--- title: "17342 — Stainless steels" description: "17342 in ČSN: material number 1.4539, also listed as X1NiCrMoCu25-20-5. Category: Stainless steels. Designations recorded for this grade: 23." canonical: https://steelequivalents.com/materials/csn/17342 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/csn/17342.md cs: https://steelequivalents.com/cs/materiály/csn/17342.md de: https://steelequivalents.com/de/werkstoffe/csn/17342.md es: https://steelequivalents.com/es/materiales/csn/17342.md fr: https://steelequivalents.com/fr/matériaux/csn/17342.md hu: https://steelequivalents.com/hu/anyagok/csn/17342.md it: https://steelequivalents.com/it/materiali/csn/17342.md nl: https://steelequivalents.com/nl/materialen/csn/17342.md pl: https://steelequivalents.com/pl/materiały/csn/17342.md pt: https://steelequivalents.com/pt/materiais/csn/17342.md ru: https://steelequivalents.com/ru/материалы/csn/17342.md tr: https://steelequivalents.com/tr/malzemeler/csn/17342.md zh: https://steelequivalents.com/zh/材料/csn/17342.md ja: https://steelequivalents.com/ja/材料/csn/17342.md ar: https://steelequivalents.com/ar/المواد/csn/17342.md ko: https://steelequivalents.com/ko/재료/csn/17342.md pt-br: https://steelequivalents.com/pt-br/materiais/csn/17342.md hi: https://steelequivalents.com/hi/सामग्री/csn/17342.md content_hash: sha256:6bc2631c5f9f0634b2616b15243eb58909c6a686b1a6070297dd0fca91875617 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/csn/17342 > Canonical URL: https://steelequivalents.com/materials/csn/17342 > 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 · 23 designations # 17342 17342 is a designation in ČSN for the material held under material number 1.4539, also listed as X1NiCrMoCu25-20-5. It is a material in the category Stainless steels. We list 23 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, JIS, SS, ČSN, PN and STN. - [*Material no.* **1.4539**](/materials/material-no/1.4539 "Material no.: 1.4539") - [*Category* **Stainless steels · 468 grades**](/categories/stainless-steels "Category: Stainless steels · 468 grades") - *Designations* **23** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=0d1169b6-a466-4333-8ffa-35ec7b127e70&designation=a8dcde5d-a22a-4207-b438-919539720162 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/17342.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X1NiCrMoCu25-20-5 This grade’s own name](/materials/din-en/x1nicrmocu25-20-5 "DIN / EN X1NiCrMoCu25-20-5") ## About Stainless steels Stainless steels are corrosion-resistant alloy steels whose chromium content promotes a protective passive surface film. They are used for equipment, structures and components exposed to moisture, chemicals or hygienic service, with different alloy compositions selected for corrosion resistance, strength, formability or weldability. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 23 designations · 11 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 · 2 - [1.4539 Indicative](/materials/material-no/1.4539 "DIN / EN 1.4539") - [X1NiCrMoCu25-20-5 This grade’s own name](/materials/din-en/x1nicrmocu25-20-5 "DIN / EN X1NiCrMoCu25-20-5") UNS United States · 1 - [N08904 Indicative](/materials/uns/n08904 "UNS N08904") AISI / SAE United States · 7 - [904L Indicative](/materials/aisi-sae/904l "AISI / SAE 904L") - [N08904 Indicative](/materials/uns/n08904 "AISI / SAE N08904") - [NO8904 Indicative](/materials/aisi-sae/no8904 "AISI / SAE NO8904") - [UNS N08904 Indicative](/materials/aisi-sae/uns-n08904 "AISI / SAE UNS N08904") - [UNS V Indicative](/materials/aisi-sae/uns-v "AISI / SAE UNS V") - [UNS V 0890A Indicative](/materials/aisi-sae/uns-v-0890a "AISI / SAE UNS V 0890A") - [UNS8904 Indicative](/materials/aisi-sae/uns8904 "AISI / SAE UNS8904") ASTM United States · 1 - [N 08904 Indicative](/materials/uns/n08904 "ASTM N 08904") BS United Kingdom · 1 - [904S13 Indicative](/materials/bs/904s13 "BS 904S13") AFNOR France · 3 - [Z1NCDU25.20 Indicative](/materials/afnor/z1ncdu25-20 "AFNOR Z1NCDU25.20") - [Z2NCDU25-20 Indicative](/materials/afnor/z2ncdu25-20 "AFNOR Z2NCDU25-20") - [Z6CNT18.10 Indicative](/materials/afnor/z6cnt18-10 "AFNOR Z6CNT18.10") JIS Japan · 3 - [F SUS 317 J5L Indicative](/materials/jis/f-sus-317-j5l "JIS F SUS 317 J5L") - [SUS 317 J5L TK Indicative](/materials/jis/sus-317-j5l-tk "JIS SUS 317 J5L TK") - [SUS 317 J5L TP Indicative](/materials/jis/sus-317-j5l-tp "JIS SUS 317 J5L TP") SS Sweden · 1 - [2562 Indicative](/materials/ss/2562 "SS 2562") ČSN Czechia · 1 - **17342 Indicative** PN Poland · 2 - [00H22N24M4TCu Indicative](/materials/pn/00h22n24m4tcu "PN 00H22N24M4TCu") - [0H22N24M4TCu Indicative](/materials/pn/0h22n24m4tcu "PN 0H22N24M4TCu") STN Slovakia · 1 - **17 342 Indicative** Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 10 elements on file · weight % What this alloy is Fe Ni Cr Mo Iron — the balance, never listed by a standard — 46 % Ni — 25 % Cr — 20 % Mo — 4.5 % Traces & impurities · 4.5 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.02 | | Si | ≤ 0.7 | | Mn | ≤ 2 | | P | 0.03 | | S | 0.01 | | Cr | 19–21 | | Mo | 4–5 | | Ni | 24–26 — Unusual | | Cu | 1.2–2 | | N | 0.15 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Copper Nitrogen 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 | ≤0,02 | — | 0.020 | Max | | N | 0,15 | 0.150 | 0.150 | Exact | | Si | ≤0,70 | — | 0.700 | Max | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,01 | 0.010 | 0.010 | Exact | | Cr | 19,0-21,0 | 19.000 | 21.000 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 24,0-26,0 | 24.000 | 26.000 | Range | | Cu | 1,20-2,00 | 1.200 | 2.000 | Range | | Mo | 4,00-5,00 | 4.000 | 5.000 | 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 This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## Physical & mechanical properties Density 8 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 · 2 values By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 230 | By delivery state**Solution annealed** source `steelnumber` | Delivery state | HB | |---|---| | Solution annealed | 220 | 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 1.4, a shared category, and a published range for Ni / Cr 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. [NO8367 1.4529 Ni 24,0-26,0 · Cr 19,0-21,0 - ΔNi 0.00 - ΔCr 0.00 - 28 designations](/materials/din-en/no8367 "NO8367") ## 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=0d1169b6-a466-4333-8ffa-35ec7b127e70&designation=a8dcde5d-a22a-4207-b438-919539720162 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/csn/17342.pdf "Datasheet as PDF")