--- title: "F.3211 — Valve steels" description: "F.3211 in UNE: material number 1.4873, also listed as X45CrNiW18-9. Category: Valve steels. Designations recorded for this grade: 25." canonical: https://steelequivalents.com/materials/une/f-3211 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/une/f-3211.md cs: https://steelequivalents.com/cs/materiály/une/f-3211.md de: https://steelequivalents.com/de/werkstoffe/une/f-3211.md es: https://steelequivalents.com/es/materiales/une/f-3211.md fr: https://steelequivalents.com/fr/matériaux/une/f-3211.md hu: https://steelequivalents.com/hu/anyagok/une/f-3211.md it: https://steelequivalents.com/it/materiali/une/f-3211.md nl: https://steelequivalents.com/nl/materialen/une/f-3211.md pl: https://steelequivalents.com/pl/materiały/une/f-3211.md pt: https://steelequivalents.com/pt/materiais/une/f-3211.md ru: https://steelequivalents.com/ru/материалы/une/f-3211.md tr: https://steelequivalents.com/tr/malzemeler/une/f-3211.md zh: https://steelequivalents.com/zh/材料/une/f-3211.md ja: https://steelequivalents.com/ja/材料/une/f-3211.md ar: https://steelequivalents.com/ar/المواد/une/f-3211.md ko: https://steelequivalents.com/ko/재료/une/f-3211.md pt-br: https://steelequivalents.com/pt-br/materiais/une/f-3211.md hi: https://steelequivalents.com/hi/सामग्री/une/f-3211.md content_hash: sha256:3ad39a42bee98e58d1a2f32866dd9a5e7a784fb850b900e37b93a2b431298cc9 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/une/f-3211 > Canonical URL: https://steelequivalents.com/materials/une/f-3211 > 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. UNE · Spain · 25 designations # F.3211 F.3211 is a designation in UNE for the material held under material number 1.4873, also listed as X45CrNiW18-9. It is a material in the category Valve steels. We list 25 designations recorded for this grade, in the standards DIN / EN, BS, AFNOR, UNE, JIS, GOST, ČSN, PN, SRPS, MSZ, STAS and BDS. - [*Material no.* **1.4873**](/materials/material-no/1.4873 "Material no.: 1.4873") - [*Category* **Valve steels · 14 grades**](/categories/valve-steels "Category: Valve steels · 14 grades") - *Designations* **25** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=22a231ef-8541-411c-8369-45b9f9fb9258&designation=3fa60183-b56c-4630-ac88-fed022583047 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/une/f-3211.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X45CrNiW18-9 This grade’s own name](/materials/din-en/x45crniw18-9 "DIN / EN X45CrNiW18-9") ## About Valve steels Valve steels are alloy steels developed for valve components exposed to heat, pressure, wear, and corrosive service conditions. They are characterised by combinations of strength, hardness, toughness, and resistance to oxidation or corrosion suited to the operating environment. Typical uses include engine valves and industrial valve parts where reliable performance and dimensional stability are required. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 25 designations · 12 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 - [X45CrNiW18-9 This grade’s own name](/materials/din-en/x45crniw18-9 "DIN / EN X45CrNiW18-9") BS United Kingdom · 2 - [331S40 Indicative](/materials/bs/331s40 "BS 331S40") - [331S42 Indicative](/materials/bs/331s42 "BS 331S42") AFNOR France · 3 - [X19T4 Indicative](/materials/afnor/x19t4 "AFNOR X19T4") - [Z35CNWS14.14 Indicative](/materials/afnor/z35cnws14-14 "AFNOR Z35CNWS14.14") - [Z45CNW18-09 Indicative](/materials/afnor/z45cnw18-09 "AFNOR Z45CNW18-09") UNE Spain · 5 - [28-09 Indicative](/materials/une/28-09 "UNE 28-09") - [F.320.C Indicative](/materials/une/f-320-c "UNE F.320.C") - **F.3211 Indicative** - [F.3211-X45CrNiSiW Indicative](/materials/une/f-3211-x45crnisiw "UNE F.3211-X45CrNiSiW") - [X 45 CrNiSiW 18-09 Indicative](/materials/une/x-45-crnisiw-18-09 "UNE X 45 CrNiSiW 18-09") JIS Japan · 4 - [F SUH 31 Indicative](/materials/jis/f-suh-31 "JIS F SUH 31") - [SUH 31 Indicative](/materials/jis/suh31 "JIS SUH 31") - [SUH 31 TK Indicative](/materials/jis/suh-31-tk "JIS SUH 31 TK") - [SUH 31 TP Indicative](/materials/jis/suh-31-tp "JIS SUH 31 TP") GOST Russia / CIS · 3 - [45Ch14N14V2M Indicative](/materials/gost/45ch14n14v2m "GOST 45Ch14N14V2M") - [45Kh14N14V2M Indicative](/materials/gost/45kh14n14v2m "GOST 45Kh14N14V2M") - [EL189 Indicative](/materials/gost/el189 "GOST EL189") ČSN Czechia · 1 - [17 322 Indicative](/materials/csn/17-322 "ČSN 17 322") PN Poland · 1 - [4H14N14W2M Indicative](/materials/pn/4h14n14w2m "PN 4H14N14W2M") SRPS Serbia · 1 - [Č.4571.1 Indicative](/materials/srps/c-4571-1 "SRPS Č.4571.1") MSZ Hungary · 1 - [SZ 12 Indicative](/materials/msz/sz-12 "MSZ SZ 12") STAS Romania · 1 - [45WNiCr180 Indicative](/materials/stas/45wnicr180 "STAS 45WNiCr180") BDS Bulgaria · 2 - [4Ch18N9S2WG Indicative](/materials/bds/4ch18n9s2wg "BDS 4Ch18N9S2WG") - [4Х18Н9С2ВГ Indicative](/materials/bds/4kh18n9s2vg "BDS 4Х18Н9С2ВГ") 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 Ni Si Iron — the balance, never listed by a standard — 67.8 % Cr — 18 % Ni — 9 % Si — 2.5 % Traces & impurities · 2.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.4–0.5 | | Si | 2–3 — Unusual | | Mn | 0.8–1.5 | | P | 0.045 | | S | 0.03 | | Cr | 17–19 | | Ni | 8–10 | | W | 0.8–1.2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Nickel 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 | 0,40-0,50 | 0.400 | 0.500 | Range | | Si | 2,00-3,00 | 2.000 | 3.000 | Range | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 17,0-19,0 | 17.000 | 19.000 | Range | | Mn | 0,80-1,50 | 0.800 | 1.500 | Range | | Ni | 8,00-10,0 | 8.000 | 10.000 | Range | | W | 0,80-1,20 | 0.800 | 1.200 | 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: 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. ## 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=22a231ef-8541-411c-8369-45b9f9fb9258&designation=3fa60183-b56c-4630-ac88-fed022583047 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/une/f-3211.pdf "Datasheet as PDF")