--- title: "GB steel grades — 1318 designations — Page 25" description: "Steel grades designated under GB, with chemical composition, mechanical properties and equivalents in other standards. 1318 designations across 991…" canonical: https://steelequivalents.com/materials/gb/page/25 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/gb/page/25.md cs: https://steelequivalents.com/cs/materiály/gb.md de: https://steelequivalents.com/de/werkstoffe/gb.md es: https://steelequivalents.com/es/materiales/gb.md fr: https://steelequivalents.com/fr/matériaux/gb.md hu: https://steelequivalents.com/hu/anyagok/gb.md it: https://steelequivalents.com/it/materiali/gb.md nl: https://steelequivalents.com/nl/materialen/gb.md pl: https://steelequivalents.com/pl/materiały/gb.md pt: https://steelequivalents.com/pt/materiais/gb.md ru: https://steelequivalents.com/ru/материалы/gb.md tr: https://steelequivalents.com/tr/malzemeler/gb.md zh: https://steelequivalents.com/zh/材料/gb.md ja: https://steelequivalents.com/ja/材料/gb.md ar: https://steelequivalents.com/ar/المواد/gb.md ko: https://steelequivalents.com/ko/재료/gb.md pt-br: https://steelequivalents.com/pt-br/materiais/gb.md hi: https://steelequivalents.com/hi/सामग्री/gb.md content_hash: sha256:69f2f78a0b3ca65b291d26b1437cf75f26efa015827f00e697862f2aee325b32 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/gb/page/25 > Canonical URL: https://steelequivalents.com/materials/gb/page/25 > 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. GB · 1,318 grades # GB steel grades — 1318 designations — Page 25 Every grade designated under GB, with the identifying and comparative data we hold for each. Open a grade for its full composition, properties and its designations in other standards. Unless marked, every name here is an asserted identity — the same grade under this standard’s own designation. 16 of 50 rows differ and carry an “Indicative” mark. ## Also known as 1318 designations | Grade | C% by weight | Also in other standards | |---|---|---| | [W10Mo2Cr4V5Co8](/materials/gb/w10mo2cr4v5co8 "W10Mo2Cr4V5Co8") | 1.55–1.67 | — | | [W10Mo4Cr4V3Co10](/materials/gb/w10mo4cr4v3co10 "W10Mo4Cr4V3Co10") | 1.2–1.3 | — | | [W12Cr4V5Co5](/materials/gb/w12cr4v5co5 "W12Cr4V5Co5") Indicative | 1.3–1.45 | 12 | | [W18Cr4V](/materials/gb/w18cr4v "W18Cr4V") Indicative | 0.73–0.83 | 22 | | [W18Cr4V2Co 8](/materials/gb/w18cr4v2co-8 "W18Cr4V2Co 8") | 0.75–0.85 | — | | [W18Cr4VCo4](/materials/gb/w18cr4vco4 "W18Cr4VCo4") Indicative | 0.75–0.83 | 14 | | [W18Cr4VCo5](/materials/gb/w18cr4vco5 "W18Cr4VCo5") Indicative | 0.75–0.83 | 14 | | [W2Mo8Cr4V](/materials/gb/w2mo8cr4v "W2Mo8Cr4V") | 0.77–0.87 | 2 | | [W2Mo9Cr4V2](/materials/gb/w2mo9cr4v2 "W2Mo9Cr4V2") | 0.95–1.05 | — | | [W2Mo9Cr4VCo8](/materials/gb/w2mo9cr4vco8 "W2Mo9Cr4VCo8") Indicative | 1.05–1.15 | 14 | | [W3Mo3Cr4V2](/materials/gb/w3mo3cr4v2 "W3Mo3Cr4V2") | 