--- title: "A182F44 — Stainless steels" description: "A182F44 in ASTM: material number 1.4547, also listed as X1CrNiMoCuN20-18-7. Category: Stainless steels. Designations recorded for this grade: 15." canonical: https://steelequivalents.com/materials/astm/a182f44 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/astm/a182f44.md cs: https://steelequivalents.com/cs/materiály/astm/a182f44.md de: https://steelequivalents.com/de/werkstoffe/astm/a182f44.md es: https://steelequivalents.com/es/materiales/astm/a182f44.md fr: https://steelequivalents.com/fr/matériaux/astm/a182f44.md hu: https://steelequivalents.com/hu/anyagok/astm/a182f44.md it: https://steelequivalents.com/it/materiali/astm/a182f44.md nl: https://steelequivalents.com/nl/materialen/astm/a182f44.md pl: https://steelequivalents.com/pl/materiały/astm/a182f44.md pt: https://steelequivalents.com/pt/materiais/astm/a182f44.md ru: https://steelequivalents.com/ru/материалы/astm/a182f44.md tr: https://steelequivalents.com/tr/malzemeler/astm/a182f44.md zh: https://steelequivalents.com/zh/材料/astm/a182f44.md ja: https://steelequivalents.com/ja/材料/astm/a182f44.md ar: https://steelequivalents.com/ar/المواد/astm/a182f44.md ko: https://steelequivalents.com/ko/재료/astm/a182f44.md pt-br: https://steelequivalents.com/pt-br/materiais/astm/a182f44.md hi: https://steelequivalents.com/hi/सामग्री/astm/a182f44.md content_hash: sha256:90f23f5698d3bff057842da057435542a4809e51e0fd69e032a8e32078b491f9 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/astm/a182f44 > Canonical URL: https://steelequivalents.com/materials/astm/a182f44 > 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. ASTM · United States · 15 designations # A182F44 A182F44 is a designation in ASTM for the material held under material number 1.4547, also listed as X1CrNiMoCuN20-18-7. It is a material in the category Stainless steels. We list 15 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, AFNOR, GB, SS and ČSN. - [*Material no.* **1.4547**](/materials/material-no/1.4547 "Material no.: 1.4547") - [*Category* **Stainless steels · 468 grades**](/categories/stainless-steels "Category: Stainless steels · 468 grades") - *Designations* **15** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=723daa17-18b3-44b4-becd-abb354acd623&designation=5bb4af49-dd81-4201-9aae-6108a75515d9 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/a182f44.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X1CrNiMoCuN20-18-7 This grade’s own name](/materials/din-en/x1crnimocun20-18-7 "DIN / EN X1CrNiMoCuN20-18-7") - [UNS S31254 This grade’s own name · 3 grades on that route](/materials/uns/s31254 "UNS S31254") - [AISI / SAE 254SMO This grade’s own name](/materials/aisi-sae/254smo "AISI / SAE 254SMO") ## 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 15 designations · 8 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 - [1.4547 Indicative](/materials/material-no/1.4547 "DIN / EN 1.4547") - [X1CrNiMoCuN20-18-7 This grade’s own name](/materials/din-en/x1crnimocun20-18-7 "DIN / EN X1CrNiMoCuN20-18-7") UNS United States · 2 - [S31250 Indicative](/materials/uns/s31250 "UNS S31250") - [S31254 This grade’s own name](/materials/uns/s31254 "UNS S31254") AISI / SAE United States · 2 - [254SMO This grade’s own name](/materials/aisi-sae/254smo "AISI / SAE 254SMO") - [S31254 Indicative](/materials/uns/s31254 "AISI / SAE S31254") ASTM United States · 1 - **A182F44 This grade’s own name** AFNOR France · 5 - [DMV 420 Indicative](/materials/afnor/dmv-420 "AFNOR DMV 420") - [DMV 4335 Indicative](/materials/afnor/dmv-4335 "AFNOR DMV 4335") - [DMV 954 Indicative](/materials/afnor/dmv-954 "AFNOR DMV 954") - [Z1CNDU20.18.06AZ Indicative](/materials/afnor/z1cndu20-18-06az "AFNOR Z1CNDU20.18.06AZ") - [Z2CNDU20-18-7Az Indicative](/materials/afnor/z2cndu20-18-7az "AFNOR Z2CNDU20-18-7Az") GB China · 1 - [00Cr20Ni18Mo6CuN Indicative](/materials/gb/00cr20ni18mo6cun "GB 00Cr20Ni18Mo6CuN") SS Sweden · 1 - [2378 Indicative](/materials/ss/2378 "SS 2378") ČSN Czechia · 1 - [17 348 Indicative](/materials/csn/17348 "ČSN 17 348") 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 Cr Ni Mo Iron — the balance, never listed by a standard — 52.8 % Cr — 20 % Ni — 18 % Mo — 6.5 % Traces & impurities · 2.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.02 | | Si | ≤ 0.7 | | Mn | ≤ 1 | | P | 0.03 | | S | 0.01 | | Cr | 19.5–20.5 | | Mo | 6–7 — Unusual | | Ni | 17.5–18.5 | | Cu | 0.5–1 | | N | 0.18–0.25 | 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 | 0,18-0,25 | 0.180 | 0.250 | Range | | Si | ≤0,70 | — | 0.700 | Max | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,01 | 0.010 | 0.010 | Exact | | Cr | 19,5-20,5 | 19.500 | 20.500 | Range | | Mn | ≤1,00 | — | 1.000 | Max | | Ni | 17,5-18,5 | 17.500 | 18.500 | Range | | Cu | 0,50-1,00 | 0.500 | 1.000 | Range | | Mo | 6,00-7,00 | 6.000 | 7.000 | 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 | 260 | 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 Cr / Ni 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. [X2CrNiMoN18-15-5 1.4483 Cr 17,0-20,0 · Ni 13,5-17,5 - ΔCr 1.50 - ΔNi 2.50 - 3 designations](/materials/din-en/x2crnimon18-15-5 "X2CrNiMoN18-15-5") ## 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=723daa17-18b3-44b4-becd-abb354acd623&designation=5bb4af49-dd81-4201-9aae-6108a75515d9 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/a182f44.pdf "Datasheet as PDF")