--- title: "Resistance heating alloys — 9 grades with composition" description: "Resistance heating alloys are metallic alloys designed to generate heat when an electric current passes through them. They combine electrical…" canonical: https://steelequivalents.com/categories/resistance-heating-alloys language: en robots: index, follow og_type: website type: category-detail language_alternates: en: https://steelequivalents.com/categories/resistance-heating-alloys.md cs: https://steelequivalents.com/cs/kategorie/slitiny-pro-odporové-topné-vodiče.md de: https://steelequivalents.com/de/kategorien/heizleiterlegierungen.md es: https://steelequivalents.com/es/categorías/aleaciones-para-resistencias-calefactoras.md fr: https://steelequivalents.com/fr/catégories/alliages-pour-résistances-chauffantes.md hu: https://steelequivalents.com/hu/kategóriák/ellenállásfűtő-ötvözetek.md it: https://steelequivalents.com/it/categorie/leghe-per-resistenze-elettriche.md nl: https://steelequivalents.com/nl/categorieën/weerstandsverwarmingslegeringen.md pl: https://steelequivalents.com/pl/kategorie/stopy-oporowe-na-elementy-grzejne.md pt: https://steelequivalents.com/pt/categorias/ligas-para-resistências-de-aquecimento.md ru: https://steelequivalents.com/ru/категории/сплавы-для-нагревательных-элементов.md tr: https://steelequivalents.com/tr/kategoriler/isıtma-elemanı-alaşımları.md zh: https://steelequivalents.com/zh/类别/电热合金.md ja: https://steelequivalents.com/ja/カテゴリー/電熱合金.md ar: https://steelequivalents.com/ar/الفئات/سبائك-مقاومة-التسخين.md ko: https://steelequivalents.com/ko/분류/전열-합금.md pt-br: https://steelequivalents.com/pt-br/categorias/ligas-para-elementos-de-aquecimento.md hi: https://steelequivalents.com/hi/श्रेणियाँ/तापन-तत्व-मिश्रधातुएँ.md content_hash: sha256:c3af63395cff631f4b444832712b0fe66b30fcef7b76b42691183e969380f85a 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/resistance-heating-alloys > Canonical URL: https://steelequivalents.com/categories/resistance-heating-alloys > 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. ![Resistance heating alloys](/images/uploads/dc8608fc-20f7-498f-949a-5bbd0cd57d25/resistance-heating-alloys-category-heating-element-coils-1920x1080.jpg) Category · 9 grades # Resistance heating alloys Resistance heating alloys are metallic alloys designed to generate heat when an electric current passes through them. They combine electrical resistance with stability during prolonged heating, making them suitable for heating elements in furnaces, ovens and industrial equipment. | Grade | Material no. | C | Si | S | Cr | Mn | P | |---|---|---|---|---|---|---|---| | [CrAl 14 4](/materials/din-en/cral-14-4 "CrAl 14 4") | [1.4725](/materials/material-no/1.4725 "1.4725") | ≤0,10 | ≤0,50 | 0,03 | 13,0-15,0 | ≤1,00 | 0,045 | | [CrAl 25 5](/materials/din-en/cral-25-5 "CrAl 25 5") | [1.4765](/materials/material-no/1.4765 "1.4765") | ≤0,10 | ≤1,00 | 0,03 | 22,0-25,0 | ≤0,60 | 0,045 | | [CrAl 20 5](/materials/din-en/cral-20-5 "CrAl 20 5") | [1.4767](/materials/material-no/1.4767 "1.4767") | ≤0,10 | ≤1,00 | 0,03 | 19,0-22,0 | ≤1,00 | 0,045 | | [CrNi 25 