--- title: "GB steel grades — 1318 designations — Page 6" 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/6 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/gb/page/6.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: sha256:5d7c221cb56b6aa2b3280cf037d707f13f8811e28591d77cb69018083c8ae21c 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/gb/page/6 > Canonical URL: https://steelequivalents.com/materials/gb/page/6 > 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 6 Every grade designated under GB, 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. Unless marked, every name here is an indicative cross-reference, not an asserted identity — the grades are close, not interchangeable. 23 of 50 rows differ and carry a “This grade’s own name” mark. ## Also known as 1318 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [15](/materials/gb/15 "15") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [15](/materials/gb/15 "15") | [1.0416](/materials/material-no/1.0416 "1.0416") | Others | 0.15–0.2 | 17 | | [15](/materials/gb/15 "15") | [1.9413](/materials/material-no/1.9413 "1.9413") | Others | 0.15–0.2 | 4 | | [15](/materials/gb/15 "15") | [1.0401](/materials/material-no/1.0401 "1.0401") | Case hardening steels | 0.12–0.18 | 23 | | [15](/materials/gb/15 "15") | [1.1141](/materials/material-no/1.1141 "1.1141") | Case hardening steels | 0.12–0.18 | 20 | | [15](/materials/gb/15 "15") This grade’s own name | [1.1132](/materials/material-no/1.1132 "1.1132") | Cold extrusion steels | 0.13–0.17 | 5 | | [158Cr12MoV](/materials/gb/158cr12mov "158Cr12MoV") This grade’s own name | — | — | 1.45–1.7 | — | | [15Cr](/materials/gb/15cr "15Cr") | [1.7015](/materials/material-no/1.7015 "1.7015") | Case hardening steels | 0.12–0.18 | 15 | | [15Cr12WMoV](/materials/gb/15cr12wmov "15Cr12WMoV") This grade’s own name | — | — | 0.12–0.18 | — | | [15CrA](/materials/gb/15cra "15CrA") | [1.7015](/materials/material-no/1.7015 "1.7015") | Case hardening steels | 0.12–0.18 | 15 | | [15CrMn](/materials/gb/15crmn "15CrMn") | [1.7131](/materials/material-no/1.7131 "1.7131") | Case hardening steels | 0.14–0.19 | 24 | | [15CrMo](/materials/gb/15crmo "15CrMo") | [1.7337](/materials/material-no/1.7337 "1.7337") | Heat-resistant structural steels | 0.13–0.2 | 9 | | [15CrMo](/materials/gb/15crmo "15CrMo") | [1.7262](/materials/material-no/1.7262 "1.7262") | Case hardening steels | 0.13–0.17 | 18 | | [15CrMoA](/materials/gb/15crmoa "15CrMoA") This grade’s own name | — | — | 0.12–0.18 | — | | [15CrMog](/materials/gb/15crmog "15CrMog") | [1.7262](/materials/material-no/1.7262 "1.7262") | Case hardening steels | 0.13–0.17 | 18 | | [15CrMoR](/materials/gb/15crmor "15CrMoR") | [1.7262](/materials/material-no/1.7262 "1.7262") | Case hardening steels | 0.13–0.17 | 18 | | [15CrMoR(HIC)](/materials/gb/15crmor-hic "15CrMoR(HIC)") This grade’s own name | — | — | 0.08–0.18 | — | | [15CrNiMoA](/materials/gb/15crnimoa "15CrNiMoA") This grade’s own name | — | — | 0.13–0.18 | — | | [15F](/materials/gb/15f "15F") | [1.0332](/materials/material-no/1.0332 "1.0332") | Unalloyed structural steels | ≤ 0.12 | 16 | | [15Mn](/materials/gb/15mn "15Mn") This grade’s own name | — | — | 0.12–0.18 | — | | [15MnCuCr](/materials/gb/15mncucr "15MnCuCr") This grade’s own name | — | — | 0.1–0.19 | — | | [15MnCuCr-QT](/materials/gb/15mncucr-qt "15MnCuCr-QT") This grade’s own name | — | — | 0.1–0.19 | — | | [15MnNbR](/materials/gb/15mnnbr "15MnNbR") This grade’s own name | — | — | ≤ 0.18 | — | | [15MnNiDR](/materials/gb/15mnnidr "15MnNiDR") This grade’s own name | — | — | ≤ 0.18 | — | | [15MnNiNbDR](/materials/gb/15mnninbdr "15MnNiNbDR") This grade’s own name | — | — | ≤ 0.18 | — | | [15MnTi](/materials/gb/15mnti "15MnTi") This grade’s own name | — | — | 0.12–0.18 | — | | [15MnV](/materials/gb/15mnv "15MnV") This grade’s own name | — | — | 0.12–0.18 | — | | [15MnVB](/materials/gb/15mnvb "15MnVB") This grade’s own name | — | — | 0.12–0.18 | — | | [15MnVN](/materials/gb/15mnvn "15MnVN") This grade’s own name | — | — | 0.12–0.2 | — | | [15MnVNR](/materials/gb/15mnvnr "15MnVNR") | [1.8905](/materials/material-no/1.8905 "1.8905") | Fine-grain structural steels | ≤ 0.2 | 14 | | [15MnVNR](/materials/gb/15mnvnr "15MnVNR") | [1.5218](/materials/material-no/1.5218 "1.5218") | Others | 0.2–0.23 | 13 | | [15MnVR](/materials/gb/15mnvr "15MnVR") This grade’s own name | — | — | ≤ 0.18 | — | | [16Cr20Ni14Si2](/materials/gb/16cr20ni14si2 "16Cr20Ni14Si2") This grade’s own name | — | — | ≤ 0.2 | — | | [16Cr23Ni13](/materials/gb/16cr23ni13 "16Cr23Ni13") This grade’s own name | — | — | ≤ 0.2 | — | | [16Cr25N](/materials/gb/16cr25n "16Cr25N") This grade’s own name | — | — | ≤ 0.2 | — | | [16Cr25Ni20Si2](/materials/gb/16cr25ni20si2 "16Cr25Ni20Si2") This grade’s own name | — | — | ≤ 0.2 | — | | [16CuCr](/materials/gb/16cucr "16CuCr") This grade’s own name | — | — | 0.12–0.2 | — | | [16Mn](/materials/gb/16mn "16Mn") | [1.0553](/materials/material-no/1.0553 "1.0553") | Unalloyed structural steels | ≤ 0.2 | 20 | | [16Mn](/materials/gb/16mn "16Mn") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [16Mn](/materials/gb/16mn "16Mn") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [16MnCr](/materials/gb/16mncr "16MnCr") | [1.7131](/materials/material-no/1.7131 "1.7131") | Case hardening steels | 0.14–0.19 | 24 | | [16MnDR](/materials/gb/16mndr "16MnDR") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [16MnDR](/materials/gb/16mndr "16MnDR") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [16Mng](/materials/gb/16mng "16Mng") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [16Mng](/materials/gb/16mng "16Mng") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [16MnL](/materials/gb/16mnl "16MnL") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [16MnL](/materials/gb/16mnl "16MnL") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 20 | | [16MnNb](/materials/gb/16mnnb "16MnNb") This grade’s own name | — | — | 0.12–0.2 | — | | [16MnR](/materials/gb/16mnr "16MnR") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 22 | | [16MnR](/materials/gb/16mnr "16MnR") | [1.0570](/materials/material-no/1.0570 "1.0570") | Unalloyed structural steels | ≤ 0.2 | 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/5 "Previous") Page 6 of 27[Next](/materials/gb/page/7 "Next")