--- title: "22Mo4 — Heat-resistant structural steels" description: "22Mo4: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/22mo4 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/22mo4.md cs: https://steelequivalents.com/cs/materiály/din-en/22mo4.md de: https://steelequivalents.com/de/werkstoffe/din-en/22mo4.md es: https://steelequivalents.com/es/materiales/din-en/22mo4.md fr: https://steelequivalents.com/fr/matériaux/din-en/22mo4.md hu: https://steelequivalents.com/hu/anyagok/din-en/22mo4.md it: https://steelequivalents.com/it/materiali/din-en/22mo4.md nl: https://steelequivalents.com/nl/materialen/din-en/22mo4.md pl: https://steelequivalents.com/pl/materiały/din-en/22mo4.md pt: https://steelequivalents.com/pt/materiais/din-en/22mo4.md ru: https://steelequivalents.com/ru/материалы/din-en/22mo4.md tr: https://steelequivalents.com/tr/malzemeler/din-en/22mo4.md zh: https://steelequivalents.com/zh/材料/din-en/22mo4.md ja: https://steelequivalents.com/ja/材料/din-en/22mo4.md ar: https://steelequivalents.com/ar/المواد/din-en/22mo4.md ko: https://steelequivalents.com/ko/재료/din-en/22mo4.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/22mo4.md hi: https://steelequivalents.com/hi/सामग्री/din-en/22mo4.md content_hash: sha256:2c87c06a9059f32e222f5a354b421a3bb0a05eb6a889df5ad2b1f0dae8bebb60 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/22mo4 > Canonical URL: https://steelequivalents.com/materials/din-en/22mo4 > 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 # 22Mo4 22Mo4 is a material in the category [Heat-resistant structural steels](/categories/heat-resistant-structural-steels "Heat-resistant structural steels"), held under material number 1.5429. Its recorded composition includes C 0.18–0.25%, Si 0.2–0.4%, Cr ≤ 0.3%, Mn 0.4–0.7% and Mo 0.3–0.4%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.5429**](/materials/material-no/1.5429 "Material no.: 1.5429") - [*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=2fea419f-c856-470b-9116-31597424ddce&designation=cfddfed2-0a6b-45dd-acd9-b66b1cbe9518 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/22mo4.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 7 elements on file · weight % What this alloy is Fe Mn Mo Si Iron — the balance, never listed by a standard — 98.2 % Mn — 0.6 % Mo — 0.4 % Si — 0.3 % Traces & impurities · 0.6 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.18–0.25 | | Si | 0.2–0.4 | | Mn | 0.4–0.7 | | P | 0.03 | | S | 0.03 | | Cr | ≤ 0.3 | | Mo | 0.3–0.4 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | 0,18-0,25 | 0.180 | 0.250 | Range | | Si | 0,20-0,40 | 0.200 | 0.400 | Range | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | (≤0,30) | — | 0.300 | Max | | Mn | 0,40-0,70 | 0.400 | 0.700 | Range | | Mo | 0,30-0,40 | 0.300 | 0.400 | 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. ## 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 / Mo 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. [1.5415 1.5415 Mn 0,40-0,90 · Mo 0,25-0,35 - ΔMn 0.10 - ΔMo 0.05 - 38 designations](/materials/material-no/1.5415 "1.5415")[8MoB5-4 1.5450 Mn 0,60-0,80 · Mo 0,40-0,50 - ΔMn 0.15 - ΔMo 0.10 - 1 designations](/materials/din-en/8mob5-4 "8MoB5-4")[37Mo2 1.5418 Mn 0,60-0,90 · Mo 0,20-0,30 - ΔMn 0.20 - ΔMo 0.10 - 1 designations](/materials/din-en/37mo2 "37Mo2")[G20Mo5 1.5419 Mn 0,50-1,00 · Mo 0,40-0,60 - ΔMn 0.20 - ΔMo 0.15 - 6 designations](/materials/din-en/g20mo5 "G20Mo5")[27MnMo3-3 1.5420 Mn 0,60-1,00 · Mo 0,20-0,30 - ΔMn 0.25 - ΔMo 0.10 - 1 designations](/materials/din-en/27mnmo3-3 "27MnMo3-3")[20MnMo3-5 1.5421 Mn 0,70-1,00 · Mo 0,40-0,60 - ΔMn 0.30 - ΔMo 0.15 - 3 designations](/materials/din-en/20mnmo3-5 "20MnMo3-5") ## 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=2fea419f-c856-470b-9116-31597424ddce&designation=cfddfed2-0a6b-45dd-acd9-b66b1cbe9518 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/22mo4.pdf "Datasheet as PDF")