20](/materials/din-en/crni-25-20 "CrNi 25 20") | [1.4843](/materials/material-no/1.4843 "1.4843") | ≤0,20 | 1,50-2,50 | 0,03 | 22,0-25,0 | ≤2,00 | 0,045 | | [NiCr 30 20](/materials/din-en/nicr-30-20 "NiCr 30 20") | [1.4860](/materials/material-no/1.4860 "1.4860") | ≤0,20 | 2,00-3,00 | 0,03 | 20,0-22,0 | ≤1,50 | 0,045 | | [NiCr 70 30](/materials/din-en/nicr7030 "NiCr 70 30") | [2.4658](/materials/material-no/2.4658 "2.4658") | ≤0,10 | 0,50-2,00 | 0,015 | 29,0-32,0 | ≤1,00 | 0,02 | | [SG-NiCr19NbMoTi](/materials/din-en/sg-nicr19nbmoti "SG-NiCr19NbMoTi") | [2.4667](/materials/material-no/2.4667 "2.4667") | ≤0,08 | ≤0,40 | 0,015 | 17,0-21,0 | ≤0,40 | — | | [NiCr 80 20](/materials/din-en/nicr80-20 "NiCr 80 20") | [2.4869](/materials/material-no/2.4869 "2.4869") | ≤0,15 | 0,50-2,00 | 0,015 | 19,0-21,0 | ≤1,00 | 0,02 | | [NiCr19Fe19Nb5Mo3](/materials/din-en/nicr19fe19nb5mo3 "NiCr19Fe19Nb5Mo3") | [Ni 7718](/materials/material-no/ni-7718 "Ni 7718") | ≤0,08 | ≤0,30 | 0,015 | 17,0-21,0 | ≤0,30 | 0,015 | ## Standards covering this category 13 - [**DIN / EN***9 grades*](/materials/din-en "DIN / EN — 9 grades in this category") - [**UNS***6 grades*](/materials/uns "UNS — 6 grades in this category") - [**ASTM***2 grades*](/materials/astm "ASTM — 2 grades in this category") - [**SAE AMS***2 grades*](/materials/ams "SAE AMS — 2 grades in this category") - [**AISI / SAE***1 grade*](/materials/aisi-sae "AISI / SAE — 1 grade in this category") - [**BS***1 grade*](/materials/bs "BS — 1 grade in this category") - [**AFNOR***1 grade*](/materials/afnor "AFNOR — 1 grade in this category") - [**JIS***1 grade*](/materials/jis "JIS — 1 grade in this category") - [**GB***1 grade*](/materials/gb "GB — 1 grade in this category") - [**GOST***1 grade*](/materials/gost "GOST — 1 grade in this category") - [**SS***1 grade*](/materials/ss "SS — 1 grade in this category") - [**ČSN***1 grade*](/materials/csn "ČSN — 1 grade in this category") - [**PN***1 grade*](/materials/pn "PN — 1 grade in this category") ## Property ranges 8 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | Rm | N/mm² | 590 | 590 | 1 | | Re | N/mm² | 205 | 205 | 1 | | A | % | 40 | 40 | 1 | | Z | % | 50 | 50 | 1 | | HB | — | 201 | 201 | 1 | | HRB | — | 95 | 95 | 1 | | HV | — | 210 | 210 | 1 | | rho | g/cm³ | 7.85 | 7.85 | 9 | Derived from 9 grades in this category with a recorded value. ## Composition range 15 | Property | Unit | Min | Max | Grades | |---|---|---|---|---| | B | % | 0.006 | 0.006 | 2 | | C | % | 0.08 | 0.2 | 9 | | Al | % | 0.2 | 6 | 7 | | Si | % | 0.3 | 3 | 9 | | P | % | 0.015 | 0.045 | 8 | | S | % | 0.015 | 0.03 | 9 | | Ti | % | 0.6 | 1.2 | 2 | | Cr | % | 13 | 32 | 9 | | Mn | % | 0.3 | 2 | 9 | | Fe | % | 1 | 24 | 4 | | Co | % | 1.5 | 1.5 | 2 | | Ni | % | 19 | 75 | 6 | | Cu | % | 0.3 | 0.5 | 4 | | Nb | % | 4.8 | 5.5 | 2 | | Mo | % | 2.8 | 3.3 | 2 | Derived from 9 grades in this category with a recorded value. ## Related guides 1 - [**Pitting Resistance Equivalent Number Calculations**](/wiki/calculated-values/pitting-resistance-equivalent-number-calculations "Pitting Resistance Equivalent Number Calculations")