--- title: "Valve steels — 14 grades with composition" description: "Valve steels are alloy steels developed for valve components exposed to heat, pressure, wear, and corrosive service conditions. They are characterised…" canonical: https://steelequivalents.com/categories/valve-steels language: en robots: index, follow og_type: website type: category-detail language_alternates: en: https://steelequivalents.com/categories/valve-steels.md cs: https://steelequivalents.com/cs/kategorie/ventilové-oceli.md de: https://steelequivalents.com/de/kategorien/ventilstähle.md es: https://steelequivalents.com/es/categorías/aceros-para-válvulas.md fr: https://steelequivalents.com/fr/catégories/aciers-pour-soupapes.md hu: https://steelequivalents.com/hu/kategóriák/szelepacélok.md it: https://steelequivalents.com/it/categorie/acciai-per-valvole.md nl: https://steelequivalents.com/nl/categorieën/klepstalen.md pl: https://steelequivalents.com/pl/kategorie/stale-zaworowe.md pt: https://steelequivalents.com/pt/categorias/aços-para-válvulas.md ru: https://steelequivalents.com/ru/категории/клапанные-стали.md tr: https://steelequivalents.com/tr/kategoriler/valf-çelikleri.md zh: https://steelequivalents.com/zh/类别/阀门钢.md ja: https://steelequivalents.com/ja/カテゴリー/バルブ鋼.md ar: https://steelequivalents.com/ar/الفئات/فولاذ-الصمامات.md ko: https://steelequivalents.com/ko/분류/밸브강.md pt-br: https://steelequivalents.com/pt-br/categorias/aços-para-válvulas.md hi: https://steelequivalents.com/hi/श्रेणियाँ/वाल्व-इस्पात.md content_hash: sha256:6cb1b729442b788d0237b26e2159db2941b2a777e14b777ebf4687f1ed1cedad 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/categories/valve-steels > Canonical URL: https://steelequivalents.com/categories/valve-steels > 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. ![Valve steels](/images/uploads/09546148-523d-49c4-94be-d4e08af1591e/valve-steels-category-engine-valves-1920x1080.jpg) Category · 14 grades # 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. | Grade | Material no. | C | Si | P | S | Cr | Mn | |---|---|---|---|---|---|---|---| | [45SiCr16-11](/materials/din-en/45sicr16-11 "45SiCr16-11") | [1.4704](/materials/material-no/1.4704 "1.4704") | 0,40-0,50 | 3,50-4,50 | 0,045 | 0,03 | 2,50-3,00 | ≤1,00 | | [1.4718](/materials/material-no/1.4718 "1.4718") | [1.4718](/materials/material-no/1.4718 "1.4718") | 0,40-0,50 | 2,70-3,30 | 0,04 | 0,03 | 8,00-10,0 | ≤0,60 | | [X40CrSiMo10-2](/materials/din-en/x40crsimo10-2 "X40CrSiMo10-2") | [1.4731](/materials/material-no/1.4731 "1.4731") | 0,35-0,45 | 2,00-3,00 | 0,04 | 0,03 | 9,50-11,5 | ≤0,80 | | [X80CrSiMoW15-2](/materials/din-en/x80crsimow15-2 "X80CrSiMoW15-2") | [1.4732](/materials/material-no/1.4732 "1.4732") | 0,75-0,85 | 1,80-2,20 | 0,04 | 0,03 | 14,0-16,0 | ≤0,80 | | [X85CrMoV18-2](/materials/din-en/x85crmov18-2 "X85CrMoV18-2") | [1.4748](/materials/material-no/1.4748 "1.4748") | 0,80-0,90 | ≤1,00 | 0,04 | 0,03 | 16,5-18,5 | ≤1,50 | | [X60CrMnMoVNbN21-10](/materials/din-en/x60crmnmovnbn21-10 "X60CrMnMoVNbN21-10") | [1.4785](/materials/material-no/1.4785 "1.4785") | 0,57-0,65 | ≤0,25 | 0,05 | 0,025 | 20,0-22,0 | 9,50-11,5 | | [X33CrNiMnN23-8](/materials/din-en/x33crnimnn23-8 "X33CrNiMnN23-8") | [1.4866](/materials/material-no/1.4866 "1.4866") | 0,28-0,38 | 0,50-1,00 | 0,045 | 0,03 | 22,0-24,0 | 1,50-3,50 | | [X53CrMnNiNbN21-9](/materials/din-en/x53crmnninbn21-9 "X53CrMnNiNbN21-9") | [1.4870](/materials/material-no/1.4870 "1.4870") | 0,48-0,58 | ≤0,45 | 0,045 | 0,03 | 20,0-22,0 | 8,00-10,0 | | [1.4871](/materials/material-no/1.4871 "1.4871") | [1.4871](/materials/material-no/1.4871 "1.4871") | 