--- title: "STAS steel grades — 203 designations — Page 4" description: "Steel grades designated under STAS, with chemical composition, mechanical properties and equivalents in other standards. 203 designations across 142…" canonical: https://steelequivalents.com/materials/stas/page/4 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/stas/page/4.md cs: https://steelequivalents.com/cs/materiály/stas.md de: https://steelequivalents.com/de/werkstoffe/stas.md es: https://steelequivalents.com/es/materiales/stas.md fr: https://steelequivalents.com/fr/matériaux/stas.md hu: https://steelequivalents.com/hu/anyagok/stas.md it: https://steelequivalents.com/it/materiali/stas.md nl: https://steelequivalents.com/nl/materialen/stas.md pl: https://steelequivalents.com/pl/materiały/stas.md pt: https://steelequivalents.com/pt/materiais/stas.md ru: https://steelequivalents.com/ru/материалы/stas.md tr: https://steelequivalents.com/tr/malzemeler/stas.md zh: https://steelequivalents.com/zh/材料/stas.md ja: https://steelequivalents.com/ja/材料/stas.md ar: https://steelequivalents.com/ar/المواد/stas.md ko: https://steelequivalents.com/ko/재료/stas.md pt-br: https://steelequivalents.com/pt-br/materiais/stas.md hi: https://steelequivalents.com/hi/सामग्री/stas.md content_hash: sha256:7494d82a471752796dc397efd1ae12070a72f7d62399b7c0e91b7d1281d84144 generated: 2026-09-22 --- > **Machine-readable Markdown rendering.** This is a Markdown representation of a web page, > served for AI agents and crawlers as a token-efficient alternative to the full HTML. > Full interactive HTML version: https://steelequivalents.com/materials/stas/page/4 > Canonical URL: https://steelequivalents.com/materials/stas/page/4 > Available languages: en, cs, de, es, fr, hu, it, nl, pl, pt, ru, tr, zh, ja, ar, ko, pt-br, hi > Change detection: `content_hash` is the SHA-256 of this document's Markdown body — everything > below this block, whitespace-trimmed, excluding the front-matter. Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. STAS · 203 grades # STAS steel grades — 203 designations — Page 4 Every grade designated under STAS, 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. Every name on this page is an indicative cross-reference, not an asserted identity: the grades are close, not interchangeable. Check the composition before you substitute. ## Also known as 203 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [OLC50X](/materials/stas/olc50x "OLC50X") | [1.1206](/materials/material-no/1.1206 "1.1206") | Quenched and tempered steels | 0.47–0.55 | 17 | | [OLC50X](/materials/stas/olc50x "OLC50X") | [1.1210](/materials/material-no/1.1210 "1.1210") | Steels for surface hardening | 0.5–0.57 | 8 | | [OLC55](/materials/stas/olc55 "OLC55") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [OLC55A](/materials/stas/olc55a "OLC55A") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [OLC55X](/materials/stas/olc55x "OLC55X") | [1.0535](/materials/material-no/1.0535 "1.0535") | Quenched and tempered steels | 0.52–0.6 | 21 | | [OLC60](/materials/stas/olc60 "OLC60") | [1.0601](/materials/material-no/1.0601 "1.0601") | Quenched and tempered steels | 0.57–0.65 | 25 | | [OLC60AT](/materials/stas/olc60at "OLC60AT") | [1.0601](/materials/material-no/1.0601 "1.0601") | Quenched and tempered steels | 0.57–0.65 | 25 | | [OLC60X](/materials/stas/olc60x "OLC60X") | [1.0601](/materials/material-no/1.0601 "1.0601") | Quenched and tempered steels | 0.57–0.65 | 25 | | [OLC65A](/materials/stas/olc65a "OLC65A") | [1.0612](/materials/material-no/1.0612 "1.0612") | Others | 0.63–0.68 | 12 | | [OLC66S](/materials/stas/olc66s "OLC66S") | [1.1231](/materials/material-no/1.1231 "1.1231") | Spring steels | 0.65–0.73 | 18 | | [OLC70A](/materials/stas/olc70a "OLC70A") | [1.1231](/materials/material-no/1.1231 "1.1231") | Spring steels | 0.65–0.73 | 18 | | [OLC85A](/materials/stas/olc85a "OLC85A") | [1.1269](/materials/material-no/1.1269 "1.1269") | Spring steels | 0.8–0.9 | 14 | | [OSC 10](/materials/stas/osc10 "OSC 10") | [1.1274](/materials/material-no/1.1274 "1.1274") | Spring steels | 0.95–1.05 | 13 | | [OSC 8M](/materials/stas/osc-8m "OSC 8M") | [1.1535](/materials/material-no/1.1535 "1.1535") | Unalloyed tool steels / carbon steels | 0.85–0.95 | 14 | | [OSC 8M](/materials/stas/osc-8m "OSC 8M") | [1.1830](/materials/material-no/1.1830 "1.1830") | Unalloyed tool steels / carbon steels | 0.8–0.9 | 10 | | [OSC10](/materials/stas/osc10 "OSC10") | [1.1645](/materials/material-no/1.1645 "1.1645") | Unalloyed tool steels / carbon steels | 1–1.1 | 18 | | [OSC10](/materials/stas/osc10 "OSC10") | [1.1545](/materials/material-no/1.1545 "1.1545") | Unalloyed tool steels / carbon steels | 1–1.1 | 19 | | [OSC11](/materials/stas/osc11 "OSC11") | [1.1545](/materials/material-no/1.1545 "1.1545") | Unalloyed tool steels / carbon steels | 1–1.1 | 19 | | [OSC7](/materials/stas/osc7 "OSC7") | [1.1620](/materials/material-no/1.1620 "1.1620") | Unalloyed tool steels / carbon steels | 0.65–0.74 | 14 | | [OSC8](/materials/stas/osc8 "OSC8") | [1.1525](/materials/material-no/1.1525 "1.1525") | Unalloyed tool steels / carbon steels | 0.75–0.85 | 20 | | [OSC8](/materials/stas/osc8 "OSC8") | [1.1625](/materials/material-no/1.1625 "1.1625") | Unalloyed tool steels / carbon steels | 0.75–0.85 | 15 | | [OT400-1](/materials/stas/ot400-1 "OT400-1") | [1.0416](/materials/material-no/1.0416 "1.0416") | Others | 0.15–0.2 | 17 | | [OT400-3](/materials/stas/ot400-3 "OT400-3") | [1.0416](/materials/material-no/1.0416 "1.0416") | Others | 0.15–0.2 | 17 | | [OT450-3](/materials/stas/ot450-3 "OT450-3") | [1.0443](/materials/material-no/1.0443 "1.0443") | Others | ≤ 0.11 | 13 | | [OT500-1](/materials/stas/ot500-1 "OT500-1") | [1.0552](/materials/material-no/1.0552 "1.0552") | Others | ≤ 0.25 | 13 | | [OT500-3](/materials/stas/ot500-3 "OT500-3") | [1.0552](/materials/material-no/1.0552 "1.0552") | Others | ≤ 0.25 | 13 | | [Rp3](/materials/stas/rp3 "Rp3") | [1.3355](/materials/material-no/1.3355 "1.3355") | High-speed steels | 0.73–0.83 | 22 | | [Rp5](/materials/stas/rp5 "Rp5") | [1.3343](/materials/material-no/1.3343 "1.3343") | High-speed steels | 0.86–0.94 | 19 | | [RUL1](/materials/stas/rul1 "RUL1") | [1.3505](/materials/material-no/1.3505 "1.3505") | Bearing steels | 0.93–1.05 | 22 | | [RUL1v](/materials/stas/rul1v "RUL1v") | [1.3505](/materials/material-no/1.3505 "1.3505") | Bearing steels | 0.93–1.05 | 22 | | [RUL2](/materials/stas/rul2 "RUL2") | [1.3520](/materials/material-no/1.3520 "1.3520") | Bearing steels | 0.93–1.05 | 16 | | [RUL2v](/materials/stas/rul2v "RUL2v") | [1.3520](/materials/material-no/1.3520 "1.3520") | Bearing steels | 0.93–1.05 | 16 | | [T 30Mn14R](/materials/stas/t30mn14r "T 30Mn14R") | [1.5531](/materials/material-no/1.5531 "1.5531") | Quenched and tempered steels | 0.27–0.33 | 5 | | [T 30Mn14R](/materials/stas/t30mn14r "T 30Mn14R") | [1.5526](/materials/material-no/1.5526 "1.5526") | Others | 0.27–0.32 | 5 | | [T105Mn120](/materials/stas/t105mn120 "T105Mn120") | [1.3401](/materials/material-no/1.3401 "1.3401") | Quenched and tempered steels | 1.1–1.3 | 19 | | [T12TiMoNiCr175](/materials/stas/t12timonicr175 "T12TiMoNiCr175") | [1.4581](/materials/material-no/1.4581 "1.4581") | Cast stainless steels | ≤ 0.07 | 9 | | [T130Mn135](/materials/stas/t130mn135 "T130Mn135") | [1.3401](/materials/material-no/1.3401 "1.3401") | Quenched and tempered steels | 1.1–1.3 | 19 | | [T15Cr130](/materials/stas/t15cr130 "T15Cr130") | [1.4006](/materials/material-no/1.4006 "1.4006") | Stainless steels | 0.08–0.15 | 26 | | [T15NiCr180](/materials/stas/t15nicr180 "T15NiCr180") | [1.4312](/materials/material-no/1.4312 "1.4312") | Cast stainless steels | ≤ 0.12 | 15 | | [T15TiNiCr180](/materials/stas/t15tinicr180 "T15TiNiCr180") | [1.4312](/materials/material-no/1.4312 "1.4312") | Cast stainless steels | ≤ 0.12 | 15 | | [T20Cr130](/materials/stas/t20cr130 "T20Cr130") | [1.4027](/materials/material-no/1.4027 "1.4027") | Cast stainless steels | 0.16–0.23 | 14 | | [T20Mn14](/materials/stas/t20mn14 "T20Mn14") | [1.1120](/materials/material-no/1.1120 "1.1120") | Others | 0.17–0.23 | 13 | | [T30CrMo3](/materials/stas/t30crmo3 "T30CrMo3") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [T30CrMo3](/materials/stas/t30crmo3 "T30CrMo3") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [T30Mn14R](/materials/stas/t30mn14r "T30Mn14R") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [T30MoCrNi14](/materials/stas/t30mocrni14 "T30MoCrNi14") | [1.6582](/materials/material-no/1.6582 "1.6582") | Quenched and tempered steels | 0.3–0.38 | 25 | | [T30SiMn12](/materials/stas/t30simn12 "T30SiMn12") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [T34MoCr09](/materials/stas/t34mocr09 "T34MoCr09") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [T35Mn14](/materials/stas/t35mn14 "T35Mn14") | [1.1167](/materials/material-no/1.1167 "1.1167") | Quenched and tempered steels | 0.32–0.4 | 17 | | [T35MoCrNi08](/materials/stas/t35mocrni08 "T35MoCrNi08") | [1.6511](/materials/material-no/1.6511 "1.6511") | Quenched and tempered steels | 0.32–0.4 | 18 | **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. [Previous](/materials/stas/page/3 "Previous") Page 4 of 5[Next](/materials/stas/page/5 "Next")