--- title: "Heat resistant steels — 64 grades with composition — Page 2" description: "Heat resistant steels are alloyed materials designed to retain useful mechanical properties and resist oxidation or scaling during service at elevated…" canonical: https://steelequivalents.com/categories/heat-resistant-steels/page/2 language: en robots: index, follow og_type: website type: category-detail language_alternates: en: https://steelequivalents.com/categories/heat-resistant-steels/page/2.md cs: https://steelequivalents.com/cs/kategorie/žáruvzdorné-oceli.md de: https://steelequivalents.com/de/kategorien/hitzebeständige-stähle.md es: https://steelequivalents.com/es/categorías/aceros-refractarios.md fr: https://steelequivalents.com/fr/catégories/aciers-réfractaires.md hu: https://steelequivalents.com/hu/kategóriák/hőálló-acélok.md it: https://steelequivalents.com/it/categorie/acciai-refrattari.md nl: https://steelequivalents.com/nl/categorieën/hittebestendige-staalsoorten.md pl: https://steelequivalents.com/pl/kategorie/stale-żaroodporne.md pt: https://steelequivalents.com/pt/categorias/aços-resistentes-ao-calor.md ru: https://steelequivalents.com/ru/категории/жаростойкие-стали.md tr: https://steelequivalents.com/tr/kategoriler/isıya-dayanıklı-çelikler.md zh: https://steelequivalents.com/zh/类别/耐热钢.md ja: https://steelequivalents.com/ja/カテゴリー/耐熱鋼.md ar: https://steelequivalents.com/ar/الفئات/فولاذ-مقاوم-للحرارة.md ko: https://steelequivalents.com/ko/분류/내열강.md pt-br: https://steelequivalents.com/pt-br/categorias/aços-resistentes-ao-calor.md hi: https://steelequivalents.com/hi/श्रेणियाँ/ऊष्मा-प्रतिरोधी-इस्पात.md content_hash: sha256:b136e8ff70be30babfe204385b69c46ee23d98e704498ee73fd318d630d11868 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/heat-resistant-steels/page/2 > Canonical URL: https://steelequivalents.com/categories/heat-resistant-steels/page/2 > 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. ![Heat resistant steels](/images/uploads/847ddb17-d76f-4ab0-87cc-baae709d042b/high-temperature-steel-category-heat-tinted-surface-1920x1080.jpg) Category · 64 grades # Heat resistant steels Heat resistant steels are alloyed materials designed to retain useful mechanical properties and resist oxidation or scaling during service at elevated temperatures. They are used for components in furnaces, boilers, heat exchangers and power-generation equipment exposed to hot gases or sustained heat. | Grade | Material no. | C | Si | Cr | Mn | Ni | P | |---|---|---|---|---|---|---|---| | [1.4864](/materials/material-no/1.4864 "1.4864") | [1.4864](/materials/material-no/1.4864 "1.4864") | ≤0,15 | 1,00-2,00 | 15,0-17,0 | ≤2,00 | 33,0-37,0 | 0,045 | | [X10NiCrAlTi32-21](/materials/din-en/x10nicralti32-21 "X10NiCrAlTi32-21") | [1.4876](/materials/material-no/1.4876 "1.4876") | ≤0,12 | ≤1,00 | 19,0-23,0 | ≤2,00 | 30,0-34,0 | 0,03 | | [X6NiCrNbCe32-27](/materials/din-en/x6nicrnbce32-27 "X6NiCrNbCe32-27") | [1.4877](/materials/material-no/1.4877 "1.4877") | 0,04-0,08 | ≤0,30 | 26,0-28,0 | ≤1,00 | 31,0-33,0 | 0,02 | | [1.4878](/materials/material-no/1.4878 "1.4878") | [1.4878](/materials/material-no/1.4878 "1.4878") | ≤0,10 | ≤1,00 | 17,0-19,0 | ≤2,00 | 9,00-12,0 | 0,045 | | [X12CrNiMoNb20-15](/materials/din-en/x12crnimonb20-15 "X12CrNiMoNb20-15") | [1.4885](/materials/material-no/1.4885 "1.4885") | ≤0,15 | 1,50-2,50 | 19,0-22,0 | ≤2,00 | 14,0-16,0 | 0,045 | | [X 8 CrNiSiN 21 11](/materials/din-en/x-8-crnisin-21-11 "X 8 CrNiSiN 21 11") | [1.4893](/materials/material-no/1.4893 "1.4893") | ≤0,10 | 1,7 | 21 | — | 11 | — | | [X6CrNi23-13](/materials/din-en/x6crni23-13 "X6CrNi23-13") | [1.4950](/materials/material-no/1.4950 "1.4950") | 0,04-0,08 | ≤0,70 | 22,0-24,0 | ≤2,00 | 12,0-15,0 | 0,035 | | [X6CrNi25-20](/materials/din-en/x6crni25-20 "X6CrNi25-20") | [1.4951](/materials/material-no/1.4951 "1.4951") | 0,04-0,08 | ≤0,70 | 24,0-26,0 | ≤2,00 | 19,0-22,0 | 0,035 | | [8SiTi4](/materials/din-en/8siti4 "8SiTi4") | [1.5310](/materials/material-no/1.5310 "1.5310") | ≤0,10 | 0,70-1,10 | — | 0,70-1,00 | — | 0,035 | | [G-NiMo 17 Cr](/materials/din-en/g-nimo-17-cr "G-NiMo 17 Cr") | [2.4686](/materials/material-no/2.4686 "2.4686") | ≤0,03 | ≤0,50 | 15,5-17,5 | ≤1,00 | Rest/Bal. | — | | [NiCr23Fe](/materials/din-en/nicr23fe "NiCr23Fe") | [2.4851](/materials/material-no/2.4851 "2.4851") | 0,03-0,10 | ≤0,50 | 21,0-25,0 | ≤1,00 | 58,0-63,0 | 0,02 | | [NiCr22Mo9Nb](/materials/din-en/nicr22mo9nb "NiCr22Mo9Nb") | [2.4856](/materials/material-no/2.4856 "2.4856") | 0,03-0,10 | ≤0,50 | 20,0-23,0 | ≤0,50 | ≥58,0 | 0,02 | | [NiCr22Mo9Nb](/materials/din-en/nicr22mo9nb "NiCr22Mo9Nb") | [Ni 6625](/materials/material-no/ni-6625 "Ni 6625") | ≤0,10 | ≤0,50 | 20,0-23,0 | ≤0,50 | ≥58,0 | 0,02 | | [NiCr22Mo9Nb](/materials/din-en/nicr22mo9nb "NiCr22Mo9Nb") | [Ni 6625](/materials/material-no/ni-6625 "Ni 6625") | ≤0,10 | ≤0,80 | 20,0-23,0 | ≤2,00 | ≥55,0 | 0,02 | [Previous](/categories/heat-resistant-steels "Previous") Page 2 of 2 ## Standards covering this category 25 - [**DIN / EN***34 grades*](/materials/din-en "DIN / EN — 34 grades in this category") - [**JIS***26 grades*](/materials/jis "JIS — 26 grades in this category") - [**KS***24 grades*](/materials/ks "KS — 24 grades in this category") - [**UNS***23 grades*](/materials/uns "UNS — 23 grades in this category") - [**ASTM***19 grades*](/materials/astm "ASTM — 19 grades in this category") - [**AISI / SAE***18 grades*](/materials/aisi-sae "AISI / SAE — 18 grades in this category") - [**AFNOR***15 grades*](/materials/afnor "AFNOR — 15 grades in this category") - [**GOST***15 grades*](/materials/gost "GOST — 15 grades in this category") - [**GB***14 grades*](/materials/gb "GB — 14 grades in this category") - [**PN***14 grades*](/materials/pn "PN — 14 grades in this category") - [**BS***12 grades*](/materials/bs "BS — 12 grades in this category") - [**UNE***11 grades*](/materials/une "UNE — 11 grades in this category") - [**SAE AMS***11 grades*](/materials/ams "SAE AMS — 11 grades in this category") - [**ISO***10 grades*](/materials/iso "ISO — 10 grades in this category") - [**UNI***10 grades*](/materials/uni "UNI — 10 grades in this category") - [**ČSN***10 grades*](/materials/csn "ČSN — 10 grades in this category") - [**SS***8 grades*](/materials/ss "SS — 8 grades in this category") - [**STN***8 grades*](/materials/stn "STN — 8 grades in this category") - [**SRPS***7 grades*](/materials/srps "SRPS — 7 grades in this category") - [**STAS***7 grades*](/materials/stas "STAS — 7 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") - [**JUS***3 grades*](/materials/jus "JUS — 3 grades in this category") - [**ABNT NBR***1 grade*](/materials/abnt "ABNT NBR — 1 grade in this category") - [**AS / NZS***1 grade*](/materials/as-nzs "AS / NZS — 1 grade in this category") ## Property ranges 15 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | Rm | N/mm² | 360 | 930 | 40 | | Re | N/mm² | 175 | 735 | 39 | | A | % | 8 | 45 | 34 | | A5 | % | 15 | 40 | 9 | | Z | % | 15 | 60 | 25 | | aK | J/cm² | 10 | 20 | 4 | | HB | — | 162 | 341 | 47 | | HRB | — | 80 | 100 | 16 | | HV | — | 175 | 261 | 16 | | rho | g/cm³ | 7.39 | 8.4 | 34 | | E | GPa | 144 | 207 | 3 | | alpha | 10^-6/K | 10 | 19 | 5 | | lambda | W/(m·K) | 13.8 | 31 | 4 | | cp | J/(kg·K) | 538 | 538 | 2 | | rho\_el | nΩ·m | 946 | 1242 | 2 | Derived from 47 grades in this category with a recorded value. ## Composition range 19 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | B | % | 0.001 | 0.01 | 4 | | C | % | 0.03 | 0.85 | 62 | | N | % | 0.05 | 0.5 | 22 | | Al | % | 0.025 | 4 | 13 | | Si | % | 0.3 | 3.5 | 62 | | P | % | 0.02 | 0.25 | 60 | | S | % | 0.01 | 0.09 | 60 | | Ti | % | 0.15 | 2.35 | 8 | | V | % | 0.1 | 0.5 | 5 | | Cr | % | 1.5 | 31.2 | 61 | | Mn | % | 0.2 | 10 | 61 | | Fe | % | 5 | 45.64 | 6 | | Co | % | 1 | 21 | 5 | | Ni | % | 0.5 | 68.5 | 51 | | Cu | % | 0.3 | 0.5 | 8 | | Nb | % | 0.2 | 4.2 | 9 | | Mo | % | 0.3 | 18 | 15 | | Ce | % | 0.03 | 0.1 | 3 | | W | % | 0.75 | 3 | 6 | Derived from 62 grades in this category with a recorded value. ## Related guides 5 - [**Heat Treatment Fundamentals for Steel**](/wiki/heat-treatment/heat-treatment-fundamentals "Heat Treatment Fundamentals for Steel") - [**Steel Heat Treatment Process Selection: A Standards-Based Guide**](/wiki/heat-treatment/steel-heat-treatment-process-selection "Steel Heat Treatment Process Selection: A Standards-Based Guide") - [**Steel Microstructures After Heat Treatment**](/wiki/steel-families/steel-microstructures-after-heat-treatment "Steel Microstructures After Heat Treatment") - [**Steel Heat Treatment Atmospheres and Surface Protection**](/wiki/heat-treatment/steel-heat-treatment-atmospheres-and-surface-protection "Steel Heat Treatment Atmospheres and Surface Protection") - [**Heat Treatment Distortion and Residual Stress in Steel**](/wiki/heat-treatment/heat-treatment-distortion-and-residual-stress-in-steel "Heat Treatment Distortion and Residual Stress in Steel")