--- title: "N08030 — Heat-resistant cast steels" description: "N08030 in UNS: material number 1.4865, also listed as GX40NiCrSi38-18. Category: Heat-resistant cast steels. Designations recorded for this grade: 20." canonical: https://steelequivalents.com/materials/uns/n08030 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/n08030.md cs: https://steelequivalents.com/cs/materiály/uns/n08030.md de: https://steelequivalents.com/de/werkstoffe/uns/n08030.md es: https://steelequivalents.com/es/materiales/uns/n08030.md fr: https://steelequivalents.com/fr/matériaux/uns/n08030.md hu: https://steelequivalents.com/hu/anyagok/uns/n08030.md it: https://steelequivalents.com/it/materiali/uns/n08030.md nl: https://steelequivalents.com/nl/materialen/uns/n08030.md pl: https://steelequivalents.com/pl/materiały/uns/n08030.md pt: https://steelequivalents.com/pt/materiais/uns/n08030.md ru: https://steelequivalents.com/ru/материалы/uns/n08030.md tr: https://steelequivalents.com/tr/malzemeler/uns/n08030.md zh: https://steelequivalents.com/zh/材料/uns/n08030.md ja: https://steelequivalents.com/ja/材料/uns/n08030.md ar: https://steelequivalents.com/ar/المواد/uns/n08030.md ko: https://steelequivalents.com/ko/재료/uns/n08030.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/n08030.md hi: https://steelequivalents.com/hi/सामग्री/uns/n08030.md content_hash: sha256:ca9aa49e547e0224cf159356b9e8b28808c330387d1e11cf6c1710da3ffecc4e 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/n08030 > Canonical URL: https://steelequivalents.com/materials/uns/n08030 > 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 # N08030 N08030 is a designation in UNS for the material held under material number 1.4865, also listed as GX40NiCrSi38-18. 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, JIS and UNI. - [*Material no.* **1.4865**](/materials/material-no/1.4865 "Material no.: 1.4865") - [*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=3e706548-95d6-4909-9642-fab0f2add052&designation=71c1520d-a9a0-480c-a854-f671af3d14ae "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/n08030.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN GX40NiCrSi38-19 This grade’s own name](/materials/din-en/gx40nicrsi38-19 "DIN / EN GX40NiCrSi38-19") - [UNS N08002 This grade’s own name](/materials/uns/n08002 "UNS N08002") ## 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 · 6 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 · 3 - [1.4865 Indicative](/materials/material-no/1.4865 "DIN / EN 1.4865") - [GX40NiCrSi38-18 This grade’s own name Withdrawn](/materials/din-en/gx40nicrsi38-18 "DIN / EN GX40NiCrSi38-18") - [GX40NiCrSi38-19 This grade’s own name](/materials/din-en/gx40nicrsi38-19 "DIN / EN GX40NiCrSi38-19") UNS United States · 4 - [N08002 This grade’s own name](/materials/uns/n08002 "UNS N08002") - [N08004 This grade’s own name](/materials/uns/n08004 "UNS N08004") - [N08005 This grade’s own name](/materials/uns/n08005 "UNS N08005") - **N08030 This grade’s own name** AISI / SAE United States · 6 - [HT Indicative](/materials/aisi-sae/ht "AISI / SAE HT") - [HT 50 Indicative](/materials/aisi-sae/ht-50 "AISI / SAE HT 50") - [N08002 Indicative](/materials/uns/n08002 "AISI / SAE N08002") - [N08004 Indicative](/materials/uns/n08004 "AISI / SAE N08004") - [N08005 Indicative](/materials/uns/n08005 "AISI / SAE N08005") - **N08030 Indicative** BS United Kingdom · 3 - [330 C 11 Indicative](/materials/bs/330-c-11 "BS 330 C 11") - [330C40 Indicative](/materials/bs/330c40 "BS 330C40") - [331 C 40 Indicative](/materials/bs/331-c-40 "BS 331 C 40") JIS Japan · 3 - [SCH 16 Indicative](/materials/jis/sch16 "JIS SCH 16") - [SCH 20X Indicative](/materials/jis/sch20x "JIS SCH 20X") - [SCH15 Indicative](/materials/jis/sch15 "JIS SCH15") UNI Italy · 1 - [XG50NiCr3919 Indicative](/materials/uni/xg50nicr3919 "UNI XG50NiCr3919") 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 Ni Cr Mn Iron — the balance, never listed by a standard — 38.3 % Ni — 37.5 % Cr — 19.5 % 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 | 18–21 | | Mo | ≤ 0.5 | | Ni | 36–39 | 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 | 18,0-21,0 | 18.000 | 21.000 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 36,0-39,0 | 36.000 | 39.000 | 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 Ni / Cr 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. [GX40NiCrSiNb38-19 1.4849 Ni 36,0-39,0 · Cr 18,0-21,0 - ΔNi 0.00 - ΔCr 0.00 - 4 designations](/materials/din-en/gx40nicrsinb38-19 "GX40NiCrSiNb38-19") ## 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=3e706548-95d6-4909-9642-fab0f2add052&designation=71c1520d-a9a0-480c-a854-f671af3d14ae "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/n08030.pdf "Datasheet as PDF")