--- title: "21MnCr5-4 — High-strength steels" description: "21MnCr5-4: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/21mncr5-4 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/21mncr5-4.md cs: https://steelequivalents.com/cs/materiály/din-en/21mncr5-4.md de: https://steelequivalents.com/de/werkstoffe/din-en/21mncr5-4.md es: https://steelequivalents.com/es/materiales/din-en/21mncr5-4.md fr: https://steelequivalents.com/fr/matériaux/din-en/21mncr5-4.md hu: https://steelequivalents.com/hu/anyagok/din-en/21mncr5-4.md it: https://steelequivalents.com/it/materiali/din-en/21mncr5-4.md nl: https://steelequivalents.com/nl/materialen/din-en/21mncr5-4.md pl: https://steelequivalents.com/pl/materiały/din-en/21mncr5-4.md pt: https://steelequivalents.com/pt/materiais/din-en/21mncr5-4.md ru: https://steelequivalents.com/ru/материалы/din-en/21mncr5-4.md tr: https://steelequivalents.com/tr/malzemeler/din-en/21mncr5-4.md zh: https://steelequivalents.com/zh/材料/din-en/21mncr5-4.md ja: https://steelequivalents.com/ja/材料/din-en/21mncr5-4.md ar: https://steelequivalents.com/ar/المواد/din-en/21mncr5-4.md ko: https://steelequivalents.com/ko/재료/din-en/21mncr5-4.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/21mncr5-4.md hi: https://steelequivalents.com/hi/सामग्री/din-en/21mncr5-4.md content_hash: sha256:ebb47e992bbdf1853f0ee8e434a194c8f4eb522f7d1bfac6998c869d859dfc39 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/21mncr5-4 > Canonical URL: https://steelequivalents.com/materials/din-en/21mncr5-4 > 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 # 21MnCr5-4 21MnCr5-4 is a material in the category [High-strength steels](/categories/high-strength-steels "High-strength steels"), held under material number 1.8702. Its recorded composition includes C ≤ 0.25%, Si ≤ 0.7%, P 0.035%, Cr 0.5–1.2% and Mn ≤ 1.7%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.8702**](/materials/material-no/1.8702 "Material no.: 1.8702") - [*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=b5e52d94-1a5b-4072-99f8-ff99f43a4a17&designation=6d096b33-122d-4ac0-83da-a0e2d2da567b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/21mncr5-4.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 Cr Si Iron — the balance, never listed by a standard — 96.4 % Mn — 1.7 % Cr — 0.9 % Si — 0.7 % Traces & impurities · 0.3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.25 | | Si | ≤ 0.7 | | Mn | ≤ 1.7 | | P | 0.035 | | S | 0.035 | | Cr | 0.5–1.2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | ≤0,25 | — | 0.250 | Max | | Si | ≤0,70 | — | 0.700 | Max | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 0,50-1,20 | 0.500 | 1.200 | Range | | Mn | ≤1,70 | — | 1.700 | Max | 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, 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. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.8, a shared category, and a published range for Cr / Mn 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. [20MnCr5-3 1.8701 Cr 0,50-1,20 · Mn ≤1,60 - ΔCr 0.00 - ΔMn 0.05 - 1 designations](/materials/din-en/20mncr5-3 "20MnCr5-3")[S890QL1 1.8925 Cr ≤1,50 · Mn ≤1,70 - ΔCr 0.10 - ΔMn 0.00 - 2 designations](/materials/din-en/s890ql1 "S890QL1")[FeE690VKT 1.8928 Cr ≤1,50 · Mn ≤1,70 - ΔCr 0.10 - ΔMn 0.00 - 17 designations](/materials/din-en/fee690vkt "FeE690VKT")[S690Q 1.8931 Cr ≤1,50 · Mn ≤1,70 - ΔCr 0.10 - ΔMn 0.00 - 5 designations](/materials/din-en/s690q "S690Q")[S960QL 1.8933 Cr ≤1,50 · Mn ≤1,70 - ΔCr 0.10 - ΔMn 0.00 - 4 designations](/materials/din-en/s960ql "S960QL")[S890QL 1.8983 Cr ≤1,50 · Mn ≤1,70 - ΔCr 0.10 - ΔMn 0.00 - 2 designations](/materials/din-en/s890ql "S890QL") ## 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=b5e52d94-1a5b-4072-99f8-ff99f43a4a17&designation=6d096b33-122d-4ac0-83da-a0e2d2da567b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/21mncr5-4.pdf "Datasheet as PDF")