--- title: "High-temperature steels / aviation variant — 12 grades" description: "High-temperature aviation steels are heat-resistant materials designed to retain strength and structural stability during prolonged exposure to elevated…" canonical: https://steelequivalents.com/categories/high-temperature-steels-aviation-variant language: en robots: index, follow og_type: website type: category-detail language_alternates: en: https://steelequivalents.com/categories/high-temperature-steels-aviation-variant.md cs: https://steelequivalents.com/cs/kategorie/žárupevné-oceli-letecká-varianta.md de: https://steelequivalents.com/de/kategorien/hochwarmfeste-stähle-luftfahrtvariante.md es: https://steelequivalents.com/es/categorías/aceros-resistentes-a-la-fluencia-variante-aeroespacial.md fr: https://steelequivalents.com/fr/catégories/aciers-résistants-au-fluage-variante-aéronautique.md hu: https://steelequivalents.com/hu/kategóriák/melegszilárd-acélok-repülőgépipari-változat.md it: https://steelequivalents.com/it/categorie/acciai-resistenti-alle-alte-temperature-settore-aeronautico.md nl: https://steelequivalents.com/nl/categorieën/warmvaste-staalsoorten-luchtvaartvariant.md pl: https://steelequivalents.com/pl/kategorie/stale-żarowytrzymałe-wariant-lotniczy.md pt: https://steelequivalents.com/pt/categorias/aços-para-altas-temperaturas-variante-aeronáutica.md ru: https://steelequivalents.com/ru/категории/жаропрочные-стали-авиационный-вариант.md tr: https://steelequivalents.com/tr/kategoriler/sürünmeye-dayanıklı-yüksek-sıcaklık-çelikleri-havacılık-tipi.md zh: https://steelequivalents.com/zh/类别/高温钢-航空用.md ja: https://steelequivalents.com/ja/カテゴリー/航空用高温強度鋼.md ar: https://steelequivalents.com/ar/الفئات/فولاذ-للعمل-في-درجات-الحرارة-العالية-نوع-الطيران.md ko: https://steelequivalents.com/ko/분류/고온용강-항공용.md pt-br: https://steelequivalents.com/pt-br/categorias/aços-para-altas-temperaturas-variante-aeronáutica.md hi: https://steelequivalents.com/hi/श्रेणियाँ/उच्च-तापमान-इस्पात-विमानन-संस्करण.md content_hash: sha256:b60402d0fe5a3830bb2e30c73d199df1544a492f048c407cab244fae798822c2 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/categories/high-temperature-steels-aviation-variant > Canonical URL: https://steelequivalents.com/categories/high-temperature-steels-aviation-variant > 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. ![High-temperature steels / aviation variant](/images/uploads/15e9e173-9595-4404-a579-94d95e0ecc71/high-temperature-steels-aviation-variant-category-turbine-disc-1920x1080.jpg) Category · 12 grades # High-temperature steels / aviation variant High-temperature aviation steels are heat-resistant materials designed to retain strength and structural stability during prolonged exposure to elevated temperatures. Their alloying provides resistance to creep, oxidation, and thermal degradation, making them suitable for aircraft engine and other hot-section components. | Grade | Material no. | C | Si | P | S | Cr | Mn | |---|---|---|---|---|---|---|---| | [X8CrCoNiMo10-6](/materials/din-en/x8crconimo10-6 "X8CrCoNiMo10-6") | [1.4911](/materials/material-no/1.4911 "1.4911") | 0,05-0,12 | 0,10-0,80 | 0,025 | 0,015 | 9,80-11,2 | 0,30-1,30 | | 1.4914 | [1.4914](/materials/material-no/1.4914 "1.4914") | 0,11-0,19 | 0,15-0,65 | 0,03 | 0,025 | 10,0-12,0 | 0,20-1,25 | | 1.4934 | [1.4934](/materials/material-no/1.4934 "1.4934") | 0,18-0,26 | 0,15-0,40 | 0,035 | 0,035 | 10,5-12,5 | 0,40-0,70 | | [X12CrNiMo12](/materials/din-en/x12crnimo12 "X12CrNiMo12") | [1.4939](/materials/material-no/1.4939 "1.4939") | 0,08-0,13 | ≤0,35 | 0,025 | 0,02 | 11,0-12,5 | 0,50-0,90 | | [X6NiCrTiMoV26-15](/materials/din-en/x6nicrtimov26-15 "X6NiCrTiMoV26-15") | [1.4944](/materials/material-no/1.4944 "1.4944") | ≤0,08 | ≤1,00 | 0,025 | 0,015 | 13,5-16,0 | ≤2,00 | | [R30155](/materials/uns/r30155 "R30155") | [1.4974](/materials/material-no/1.4974 "1.4974") | 0,08-0,16 | ≤1,00 | 0,04 | 0,03 | 20,0-22,5 | 1,00-2,00 | | [S31600](/materials/uns/s31600 "S31600") | [1.4984](/materials/material-no/1.4984 "1.4984") | 0,04-0,10 | 0,30-0,60 | 0,045 | 0,03 | 15,5-17,5 | ≤1,50 | | [NiCr20Ti](/materials/din-en/nicr20ti "NiCr20Ti") | [2.4630](/materials/material-no/2.4630 "2.4630") | 0,08-0,15 | ≤1,00 | 0,03 | 0,02 | 18,0-21,0 | ≤1,00 | | [NiCr20TiAl](/materials/din-en/nicr20tial "NiCr20TiAl") | [2.4631](/materials/material-no/2.4631 "2.4631") | 0,04-0,10 | ≤1,00 | 0,03 | 0,015 | 18,0-21,0 | ≤1,00 | | [NiCr20Co18Ti](/materials/din-en/nicr20co18ti "NiCr20Co18Ti") | [2.4632](/materials/material-no/2.4632 "2.4632") | ≤0,13 | ≤1,00 | 0,02 | 0,015 | 18,0-21,0 | ≤1,00 | | [NiCo20Cr15MoAlTi](/materials/din-en/nico20cr15moalti "NiCo20Cr15MoAlTi") | [2.4634](/materials/material-no/2.4634 "2.4634") | 0,12-0,17 | ≤1,00 | 0,045 | 0,015 | 14,0-15,7 | ≤1,00 | | [CoCr20W15Ni](/materials/din-en/cocr20w15ni "CoCr20W15Ni") | [2.4964](/materials/material-no/2.4964 "2.4964") | 0,05-0,15 | ≤0,40 | 0,02 | 0,015 | 19,0-21,0 | ≤2,00 | ## Standards covering this category 11 - [**UNS***9 grades*](/materials/uns "UNS — 9 grades in this category") - [**DIN / EN***8 grades*](/materials/din-en "DIN / EN — 8 grades in this category") - [**ASTM***5 grades*](/materials/astm "ASTM — 5 grades in this category") - [**SAE AMS***5 grades*](/materials/ams "SAE AMS — 5 grades in this category") - [**AISI / SAE***4 grades*](/materials/aisi-sae "AISI / SAE — 4 grades in this category") - [**BS***4 grades*](/materials/bs "BS — 4 grades in this category") - [**AFNOR***3 grades*](/materials/afnor "AFNOR — 3 grades in this category") - [**SS***2 grades*](/materials/ss "SS — 2 grades in this category") - [**ISO***1 grade*](/materials/iso "ISO — 1 grade in this category") - [**GB***1 grade*](/materials/gb "GB — 1 grade in this category") - [**ABNT NBR***1 grade*](/materials/abnt "ABNT NBR — 1 grade in this category") ## Property ranges 3 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | HB | — | 230 | 230 | 1 | | HRC | — | 32 | 32 | 1 | | rho | g/cm³ | 7.85 | 9.1 | 12 | Derived from 12 grades in this category with a recorded value. ## Composition range 20 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | B | % | 0.003 | 0.02 | 5 | | C | % | 0.04 | 0.26 | 12 | | N | % | 0.02 | 0.2 | 4 | | Al | % | 0.35 | 4.9 | 4 | | Si | % | 0.1 | 1 | 12 | | P | % | 0.02 | 0.045 | 12 | | S | % | 0.015 | 0.035 | 12 | | Ti | % | 0.2 | 3 | 5 | | V | % | 0.1 | 0.7 | 5 | | Cr | % | 9.8 | 22.5 | 12 | | Mn | % | 0.2 | 2 | 12 | | Fe | % | 1 | 5 | 5 | | Co | % | 2 | 57.915 | 7 | | Ni | % | 0.2 | 81.67 | 12 | | Cu | % | 0.2 | 0.5 | 4 | | Zr | % | 0.15 | 0.15 | 2 | | Nb | % | 0.1 | 1.25 | 3 | | Mo | % | 0.4 | 5.5 | 8 | | W | % | 0.4 | 16 | 4 | | Pb | % | 0.005 | 0.005 | 1 | Derived from 12 grades in this category with a recorded value. ## Related guides 3 - [**Steel Creep, Stress Rupture, and Long-Term High-Temperature Performance**](/wiki/reading-a-datasheet/steel-creep-stress-rupture-and-long-term-high-temperature-performance "Steel Creep, Stress Rupture, and Long-Term High-Temperature Performance") - [**High-Strength Low-Alloy Steels: Grades, Microalloying, Processing, and Properties**](/wiki/steel-families/high-strength-low-alloy-steels "High-Strength Low-Alloy Steels: Grades, Microalloying, Processing, and Properties") - [**Steel Thermal Expansion and Temperature-Dependent Properties**](/wiki/calculated-values/steel-thermal-expansion-and-temperature-dependent-properties "Steel Thermal Expansion and Temperature-Dependent Properties")