0.95–1.03 | 1 | | [W4Mo3Cr4VSi](/materials/gb/w4mo3cr4vsi "W4Mo3Cr4VSi") | 0.83–0.93 | — | | [W50276](/materials/gb/w50276 "W50276") Indicative | 0.05–0.1 | 6 | | [W6Mo5Cr4V2](/materials/gb/w6mo5cr4v2 "W6Mo5Cr4V2") Indicative | 0.8–0.88 | 16 | | [W6Mo5Cr4V2](/materials/gb/w6mo5cr4v2 "W6Mo5Cr4V2") Indicative | 0.86–0.94 | 19 | | [W6Mo5Cr4V2Al](/materials/gb/w6mo5cr4v2al "W6Mo5Cr4V2Al") | 1.05–1.15 | — | | [W6Mo5Cr4V2Co2](/materials/gb/w6mo5cr4v2co2 "W6Mo5Cr4V2Co2") | 0.88–0.96 | — | | [W6Mo5Cr4V2Co5](/materials/gb/w6mo5cr4v2co5 "W6Mo5Cr4V2Co5") Indicative | 0.87–0.95 | 19 | | [W6Mo5Cr4V3](/materials/gb/w6mo5cr4v3 "W6Mo5Cr4V3") | 1.15–1.25 | 4 | | [W6Mo5Cr4V3Co8](/materials/gb/w6mo5cr4v3co8 "W6Mo5Cr4V3Co8") | 1.23–1.33 | 1 | | [W6Mo5Cr4V4](/materials/gb/w6mo5cr4v4 "W6Mo5Cr4V4") | 1.25–1.35 | 2 | | [W6Mo6Cr4V2](/materials/gb/w6mo6cr4v2 "W6Mo6Cr4V2") | 1–1.1 | — | | [W7Mo4Cr4V2Co5](/materials/gb/w7mo4cr4v2co5 "W7Mo4Cr4V2Co5") | 1.05–1.15 | — | | [W7Mo7Cr4V7Co11](/materials/gb/w7mo7cr4v7co11 "W7Mo7Cr4V7Co11") | 2.2–2.4 | — | | [W9Mo3Cr4V](/materials/gb/w9mo3cr4v "W9Mo3Cr4V") | 0.77–0.87 | — | | [X20Cr13](/materials/is/x20cr13 "X20Cr13") Indicative | 0.16–0.25 | 18 | | [X45CrSi93](/materials/din-en/x45crsi9-3 "X45CrSi93") Indicative | 0.4–0.5 | 16 | | [X45CrSi93](/materials/din-en/x45crsi9-3 "X45CrSi93") Indicative | 0.4–0.5 | 16 | | [Y06Cr17Mn6Ni6Cu2](/materials/gb/y06cr17mn6ni6cu2 "Y06Cr17Mn6Ni6Cu2") | ≤ 0.08 | — | | [Y08](/materials/gb/y08 "Y08") | ≤ 0.09 | 3 | | [Y08MnBi](/materials/gb/y08mnbi "Y08MnBi") | ≤ 0.09 | — | | [Y08MnS](/materials/gb/y08mns "Y08MnS") | ≤ 0.09 | — | | [Y08Pb](/materials/gb/y08pb "Y08Pb") | ≤ 0.09 | — | | [Y08Sn](/materials/gb/y08sn "Y08Sn") | ≤ 0.09 | — | | [Y108Cr17](/materials/gb/y108cr17 "Y108Cr17") | 0.95–1.2 | — | | [Y10Cr17](/materials/gb/y10cr17 "Y10Cr17") | ≤ 0.12 | — | | [Y12](/materials/gb/y12 "Y12") Indicative | 0.07–0.13 | 15 | | [Y12Cr13](/materials/gb/y12cr13 "Y12Cr13") | ≤ 0.15 | — | | [Y12Cr18Ni9](/materials/gb/y12cr18ni9 "Y12Cr18Ni9") | ≤ 0.15 | — | | [Y12Cr18Ni9Cu3](/materials/gb/y12cr18ni9cu3 "Y12Cr18Ni9Cu3") | ≤ 0.15 | — | | [Y12Cr18Ni9Se](/materials/gb/y12cr18ni9se "Y12Cr18Ni9Se") | ≤ 0.15 | — | | [Y12Pb](/materials/gb/y12pb "Y12Pb") | ≤ 0.15 | — | | [Y13](/materials/gb/y13 "Y13") Indicative | ≤ 0.14 | 11 | | [Y15](/materials/gb/y15 "Y15") Indicative | ≤ 0.14 | 14 | | [Y15Mn](/materials/gb/y15mn "Y15Mn") | 0.14–0.2 | — | | [Y15MnS](/materials/gb/y15mns "Y15MnS") | 0.14–0.2 | — | | [Y15Pb](/materials/gb/y15pb "Y15Pb") Indicative | ≤ 0.14 | 11 | | [Y15S](/materials/gb/y15s "Y15S") | 0.1–0.18 | — | | [Y15Sn](/materials/gb/y15sn "Y15Sn") | 0.13–0.18 | — | | [Y16Cr17Ni2](/materials/gb/y16cr17ni2 "Y16Cr17Ni2") | 0.12–0.2 | — | **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. [Previous](/materials/gb/page/24 "Previous") Page 25 of 27[Next](/materials/gb/page/26 "Next")