--- title: "1.4777 — Heat-resistant cast steels" description: "1.4777 is the material number of the grade also listed as GX130CrSi29. Category: Heat-resistant cast steels. Designations recorded for this grade: 1." canonical: https://steelequivalents.com/materials/material-no/1.4777 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/material-no/1.4777.md cs: https://steelequivalents.com/cs/materiály/číslo-materiálu/1.4777.md de: https://steelequivalents.com/de/werkstoffe/werkstoff-nr/1.4777.md es: https://steelequivalents.com/es/materiales/número-de-material/1.4777.md fr: https://steelequivalents.com/fr/matériaux/numéro-de-matériau/1.4777.md hu: https://steelequivalents.com/hu/anyagok/anyagszám/1.4777.md it: https://steelequivalents.com/it/materiali/numero-materiale/1.4777.md nl: https://steelequivalents.com/nl/materialen/materiaalnummer/1.4777.md pl: https://steelequivalents.com/pl/materiały/numer-materiału/1.4777.md pt: https://steelequivalents.com/pt/materiais/número-do-material/1.4777.md ru: https://steelequivalents.com/ru/материалы/номер-материала/1.4777.md tr: https://steelequivalents.com/tr/malzemeler/malzeme-numarası/1.4777.md zh: https://steelequivalents.com/zh/材料/材料编号/1.4777.md ja: https://steelequivalents.com/ja/材料/材料番号/1.4777.md ar: https://steelequivalents.com/ar/المواد/رقم-المادة/1.4777.md ko: https://steelequivalents.com/ko/재료/재료번호/1.4777.md pt-br: https://steelequivalents.com/pt-br/materiais/número-do-material/1.4777.md hi: https://steelequivalents.com/hi/सामग्री/सामग्री-संख्या/1.4777.md content_hash: sha256:2f8f46d763d3d5c3b7d5b0f295053ac29166ea0392c5553ed66db364d1353a8d 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/1.4777 > Canonical URL: https://steelequivalents.com/materials/material-no/1.4777 > 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 · 1 designation # 1.4777 1.4777 is the material number of the grade also listed as GX130CrSi29. It is a material in the category Heat-resistant cast steels. We list 1 designations recorded for this grade, in the standards DIN / EN. - ***Material no.* **1.4777**** - [*Category* **Heat-resistant cast steels · 82 grades**](/categories/heat-resistant-cast-steels "Category: Heat-resistant cast steels · 82 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=5663cec4-ab35-4fa2-871d-947aa232d699 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4777.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN GX130CrSi29 This grade’s own name](/materials/din-en/gx130crsi29 "DIN / EN GX130CrSi29") ## 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 1 designations · 1 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 - [GX130CrSi29 This grade’s own name](/materials/din-en/gx130crsi29 "DIN / EN GX130CrSi29") 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 C Iron — the balance, never listed by a standard — 66.1 % Cr — 28.5 % Si — 1.8 % C — 1.3 % Traces & impurities · 2.3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 1.2–1.4 — Unusual | | Si | 1–2.5 | | Mn | 0.5–1 | | P | 0.035 | | 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 | 1,20-1,40 | 1.200 | 1.400 | Range | | Si | 1,00-2,50 | 1.000 | 2.500 | Range | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 27,0-30,0 | 27.000 | 30.000 | Range | | Mn | 0,50-1,00 | 0.500 | 1.000 | Range | | 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. [GX40CrSi28 1.4776 Cr 27,0-30,0 · Si 1,00-2,50 - ΔCr 0.00 - ΔSi 0.00 - 6 designations](/materials/din-en/gx40crsi28 "GX40CrSi28")[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=5663cec4-ab35-4fa2-871d-947aa232d699 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.4777.pdf "Datasheet as PDF")