--- title: "NS steel grades — 28 designations" description: "Steel grades designated under NS, with chemical composition, mechanical properties and equivalents in other standards. 28 designations across 19…" canonical: https://steelequivalents.com/materials/ns language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/ns.md cs: https://steelequivalents.com/cs/materiály/ns.md de: https://steelequivalents.com/de/werkstoffe/ns.md es: https://steelequivalents.com/es/materiales/ns.md fr: https://steelequivalents.com/fr/matériaux/ns.md hu: https://steelequivalents.com/hu/anyagok/ns.md it: https://steelequivalents.com/it/materiali/ns.md nl: https://steelequivalents.com/nl/materialen/ns.md pl: https://steelequivalents.com/pl/materiały/ns.md pt: https://steelequivalents.com/pt/materiais/ns.md ru: https://steelequivalents.com/ru/материалы/ns.md tr: https://steelequivalents.com/tr/malzemeler/ns.md zh: https://steelequivalents.com/zh/材料/ns.md ja: https://steelequivalents.com/ja/材料/ns.md ar: https://steelequivalents.com/ar/المواد/ns.md ko: https://steelequivalents.com/ko/재료/ns.md pt-br: https://steelequivalents.com/pt-br/materiais/ns.md hi: https://steelequivalents.com/hi/सामग्री/ns.md content_hash: sha256:e8ec203ce5f8c99268b54dd4e098978a886f0d66f71b6e07b88030e4781fcea5 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/ns > Canonical URL: https://steelequivalents.com/materials/ns > 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. NS · 28 grades # NS steel grades — 28 designations Every grade designated under NS, 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 28 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [NS12-143](/materials/ns/ns12143 "NS12-143") | [1.0144](/materials/material-no/1.0144 "1.0144") | Unalloyed structural steels | ≤ 0.18 | 22 | | [NS12124](/materials/ns/ns12124 "NS12124") | [1.0114](/materials/material-no/1.0114 "1.0114") | Unalloyed structural steels | ≤ 0.17 | 21 | | [NS12142](/materials/ns/ns12142 "NS12142") | [1.0044](/materials/material-no/1.0044 "1.0044") | Unalloyed structural steels | ≤ 0.21 | 26 | | [NS12143](/materials/ns/ns12143 "NS12143") | [1.0143](/materials/material-no/1.0143 "1.0143") | Unalloyed structural steels | ≤ 0.18 | 16 | | [NS12153](/materials/ns/ns12153 "NS12153") | [1.0553](/materials/material-no/1.0553 "1.0553") | Unalloyed structural steels | ≤ 0.2 | 20 | | [Y03S355N1](/materials/ns/y03s355n1 "Y03S355N1") | [1.8814](/materials/material-no/1.8814 "1.8814") | Others | ≤ 0.2 | 2 | | [Y20S355M4z](/materials/ns/y20s355m4z "Y20S355M4z") | [1.8813](/materials/material-no/1.8813 "1.8813") | Others | ≤ 0.12 | 1 | | [Y20S355N4z](/materials/din-en/y20s355n4z "Y20S355N4z") | [1.8813](/materials/material-no/1.8813 "1.8813") | Others | ≤ 0.12 | 1 | | [Y21S355M3](/materials/ns/y21s355m3 "Y21S355M3") | [1.8810](/materials/material-no/1.8810 "1.8810") | Others | ≤ 0.14 | 3 | | [Y21S355M3](/materials/ns/y21s355m3 "Y21S355M3") | [1.8809](/materials/material-no/1.8809 "1.8809") | Others | ≤ 0.14 | 3 | | [Y21S355N3](/materials/ns/y21s355n3 "Y21S355N3") | [1.8810](/materials/material-no/1.8810 "1.8810") | Others | ≤ 0.14 | 3 | | [Y21S355N3](/materials/ns/y21s355n3 "Y21S355N3") | [1.8809](/materials/material-no/1.8809 "1.8809") | Others | ≤ 0.14 | 3 | | [Y25S355M4](/materials/ns/y25s355m4 "Y25S355M4") | [1.8811](/materials/material-no/1.8811 "1.8811") | Others | ≤ 0.12 | 1 | | [Y25S355N4](/materials/din-en/y25s355n4 "Y25S355N4") | [1.8811](/materials/material-no/1.8811 "1.8811") | Others | ≤ 0.12 | 1 | | [Y26S355M3](/materials/ns/y26s355m3 "Y26S355M3") | [1.8806](/materials/material-no/1.8806 "1.8806") | Others | ≤ 0.14 | 3 | | [Y26S355N3](/materials/ns/y26s355n3 "Y26S355N3") | [1.8806](/materials/material-no/1.8806 "1.8806") | Others | ≤ 0.14 | 3 | | [Y30S420M3z](/materials/ns/y30s420m3z "Y30S420M3z") | [1.8857](/materials/material-no/1.8857 "1.8857") | Others | ≤ 0.14 | 2 | | [Y30S420Q3z](/materials/ns/y30s420q3z "Y30S420Q3z") | [1.8857](/materials/material-no/1.8857 "1.8857") | Others | ≤ 0.14 | 2 | | [Y31S420M3z](/materials/ns/y31s420m3z "Y31S420M3z") | [1.8859](/materials/material-no/1.8859 "1.8859") | Others | ≤ 0.14 | 2 | | [Y35S420M3](/materials/ns/y35s420m3 "Y35S420M3") | [1.8830](/materials/material-no/1.8830 "1.8830") | Others | ≤ 0.14 | 2 | | [Y35S420Q3](/materials/ns/y35s420q3 "Y35S420Q3") | [1.8830](/materials/material-no/1.8830 "1.8830") | Others | ≤ 0.14 | 2 | | [Y36S420M3](/materials/ns/y36s420m3 "Y36S420M3") | [1.8851](/materials/material-no/1.8851 "1.8851") | Others | ≤ 0.14 | 2 | | [Y40S460M3z](/materials/ns/y40s460m3z "Y40S460M3z") | [1.8887](/materials/material-no/1.8887 "1.8887") | Others | ≤ 0.14 | 3 | | [Y40S460Q3z](/materials/ns/y40s460q3z "Y40S460Q3z") | [1.8887](/materials/material-no/1.8887 "1.8887") | Others | ≤ 0.14 | 3 | | [Y41S460M3z](/materials/ns/y41s460m3z "Y41S460M3z") | [1.8889](/materials/material-no/1.8889 "1.8889") | Others | ≤ 0.14 | 2 | | [Y45S460M3](/materials/ns/y45s460m3 "Y45S460M3") | [1.8878](/materials/material-no/1.8878 "1.8878") | Others | ≤ 0.14 | 3 | | [Y45S460Q3](/materials/ns/y45s460q3 "Y45S460Q3") | [1.8878](/materials/material-no/1.8878 "1.8878") | Others | ≤ 0.14 | 3 | | [Y46S460M3](/materials/ns/y46s460m3 "Y46S460M3") | [1.8883](/materials/material-no/1.8883 "1.8883") | Others | ≤ 0.14 | 2 | **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.