--- title: "ABNT NBR steel grades — 72 designations — Page 2" description: "Steel grades designated under ABNT NBR, with chemical composition, mechanical properties and equivalents in other standards. 72 designations…" canonical: https://steelequivalents.com/materials/abnt/page/2 language: en robots: index, follow og_type: website type: material-standard language_alternates: en: https://steelequivalents.com/materials/abnt/page/2.md cs: https://steelequivalents.com/cs/materiály/abnt.md de: https://steelequivalents.com/de/werkstoffe/abnt.md es: https://steelequivalents.com/es/materiales/abnt.md fr: https://steelequivalents.com/fr/matériaux/abnt.md hu: https://steelequivalents.com/hu/anyagok/abnt.md it: https://steelequivalents.com/it/materiali/abnt.md nl: https://steelequivalents.com/nl/materialen/abnt.md pl: https://steelequivalents.com/pl/materiały/abnt.md pt: https://steelequivalents.com/pt/materiais/abnt.md ru: https://steelequivalents.com/ru/материалы/abnt.md tr: https://steelequivalents.com/tr/malzemeler/abnt.md zh: https://steelequivalents.com/zh/材料/abnt.md ja: https://steelequivalents.com/ja/材料/abnt.md ar: https://steelequivalents.com/ar/المواد/abnt.md ko: https://steelequivalents.com/ko/재료/abnt.md pt-br: https://steelequivalents.com/pt-br/materiais/abnt.md hi: https://steelequivalents.com/hi/सामग्री/abnt.md content_hash: sha256:dc30340a47f504fcd357ad98bff631e1c304f36dd7ff5dd4fefc90ef8634b9da 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/abnt/page/2 > Canonical URL: https://steelequivalents.com/materials/abnt/page/2 > 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. ABNT NBR · 72 grades # ABNT NBR steel grades — 72 designations — Page 2 Every grade designated under ABNT NBR, 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 72 designations | Grade | Material no. | Category | C% by weight | Also in other standards | |---|---|---|---|---| | [NBR 5008 CGR400](/materials/abnt/nbr-5008-cgr400 "NBR 5008 CGR400") | [1.0114](/materials/material-no/1.0114 "1.0114") | Unalloyed structural steels | ≤ 0.17 | 21 | | [NBR 5008 CGR400](/materials/abnt/nbr-5008-cgr400 "NBR 5008 CGR400") | [1.8959](/materials/material-no/1.8959 "1.8959") | Weathering steels | ≤ 0.16 | 10 | | [NBR 5008 CGR500](/materials/abnt/nbr-5008-cgr500 "NBR 5008 CGR500") | [1.8959](/materials/material-no/1.8959 "1.8959") | Weathering steels | ≤ 0.16 | 10 | | [NBR 5920 CFR500](/materials/abnt/nbr-5920-cfr500 "NBR 5920 CFR500") | [1.8959](/materials/material-no/1.8959 "1.8959") | Weathering steels | ≤ 0.16 | 10 | | [NBR 5921 CFR400](/materials/abnt/nbr-5921-cfr400 "NBR 5921 CFR400") | [1.0114](/materials/material-no/1.0114 "1.0114") | Unalloyed structural steels | ≤ 0.17 | 21 | | [NBR 5921 CFR400](/materials/abnt/nbr-5921-cfr400 "NBR 5921 CFR400") | [1.8959](/materials/material-no/1.8959 "1.8959") | Weathering steels | ≤ 0.16 | 10 | | [NBR 5921 CFR500](/materials/abnt/nbr-5921-cfr500 "NBR 5921 CFR500") | [1.8959](/materials/material-no/1.8959 "1.8959") | Weathering steels | ≤ 0.16 | 10 | | [NBR 6648 CG26](/materials/abnt/nbr-6648-cg26 "NBR 6648 CG26") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [NBR 6648 CG26](/materials/abnt/nbr-6648-cg26 "NBR 6648 CG26") | [1.0037](/materials/material-no/1.0037 "1.0037") | Unalloyed structural steels | ≤ 0.17 | 7 | | [NBR 6648 CG26](/materials/abnt/nbr-6648-cg26 "NBR 6648 CG26") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [NBR 6648 CG26](/materials/abnt/nbr-6648-cg26 "NBR 6648 CG26") | [1.0167](/materials/material-no/1.0167 "1.0167") | Unalloyed structural steels | ≤ 0.17 | 4 | | [NBR 6650 CF26](/materials/abnt/nbr-6650-cf26 "NBR 6650 CF26") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [NBR 6650 CF26](/materials/abnt/nbr-6650-cf26 "NBR 6650 CF26") | [1.0037](/materials/material-no/1.0037 "1.0037") | Unalloyed structural steels | ≤ 0.17 | 7 | | [NBR 6650 CF26](/materials/abnt/nbr-6650-cf26 "NBR 6650 CF26") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [NBR 6650 CF26](/materials/abnt/nbr-6650-cf26 "NBR 6650 CF26") | [1.0167](/materials/material-no/1.0167 "1.0167") | Unalloyed structural steels | ≤ 0.17 | 4 | | [NBR 7007 AR350](/materials/abnt/nbr-7007-ar350 "NBR 7007 AR350") | [1.0045](/materials/material-no/1.0045 "1.0045") | Unalloyed structural steels | ≤ 0.24 | 17 | | [NBR 7007 AR350 COR](/materials/abnt/nbr-7007-ar350-cor "NBR 7007 AR350 COR") | [1.8959](/materials/material-no/1.8959 "1.8959") | Weathering steels | ≤ 0.16 | 10 | | [NBR 7007 AR415](/materials/abnt/nbr-7007-ar415 "NBR 7007 AR415") | [1.0590](/materials/material-no/1.0590 "1.0590") | Unalloyed structural steels | ≤ 0.2 | 2 | | [NBR 7007 MR250](/materials/abnt/nbr-7007-mr250 "NBR 7007 MR250") | [1.0036](/materials/material-no/1.0036 "1.0036") | Unalloyed structural steels | ≤ 0.17 | 20 | | [NBR 7007 MR250](/materials/abnt/nbr-7007-mr250 "NBR 7007 MR250") | [1.0037](/materials/material-no/1.0037 "1.0037") | Unalloyed structural steels | ≤ 0.17 | 7 | | [NBR 7007 MR250](/materials/abnt/nbr-7007-mr250 "NBR 7007 MR250") | [1.0038](/materials/material-no/1.0038 "1.0038") | Unalloyed structural steels | ≤ 0.17 | 26 | | [NBR 7007 MR250](/materials/abnt/nbr-7007-mr250 "NBR 7007 MR250") | [1.0167](/materials/material-no/1.0167 "1.0167") | Unalloyed structural steels | ≤ 0.17 | 4 | **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/abnt "Previous") Page 2 of 2