--- title: "GB steel grades — 1318 designations — Page 7" 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/7 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/gb/page/7.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: sha256:37649d681d5a868f44b580ad5c80cff64316dd87ce55d55e6c3f84ff224906ce 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/gb/page/7 > Canonical URL: https://steelequivalents.com/materials/gb/page/7 > 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 7 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. 10 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 | |---|---|---|---|---| | [16MnRE](/materials/gb/16mnre "16MnRE") This grade’s own name | — | — | 0.12–0.2 | — | | [17Cr16Ni2](/materials/gb/17cr16ni2 "17Cr16Ni2") This grade’s own name | — | — | 0.12–0.22 | — | | [17Cr2Ni2Mo](/materials/gb/17cr2ni2mo "17Cr2Ni2Mo") | [1.6587](/materials/material-no/1.6587 "1.6587") | Case hardening steels | 0.15–0.21 | 15 | | [18Cr11NiMoNbVN](/materials/gb/18cr11nimonbvn "18Cr11NiMoNbVN") This grade’s own name | — | — | 0.15–0.2 | — | | [18Cr12MoVNbN](/materials/gb/18cr12movnbn "18Cr12MoVNbN") This grade’s own name | — | — | 0.15–0.2 | — | | [18Cr2Ni4W](/materials/gb/18cr2ni4w "18Cr2Ni4W") This grade’s own name | — | — | 0.13–0.19 | — | | [18Cr2Ni4WA](/materials/gb/18cr2ni4wa "18Cr2Ni4WA") This grade’s own name | — | — | 0.13–0.19 | — | | [18CrMn](/materials/gb/18crmn "18CrMn") | [1.7131](/materials/material-no/1.7131 "1.7131") | Case hardening steels | 0.14–0.19 | 24 | | [18CrMnNiMo](/materials/gb/18crmnnimo "18CrMnNiMo") This grade’s own name | — | — | 0.15–0.21 | — | | [18MnMoNbR](/materials/gb/18mnmonbr "18MnMoNbR") | [1.8905](/materials/material-no/1.8905 "1.8905") | Fine-grain structural steels | ≤ 0.2 | 14 | | [18MnMoNbR](/materials/gb/18mnmonbr "18MnMoNbR") | [1.5218](/materials/material-no/1.5218 "1.5218") | Others | 0.2–0.23 | 13 | | [18Nb](/materials/gb/18nb "18Nb") This grade’s own name | — | — | 0.14–0.22 | — | | [19Mng](/materials/gb/19mng "19Mng") This grade’s own name | — | — | 0.15–0.22 | — | | [1Cr11MoV](/materials/gb/1cr11mov "1Cr11MoV") | [1.4922](/materials/material-no/1.4922 "1.4922") | High-temperature steels | 0.17–0.23 | 7 | | [1Cr12](/materials/gb/1cr12 "1Cr12") | [1.4000](/materials/material-no/1.4000 "1.4000") | Stainless steels | ≤ 0.08 | 16 | | [1Cr12](/materials/gb/1cr12 "1Cr12") | [1.4006](/materials/material-no/1.4006 "1.4006") | Stainless steels | 0.08–0.15 | 26 | | [1Cr13](/materials/gb/1cr13 "1Cr13") | [1.4006](/materials/material-no/1.4006 "1.4006") | Stainless steels | 0.08–0.15 | 26 | | [1Cr15](/materials/gb/1cr15 "1Cr15") | [1.4016](/materials/material-no/1.4016 "1.4016") | Stainless steels | ≤ 0.08 | 18 | | [1Cr16Ni35](/materials/gb/1cr16ni35 "1Cr16Ni35") | [1.4864](/materials/material-no/1.4864 "1.4864") | Heat resistant steels | ≤ 0.15 | 14 | | [1Cr17](/materials/gb/1cr17 "1Cr17") | [1.4016](/materials/material-no/1.4016 "1.4016") | Stainless steels | ≤ 0.08 | 18 | | [1Cr17Mn6Ni5N](/materials/gb/1cr17mn6ni5n "1Cr17Mn6Ni5N") | [1.4372](/materials/material-no/1.4372 "1.4372") | Others | ≤ 0.15 | 10 | | [1Cr17Mo](/materials/gb/1cr17mo "1Cr17Mo") | [1.4113](/materials/material-no/1.4113 "1.4113") | Stainless steels | ≤ 0.08 | 10 | | [1Cr17Ni2](/materials/gb/1cr17ni2 "1Cr17Ni2") | [1.4057](/materials/material-no/1.4057 "1.4057") | Stainless steels | 0.12–0.22 | 17 | | [1Cr17Ni7](/materials/gb/1cr17ni7 "1Cr17Ni7") | [1.4310](/materials/material-no/1.4310 "1.4310") | Stainless steels | 0.05–0.15 | 18 | | [1Cr17Ni8](/materials/gb/1cr17ni8 "1Cr17Ni8") This grade’s own name | — | — | 0.08–0.12 | 2 | | [1Cr18Mn8Ni5N](/materials/gb/1cr18mn8ni5n "1Cr18Mn8Ni5N") | [1.3965](/materials/material-no/1.3965 "1.3965") | Non-magnetic steels | ≤ 0.1 | 9 | | [1Cr18Mn8Ni5N](/materials/gb/1cr18mn8ni5n "1Cr18Mn8Ni5N") | [1.4373](/materials/material-no/1.4373 "1.4373") | Non-magnetic steels | ≤ 0.15 | 13 | | [1Cr18Mn8Ni5N](/materials/gb/1cr18mn8ni5n "1Cr18Mn8Ni5N") | [1.4731](/materials/material-no/1.4731 "1.4731") | Valve steels | 0.35–0.45 | 12 | | [1Cr18Ni11Nb](/materials/gb/1cr18ni11nb "1Cr18Ni11Nb") | [1.4550](/materials/material-no/1.4550 "1.4550") | Stainless steels | ≤ 0.08 | 15 | | [1Cr18Ni11Nb](/materials/gb/1cr18ni11nb "1Cr18Ni11Nb") | — | — | — | 4 | | [1Cr18Ni11Ti](/materials/gb/1cr18ni11ti "1Cr18Ni11Ti") | [1.4541](/materials/material-no/1.4541 "1.4541") | Stainless steels | ≤ 0.08 | 25 | | [1Cr18Ni12](/materials/gb/1cr18ni12 "1Cr18Ni12") | [1.4303](/materials/material-no/1.4303 "1.4303") | Stainless steels | ≤ 0.06 | 14 | | [1Cr18Ni12Mo2Ti](/materials/gb/1cr18ni12mo2ti "1Cr18Ni12Mo2Ti") | [1.4571](/materials/material-no/1.4571 "1.4571") | Stainless steels | ≤ 0.08 | 18 | | [1Cr18Ni12Mo2Ti](/materials/gb/1cr18ni12mo2ti "1Cr18Ni12Mo2Ti") | [1.4573](/materials/material-no/1.4573 "1.4573") | Cast stainless steels | ≤ 0.04 | 12 | | [1Cr18Ni12Mo3Ti](/materials/gb/1cr18ni12mo3ti "1Cr18Ni12Mo3Ti") | [1.4571](/materials/material-no/1.4571 "1.4571") | Stainless steels | ≤ 0.08 | 18 | | [1Cr18Ni12Mo3Ti](/materials/gb/1cr18ni12mo3ti "1Cr18Ni12Mo3Ti") | [1.4573](/materials/material-no/1.4573 "1.4573") | Cast stainless steels | ≤ 0.04 | 12 | | [1Cr18Ni12Mo3Ti](/materials/gb/1cr18ni12mo3ti "1Cr18Ni12Mo3Ti") | — | — | — | 1 | | [1Cr18Ni9](/materials/gb/1cr18ni9 "1Cr18Ni9") | [1.4300](/materials/material-no/1.4300 "1.4300") | Stainless steels | ≤ 0.12 | 15 | | [1Cr18Ni9](/materials/gb/1cr18ni9 "1Cr18Ni9") | [1.4310](/materials/material-no/1.4310 "1.4310") | Stainless steels | 0.05–0.15 | 18 | | [1Cr18Ni9](/materials/gb/1cr18ni9 "1Cr18Ni9") | [1.4324](/materials/material-no/1.4324 "1.4324") | Special steels for aviation and aerospace | ≤ 0.12 | 7 | | [1Cr18Ni9](/materials/gb/1cr18ni9 "1Cr18Ni9") | [1.4325](/materials/material-no/1.4325 "1.4325") | Stainless steels | 0.03–0.15 | 11 | | [1Cr18Ni9MoZr](/materials/gb/1cr18ni9mozr "1Cr18Ni9MoZr") | [1.4305](/materials/material-no/1.4305 "1.4305") | Stainless steels | ≤ 0.1 | 17 | | [1Cr18NI9T](/materials/gb/1cr18ni9t "1Cr18NI9T") | [1.4541](/materials/material-no/1.4541 "1.4541") | Stainless steels | ≤ 0.08 | 25 | | [1Cr18Ni9Ti](/materials/gb/1cr18ni9ti "1Cr18Ni9Ti") | [1.4878](/materials/material-no/1.4878 "1.4878") | Heat resistant steels | ≤ 0.1 | 14 | | [1Cr18Ni9Ti](/materials/gb/1cr18ni9ti "1Cr18Ni9Ti") | [1.4541](/materials/material-no/1.4541 "1.4541") | Stainless steels | ≤ 0.08 | 25 | | [1Cr19Al3](/materials/gb/1cr19al3 "1Cr19Al3") | [1.4742](/materials/material-no/1.4742 "1.4742") | Heat resistant steels | ≤ 0.12 | 17 | | [1Cr19Ni11Nb](/materials/gb/1cr19ni11nb "1Cr19Ni11Nb") | — | — | — | 4 | | [1Cr19Ni11Nb](/materials/gb/1cr19ni11nb "1Cr19Ni11Nb") | [1.4550](/materials/material-no/1.4550 "1.4550") | Stainless steels | ≤ 0.08 | 15 | | [1Cr20Ni14Si2](/materials/gb/1cr20ni14si2 "1Cr20Ni14Si2") | [1.4828](/materials/material-no/1.4828 "1.4828") | Heat resistant steels | ≤ 0.2 | 20 | | [1Cr23Ni13](/materials/gb/1cr23ni13 "1Cr23Ni13") | [1.4828](/materials/material-no/1.4828 "1.4828") | Heat resistant 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/6 "Previous") Page 7 of 27[Next](/materials/gb/page/8 "Next")