--- title: "PN steel grades — 635 designations — Page 4" 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/4 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/pn/page/4.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: sha256:52aaa9458bb5341d1c7262ddfe23fb617179482a3eae0aea3b252d418b13ae8e 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/4 > Canonical URL: https://steelequivalents.com/materials/pn/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. PN · 635 grades # PN steel grades — 635 designations — Page 4 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 | |---|---|---|---|---| | [20HG](/materials/pn/20hg "20HG") | [1.7147](/materials/material-no/1.7147 "1.7147") | Case hardening steels | 0.17–0.22 | 15 | | [20HG](/materials/pn/20hg "20HG") | [1.7139](/materials/material-no/1.7139 "1.7139") | Case hardening steels | 0.14–0.19 | 11 | | [20HG](/materials/pn/20hg "20HG") | [1.7149](/materials/material-no/1.7149 "1.7149") | Case hardening steels | 0.17–0.22 | 8 | | [20HG](/materials/pn/20hg "20HG") | [1.2162](/materials/material-no/1.2162 "1.2162") | Tool steels for cold work | 0.18–0.24 | 7 | | [20HM](/materials/pn/20hm "20HM") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [20HM](/materials/pn/20hm "20HM") | [1.7350](/materials/material-no/1.7350 "1.7350") | Heat-resistant structural steels | 0.19–0.26 | 2 | | [20HM](/materials/pn/20hm "20HM") | [1.3567](/materials/material-no/1.3567 "1.3567") | Others | 0.17–0.23 | 7 | | [20HMFTB](/materials/pn/20hmftb "20HMFTB") | [1.7729](/materials/material-no/1.7729 "1.7729") | Others | 0.17–0.23 | 3 | | [20HN3A](/materials/pn/20hn3a "20HN3A") | [1.5919](/materials/material-no/1.5919 "1.5919") | Case hardening steels | 0.12–0.18 | 11 | | [20HNM](/materials/pn/20hnm "20HNM") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [20HNM](/materials/pn/20hnm "20HNM") | [1.6522](/materials/material-no/1.6522 "1.6522") | Case hardening steels | 0.17–0.23 | 6 | | [20HNM](/materials/pn/20hnm "20HNM") | [1.6526](/materials/material-no/1.6526 "1.6526") | Case hardening steels | 0.17–0.23 | 9 | | [20HNMA](/materials/pn/20hnma "20HNMA") | [1.6523](/materials/material-no/1.6523 "1.6523") | Case hardening steels | 0.17–0.23 | 18 | | [21HMF](/materials/pn/21hmf "21HMF") | [1.8070](/materials/material-no/1.8070 "1.8070") | Heat-resistant structural steels | 0.17–0.25 | 4 | | [21HMF](/materials/pn/21hmf "21HMF") | [1.7709](/materials/material-no/1.7709 "1.7709") | Heat-resistant structural steels | 0.17–0.25 | 6 | | [22HNM](/materials/pn/22hnm "22HNM") | [1.6543](/materials/material-no/1.6543 "1.6543") | Case hardening steels | 0.18–0.23 | 3 | | [23G2NMHA](/materials/pn/23g2nmha "23G2NMHA") | [1.6541](/materials/material-no/1.6541 "1.6541") | Quenched and tempered steels | 0.2–0.26 | 3 | | [23G2NMHA](/materials/pn/23g2nmha "23G2NMHA") | [1.6540](/materials/material-no/1.6540 "1.6540") | Others | 0.2–0.26 | 4 | | [23G2NMHA](/materials/pn/23g2nmha "23G2NMHA") | [1.6758](/materials/material-no/1.6758 "1.6758") | Quenched and tempered steels | 0.2–0.26 | 3 | | [23H12MNF](/materials/pn/23h12mnf "23H12MNF") | [1.4923](/materials/material-no/1.4923 "1.4923") | High-temperature steels | 0.18–0.24 | 5 | | [23H2MF](/materials/pn/23h2mf "23H2MF") | [1.7733](/materials/material-no/1.7733 "1.7733") | Heat-resistant structural steels | 0.2–0.28 | 15 | | [24H2MF](/materials/pn/24h2mf "24H2MF") | [1.7733](/materials/material-no/1.7733 "1.7733") | Heat-resistant structural steels | 0.2–0.28 | 15 | | [25](/materials/gost/25 "25") | [1.1133](/materials/material-no/1.1133 "1.1133") | Quenched and tempered steels | 0.17–0.23 | 20 | | [25](/materials/gost/25 "25") | [1.0406](/materials/material-no/1.0406 "1.0406") | Quenched and tempered steels | 0.22–0.29 | 20 | | [25H3M](/materials/pn/25h3m "25H3M") | [1.8515](/materials/material-no/1.8515 "1.8515") | Nitriding steels | 0.28–0.35 | 8 | | [25H3M](/materials/pn/25h3m "25H3M") | [1.7361](/materials/material-no/1.7361 "1.7361") | Quenched and tempered steels | 0.28–0.35 | 7 | | [25HM](/materials/pn/25hm "25HM") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [25HM](/materials/pn/25hm "25HM") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [25HM](/materials/pn/25hm "25HM") | [1.3567](/materials/material-no/1.3567 "1.3567") | Others | 0.17–0.23 | 7 | | [26H2MF](/materials/pn/26h2mf "26H2MF") | [1.7733](/materials/material-no/1.7733 "1.7733") | Heat-resistant structural steels | 0.2–0.28 | 15 | | [26HM](/materials/pn/26hm "26HM") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [2H13](/materials/pn/2h13 "2H13") | [1.4021](/materials/material-no/1.4021 "1.4021") | Stainless steels | 0.16–0.25 | 18 | | [2H13](/materials/pn/2h13 "2H13") | [1.4006](/materials/material-no/1.4006 "1.4006") | Stainless steels | 0.08–0.15 | 26 | | [2H14](/materials/pn/2h14 "2H14") | [1.4021](/materials/material-no/1.4021 "1.4021") | Stainless steels | 0.16–0.25 | 18 | | [2H17N2](/materials/pn/2h17n2 "2H17N2") | [1.4057](/materials/material-no/1.4057 "1.4057") | Stainless steels | 0.12–0.22 | 17 | | [30](/materials/pn/30 "30") | [1.0528](/materials/material-no/1.0528 "1.0528") | Quenched and tempered steels | 0.27–0.34 | 14 | | [30A](/materials/pn/30a "30A") | [1.0528](/materials/material-no/1.0528 "1.0528") | Quenched and tempered steels | 0.27–0.34 | 14 | | [30G2](/materials/bds/30g2 "30G2") | [1.5531](/materials/material-no/1.5531 "1.5531") | Quenched and tempered steels | 0.27–0.33 | 5 | | [30G2](/materials/bds/30g2 "30G2") | [1.5526](/materials/material-no/1.5526 "1.5526") | Others | 0.27–0.32 | 5 | | [30G2](/materials/bds/30g2 "30G2") | [1.1170](/materials/material-no/1.1170 "1.1170") | Quenched and tempered steels | 0.25–0.32 | 16 | | [30G2](/materials/bds/30g2 "30G2") | [1.1165](/materials/material-no/1.1165 "1.1165") | Quenched and tempered steels | 0.25–0.32 | 16 | | [30H](/materials/pn/30h "30H") | [1.7030](/materials/material-no/1.7030 "1.7030") | Quenched and tempered steels | 0.24–0.31 | 12 | | [30H](/materials/pn/30h "30H") | [1.7033](/materials/material-no/1.7033 "1.7033") | Quenched and tempered steels | 0.3–0.37 | 18 | | [30H2MF](/materials/pn/30h2mf "30H2MF") | [1.7707](/materials/material-no/1.7707 "1.7707") | Quenched and tempered steels | 0.26–0.34 | 8 | | [30H2MF](/materials/pn/30h2mf "30H2MF") | [1.8519](/materials/material-no/1.8519 "1.8519") | Nitriding steels | 0.27–0.34 | 5 | | [30H2N2A](/materials/pn/30h2n2a "30H2N2A") | [1.6580](/materials/material-no/1.6580 "1.6580") | Quenched and tempered steels | 0.26–0.34 | 15 | | [30H2N2M](/materials/pn/30h2n2m "30H2N2M") | [1.6580](/materials/material-no/1.6580 "1.6580") | Quenched and tempered steels | 0.26–0.34 | 15 | | [30HM](/materials/pn/30hm "30HM") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [30rs](/materials/pn/30rs "30rs") | [1.0528](/materials/material-no/1.0528 "1.0528") | Quenched and tempered steels | 0.27–0.34 | 14 | | [32HN3M](/materials/pn/32hn3m "32HN3M") | [1.6773](/materials/material-no/1.6773 "1.6773") | Quenched and tempered steels | 0.32–0.39 | 5 | **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/3 "Previous") Page 4 of 13[Next](/materials/pn/page/5 "Next")