--- title: "19 559 — Tool steels for cold work" description: "19 559 in ČSN: material number 1.2631, also listed as X50CrMoW9-1-1. Category: Tool steels for cold work. Designations recorded for this grade: 4." canonical: https://steelequivalents.com/materials/csn/19-559 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/csn/19-559.md cs: https://steelequivalents.com/cs/materiály/csn/19-559.md de: https://steelequivalents.com/de/werkstoffe/csn/19-559.md es: https://steelequivalents.com/es/materiales/csn/19-559.md fr: https://steelequivalents.com/fr/matériaux/csn/19-559.md hu: https://steelequivalents.com/hu/anyagok/csn/19-559.md it: https://steelequivalents.com/it/materiali/csn/19-559.md nl: https://steelequivalents.com/nl/materialen/csn/19-559.md pl: https://steelequivalents.com/pl/materiały/csn/19-559.md pt: https://steelequivalents.com/pt/materiais/csn/19-559.md ru: https://steelequivalents.com/ru/материалы/csn/19-559.md tr: https://steelequivalents.com/tr/malzemeler/csn/19-559.md zh: https://steelequivalents.com/zh/材料/csn/19-559.md ja: https://steelequivalents.com/ja/材料/csn/19-559.md ar: https://steelequivalents.com/ar/المواد/csn/19-559.md ko: https://steelequivalents.com/ko/재료/csn/19-559.md pt-br: https://steelequivalents.com/pt-br/materiais/csn/19-559.md hi: https://steelequivalents.com/hi/सामग्री/csn/19-559.md content_hash: sha256:246c39cf9276719fbffb49d67ddd148c8c062d14bfa1db420dac51ee30d035be 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/csn/19-559 > Canonical URL: https://steelequivalents.com/materials/csn/19-559 > 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. ČSN · Czechia · 4 designations # 19 559 19 559 is a designation in ČSN for the material held under material number 1.2631, also listed as X50CrMoW9-1-1. It is a material in the category Tool steels for cold work. We list 4 designations recorded for this grade, in the standards DIN / EN, ČSN and SRPS. - [*Material no.* **1.2631**](/materials/material-no/1.2631 "Material no.: 1.2631") - [*Category* **Tool steels for cold work · 109 grades**](/categories/tool-steels-for-cold-work "Category: Tool steels for cold work · 109 grades") - *Designations* **4** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=7725e257-17b8-4e86-abc5-cf7d83c88f0b&designation=c4d7decd-7ebc-4743-99d4-7a2084e25b36 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/19-559.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X50CrMoW9-1-1 This grade’s own name](/materials/din-en/x50crmow9-1-1 "DIN / EN X50CrMoW9-1-1") ## About Tool steels for cold work Cold-work tool steels are high-strength tool materials designed for shaping, cutting and forming operations carried out without significant heating of the workpiece. They are characterised by high hardness, wear resistance and the ability to retain a sharp or precise working edge, making them suitable for dies, punches, cutting tools and other tooling exposed to repeated mechanical contact. 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 - [X50CrMoW9-1-1 This grade’s own name](/materials/din-en/x50crmow9-1-1 "DIN / EN X50CrMoW9-1-1") ČSN Czechia · 2 - **19 559 Indicative** - [19 559 PH Indicative](/materials/csn/19-559-ph "ČSN 19 559 PH") SRPS Serbia · 1 - [Č.4755 Indicative](/materials/srps/c-4755 "SRPS Č.4755") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 8 elements on file · weight % What this alloy is Fe Cr Mo W Iron — the balance, never listed by a standard — 87.1 % Cr — 8.5 % Mo — 1.2 % W — 1.2 % Traces & impurities · 2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.45–0.55 | | Si | 0.8–1 | | Mn | 0.4–0.6 | | P | 0.035 | | S | 0.035 | | Cr | 8–9 | | Mo | 1.1–1.3 | | W | 1.1–1.3 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Tungsten 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 | 0,45-0,55 | 0.450 | 0.550 | Range | | Si | 0,80-1,00 | 0.800 | 1.000 | Range | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Cr | 8,00-9,00 | 8.000 | 9.000 | Range | | Mn | 0,40-0,60 | 0.400 | 0.600 | Range | | Mo | 1,10-1,30 | 1.100 | 1.300 | Range | | W | 1,10-1,30 | 1.100 | 1.300 | 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. ## 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=7725e257-17b8-4e86-abc5-cf7d83c88f0b&designation=c4d7decd-7ebc-4743-99d4-7a2084e25b36 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/19-559.pdf "Datasheet as PDF")