--- title: "J94224 — Heat-resistant cast steels" description: "J94224 in UNS: material number 1.4848, also listed as GX40CrNiSi25-20. Category: Heat-resistant cast steels. Designations recorded for this grade: 20." canonical: https://steelequivalents.com/materials/uns/j94224 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/j94224.md cs: https://steelequivalents.com/cs/materiály/uns/j94224.md de: https://steelequivalents.com/de/werkstoffe/uns/j94224.md es: https://steelequivalents.com/es/materiales/uns/j94224.md fr: https://steelequivalents.com/fr/matériaux/uns/j94224.md hu: https://steelequivalents.com/hu/anyagok/uns/j94224.md it: https://steelequivalents.com/it/materiali/uns/j94224.md nl: https://steelequivalents.com/nl/materialen/uns/j94224.md pl: https://steelequivalents.com/pl/materiały/uns/j94224.md pt: https://steelequivalents.com/pt/materiais/uns/j94224.md ru: https://steelequivalents.com/ru/материалы/uns/j94224.md tr: https://steelequivalents.com/tr/malzemeler/uns/j94224.md zh: https://steelequivalents.com/zh/材料/uns/j94224.md ja: https://steelequivalents.com/ja/材料/uns/j94224.md ar: https://steelequivalents.com/ar/المواد/uns/j94224.md ko: https://steelequivalents.com/ko/재료/uns/j94224.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/j94224.md hi: https://steelequivalents.com/hi/सामग्री/uns/j94224.md content_hash: sha256:5b81b97fdc70cecce5892ce91593ce6a3331f1fd0b1c71cafd0293ac5bab52ca 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/materials/uns/j94224 > Canonical URL: https://steelequivalents.com/materials/uns/j94224 > 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. UNS · United States · 20 designations # J94224 J94224 is a designation in UNS for the material held under material number 1.4848, also listed as GX40CrNiSi25-20. It is a material in the category Heat-resistant cast steels. We list 20 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, JIS, GOST, UNI, ČSN and PN. - [*Material no.* **1.4848**](/materials/material-no/1.4848 "Material no.: 1.4848") - [*Category* **Heat-resistant cast steels · 82 grades**](/categories/heat-resistant-cast-steels "Category: Heat-resistant cast steels · 82 grades") - *Designations* **20** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=f45ba605-e071-465e-be1a-ccd7b3ea9397&designation=b6783310-45d4-4ead-a5d0-da636228d06c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/j94224.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN GX40CrNiSi25-20 This grade’s own name](/materials/din-en/gx40crnisi25-20 "DIN / EN GX40CrNiSi25-20") - [UNS J94203 This grade’s own name](/materials/uns/j94203 "UNS J94203") ## About Heat-resistant cast steels Heat-resistant cast steels are cast ferrous alloys formulated for service at elevated temperatures, where resistance to softening and thermal degradation is important. They are used for furnace components, heat-treatment equipment and other high-temperature plant parts that require cast shapes and dependable mechanical performance during heating. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 20 designations · 11 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 · 1 - [GX40CrNiSi25-20 This grade’s own name](/materials/din-en/gx40crnisi25-20 "DIN / EN GX40CrNiSi25-20") UNS United States · 3 - [J94203 This grade’s own name](/materials/uns/j94203 "UNS J94203") - [J94204 This grade’s own name](/materials/uns/j94204 "UNS J94204") - **J94224 This grade’s own name** AISI / SAE United States · 4 - [HK Indicative](/materials/aisi-sae/hk "AISI / SAE HK") - [J94203 Indicative](/materials/uns/j94203 "AISI / SAE J94203") - [J94204 Indicative](/materials/uns/j94204 "AISI / SAE J94204") - **J94224 Indicative** BS United Kingdom · 2 - [310 C 45 Indicative](/materials/bs/310-c-45 "BS 310 C 45") - [310C40 Indicative](/materials/bs/310c40 "BS 310C40") AFNOR France · 1 - [Z40CN25-20M Indicative](/materials/afnor/z40cn25-20m "AFNOR Z40CN25-20M") UNE Spain · 1 - [F.8452 Indicative](/materials/une/f-8452 "UNE F.8452") JIS Japan · 3 - [SCH 21 Indicative](/materials/jis/sch21 "JIS SCH 21") - [SCH 22X Indicative](/materials/jis/sch22x "JIS SCH 22X") - [SCH22 Indicative](/materials/jis/sch22 "JIS SCH22") GOST Russia / CIS · 2 - [20KH25N19S2L Indicative](/materials/gost/20kh25n19s2l "GOST 20KH25N19S2L") - [20Х25Н19С2Л Indicative](/materials/gost/20kh25n19s2l "GOST 20Х25Н19С2Л") UNI Italy · 1 - [GX40CrNi26-20 Indicative](/materials/uni/gx40crni26-20 "UNI GX40CrNi26-20") ČSN Czechia · 1 - [422 952 Indicative](/materials/csn/422-952 "ČSN 422 952") PN Poland · 1 - [LH25N19S2 Indicative](/materials/pn/lh25n19s2 "PN LH25N19S2") 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 — 49.3 % Cr — 25.5 % Ni — 20.5 % Mn — 2 % Traces & impurities · 2.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.3–0.5 | | Si | 1–2.5 | | Mn | ≤ 2 | | P | 0.04 | | S | 0.03 | | Cr | 24–27 | | Mo | ≤ 0.5 | | Ni | 19–22 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel 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 | 0,30-0,50 | 0.300 | 0.500 | Range | | Si | 1,00-2,50 | 1.000 | 2.500 | Range | | P | 0,04 | 0.040 | 0.040 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 24,0-27,0 | 24.000 | 27.000 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 19,0-22,0 | 19.000 | 22.000 | Range | | Mo | ≤0,50 | — | 0.500 | Max | 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 This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## Physical & mechanical properties Density 7,85 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. ## Properties by condition 1 conditions · 4 values By dimension**Quenching 1100°C** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | |---|---|---|---|---| | to 100 | 491 | 245 | 25 | 28 | Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## 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. [GX15CrNi25-20 1.4840 Cr 24,0-26,0 · Ni 19,0-21,0 - ΔCr 0.50 - ΔNi 0.50 - 2 designations](/materials/din-en/gx15crni25-20 "GX15CrNi25-20") ## 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=f45ba605-e071-465e-be1a-ccd7b3ea9397&designation=b6783310-45d4-4ead-a5d0-da636228d06c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/j94224.pdf "Datasheet as PDF")