--- title: "1.4825 — Heat-resistant cast steels" description: "1.4825 is the material number of the grade also listed as GX25CrNiSi18-9. Category: Heat-resistant cast steels. Designations recorded for this grade: 13." canonical: https://steelequivalents.com/materials/material-no/1.4825 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.4825.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.4825.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.4825.md es: https://steelequivalents.com/es/materiales/número-de-material/1.4825.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.4825.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.4825.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.4825.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.4825.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.4825.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.4825.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.4825.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.4825.md zh: https://steelequivalents.com/zh/材料/材料编号/1.4825.md ja: https://steelequivalents.com/ja/材料/材料番号/1.4825.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.4825.md ko: https://steelequivalents.com/ko/재료/재료번호/1.4825.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.4825.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.4825.md content_hash: sha256:d7fdd29802daf03d37b6820e8e1ca5d04e35bf408e0f6e2bc668b849e4f6c227 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/1.4825 > Canonical URL: https://steelequivalents.com/materials/material-no/1.4825 > 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 · 13 designations # 1.4825 1.4825 is the material number of the grade 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**** - [*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 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4825.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](/materials/uns/j92603 "UNS J92603") - [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](/materials/uns/j92603 "AISI / SAE J92603") - [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 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4825.pdf "Datasheet as PDF")