--- title: "19 555 — Tool steels for hot work" description: "19 555 in ČSN: material number 1.2605, also listed as X35CrWMoV5. Category: Tool steels for hot work. Designations recorded for this grade: 7." canonical: https://steelequivalents.com/materials/csn/19-555 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/csn/19-555.md cs: https://steelequivalents.com/cs/materiály/csn/19-555.md de: https://steelequivalents.com/de/werkstoffe/csn/19-555.md es: https://steelequivalents.com/es/materiales/csn/19-555.md fr: https://steelequivalents.com/fr/matériaux/csn/19-555.md hu: https://steelequivalents.com/hu/anyagok/csn/19-555.md it: https://steelequivalents.com/it/materiali/csn/19-555.md nl: https://steelequivalents.com/nl/materialen/csn/19-555.md pl: https://steelequivalents.com/pl/materiały/csn/19-555.md pt: https://steelequivalents.com/pt/materiais/csn/19-555.md ru: https://steelequivalents.com/ru/материалы/csn/19-555.md tr: https://steelequivalents.com/tr/malzemeler/csn/19-555.md zh: https://steelequivalents.com/zh/材料/csn/19-555.md ja: https://steelequivalents.com/ja/材料/csn/19-555.md ar: https://steelequivalents.com/ar/المواد/csn/19-555.md ko: https://steelequivalents.com/ko/재료/csn/19-555.md pt-br: https://steelequivalents.com/pt-br/materiais/csn/19-555.md hi: https://steelequivalents.com/hi/सामग्री/csn/19-555.md content_hash: sha256:2a878cf8b7b1cb4d816f87e865bc73c1695eb4b6494b11d4ac1537fdda3e413f 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/19-555 > Canonical URL: https://steelequivalents.com/materials/csn/19-555 > 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 · 7 designations # 19 555 19 555 is a designation in ČSN for the material held under material number 1.2605, also listed as X35CrWMoV5. It is a material in the category Tool steels for hot work. We list 7 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ISO, JIS and ČSN. - [*Material no.* **1.2605**](/materials/material-no/1.2605 "Material no.: 1.2605") - [*Category* **Tool steels for hot work · 37 grades**](/categories/tool-steels-for-hot-work "Category: Tool steels for hot work · 37 grades") - *Designations* **7** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=9f760d24-accc-4263-9d43-39539e35b13a&designation=9853178c-d5b5-4191-805a-2a88985753b9 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/19-555.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X35CrWMoV5 This grade’s own name](/materials/din-en/x35crwmov5 "DIN / EN X35CrWMoV5") - [UNS T20812 This grade’s own name · 2 grades on that route](/materials/uns/t20812 "UNS T20812") - [AISI / SAE H12 This grade’s own name · 4 grades on that route](/materials/aisi-sae/h12 "AISI / SAE H12") ## 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 7 designations · 6 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 - [X35CrWMoV5 This grade’s own name](/materials/din-en/x35crwmov5 "DIN / EN X35CrWMoV5") UNS United States · 1 - [T20812 This grade’s own name](/materials/uns/t20812 "UNS T20812") AISI / SAE United States · 1 - [H12 This grade’s own name](/materials/aisi-sae/h12 "AISI / SAE H12") ISO International · 1 - [X35CrMoV5 Indicative](/materials/iso/x35crmov5 "ISO X35CrMoV5") JIS Japan · 1 - [SKD62 Indicative](/materials/jis/skd62 "JIS SKD62") ČSN Czechia · 2 - **19 555 Indicative** - [19 555 PH Indicative](/materials/csn/19-555-ph "ČSN 19 555 PH") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 9 elements on file · weight % What this alloy is Fe Cr Mo W Iron — the balance, never listed by a standard — 90 % Cr — 5.1 % Mo — 1.4 % W — 1.4 % Traces & impurities · 2.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.32–0.4 | | Si | 0.8–1.2 | | Mn | 0.2–0.5 | | P | 0.03 | | S | 0.02 | | Cr | 4.75–5.5 | | Mo | 1.25–1.6 | | V | 0.2–0.5 | | W | 1.1–1.6 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Vanadium 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 | 0,32-0,40 | 0.320 | 0.400 | Range | | Si | 0,80-1,20 | 0.800 | 1.200 | Range | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,02 | 0.020 | 0.020 | Exact | | V | 0,20-0,50 | 0.200 | 0.500 | Range | | Cr | 4,75-5,50 | 4.750 | 5.500 | Range | | Mn | 0,20-0,50 | 0.200 | 0.500 | Range | | Mo | 1,25-1,60 | 1.250 | 1.600 | Range | | W | 1,10-1,60 | 1.100 | 1.600 | 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. ## Properties by condition 2 conditions · 3 values By delivery state**no delivery state stated** source `steeljis` | Delivery state | HB | HRC | |---|---|---| | Annealed | 229 | — | | Quenched and tempered | — | 48 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 229 | Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## 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 / 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. [1.2344 1.2344 Cr 4,80-5,50 · Mo 1,20-1,50 - ΔCr 0.03 - ΔMo 0.07 - 49 designations](/materials/material-no/1.2344 "1.2344")[X37CrMoV5-1 1.2343 Cr 4,80-5,50 · Mo 1,10-1,50 - ΔCr 0.03 - ΔMo 0.13 - 42 designations](/materials/din-en/x37crmov5-1 "X37CrMoV5-1")[X50CrMoV5-1 1.2345 Cr 4,80-5,20 · Mo 1,25-1,45 - ΔCr 0.13 - ΔMo 0.07 - 4 designations](/materials/din-en/x50crmov5-1 "X50CrMoV5-1")[X37CrMoW5-1 1.2606 Cr 5,00-5,60 · Mo 1,30-1,60 - ΔCr 0.17 - ΔMo 0.03 - 11 designations](/materials/din-en/x37crmow5-1 "X37CrMoW5-1") ## 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=9f760d24-accc-4263-9d43-39539e35b13a&designation=9853178c-d5b5-4191-805a-2a88985753b9 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/19-555.pdf "Datasheet as PDF")