--- title: "51Mn7 — High-strength steels" description: "51Mn7: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/51mn7 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/51mn7.md cs: https://steelequivalents.com/cs/materiály/din-en/51mn7.md de: https://steelequivalents.com/de/werkstoffe/din-en/51mn7.md es: https://steelequivalents.com/es/materiales/din-en/51mn7.md fr: https://steelequivalents.com/fr/matériaux/din-en/51mn7.md hu: https://steelequivalents.com/hu/anyagok/din-en/51mn7.md it: https://steelequivalents.com/it/materiali/din-en/51mn7.md nl: https://steelequivalents.com/nl/materialen/din-en/51mn7.md pl: https://steelequivalents.com/pl/materiały/din-en/51mn7.md pt: https://steelequivalents.com/pt/materiais/din-en/51mn7.md ru: https://steelequivalents.com/ru/материалы/din-en/51mn7.md tr: https://steelequivalents.com/tr/malzemeler/din-en/51mn7.md zh: https://steelequivalents.com/zh/材料/din-en/51mn7.md ja: https://steelequivalents.com/ja/材料/din-en/51mn7.md ar: https://steelequivalents.com/ar/المواد/din-en/51mn7.md ko: https://steelequivalents.com/ko/재료/din-en/51mn7.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/51mn7.md hi: https://steelequivalents.com/hi/सामग्री/din-en/51mn7.md content_hash: sha256:1c3f8c7199915215b6298f12da2543bc874d33ec43fe0daf153bde3af391b259 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/din-en/51mn7 > Canonical URL: https://steelequivalents.com/materials/din-en/51mn7 > 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. DIN / EN · Europe · 1 designation # 51Mn7 51Mn7 is a material in the category [High-strength steels](/categories/high-strength-steels "High-strength steels"), held under material number 1.5085. Its recorded composition includes C approx. 0.55%, Si approx. 0.6%, P 0.025%, S 0.025% and Mn approx. 1.9%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.5085**](/materials/material-no/1.5085 "Material no.: 1.5085") - [*Category* **High-strength steels · 128 grades**](/categories/high-strength-steels "Category: High-strength steels · 128 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=76694a9d-c04d-4cf6-b3c6-3738599b657d&designation=44010827-8190-4aa5-bd09-256453316f58 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/51mn7.pdf "Datasheet as PDF") ## About High-strength steels High-strength steels are steels designed to carry high loads while resisting deformation. They are used for load-bearing structures, vehicles and machinery where strength, durability and reduced material weight are important. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Mn Si C Iron — the balance, never listed by a standard — 96.9 % Mn — 1.9 % Si — 0.6 % C — 0.6 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≈ 0.55 — Unusual | | Si | ≈ 0.6 | | Mn | ≈ 1.9 | | P | 0.025 | | S | 0.025 | | Al | ≥ 0.025 | Carbon Silicon Manganese Phosphorus Sulfur Aluminium 0.01 % 0.1 % 1 % 10 % 100 % The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other. | Element | As published source text, verbatim | Min% by weight | Max% by weight | Bound | |---|---|---|---|---| | C | ~0,55 | 0.550 | 0.550 | Indicative | | Al | ≥0,025 | 0.025 | — | Min | | Si | ~0,60 | 0.600 | 0.600 | Indicative | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,025 | 0.025 | 0.025 | Exact | | Mn | ~1,90 | 1.900 | 1.900 | Indicative | The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred. ## Predicted transformation temperatures Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni, Cr, Mo. ## Physical & mechanical properties Density 7,85 g/cm³ Exact 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=76694a9d-c04d-4cf6-b3c6-3738599b657d&designation=44010827-8190-4aa5-bd09-256453316f58 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/51mn7.pdf "Datasheet as PDF")