--- title: "1.5424 — Heat-resistant structural steels" description: "1.5424 is the material number of the grade also listed as 10MnMo4-5. Category: Heat-resistant structural steels. Designations recorded for this grade: 1." canonical: https://steelequivalents.com/materials/material-no/1.5424 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.5424.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.5424.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.5424.md es: https://steelequivalents.com/es/materiales/número-de-material/1.5424.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.5424.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.5424.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.5424.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.5424.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.5424.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.5424.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.5424.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.5424.md zh: https://steelequivalents.com/zh/材料/材料编号/1.5424.md ja: https://steelequivalents.com/ja/材料/材料番号/1.5424.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.5424.md ko: https://steelequivalents.com/ko/재료/재료번호/1.5424.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.5424.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.5424.md content_hash: sha256:392116b56646fbd5393a21a909517ff9aabd570870a58b0d840f8537f5afa9e2 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/material-no/1.5424 > Canonical URL: https://steelequivalents.com/materials/material-no/1.5424 > 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. Material number · Europe · 1 designation # 1.5424 1.5424 is the material number of the grade also listed as 10MnMo4-5. It is a material in the category Heat-resistant structural steels. We list 1 designations recorded for this grade, in the standards DIN / EN. - ***Material no.* **1.5424**** - [*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=6914d609-f3e8-42a0-aa92-fb7ca479594c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.5424.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN 10MnMo4-5 This grade’s own name](/materials/din-en/10mnmo4-5 "DIN / EN 10MnMo4-5") ## 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. ## Also known as 1 designations · 1 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. DIN / EN Europe · 1 - [10MnMo4-5 This grade’s own name](/materials/din-en/10mnmo4-5 "DIN / EN 10MnMo4-5") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 10 elements on file · weight % What this alloy is Fe Mn Si Mo Iron — the balance, never listed by a standard — 97.1 % Mn — 1.1 % Si — 0.7 % Mo — 0.6 % Traces & impurities · 0.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.08–0.12 | | Si | 0.55–0.75 — Unusual | | Mn | 0.95–1.25 | | P | 0.02 | | S | 0.02 | | Cr | ≤ 0.12 | | Mo | 0.48–0.62 | | Ni | 0.12 | | Cu | ≤ 0.17 | | Al | ≤ 0.03 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Copper 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 | 0,08-0,12 | 0.080 | 0.120 | Range | | Al | ≤0,030 | — | 0.030 | Max | | Si | 0,55-0,75 | 0.550 | 0.750 | Range | | P | 0,02 | 0.020 | 0.020 | Exact | | S | 0,02 | 0.020 | 0.020 | Exact | | Cr | ≤0,12 | — | 0.120 | Max | | Mn | 0,95-1,25 | 0.950 | 1.250 | Range | | Ni | 0,12 | 0.120 | 0.120 | Exact | | Cu | ≤0,17 | — | 0.170 | Max | | Mo | 0,48-0,62 | 0.480 | 0.620 | 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 computed from composition · °C Predicted Ae3 847 °C Predicted Ae1 723 °C Predicted Acm 369 °C Predicted Bs 555 °C These four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either. ## 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. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.5, a shared category, and a published range for Mn / Si that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade. [10MnMoCrV4-7 1.5407 Mn 0,70-1,10 · Si 0,40-0,70 - ΔMn 0.20 - ΔSi 0.10 - 1 designations](/materials/din-en/10mnmocrv4-7 "10MnMoCrV4-7")[G18Mo5 1.5422 Mn 0,80-1,20 · Si ≤0,60 - ΔMn 0.10 - ΔSi 0.35 - 1 designations](/materials/din-en/g18mo5 "G18Mo5")[26MnMoB6-4 1.5465 Mn 1,25-1,50 · Si 0,30-0,60 - ΔMn 0.27 - ΔSi 0.20 - 1 designations](/materials/din-en/26mnmob6-4 "26MnMoB6-4")[G20Mo5 1.5419 Mn 0,50-1,00 · Si ≤0,60 - ΔMn 0.35 - ΔSi 0.35 - 6 designations](/materials/din-en/g20mo5 "G20Mo5")[G10MnMoV6-3 1.5410 Mn 1,20-1,80 · Si ≤0,60 - ΔMn 0.40 - ΔSi 0.35 - 1 designations](/materials/din-en/g10mnmov6-3 "G10MnMoV6-3") ## 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=6914d609-f3e8-42a0-aa92-fb7ca479594c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.5424.pdf "Datasheet as PDF")