--- title: "13MnMo12-5 — Heat-resistant structural steels" description: "13MnMo12-5: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/13mnmo12-5 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/13mnmo12-5.md cs: https://steelequivalents.com/cs/materiály/din-en/13mnmo12-5.md de: https://steelequivalents.com/de/werkstoffe/din-en/13mnmo12-5.md es: https://steelequivalents.com/es/materiales/din-en/13mnmo12-5.md fr: https://steelequivalents.com/fr/matériaux/din-en/13mnmo12-5.md hu: https://steelequivalents.com/hu/anyagok/din-en/13mnmo12-5.md it: https://steelequivalents.com/it/materiali/din-en/13mnmo12-5.md nl: https://steelequivalents.com/nl/materialen/din-en/13mnmo12-5.md pl: https://steelequivalents.com/pl/materiały/din-en/13mnmo12-5.md pt: https://steelequivalents.com/pt/materiais/din-en/13mnmo12-5.md ru: https://steelequivalents.com/ru/материалы/din-en/13mnmo12-5.md tr: https://steelequivalents.com/tr/malzemeler/din-en/13mnmo12-5.md zh: https://steelequivalents.com/zh/材料/din-en/13mnmo12-5.md ja: https://steelequivalents.com/ja/材料/din-en/13mnmo12-5.md ar: https://steelequivalents.com/ar/المواد/din-en/13mnmo12-5.md ko: https://steelequivalents.com/ko/재료/din-en/13mnmo12-5.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/13mnmo12-5.md hi: https://steelequivalents.com/hi/सामग्री/din-en/13mnmo12-5.md content_hash: sha256:dffff379f6e7eb63e370554f4b49a318441038e190d5c4397b12e70e05a774f7 generated: 2026-09-21 --- > **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/13mnmo12-5 > Canonical URL: https://steelequivalents.com/materials/din-en/13mnmo12-5 > 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 # 13MnMo12-5 13MnMo12-5 is a material in the category [Heat-resistant structural steels](/categories/heat-resistant-structural-steels "Heat-resistant structural steels"), held under material number 1.5428. Its recorded composition includes C 0.08–0.17%, Si 0.15–0.3%, P 0.03%, Mn 2.8–3.2% and Mo 0.45–0.6%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.5428**](/materials/material-no/1.5428 "Material no.: 1.5428") - [*Category* **Heat-resistant structural steels · 62 grades**](/categories/heat-resistant-structural-steels "Category: Heat-resistant structural steels · 62 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=8c8c40e4-2b9f-4508-a53c-dd2c37e40fa6&designation=bd4f1590-9fcc-459f-b4c0-3d34d6c582c6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/13mnmo12-5.pdf "Datasheet as PDF") ## About Heat-resistant structural steels Heat-resistant structural steels are structural steels designed to retain useful strength and dimensional stability at elevated temperatures. They are used for load-bearing components in hot-service equipment where mechanical performance must be maintained during heating. 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 Mo Si Iron — the balance, never listed by a standard — 96.1 % Mn — 3 % Mo — 0.5 % Si — 0.2 % Traces & impurities · 0.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.08–0.17 | | Si | 0.15–0.3 | | Mn | 2.8–3.2 — Unusual | | P | 0.03 | | S | 0.03 | | Mo | 0.45–0.6 | Carbon Silicon Manganese Phosphorus Sulfur Molybdenum 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 | 0,08-0,17 | 0.080 | 0.170 | Range | | Si | 0,15-0,30 | 0.150 | 0.300 | Range | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Mn | 2,80-3,20 | 2.800 | 3.200 | Range | | Mo | 0,45-0,60 | 0.450 | 0.600 | Range | 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. ## 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=8c8c40e4-2b9f-4508-a53c-dd2c37e40fa6&designation=bd4f1590-9fcc-459f-b4c0-3d34d6c582c6 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/13mnmo12-5.pdf "Datasheet as PDF")