--- title: "GX 40 CrSi 29 — Heat-resistant cast steels" description: "GX 40 CrSi 29: 6 equivalent designations across 4 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/gx-40-crsi-29 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/gx-40-crsi-29.md cs: https://steelequivalents.com/cs/materiály/din-en/gx-40-crsi-29.md de: https://steelequivalents.com/de/werkstoffe/din-en/gx-40-crsi-29.md es: https://steelequivalents.com/es/materiales/din-en/gx-40-crsi-29.md fr: https://steelequivalents.com/fr/matériaux/din-en/gx-40-crsi-29.md hu: https://steelequivalents.com/hu/anyagok/din-en/gx-40-crsi-29.md it: https://steelequivalents.com/it/materiali/din-en/gx-40-crsi-29.md nl: https://steelequivalents.com/nl/materialen/din-en/gx-40-crsi-29.md pl: https://steelequivalents.com/pl/materiały/din-en/gx-40-crsi-29.md pt: https://steelequivalents.com/pt/materiais/din-en/gx-40-crsi-29.md ru: https://steelequivalents.com/ru/материалы/din-en/gx-40-crsi-29.md tr: https://steelequivalents.com/tr/malzemeler/din-en/gx-40-crsi-29.md zh: https://steelequivalents.com/zh/材料/din-en/gx-40-crsi-29.md ja: https://steelequivalents.com/ja/材料/din-en/gx-40-crsi-29.md ar: https://steelequivalents.com/ar/المواد/din-en/gx-40-crsi-29.md ko: https://steelequivalents.com/ko/재료/din-en/gx-40-crsi-29.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/gx-40-crsi-29.md hi: https://steelequivalents.com/hi/सामग्री/din-en/gx-40-crsi-29.md content_hash: sha256:248ec84eb033450e1474e16ba89ffcdd2b410fd868fddba0ad8d878c0d1ba3d5 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/din-en/gx-40-crsi-29 > Canonical URL: https://steelequivalents.com/materials/din-en/gx-40-crsi-29 > 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. DIN / EN · Europe · 6 designations # GX 40 CrSi 29 GX40CrSi28 is a material in the category [Heat-resistant cast steels](/categories/heat-resistant-cast-steels "Heat-resistant cast steels"), held under material number 1.4776. Its recorded composition includes C 0.3–0.5%, Si 1–2.5%, Cr 27–30%, Mn ≤ 1% and Ni 1%. We list 5 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE and JIS. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.4776**](/materials/material-no/1.4776 "Material no.: 1.4776") - [*Category* **Heat-resistant cast steels · 82 grades**](/categories/heat-resistant-cast-steels "Category: Heat-resistant cast steels · 82 grades") - *Designations* **6** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=4a7d0c5c-81ff-4d35-a660-acba20b1117d&designation=0a58c337-5ba5-4009-8020-e50fd591b8bb "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/gx-40-crsi-29.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN GX40CrSi28 This grade’s own name](/materials/din-en/gx40crsi28 "DIN / EN GX40CrSi28") ## 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 6 designations · 4 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 · 2 - **GX 40 CrSi 29 This grade’s own name Withdrawn** - [GX40CrSi28 This grade’s own name](/materials/din-en/gx40crsi28 "DIN / EN GX40CrSi28") UNS United States · 2 - [J92605 Indicative](/materials/uns/j92605 "UNS J92605") - [J92615 Indicative](/materials/uns/j92615 "UNS J92615") AISI / SAE United States · 1 - [J92605 Indicative](/materials/uns/j92605 "AISI / SAE J92605") JIS Japan · 1 - [SCH 2X2 Indicative](/materials/jis/sch2x2 "JIS SCH 2X2") 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 Si Mn Iron — the balance, never listed by a standard — 66.8 % Cr — 28.5 % Si — 1.8 % Mn — 1 % Traces & impurities · 2 % 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 | ≤ 1 | | P | 0.04 | | S | 0.03 | | Cr | 27–30 | | Mo | ≤ 0.5 | | Ni | 1 | 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 | 27,0-30,0 | 27.000 | 30.000 | Range | | Mn | ≤1,00 | — | 1.000 | Max | | Ni | 1 | 1.000 | 1.000 | Exact | | 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 / Si 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. [GX130CrSi29 1.4777 Cr 27,0-30,0 · Si 1,00-2,50 - ΔCr 0.00 - ΔSi 0.00 - 1 designations](/materials/din-en/gx130crsi29 "GX130CrSi29")[GX40CrNiSi27-4 1.4823 Cr 25,0-28,0 · Si 1,00-2,50 - ΔCr 2.00 - ΔSi 0.00 - 6 designations](/materials/din-en/gx40crnisi27-4 "GX40CrNiSi27-4")[1.4837 1.4837 Cr 24,0-27,0 · Si 1,00-2,50 - ΔCr 3.00 - ΔSi 0.00 - 20 designations](/materials/material-no/1.4837 "1.4837")[GX40CrNiSi25-20 1.4848 Cr 24,0-27,0 · Si 1,00-2,50 - ΔCr 3.00 - ΔSi 0.00 - 20 designations](/materials/din-en/gx40crnisi25-20 "GX40CrNiSi25-20")[GX40NiCrSiNb35-26 1.4852 Cr 24,0-27,0 · Si 1,00-2,50 - ΔCr 3.00 - ΔSi 0.00 - 2 designations](/materials/din-en/gx40nicrsinb35-26 "GX40NiCrSiNb35-26")[GX40NiCrSi35-26 1.4857 Cr 24,0-27,0 · Si 1,00-2,50 - ΔCr 3.00 - ΔSi 0.00 - 5 designations](/materials/din-en/gx40nicrsi35-26 "GX40NiCrSi35-26") ## 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=4a7d0c5c-81ff-4d35-a660-acba20b1117d&designation=0a58c337-5ba5-4009-8020-e50fd591b8bb "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/gx-40-crsi-29.pdf "Datasheet as PDF")