--- title: "PN steel grades — 635 designations — Page 8" 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/8 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/pn/page/8.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:c027af9040f299d5fdec0c80cf0329d93185b97dd05e2af5b378a460cede7930 generated: 2026-09-21 --- > **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/8 > Canonical URL: https://steelequivalents.com/materials/pn/page/8 > 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 8 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 | |---|---|---|---|---| | [D70](/materials/pn/d70 "D70") | [1.1231](/materials/material-no/1.1231 "1.1231") | Spring steels | 0.65–0.73 | 18 | | [D80](/materials/pn/d80 "D80") | [1.0622](/materials/material-no/1.0622 "1.0622") | Others | 0.78–0.83 | 6 | | [D80A](/materials/pn/d80a "D80A") | [1.0622](/materials/material-no/1.0622 "1.0622") | Others | 0.78–0.83 | 6 | | [D85](/materials/pn/d85 "D85") | [1.1269](/materials/material-no/1.1269 "1.1269") | Spring steels | 0.8–0.9 | 14 | | [DUPLEX](/materials/pn/duplex "DUPLEX") | [1.4460](/materials/material-no/1.4460 "1.4460") | Stainless steels | ≤ 0.05 | 10 | | [G205](/materials/pn/g205 "G205") | [1.4845](/materials/material-no/1.4845 "1.4845") | Heat resistant steels | ≤ 0.1 | 21 | | [G355](/materials/pn/g355 "G355") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [G355](/materials/pn/g355 "G355") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [gat. 55](/materials/pn/gat-55 "gat. 55") | [1.1204](/materials/material-no/1.1204 "1.1204") | Others | 0.52–0.6 | 5 | | [gat. 55](/materials/pn/gat-55 "gat. 55") | [1.1203](/materials/material-no/1.1203 "1.1203") | Quenched and tempered steels | 0.52–0.6 | 15 | | [gat. 65](/materials/pn/gat-65 "gat. 65") | [1.1231](/materials/material-no/1.1231 "1.1231") | Spring steels | 0.65–0.73 | 18 | | [gat. 65](/materials/pn/gat-65 "gat. 65") | [1.1234](/materials/material-no/1.1234 "1.1234") | Others | 0.6–0.75 | 9 | | [gat. 65](/materials/pn/gat-65 "gat. 65") | [1.0603](/materials/material-no/1.0603 "1.0603") | Spring steels | 0.65–0.72 | 10 | | [gat. 65](/materials/pn/gat-65 "gat. 65") | [1.2007](/materials/material-no/1.2007 "1.2007") | Tool steels for cold work | 0.65–0.7 | 8 | | [gat. 85](/materials/pn/gat-85 "gat. 85") | [1.1269](/materials/material-no/1.1269 "1.1269") | Spring steels | 0.8–0.9 | 14 | | [gat. 85](/materials/pn/gat-85 "gat. 85") | [1.2004](/materials/material-no/1.2004 "1.2004") | Tool steels for cold work | 0.8–0.9 | 8 | | [H10S2M](/materials/pn/h10s2m "H10S2M") | [1.4731](/materials/material-no/1.4731 "1.4731") | Valve steels | 0.35–0.45 | 12 | | [H13JS](/materials/pn/h13js "H13JS") | [1.4724](/materials/material-no/1.4724 "1.4724") | Heat resistant steels | ≤ 0.12 | 15 | | [H16N36S2](/materials/pn/h16n36s2 "H16N36S2") | [1.4864](/materials/material-no/1.4864 "1.4864") | Heat resistant steels | ≤ 0.15 | 14 | | [H16N36S2](/materials/pn/h16n36s2 "H16N36S2") | [1.4886](/materials/material-no/1.4886 "1.4886") | Others | ≤ 0.15 | 11 | | [H16N36S2](/materials/pn/h16n36s2 "H16N36S2") | [1.4862](/materials/material-no/1.4862 "1.4862") | Heat resistant steels | ≤ 0.1 | 6 | | [H17](/materials/pn/h17 "H17") | [1.4016](/materials/material-no/1.4016 "1.4016") | Stainless steels | ≤ 0.08 | 18 | | [H17](/materials/pn/h17 "H17") | [1.4015](/materials/material-no/1.4015 "1.4015") | Others | ≤ 0.1 | 6 | | [H17N13M2T](/materials/pn/h17n13m2t "H17N13M2T") | [1.4573](/materials/material-no/1.4573 "1.4573") | Cast stainless steels | ≤ 0.04 | 12 | | [H17N13M2T](/materials/pn/h17n13m2t "H17N13M2T") | [1.4571](/materials/material-no/1.4571 "1.4571") | Stainless steels | ≤ 0.08 | 18 | | [H17N13M2T H18N10MT](/materials/pn/h17n13m2t-h18n10mt "H17N13M2T H18N10MT") | [1.4571](/materials/material-no/1.4571 "1.4571") | Stainless steels | ≤ 0.08 | 18 | | [H17N13M2T lub H18N10MT](/materials/pn/h17n13m2t-lub-h18n10mt "H17N13M2T lub H18N10MT") | [1.4571](/materials/material-no/1.4571 "1.4571") | Stainless steels | ≤ 0.08 | 18 | | [H17N14M2](/materials/pn/h17n14m2 "H17N14M2") | [1.4436](/materials/material-no/1.4436 "1.4436") | Stainless steels | ≤ 0.05 | 19 | | [H17N2](/materials/pn/h17n2 "H17N2") | [1.4057](/materials/material-no/1.4057 "1.4057") | Stainless steels | 0.12–0.22 | 17 | | [H17N2A](/materials/pn/h17n2a "H17N2A") | [1.4057](/materials/material-no/1.4057 "1.4057") | Stainless steels | 0.12–0.22 | 17 | | [H18](/materials/pn/h18 "H18") | [1.4125](/materials/material-no/1.4125 "1.4125") | Stainless steels | 0.95–1.2 | 11 | | [H18](/materials/pn/h18 "H18") | [1.4112](/materials/material-no/1.4112 "1.4112") | Stainless steels | 0.85–0.95 | 13 | | [H18](/materials/pn/h18 "H18") | [1.3543](/materials/material-no/1.3543 "1.3543") | Bearing steels | 0.95–1.2 | 6 | | [H18](/materials/pn/h18 "H18") | [1.4528](/materials/material-no/1.4528 "1.4528") | Stainless steels | 1–1.1 | 5 | | [H18](/materials/pn/h18 "H18") | [1.4109](/materials/material-no/1.4109 "1.4109") | Stainless steels | 0.6–0.75 | 10 | | [H18JS](/materials/pn/h18js "H18JS") | [1.4742](/materials/material-no/1.4742 "1.4742") | Heat resistant steels | ≤ 0.12 | 17 | | [H18N10MT](/materials/pn/h18n10mt "H18N10MT") | [1.4571](/materials/material-no/1.4571 "1.4571") | Stainless steels | ≤ 0.08 | 18 | | [H18N9S](/materials/pn/h18n9s "H18N9S") | [1.4828](/materials/material-no/1.4828 "1.4828") | Heat resistant steels | ≤ 0.2 | 20 | | [H18N9S](/materials/pn/h18n9s "H18N9S") | [1.4833](/materials/material-no/1.4833 "1.4833") | Heat resistant steels | ≤ 0.15 | 15 | | [H20N12S2](/materials/pn/h20n12s2 "H20N12S2") | [1.4828](/materials/material-no/1.4828 "1.4828") | Heat resistant steels | ≤ 0.2 | 20 | | [H20N12S2](/materials/pn/h20n12s2 "H20N12S2") | [1.4833](/materials/material-no/1.4833 "1.4833") | Heat resistant steels | ≤ 0.15 | 15 | | [H23N13](/materials/pn/h23n13 "H23N13") | [1.4833](/materials/material-no/1.4833 "1.4833") | Heat resistant steels | ≤ 0.15 | 15 | | [H23N13](/materials/pn/h23n13 "H23N13") | [1.4829](/materials/material-no/1.4829 "1.4829") | Others | ≤ 0.14 | 8 | | [H23N18](/materials/pn/h23n18 "H23N18") | [1.4845](/materials/material-no/1.4845 "1.4845") | Heat resistant steels | ≤ 0.1 | 21 | | [H23N18](/materials/pn/h23n18 "H23N18") | [1.4843](/materials/material-no/1.4843 "1.4843") | Resistance heating alloys | ≤ 0.2 | 9 | | [H24JS](/materials/pn/h24js "H24JS") | [1.4762](/materials/material-no/1.4762 "1.4762") | Heat resistant steels | ≤ 0.12 | 12 | | [H25](/materials/pn/h25 "H25") | [1.4746](/materials/material-no/1.4746 "1.4746") | Others | ≤ 0.12 | 8 | | [H25](/materials/pn/h25 "H25") | [1.4749](/materials/material-no/1.4749 "1.4749") | Heat resistant steels | 0.15–0.2 | 10 | | [H25N20S2](/materials/pn/h25n20s2 "H25N20S2") | [1.4845](/materials/material-no/1.4845 "1.4845") | Heat resistant steels | ≤ 0.1 | 21 | | [H25N20S2](/materials/pn/h25n20s2 "H25N20S2") | [1.4841](/materials/material-no/1.4841 "1.4841") | Heat resistant steels | ≤ 0.2 | 17 | **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/7 "Previous") Page 8 of 13[Next](/materials/pn/page/9 "Next")