--- title: "1.4948 — High-temperature steels" description: "1.4948 is the material number of the grade also listed as X6CrNi18-10. Category: High-temperature steels. Designations recorded for this grade: 17." canonical: https://steelequivalents.com/materials/material-no/1.4948 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.4948.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.4948.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.4948.md es: https://steelequivalents.com/es/materiales/número-de-material/1.4948.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.4948.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.4948.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.4948.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.4948.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.4948.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.4948.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.4948.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.4948.md zh: https://steelequivalents.com/zh/材料/材料编号/1.4948.md ja: https://steelequivalents.com/ja/材料/材料番号/1.4948.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.4948.md ko: https://steelequivalents.com/ko/재료/재료번호/1.4948.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.4948.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.4948.md content_hash: sha256:59ef58f0fd501f90145c6442b4dd3b14df4c314aea8b801eb7699920bce09fb2 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/materials/material-no/1.4948 > Canonical URL: https://steelequivalents.com/materials/material-no/1.4948 > 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. Material number · Europe · 17 designations # 1.4948 1.4948 is the material number of the grade also listed as X6CrNi18-10. It is a material in the category High-temperature steels. We list 17 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, ISO, JIS and GOST. - ***Material no.* **1.4948**** - [*Category* **High-temperature steels · 40 grades**](/categories/high-temperature-steels "Category: High-temperature steels · 40 grades") - *Designations* **17** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=32dba319-d98c-494c-b080-46f90f8be359 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4948.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN X6CrNi18-10 This grade’s own name](/materials/din-en/x6crni18-10 "DIN / EN X6CrNi18-10") - [UNS S30409 This grade’s own name](/materials/uns/s30409 "UNS S30409") - [AISI / SAE 304H This grade’s own name · 3 grades on that route](/materials/aisi-sae/304h "AISI / SAE 304H") ## About High-temperature steels High-temperature steels are steels designed to retain useful strength and structural stability during exposure to elevated temperatures. Their alloying systems provide resistance to oxidation, creep and loss of mechanical properties during prolonged heating, making them suitable for furnace components, heat exchangers, boilers and other hot-service equipment. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 17 designations · 9 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 · 3 - [X6CrNi18-10 This grade’s own name](/materials/din-en/x6crni18-10 "DIN / EN X6CrNi18-10") - [X6CrNi18-11 This grade’s own name Withdrawn](/materials/din-en/x6crni18-11 "DIN / EN X6CrNi18-11") - [X7CrNi18-9 This grade’s own name](/materials/din-en/x7crni18-9 "DIN / EN X7CrNi18-9") UNS United States · 2 - [S30409 This grade’s own name](/materials/uns/s30409 "UNS S30409") - [S30480 This grade’s own name](/materials/uns/s30480 "UNS S30480") AISI / SAE United States · 3 - [304H This grade’s own name](/materials/aisi-sae/304h "AISI / SAE 304H") - [S30409 Indicative](/materials/uns/s30409 "AISI / SAE S30409") - [S30480 Indicative](/materials/uns/s30480 "AISI / SAE S30480") ASTM United States · 1 - [TP304H Indicative](/materials/astm/tp304h "ASTM TP304H") BS United Kingdom · 3 - [304 S 50 Indicative](/materials/bs/304-s-50 "BS 304 S 50") - [304 S 51 Indicative](/materials/bs/304-s-51 "BS 304 S 51") - [801 grade A Indicative](/materials/bs/801-grade-a "BS 801 grade A") AFNOR France · 1 - [Z6CN18-09 Indicative](/materials/afnor/z6cn18-09 "AFNOR Z6CN18-09") ISO International · 1 - [X7CrNi18-9 Indicative](/materials/din-en/x7crni18-9 "ISO X7CrNi18-9") JIS Japan · 2 - [SUS 302 Indicative](/materials/jis/sus302 "JIS SUS 302") - [SUS304H Indicative](/materials/jis/sus304h "JIS SUS304H") GOST Russia / CIS · 1 - [08KH18N10 Indicative](/materials/gost/08kh18n10 "GOST 08KH18N10") 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 Mn Iron — the balance, never listed by a standard — 69.3 % Cr — 18 % Ni — 9.5 % Mn — 2 % Traces & impurities · 1.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.04–0.08 | | Si | ≤ 1 | | Mn | ≤ 2 | | P | 0.035 | | S | 0.015 | | Cr | 17–19 | | Ni | 8–11 | | N | 0.11 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Nickel Nitrogen 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 | 0,04-0,08 | 0.040 | 0.080 | Range | | N | 0,11 | 0.110 | 0.110 | Exact | | Si | ≤1,00 | — | 1.000 | Max | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,015 | 0.015 | 0.015 | Exact | | Cr | 17,0-19,0 | 17.000 | 19.000 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 8,00-11,0 | 8.000 | 11.000 | 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 7,9 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. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.4, a shared category, and a published range for Cr / Ni that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade. [X6CrNiTiB18-10 1.4941 Cr 17,0-19,0 · Ni 9,00-12,0 - ΔCr 0.00 - ΔNi 1.00 - 5 designations](/materials/din-en/x6crnitib18-10 "X6CrNiTiB18-10")[X3CrNiN18-11 1.4949 Cr 17,0-19,0 · Ni 9,50-11,5 - ΔCr 0.00 - ΔNi 1.00 - 2 designations](/materials/din-en/x3crnin18-11 "X3CrNiN18-11")[X7CrNiTi18-10 1.4940 Cr 17,0-19,0 · Ni 9,00-13,0 - ΔCr 0.00 - ΔNi 1.50 - 3 designations](/materials/din-en/x7crniti18-10 "X7CrNiTi18-10")[X2CrNiMoN17-12-2 1.4909 Cr 17,0-18,0 · Ni 11,0-13,0 - ΔCr 0.50 - ΔNi 2.50 - 5 designations](/materials/din-en/x2crnimon17-12-2 "X2CrNiMoN17-12-2") ## 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=32dba319-d98c-494c-b080-46f90f8be359 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4948.pdf "Datasheet as PDF")