--- title: "J92603 — Heat-resistant cast steels" description: "J92603 in UNS: material number 1.4825, also listed as GX25CrNiSi18-9. Category: Heat-resistant cast steels. Designations recorded for this grade: 13." canonical: https://steelequivalents.com/materials/uns/j92603 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/j92603.md cs: https://steelequivalents.com/cs/materiály/uns/j92603.md de: https://steelequivalents.com/de/werkstoffe/uns/j92603.md es: https://steelequivalents.com/es/materiales/uns/j92603.md fr: https://steelequivalents.com/fr/matériaux/uns/j92603.md hu: https://steelequivalents.com/hu/anyagok/uns/j92603.md it: https://steelequivalents.com/it/materiali/uns/j92603.md nl: https://steelequivalents.com/nl/materialen/uns/j92603.md pl: https://steelequivalents.com/pl/materiały/uns/j92603.md pt: https://steelequivalents.com/pt/materiais/uns/j92603.md ru: https://steelequivalents.com/ru/материалы/uns/j92603.md tr: https://steelequivalents.com/tr/malzemeler/uns/j92603.md zh: https://steelequivalents.com/zh/材料/uns/j92603.md ja: https://steelequivalents.com/ja/材料/uns/j92603.md ar: https://steelequivalents.com/ar/المواد/uns/j92603.md ko: https://steelequivalents.com/ko/재료/uns/j92603.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/j92603.md hi: https://steelequivalents.com/hi/सामग्री/uns/j92603.md content_hash: sha256:ac42045c429d2a94dcdffa86f03f4f682920e38c625eb4f11c8bf07755ff3740 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/j92603 > Canonical URL: https://steelequivalents.com/materials/uns/j92603 > 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 · 13 designations # J92603 J92603 is a designation in UNS for the material held under material number 1.4825, also listed as GX25CrNiSi18-9. It is a material in the category Heat-resistant cast steels. We list 13 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, JIS and ČSN. - [*Material no.* **1.4825**](/materials/material-no/1.4825 "Material no.: 1.4825") - [*Category* **Heat-resistant cast steels · 82 grades**](/categories/heat-resistant-cast-steels "Category: Heat-resistant cast steels · 82 grades") - *Designations* **13** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=132d105f-8ce6-4efa-a9fd-7dd92f775c87&designation=ed975b1c-0544-4637-a879-9f3dacb9e91c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/j92603.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN GX25CrNiSi18-9 This grade’s own name](/materials/din-en/gx25crnisi18-9 "DIN / EN GX25CrNiSi18-9") - [UNS J92602 This grade’s own name](/materials/uns/j92602 "UNS J92602") - [AISI / SAE 302mod This grade’s own name](/materials/aisi-sae/302mod "AISI / SAE 302mod") ## 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 13 designations · 5 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 - [GX25CrNiSi18-9 This grade’s own name](/materials/din-en/gx25crnisi18-9 "DIN / EN GX25CrNiSi18-9") UNS United States · 4 - [J92502 Indicative](/materials/uns/j92502 "UNS J92502") - [J92602 This grade’s own name](/materials/uns/j92602 "UNS J92602") - **J92603 This grade’s own name** - [J92803 Indicative](/materials/uns/j92803 "UNS J92803") AISI / SAE United States · 5 - [302mod This grade’s own name](/materials/aisi-sae/302mod "AISI / SAE 302mod") - [J92502 Indicative](/materials/uns/j92502 "AISI / SAE J92502") - [J92602 Indicative](/materials/uns/j92602 "AISI / SAE J92602") - **J92603 Indicative** - [J92803 Indicative](/materials/uns/j92803 "AISI / SAE J92803") JIS Japan · 2 - [SCH31 Indicative](/materials/jis/sch31 "JIS SCH31") - [SCS 12 Indicative](/materials/jis/scs12 "JIS SCS 12") ČSN Czechia · 1 - [422 932 Indicative](/materials/csn/422-932 "ČSN 422 932") 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 — 68.7 % Cr — 18 % Ni — 9 % Mn — 2 % Traces & impurities · 2.3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.15–0.35 | | Si | 0.5–2.5 | | Mn | ≤ 2 | | P | 0.04 | | S | 0.03 | | Cr | 17–19 | | Mo | ≤ 0.5 | | Ni | 8–10 | 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 | 0,15-0,35 | 0.150 | 0.350 | Range | | Si | 0,50-2,50 | 0.500 | 2.500 | Range | | P | 0,04 | 0.040 | 0.040 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 17,0-19,0 | 17.000 | 19.000 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 8,00-10,0 | 8.000 | 10.000 | 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. ## 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. [GX8CrNiNb19-10 1.4827 Cr 18,0-20,0 · Ni 9,00-11,0 - ΔCr 1.00 - ΔNi 1.00 - 1 designations](/materials/din-en/gx8crninb19-10 "GX8CrNiNb19-10") ## 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=132d105f-8ce6-4efa-a9fd-7dd92f775c87&designation=ed975b1c-0544-4637-a879-9f3dacb9e91c "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/j92603.pdf "Datasheet as PDF")