JIS steel grades — 2322 designations — Page 32
Every grade designated under JIS, with the material number it maps to, what kind of steel it is, its carbon window and how many other standards carry it. Open a grade for its full composition, properties and its designations in other standards. Unless marked, every name here is an indicative cross-reference, not an asserted identity — the grades are close, not interchangeable. 10 of 50 rows differ and carry a “This grade’s own name” mark.
Also known as
2322 designations| Grade | Material no. | Category | C% by weight | Also inother standards |
|---|---|---|---|---|
| SUM 21 | 1.0715 | Free cutting steels | ≤ 0.14 | 14 |
| SUM11 This grade’s own name | — | Free cutting steels | 0.08–0.13 | 1 |
| SUM12 This grade’s own name | — | Free cutting steels | 0.08–0.13 | 1 |
| SUM21 | 1.0711 | Free cutting steels | ≤ 0.12 | 6 |
| SUM21 | 1.0721 | Free cutting steels | 0.07–0.13 | 15 |
| SUM21 | — | — | ≤ 0.09 | 3 |
| SUM22 | 1.0715 | Free cutting steels | ≤ 0.14 | 14 |
| SUM22L | 1.0718 | Free cutting steels | ≤ 0.14 | 11 |
| SUM23 | 1.0715 | Free cutting steels | ≤ 0.14 | 14 |
| SUM23 | 1.0736 | Free cutting steels | ≤ 0.14 | 11 |
| SUM23 | 1.9704 | Free cutting steels | ≤ 0.09 | 3 |
| SUM23 | — | — | ≤ 0.09 | 3 |
| SUM23L This grade’s own name | — | Free cutting steels | ≤ 0.09 | 1 |
| SUM24L | 1.0718 | Free cutting steels | ≤ 0.14 | 11 |
| SUM25 | 1.0736 | Free cutting steels | ≤ 0.14 | 11 |
| SUM31 | 1.0710 | Free cutting steels | 0.12–0.18 | 5 |
| SUM31L This grade’s own name | — | Free cutting steels | 0.14–0.2 | 1 |
| SUM32 This grade’s own name | — | Free cutting steels | 0.12–0.2 | 1 |
| SUM4 | 1.0726 | Free cutting steels | 0.32–0.39 | 15 |
| SUM41 | 1.0764 | Free cutting steels | 0.32–0.39 | 4 |
| SUM41 | 1.9737 | Others | 0.32–0.39 | 3 |
| SUM41 | 1.1167 | Quenched and tempered steels | 0.32–0.4 | 17 |
| SUM42 This grade’s own name | — | Free cutting steels | 0.37–0.45 | 1 |
| SUM42 | 1.0762 | Free cutting steels | 0.4–0.48 | 20 |
| SUM43 | 1.0762 | Free cutting steels | 0.4–0.48 | 20 |
| SUN21 | 1.4742 | Heat resistant steels | ≤ 0.12 | 17 |
| SUN446 | 1.4746 | Others | ≤ 0.12 | 8 |
| SUP 4 | 1.1274 | Spring steels | 0.95–1.05 | 13 |
| SUP10 | 1.8159 | Quenched and tempered steels | 0.47–0.55 | 27 |
| SUP10 | 1.2241 | Tool steels for cold work | 0.47–0.55 | 9 |
| SUP10-CSP This grade’s own name | — | Spring steels | 0.47–0.55 | 1 |
| SUP10-CSP | 1.8159 | Quenched and tempered steels | 0.47–0.55 | 27 |
| SUP10M This grade’s own name | — | — | 0.47–0.55 | 1 |
| SUP11A | 1.7138 | Spring steels | 0.48–0.55 | 4 |
| SUP11A | 1.7190 | Spring steels | 0.58 | 7 |
| SUP12 | 1.7102 | Spring steels | 0.51–0.59 | 14 |
| SUP13 | 1.7241 | Others | 0.56–0.64 | 4 |
| SUP13 | — | — | 0.56–0.64 | 3 |
| SUP2 | 1.0612 | Others | 0.63–0.68 | 12 |
| SUP3 | 1.1269 | Spring steels | 0.8–0.9 | 14 |
| SUP3 | 1.0622 | Others | 0.78–0.83 | 6 |
| SUP4 | 1.1545 | Unalloyed tool steels / carbon steels | 1–1.1 | 19 |
| SUP4 | 1.0616 | Spring steels | 0.83–0.88 | 8 |
| SUP6 This grade’s own name | — | Spring steels | 0.56–0.64 | — |
| SUP6 | 1.0961 | High-strength multi-phase steels | ≤ 0.18 | 14 |
| SUP6 | 1.2826 | Tool steels for cold work | 0.58–0.65 | 9 |
| SUP6 | 1.5028 | Spring steels | 0.6–0.7 | 11 |
| SUP6 | 1.5027 | Spring steels | 0.56–0.64 | 11 |
| SUP6M This grade’s own name | — | — | 0.56–0.64 | 1 |
| SUP7 | 1.5027 | Spring steels | 0.56–0.64 | 11 |
This grade’s own name — recorded in our sources as this grade’s own designation under that standard.
Indicative — taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering.
Withdrawn — designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.