--- title: "N08151 — Heat-resistant cast steels" description: "N08151 in UNS: material number 1.4859, also listed as GX10NiCrNb32-20. Category: Heat-resistant cast steels. Designations recorded for this grade: 6." canonical: https://steelequivalents.com/materials/uns/n08151 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/uns/n08151.md cs: https://steelequivalents.com/cs/materiály/uns/n08151.md de: https://steelequivalents.com/de/werkstoffe/uns/n08151.md es: https://steelequivalents.com/es/materiales/uns/n08151.md fr: https://steelequivalents.com/fr/matériaux/uns/n08151.md hu: https://steelequivalents.com/hu/anyagok/uns/n08151.md it: https://steelequivalents.com/it/materiali/uns/n08151.md nl: https://steelequivalents.com/nl/materialen/uns/n08151.md pl: https://steelequivalents.com/pl/materiały/uns/n08151.md pt: https://steelequivalents.com/pt/materiais/uns/n08151.md ru: https://steelequivalents.com/ru/материалы/uns/n08151.md tr: https://steelequivalents.com/tr/malzemeler/uns/n08151.md zh: https://steelequivalents.com/zh/材料/uns/n08151.md ja: https://steelequivalents.com/ja/材料/uns/n08151.md ar: https://steelequivalents.com/ar/المواد/uns/n08151.md ko: https://steelequivalents.com/ko/재료/uns/n08151.md pt-br: https://steelequivalents.com/pt-br/materiais/uns/n08151.md hi: https://steelequivalents.com/hi/सामग्री/uns/n08151.md content_hash: sha256:bf78f1c7f1d69ac692ade101aef5800c31536f1f5856cf03986d866e78aee7e0 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/n08151 > Canonical URL: https://steelequivalents.com/materials/uns/n08151 > 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 · 6 designations # N08151 N08151 is a designation in UNS for the material held under material number 1.4859, also listed as GX10NiCrNb32-20. It is a material in the category Heat-resistant cast steels. We list 6 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS and JIS. - [*Material no.* **1.4859**](/materials/material-no/1.4859 "Material no.: 1.4859") - [*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=0bb1bac6-1b7e-4538-afb3-d15870271bab&designation=1c60fb80-d7fa-417a-b85e-117188633645 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/n08151.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN GX10NiCrSiNb32-20 This grade’s own name](/materials/din-en/gx10nicrsinb32-20 "DIN / EN GX10NiCrSiNb32-20") ## 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 · 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 · 2 - [GX10NiCrNb32-20 This grade’s own name Withdrawn](/materials/din-en/gx10nicrnb32-20 "DIN / EN GX10NiCrNb32-20") - [GX10NiCrSiNb32-20 This grade’s own name](/materials/din-en/gx10nicrsinb32-20 "DIN / EN GX10NiCrSiNb32-20") UNS United States · 1 - **N08151 This grade’s own name** AISI / SAE United States · 1 - **N08151 Indicative** BS United Kingdom · 1 - [Thermax 532 Indicative](/materials/bs/thermax-532 "BS Thermax 532") JIS Japan · 1 - [SCH 34 Indicative](/materials/jis/sch34 "JIS SCH 34") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 10 elements on file · weight % What this alloy is Fe Ni Cr Mn Iron — the balance, never listed by a standard — 42.8 % Ni — 32 % Cr — 20 % Mn — 2 % Traces & impurities · 3.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.05–0.15 | | Si | 0.5–1.5 | | Mn | ≤ 2 | | P | 0.04 | | S | 0.03 | | Cr | 19–21 | | Mo | ≤ 0.5 | | Ni | 31–33 | | Cu | ≤ 0.5 | | Nb | 0.5–1.5 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Copper Niobium 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 | 0,05-0,15 | 0.050 | 0.150 | Range | | Si | 0,50-1,50 | 0.500 | 1.500 | Range | | P | 0,04 | 0.040 | 0.040 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Cr | 19,0-21,0 | 19.000 | 21.000 | Range | | Mn | ≤2,00 | — | 2.000 | Max | | Ni | 31,0-33,0 | 31.000 | 33.000 | Range | | Cu | ≤0,50 | — | 0.500 | Max | | Nb | 0,50-1,50 | 0.500 | 1.500 | 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. ## 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=0bb1bac6-1b7e-4538-afb3-d15870271bab&designation=1c60fb80-d7fa-417a-b85e-117188633645 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/uns/n08151.pdf "Datasheet as PDF")