--- title: "GB steel grades — 1318 designations — Page 18" 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/18 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/gb/page/18.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: sha256:9a2686239fd8b7da7edd9db9fef01517b60af835e920eae086e45befb902401a generated: 2026-09-26 --- > **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/18 > Canonical URL: https://steelequivalents.com/materials/gb/page/18 > 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 18 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. 13 of 50 rows differ and carry an “Indicative” mark. ## Also known as 1318 designations | Grade | C% by weight | Also in other standards | |---|---|---| | [HRB400E](/materials/gb/hrb400e "HRB400E") | ≤ 0.25 | — | | [HRB500](/materials/gb/hrb500 "HRB500") | ≤ 0.25 | — | | [HT100](/materials/gb/ht100 "HT100") Indicative | — | 16 | | [HT150](/materials/gb/ht150 "HT150") Indicative | — | 22 | | [HT200](/materials/gb/ht200 "HT200") Indicative | — | 22 | | [HT250](/materials/gb/ht250 "HT250") Indicative | — | 22 | | [HT300](/materials/gb/ht300 "HT300") Indicative | — | 22 | | [HT350](/materials/gb/ht350 "HT350") Indicative | — | 21 | | [HT400](/materials/gb/ht400 "HT400") | — | 4 | | [MFT10](/materials/gb/mft10 "MFT10") | 0.08–0.14 | — | | [MFT8](/materials/gb/mft8 "MFT8") | 0.16–0.26 | — | | [MFT9](/materials/gb/mft9 "MFT9") | 0.18–0.26 | — | | [ML022Cr17Ni12Mo2](/materials/gb/ml022cr17ni12mo2 "ML022Cr17Ni12Mo2") | ≤ 0.03 | — | | [ML022Cr19Ni10](/materials/gb/ml022cr19ni10 "ML022Cr19Ni10") | ≤ 0.03 | — | | [ML04Al](/materials/gb/ml04al "ML04Al") | ≤ 0.06 | — | | [ML06Al](/materials/gb/ml06al "ML06Al") | ≤ 0.08 | — | | [ML06Cr11Ti](/materials/gb/ml06cr11ti "ML06Cr11Ti") | ≤ 0.08 | — | | [ML06Cr17Ni12Mo2](/materials/gb/ml06cr17ni12mo2 "ML06Cr17Ni12Mo2") | ≤ 0.08 | — | | [ML06Cr18Ni11Ti](/materials/gb/ml06cr18ni11ti "ML06Cr18Ni11Ti") | ≤ 0.08 | — | | [ML06Cr18Ni9Cu2](/materials/gb/ml06cr18ni9cu2 "ML06Cr18Ni9Cu2") | ≤ 0.08 | — | | [ML06Cr19Ni10](/materials/gb/ml06cr19ni10 "ML06Cr19Ni10") | ≤ 0.08 | — | | [ML08](/materials/gb/ml08 "ML08") Indicative | ≤ 0.12 | 17 | | [ML08Al](/materials/gb/ml08al "ML08Al") | 0.05–0.1 | — | | [ML10](/materials/gb/ml10 "ML10") Indicative | ≤ 0.1 | 11 | | [ML10Al](/materials/gb/ml10al "ML10Al") | 0.08–0.13 | 5 | | [ML10Cr15](/materials/gb/ml10cr15 "ML10Cr15") | ≤ 0.12 | — | | [ML12](/materials/gb/ml12 "ML12") | 0.1–0.15 | — | | [ML12Al](/materials/gb/ml12al "ML12Al") | 0.1–0.15 | — | | [ML12Cr13](/materials/gb/ml12cr13 "ML12Cr13") | 0.08–0.15 | — | | [ML14Cr17Ni2](/materials/gb/ml14cr17ni2 "ML14Cr17Ni2") | 0.11–0.17 | — | | [ML15](/materials/gb/ml15 "ML15") Indicative | 0.13–0.17 | 7 | | [ML15Al](/materials/gb/ml15al "ML15Al") | 0.13–0.18 | — | | [ML15Cr](/materials/gb/ml15cr "ML15Cr") Indicative | 0.12–0.18 | 15 | | [ML15Mn](/materials/gb/ml15mn "ML15Mn") | 0.14–0.2 | — | | [ML15MnB](/materials/gb/ml15mnb "ML15MnB") | 0.14–0.2 | 3 | | [ML15MnVB](/materials/gb/ml15mnvb "ML15MnVB") | 0.13–0.18 | — | | [ML18Mn](/materials/gb/ml18mn "ML18Mn") | 0.15–0.2 | 4 | | [ML1Cr17](/materials/gb/ml1cr17 "ML1Cr17") Indicative | ≤ 0.08 | 18 | | [ML1Cr17Ni2](/materials/gb/ml1cr17ni2 "ML1Cr17Ni2") Indicative | 0.12–0.22 | 17 | | [ML20](/materials/gb/ml20 "ML20") | 0.18–0.23 | 5 | | [ML20Al](/materials/gb/ml20al "ML20Al") | 0.18–0.23 | 4 | | [ML20B](/materials/gb/ml20b "ML20B") | 0.18–0.23 | — | | [ML20Cr](/materials/gb/ml20cr "ML20Cr") | 0.18–0.23 | — | | [ML20Cr13](/materials/gb/ml20cr13 "ML20Cr13") | 0.16–0.25 | — | | [ML20CrMo](/materials/gb/ml20crmo "ML20CrMo") | 0.18–0.23 | 3 | | [ML20Mn](/materials/gb/ml20mn "ML20Mn") | 0.18–0.23 | — | | [ML20MnB](/materials/gb/ml20mnb "ML20MnB") | 0.18–0.23 | — | | [ML20MnTiB](/materials/gb/ml20mntib "ML20MnTiB") | 0.18–0.23 | — | | [ML20MnVB](/materials/gb/ml20mnvb "ML20MnVB") | 0.18–0.23 | — | | [ML25](/materials/gb/ml25 "ML25") Indicative | 0.22–0.29 | 20 | **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/17 "Previous") Page 18 of 27[Next](/materials/gb/page/19 "Next")