--- title: "PN steel grades — 635 designations — Page 9" 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/9 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/pn/page/9.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: sha256:4c039e8cb3d080d3a2f6c4a44d73531de7e3e47b9998b20176abaf346180cc0a generated: 2026-09-25 --- > **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/9 > Canonical URL: https://steelequivalents.com/materials/pn/page/9 > 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 9 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 | |---|---|---|---|---| | [H25N20S2](/materials/pn/h25n20s2 "H25N20S2") | [1.2782](/materials/material-no/1.2782 "1.2782") | Tool steels for hot work | ≤ 0.2 | 6 | | [H25N21](/materials/pn/h25n21 "H25N21") | [1.4845](/materials/material-no/1.4845 "1.4845") | Heat resistant steels | ≤ 0.1 | 21 | | [H25T](/materials/pn/h25t "H25T") | [1.4749](/materials/material-no/1.4749 "1.4749") | Heat resistant steels | 0.15–0.2 | 10 | | [H25T](/materials/pn/h25t "H25T") | [1.4746](/materials/material-no/1.4746 "1.4746") | Others | ≤ 0.12 | 8 | | [H26N4](/materials/pn/h26n4 "H26N4") | [1.4821](/materials/material-no/1.4821 "1.4821") | Heat resistant steels | 0.1–0.2 | 3 | | [H5M](/materials/pn/h5m "H5M") | [1.7362](/materials/material-no/1.7362 "1.7362") | Hydrogen resistant steels | 0.1–0.15 | 13 | | [H5M](/materials/pn/h5m "H5M") | [1.7366](/materials/material-no/1.7366 "1.7366") | Others | ≤ 0.18 | 6 | | [H6S2](/materials/pn/h6s2 "H6S2") | [1.4713](/materials/material-no/1.4713 "1.4713") | Heat resistant steels | ≤ 0.12 | 7 | | [H6S2](/materials/pn/h6s2 "H6S2") | [1.4712](/materials/material-no/1.4712 "1.4712") | Heat resistant steels | ≤ 0.12 | 3 | | [H9S2](/materials/pn/h9s2 "H9S2") | [1.4718](/materials/material-no/1.4718 "1.4718") | Valve steels | 0.4–0.5 | 16 | | [H9S2](/materials/pn/h9s2 "H9S2") | [1.4718](/materials/material-no/1.4718 "1.4718") | Others | 0.4–0.5 | 16 | | [K10](/materials/pn/k10 "K10") | [1.0301](/materials/material-no/1.0301 "1.0301") | Case hardening steels | 0.07–0.13 | 20 | | [K18](/materials/pn/k18 "K18") | [1.0402](/materials/material-no/1.0402 "1.0402") | Quenched and tempered steels | 0.17–0.24 | 24 | | [K18](/materials/pn/k18 "K18") | [1.0436](/materials/material-no/1.0436 "1.0436") | Fine-grain structural steels | 0.15–0.2 | 14 | | [K32Nb](/materials/pn/k32nb "K32Nb") | [1.6368](/materials/material-no/1.6368 "1.6368") | Heat-resistant structural steels | ≤ 0.17 | 4 | | [K32NbA](/materials/pn/k32nba "K32NbA") | [1.6368](/materials/material-no/1.6368 "1.6368") | Heat-resistant structural steels | ≤ 0.17 | 4 | | [L120G13](/materials/pn/l120g13 "L120G13") | [1.3401](/materials/material-no/1.3401 "1.3401") | Quenched and tempered steels | 1.1–1.3 | 19 | | [L18HM](/materials/pn/l18hm "L18HM") | [1.7733](/materials/material-no/1.7733 "1.7733") | Heat-resistant structural steels | 0.2–0.28 | 15 | | [L20](/materials/pn/l20 "L20") | [1.0443](/materials/material-no/1.0443 "1.0443") | Others | ≤ 0.11 | 13 | | [L20G](/materials/pn/l20g "L20G") | [1.1120](/materials/material-no/1.1120 "1.1120") | Others | 0.17–0.23 | 13 | | [L210H21](/materials/pn/l210h21 "L210H21") | [2.4066](/materials/material-no/2.4066 "2.4066") | Nickel and cobalt alloys | ≤ 0.1 | 10 | | [L210H21](/materials/pn/l210h21 "L210H21") | [2.4068](/materials/material-no/2.4068 "2.4068") | Nickel and cobalt alloys | ≤ 0.02 | 8 | | [L25HM](/materials/pn/l25hm "L25HM") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [L25HM](/materials/pn/l25hm "L25HM") | [1.7218](/materials/material-no/1.7218 "1.7218") | Quenched and tempered steels | 0.22–0.29 | 25 | | [L35G](/materials/pn/l35g "L35G") | [1.1167](/materials/material-no/1.1167 "1.1167") | Quenched and tempered steels | 0.32–0.4 | 17 | | [L35HM](/materials/pn/l35hm "L35HM") | [1.7220](/materials/material-no/1.7220 "1.7220") | Quenched and tempered steels | 0.3–0.37 | 24 | | [L400](/materials/pn/l400 "L400") | [1.0416](/materials/material-no/1.0416 "1.0416") | Others | 0.15–0.2 | 17 | | [L40H5MF](/materials/pn/l40h5mf "L40H5MF") | [1.2344](/materials/material-no/1.2344 "1.2344") | Tool steels for hot work | 0.35–0.42 | 20 | | [L450](/materials/din-en/l450 "L450") | [1.0443](/materials/material-no/1.0443 "1.0443") | Others | ≤ 0.11 | 13 | | [L500](/materials/pn/l500 "L500") | [1.0552](/materials/material-no/1.0552 "1.0552") | Others | ≤ 0.25 | 13 | | [LH14](/materials/pn/lh14 "LH14") | [1.4027](/materials/material-no/1.4027 "1.4027") | Cast stainless steels | 0.16–0.23 | 14 | | [LH15](/materials/pn/lh15 "LH15") | [1.3505](/materials/material-no/1.3505 "1.3505") | Bearing steels | 0.93–1.05 | 22 | | [ŁH15](/materials/pn/lh15 "ŁH15") | [1.3505](/materials/material-no/1.3505 "1.3505") | Bearing steels | 0.93–1.05 | 22 | | [ŁH15](/materials/pn/lh15 "ŁH15") | [1.2067](/materials/material-no/1.2067 "1.2067") | Tool steels for cold work | 0.95–1.1 | 21 | | [LH15](/materials/pn/lh15 "LH15") | [1.2067](/materials/material-no/1.2067 "1.2067") | Tool steels for cold work | 0.95–1.1 | 21 | | [LH15SG](/materials/pn/lh15sg "LH15SG") | [1.3520](/materials/material-no/1.3520 "1.3520") | Bearing steels | 0.93–1.05 | 16 | | [ŁH15SG](/materials/pn/lh15sg "ŁH15SG") | [1.3520](/materials/material-no/1.3520 "1.3520") | Bearing steels | 0.93–1.05 | 16 | | [LH18N9](/materials/pn/lh18n9 "LH18N9") | [1.4312](/materials/material-no/1.4312 "1.4312") | Cast stainless steels | ≤ 0.12 | 15 | | [LH18N9T](/materials/pn/lh18n9t "LH18N9T") | [1.4312](/materials/material-no/1.4312 "1.4312") | Cast stainless steels | ≤ 0.12 | 15 | | [LH23N18C](/materials/pn/lh23n18c "LH23N18C") | [1.4826](/materials/material-no/1.4826 "1.4826") | Heat-resistant cast steels | 0.3–0.5 | 13 | | [LH25N19S2](/materials/pn/lh25n19s2 "LH25N19S2") | [1.4848](/materials/material-no/1.4848 "1.4848") | Heat-resistant cast steels | 0.3–0.5 | 10 | | [LII400](/materials/pn/lii400 "LII400") | [1.0416](/materials/material-no/1.0416 "1.0416") | Others | 0.15–0.2 | 17 | | [LII400](/materials/pn/lii400 "LII400") | [1.0443](/materials/material-no/1.0443 "1.0443") | Others | ≤ 0.11 | 13 | | [LII500](/materials/pn/lii500 "LII500") | [1.0551](/materials/material-no/1.0551 "1.0551") | Unalloyed structural steels | ≤ 0.24 | 10 | | [LII500](/materials/pn/lii500 "LII500") | [1.0552](/materials/material-no/1.0552 "1.0552") | Others | ≤ 0.25 | 13 | | [LOH13](/materials/pn/loh13 "LOH13") | [1.4006](/materials/material-no/1.4006 "1.4006") | Stainless steels | 0.08–0.15 | 26 | | [MSt5](/materials/pn/mst5 "MSt5") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [MSt5](/materials/pn/mst5 "MSt5") | [1.0050](/materials/material-no/1.0050 "1.0050") | Unalloyed structural steels | — | 23 | | [MSt6](/materials/pn/mst6 "MSt6") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | | [MSt6](/materials/pn/mst6 "MSt6") | [1.0060](/materials/material-no/1.0060 "1.0060") | Unalloyed structural steels | — | 21 | **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/8 "Previous") Page 9 of 13[Next](/materials/pn/page/10 "Next")