--- title: "X21Cr13 — Tool steels for hot work" description: "X21Cr13: 4 equivalent designations across 3 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/x21cr13 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/x21cr13.md cs: https://steelequivalents.com/cs/materiály/din-en/x21cr13.md de: https://steelequivalents.com/de/werkstoffe/din-en/x21cr13.md es: https://steelequivalents.com/es/materiales/din-en/x21cr13.md fr: https://steelequivalents.com/fr/matériaux/din-en/x21cr13.md hu: https://steelequivalents.com/hu/anyagok/din-en/x21cr13.md it: https://steelequivalents.com/it/materiali/din-en/x21cr13.md nl: https://steelequivalents.com/nl/materialen/din-en/x21cr13.md pl: https://steelequivalents.com/pl/materiały/din-en/x21cr13.md pt: https://steelequivalents.com/pt/materiais/din-en/x21cr13.md ru: https://steelequivalents.com/ru/материалы/din-en/x21cr13.md tr: https://steelequivalents.com/tr/malzemeler/din-en/x21cr13.md zh: https://steelequivalents.com/zh/材料/din-en/x21cr13.md ja: https://steelequivalents.com/ja/材料/din-en/x21cr13.md ar: https://steelequivalents.com/ar/المواد/din-en/x21cr13.md ko: https://steelequivalents.com/ko/재료/din-en/x21cr13.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/x21cr13.md hi: https://steelequivalents.com/hi/सामग्री/din-en/x21cr13.md content_hash: sha256:bd4559a7e4a7aaf334163de7403d95dc88e4c53a12acd19ee3b9bbd7a462654f generated: 2026-09-22 --- > **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/x21cr13 > Canonical URL: https://steelequivalents.com/materials/din-en/x21cr13 > 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 · 4 designations # X21Cr13 X21Cr13 is a material in the category [Tool steels for hot work](/categories/tool-steels-for-hot-work "Tool steels for hot work"), held under material number 1.2082. Its recorded composition includes C 0.17–0.22%, Si 0.3–0.5%, P 0.035%, Cr 12.5–13.5% and Mn 0.2–0.4%. We list 3 designations recorded for this grade, in the standards AISI / SAE and ČSN. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.2082**](/materials/material-no/1.2082 "Material no.: 1.2082") - [*Category* **Tool steels for hot work · 37 grades**](/categories/tool-steels-for-hot-work "Category: Tool steels for hot work · 37 grades") - *Designations* **4** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=db5dc38f-2bbe-43db-8770-4208a5bd6c11&designation=7a04fc8a-2995-4d3c-9f06-c8137646ce27 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x21cr13.pdf "Datasheet as PDF") ## About Tool steels for hot work Tool steels for hot work are alloy steels designed for tooling that operates in contact with heated metal. They are characterised by hot hardness, wear resistance, toughness and resistance to thermal fatigue, making them suitable for dies, moulds, punches and other forging, extrusion and die-casting tools. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 4 designations · 3 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 - **X21Cr13 This grade’s own name** AISI / SAE United States · 1 - [420 Indicative](/materials/is/420 "AISI / SAE 420") ČSN Czechia · 2 - [17 022 Indicative](/materials/csn/17022 "ČSN 17 022") - [19 434 Indicative](/materials/csn/19-434 "ČSN 19 434") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Cr Si Mn Iron — the balance, never listed by a standard — 86 % Cr — 13 % Si — 0.4 % Mn — 0.3 % Traces & impurities · 0.3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.17–0.22 | | Si | 0.3–0.5 | | Mn | 0.2–0.4 | | P | 0.035 | | S | 0.035 | | Cr | 12.5–13.5 | 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 | 0,17-0,22 | 0.170 | 0.220 | Range | | Si | 0,30-0,50 | 0.300 | 0.500 | Range | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 12,5-13,5 | 12.500 | 13.500 | Range | | Mn | 0,20-0,40 | 0.200 | 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, 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 1.2, a shared category, and a published range for Cr / 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. [X6NiCrTi26-15 1.2779 Cr 13,5-16,0 · Si ≤1,00 - ΔCr 1.75 - ΔSi 0.10 - 15 designations](/materials/din-en/x6nicrti26-15 "X6NiCrTi26-15") ## 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=db5dc38f-2bbe-43db-8770-4208a5bd6c11&designation=7a04fc8a-2995-4d3c-9f06-c8137646ce27 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/x21cr13.pdf "Datasheet as PDF")