--- title: "PN steel grades — 635 designations — Page 12" description: "Steel grades designated under PN, with chemical composition, mechanical properties and equivalents in other standards. 635 designations across 371…" canonical: https://steelequivalents.com/materials/pn/page/12 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/pn/page/12.md cs: https://steelequivalents.com/cs/materiály/pn.md de: https://steelequivalents.com/de/werkstoffe/pn.md es: https://steelequivalents.com/es/materiales/pn.md fr: https://steelequivalents.com/fr/matériaux/pn.md hu: https://steelequivalents.com/hu/anyagok/pn.md it: https://steelequivalents.com/it/materiali/pn.md nl: https://steelequivalents.com/nl/materialen/pn.md pl: https://steelequivalents.com/pl/materiały/pn.md pt: https://steelequivalents.com/pt/materiais/pn.md ru: https://steelequivalents.com/ru/материалы/pn.md tr: https://steelequivalents.com/tr/malzemeler/pn.md zh: https://steelequivalents.com/zh/材料/pn.md ja: https://steelequivalents.com/ja/材料/pn.md ar: https://steelequivalents.com/ar/المواد/pn.md ko: https://steelequivalents.com/ko/재료/pn.md pt-br: https://steelequivalents.com/pt-br/materiais/pn.md hi: https://steelequivalents.com/hi/सामग्री/pn.md content_hash: sha256:070c01fcaa77f7d31566492b4a185777dcd9f6d9261af41a24acb61abf6be2f5 generated: 2026-09-24 --- > **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/pn/page/12 > Canonical URL: https://steelequivalents.com/materials/pn/page/12 > 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. PN · 635 grades # PN steel grades — 635 designations — Page 12 Every grade designated under PN, 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 635 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [St3W](/materials/pn/st3w "St3W") | [1.0114](/materials/material-no/1.0114 "1.0114") | Unalloyed structural steels | ≤ 0.17 | 21 | | [St3W](/materials/pn/st3w "St3W") | [1.0116](/materials/material-no/1.0116 "1.0116") | Unalloyed structural steels | ≤ 0.17 | 12 | | [St41K](/materials/pn/st41k "St41K") | [1.0426](/materials/material-no/1.0426 "1.0426") | Aging resistant steels | 0.08–0.2 | 17 | | [St41K](/materials/pn/st41k "St41K") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [St41K](/materials/pn/st41k "St41K") | [1.0460](/materials/material-no/1.0460 "1.0460") | Heat-resistant structural steels | 0.18–0.23 | 4 | | [St41K](/materials/pn/st41k "St41K") | [1.8945](/materials/material-no/1.8945 "1.8945") | Weathering steels | ≤ 0.12 | 16 | | [St44K](/materials/pn/st44k "St44K") | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [St44K](/materials/pn/st44k "St44K") | [1.0460](/materials/material-no/1.0460 "1.0460") | Heat-resistant structural steels | 0.18–0.23 | 4 | | [St44K](/materials/pn/st44k "St44K") | [1.0425](/materials/material-no/1.0425 "1.0425") | Heat-resistant structural steels | ≤ 0.2 | 20 | | [St4S](/materials/pn/st4s "St4S") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [St4SV](/materials/pn/st4sv "St4SV") | [1.0179](/materials/material-no/1.0179 "1.0179") | Unalloyed structural steels | ≤ 0.21 | 2 | | [St4SW](/materials/pn/st4sw "St4SW") | [1.0144](/materials/material-no/1.0144 "1.0144") | Unalloyed structural steels | ≤ 0.18 | 22 | | [St4SX](/materials/pn/st4sx "St4SX") | [1.0144](/materials/material-no/1.0144 "1.0144") | Unalloyed structural steels | ≤ 0.18 | 22 | | [St4SY](/materials/pn/st4sy "St4SY") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [St4V](/materials/pn/st4v "St4V") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [St4VY](/materials/pn/st4vy "St4VY") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [St4W](/materials/pn/st4w "St4W") | [1.0143](/materials/material-no/1.0143 "1.0143") | Unalloyed structural steels | ≤ 0.18 | 16 | | [St5](/materials/pn/st5 "St5") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [St5](/materials/pn/st5 "St5") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [St6](/materials/pn/st6 "St6") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [St6](/materials/pn/st6 "St6") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [St7](/materials/pn/st7 "St7") | [1.0070](/materials/material-no/1.0070 "1.0070") | Unalloyed structural steels | — | 16 | | [St7](/materials/pn/st7 "St7") | [1.0070](/materials/material-no/1.0070 "1.0070") | Unalloyed structural steels | — | 16 | | [stal narzędziowa węglowa](/materials/pn/stal-narzedziowa-weglowa "stal narzędziowa węglowa") | [1.1730](/materials/material-no/1.1730 "1.1730") | Unalloyed tool steels / carbon steels | 0.42–0.5 | 14 | | [stal niklowa](/materials/pn/stal-niklowa "stal niklowa") | [1.2767](/materials/material-no/1.2767 "1.2767") | Tool steels for cold work | 0.4–0.5 | 9 | | [stal srebrna](/materials/pn/stal-srebrna "stal srebrna") | [1.2210](/materials/material-no/1.2210 "1.2210") | Tool steels for cold work | 1.1–1.25 | 13 | | [stal węglowa](/materials/pn/stal-weglowa "stal węglowa") | [1.1545](/materials/material-no/1.1545 "1.1545") | Unalloyed tool steels / carbon steels | 1–1.1 | 19 | | [SW12](/materials/pn/sw12 "SW12") | [1.3318](/materials/material-no/1.3318 "1.3318") | High-speed steels | 0.9–1 | 4 | | [SW18](/materials/pn/sw18 "SW18") | [1.3355](/materials/material-no/1.3355 "1.3355") | High-speed steels | 0.73–0.83 | 22 | | [SW7M](/materials/pn/sw7m "SW7M") | [1.3343](/materials/material-no/1.3343 "1.3343") | High-speed steels | 0.86–0.94 | 19 | | [SW7M](/materials/pn/sw7m "SW7M") | [1.3339](/materials/material-no/1.3339 "1.3339") | High-speed steels | 0.8–0.88 | 16 | | [WCL](/materials/pn/wcl "WCL") | [1.2343](/materials/material-no/1.2343 "1.2343") | Tool steels for hot work | 0.33–0.41 | 20 | | [WCL](/materials/pn/wcl "WCL") | [1.2344](/materials/material-no/1.2344 "1.2344") | Tool steels for hot work | 0.35–0.42 | 20 | | [WCLV](/materials/pn/wclv "WCLV") | [1.2344](/materials/material-no/1.2344 "1.2344") | Tool steels for hot work | 0.35–0.42 | 20 | | [WCLV](/materials/pn/wclv "WCLV") | [1.2343](/materials/material-no/1.2343 "1.2343") | Tool steels for hot work | 0.33–0.41 | 20 | | [WLK](/materials/pn/wlk "WLK") | [1.2885](/materials/material-no/1.2885 "1.2885") | Tool steels for hot work | 0.28–0.35 | 6 | | [WLV](/materials/pn/wlv "WLV") | [1.2365](/materials/material-no/1.2365 "1.2365") | Tool steels for hot work | 0.28–0.35 | 18 | | [WNL](/materials/pn/wnl "WNL") | [1.2711](/materials/material-no/1.2711 "1.2711") | Tool steels for cold work | 0.5–0.6 | 16 | | [WNL](/materials/pn/wnl "WNL") | [1.2713](/materials/material-no/1.2713 "1.2713") | Tool steels for cold work | 0.5–0.6 | 12 | | [WNL](/materials/pn/wnl "WNL") | [1.2714](/materials/material-no/1.2714 "1.2714") | Tool steels for hot work | 0.5–0.6 | 15 | | [WNL1](/materials/pn/wnl1 "WNL1") | [1.2711](/materials/material-no/1.2711 "1.2711") | Tool steels for cold work | 0.5–0.6 | 16 | | [WNL1](/materials/pn/wnl1 "WNL1") | [1.2713](/materials/material-no/1.2713 "1.2713") | Tool steels for cold work | 0.5–0.6 | 12 | | [WNL1](/materials/pn/wnl1 "WNL1") | [1.2714](/materials/material-no/1.2714 "1.2714") | Tool steels for hot work | 0.5–0.6 | 15 | | [WNLV](/materials/pn/wnlv "WNLV") | [1.2714](/materials/material-no/1.2714 "1.2714") | Tool steels for hot work | 0.5–0.6 | 15 | | [WNLV](/materials/pn/wnlv "WNLV") | [1.2713](/materials/material-no/1.2713 "1.2713") | Tool steels for cold work | 0.5–0.6 | 12 | | [WWS](/materials/pn/wws "WWS") | [1.2567](/materials/material-no/1.2567 "1.2567") | Tool steels for hot work | 0.25–0.35 | 9 | | [WWS1](/materials/pn/wws1 "WWS1") | [1.2567](/materials/material-no/1.2567 "1.2567") | Tool steels for hot work | 0.25–0.35 | 9 | | [WWV](/materials/pn/wwv "WWV") | [1.2581](/materials/material-no/1.2581 "1.2581") | Tool steels for hot work | 0.25–0.35 | 18 | | [WWW](/materials/pn/www "WWW") | [1.2581](/materials/material-no/1.2581 "1.2581") | Tool steels for hot work | 0.25–0.35 | 18 | | [X10CrMoVNb91](/materials/din-en/x10crmovnb9-1 "X10CrMoVNb91") | [1.4903](/materials/material-no/1.4903 "1.4903") | High-temperature steels | 0.08–0.12 | 4 | **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/pn/page/11 "Previous") Page 12 of 13[Next](/materials/pn/page/13 "Next")