0,48-0,58 | ≤0,25 | 0,045 | 0,03 | 20,0-22,0 | 8,00-10,0 | | [X45CrNiW18-9](/materials/din-en/x45crniw18-9 "X45CrNiW18-9") | [1.4873](/materials/material-no/1.4873 "1.4873") | 0,40-0,50 | 2,00-3,00 | 0,045 | 0,03 | 17,0-19,0 | 0,80-1,50 | | [X55CrMnNiN20-8](/materials/din-en/x55crmnnin20-8 "X55CrMnNiN20-8") | [1.4875](/materials/material-no/1.4875 "1.4875") | 0,50-0,60 | ≤0,25 | 0,045 | 0,03 | 19,5-21,5 | 7,00-10,0 | | [X70CrMnNiN21-6](/materials/din-en/x70crmnnin21-6 "X70CrMnNiN21-6") | [1.4881](/materials/material-no/1.4881 "1.4881") | 0,65-0,75 | ≤0,80 | 0,05 | 0,02-0,06 | 20,0-22,0 | 5,50-7,00 | | [X50CrMnNiNbN21-9](/materials/din-en/x50crmnninbn21-9 "X50CrMnNiNbN21-9") | [1.4882](/materials/material-no/1.4882 "1.4882") | 0,45-0,55 | ≤0,45 | 0,045 | 0,03 | 20,0-22,0 | 8,00-10,0 | | [NiFe25Cr20NbTi](/materials/din-en/nife25cr20nbti "NiFe25Cr20NbTi") | [2.4955](/materials/material-no/2.4955 "2.4955") | 0,04-0,10 | ≤1,00 | 0,03 | 0,015 | 18,0-21,0 | ≤1,00 | ## Standards covering this category 18 - [**DIN / EN***14 grades*](/materials/din-en "DIN / EN — 14 grades in this category") - [**UNE***6 grades*](/materials/une "UNE — 6 grades in this category") - [**UNS***5 grades*](/materials/uns "UNS — 5 grades in this category") - [**AISI / SAE***5 grades*](/materials/aisi-sae "AISI / SAE — 5 grades in this category") - [**BS***5 grades*](/materials/bs "BS — 5 grades in this category") - [**AFNOR***5 grades*](/materials/afnor "AFNOR — 5 grades in this category") - [**JIS***4 grades*](/materials/jis "JIS — 4 grades in this category") - [**GOST***4 grades*](/materials/gost "GOST — 4 grades in this category") - [**PN***4 grades*](/materials/pn "PN — 4 grades in this category") - [**MSZ***4 grades*](/materials/msz "MSZ — 4 grades in this category") - [**BDS***4 grades*](/materials/bds "BDS — 4 grades in this category") - [**GB***3 grades*](/materials/gb "GB — 3 grades in this category") - [**UNI***3 grades*](/materials/uni "UNI — 3 grades in this category") - [**ČSN***3 grades*](/materials/csn "ČSN — 3 grades in this category") - [**STAS***3 grades*](/materials/stas "STAS — 3 grades in this category") - [**KS***3 grades*](/materials/ks "KS — 3 grades in this category") - [**ISO***2 grades*](/materials/iso "ISO — 2 grades in this category") - [**SRPS***2 grades*](/materials/srps "SRPS — 2 grades in this category") ## Property ranges 19 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | Rm | N/mm² | 740 | 930 | 3 | | Re | N/mm² | 440 | 735 | 3 | | A | % | 8 | 15 | 3 | | A5 | % | 10 | 15 | 2 | | Z | % | 35 | 40 | 2 | | aK | J/cm² | 20 | 20 | 1 | | KCU | kJ/m² | 200 | 200 | 1 | | HB | — | 197 | 355 | 4 | | HRC | — | 25 | 30 | 6 | | rho | g/cm³ | 7.43 | 7.85 | 14 | | E | GPa | 129 | 214 | 1 | | alpha | 10^-6/K | 10 | 14.3 | 2 | | lambda | W/(m·K) | 17 | 26 | 2 | | cp | J/(kg·K) | 532 | 586 | 1 | | rho\_el | nΩ·m | 906 | 1216 | 1 | | Ac1 | °C | 810 | 900 | 2 | | Ac3 | °C | 950 | 970 | 2 | | Ar3 | °C | 845 | 970 | 2 | | Ar1 | °C | 700 | 810 | 2 | Derived from 14 grades in this category with a recorded value. ## Composition range 16 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | B | % | 0.008 | 0.008 | 1 | | C | % | 0.04 | 0.9 | 14 | | N | % | 0.18 | 0.6 | 7 | | Al | % | 0.3 | 1 | 1 | | Si | % | 0.25 | 4.5 | 14 | | P | % | 0.03 | 0.05 | 14 | | S | % | 0.015 | 0.06 | 14 | | Ti | % | 1 | 2 | 1 | | V | % | 0.3 | 1 | 2 | | Cr | % | 2.5 | 24 | 14 | | Mn | % | 0.6 | 11.5 | 14 | | Fe | % | 23 | 28 | 1 | | Ni | % | 0.5 | 56.615 | 12 | | Nb | % | 1 | 3 | 4 | | Mo | % | 0.5 | 2.5 | 5 | | W | % | 0.5 | 1.5 | 4 | Derived from 14 grades in this category with a recorded value.