--- title: "A242 — composition, equivalents and standards" description: "A242: 2 equivalent designations across 2 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/astm/a242 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/astm/a242.md cs: https://steelequivalents.com/cs/materiály/astm/a242.md de: https://steelequivalents.com/de/werkstoffe/astm/a242.md es: https://steelequivalents.com/es/materiales/astm/a242.md fr: https://steelequivalents.com/fr/matériaux/astm/a242.md hu: https://steelequivalents.com/hu/anyagok/astm/a242.md it: https://steelequivalents.com/it/materiali/astm/a242.md nl: https://steelequivalents.com/nl/materialen/astm/a242.md pl: https://steelequivalents.com/pl/materiały/astm/a242.md pt: https://steelequivalents.com/pt/materiais/astm/a242.md ru: https://steelequivalents.com/ru/материалы/astm/a242.md tr: https://steelequivalents.com/tr/malzemeler/astm/a242.md zh: https://steelequivalents.com/zh/材料/astm/a242.md ja: https://steelequivalents.com/ja/材料/astm/a242.md ar: https://steelequivalents.com/ar/المواد/astm/a242.md ko: https://steelequivalents.com/ko/재료/astm/a242.md pt-br: https://steelequivalents.com/pt-br/materiais/astm/a242.md hi: https://steelequivalents.com/hi/सामग्री/astm/a242.md content_hash: sha256:f027cb44b12eb75cc113788f2baf7088e160032b9d463e2c22ca832babe2c33f 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/astm/a242 > Canonical URL: https://steelequivalents.com/materials/astm/a242 > 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. ASTM · United States · 2 designations # A242 B-282 is a grade designated under NMX. We list one designation recorded for this grade, in the standard ASTM. No chemical composition is recorded for this material. - *Designations* **2** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=f67a0c31-5b2e-4446-8de1-61c62d109f7f&designation=85711bc0-57e2-49c4-aa2f-dabd3bd0efb0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/a242.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [NMX B-282 This grade’s own name](/materials/nmx/b-282 "NMX B-282") ## Also known as 2 designations · 2 standards · nothing hidden 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. ASTM United States · 1 - **A242 Indicative** NMX Mexico · 1 - [B-282 This grade’s own name](/materials/nmx/b-282 "NMX B-282") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Predicted transformation temperatures Not enough recorded composition to predict a transformation temperature for this grade — missing: C, Mn, Si, Ni, Cr, Mo. ## Physical & mechanical properties An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material. ## Looking for this grade under another name? Search the catalogue by designation, material number or composition — every name on this page is itself a way in. [Search](/search "Steel grade search")[Inquiry](/inquiry?material=f67a0c31-5b2e-4446-8de1-61c62d109f7f&designation=85711bc0-57e2-49c4-aa2f-dabd3bd0efb0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/a242.pdf "Datasheet as PDF")