind of steel you are looking at before you know anything else about it, and the 1 other number from group 89 held here are listed below.
1.8974 identity card
| Item | Value |
|---|---|
| Material number (EN 10027-2) | 1.8974 |
| Symbolic grade name | S700MC |
| Steel group | 89 — steels for special applications |
| Sequential number in group | 74 |
| Specified in | EN 10149-2 |
| Steel family | Structural steel |
| Yield, first condition in the table | 700 MPa (< 3 mm (A80)) |
| Tensile, same condition | 750–950 MPa |
| Cross-references held | 6 grades in 4 systems |
S700MC (1.8974): 700 MPa yield, 750–950 MPa tensile, 10–12 % elongation — EN 10149-2 thermomechanical grade for crane booms and trailer chassis. Chemistry (Nb/V/Ti/Mo/B), bend radii, welding rules, A1011 HSLAS Grade 80 and QStE690TM equivalents.
Full data sheet for S700MC → · Equivalent grades → · EN 10149-2 →
Group 89 — the neighbouring numbers
Same group digits, so the same broad class of steel. The sequential digits do not rank them.