--- title: "SCH24 — Heat-resistant cast steels" description: "SCH24: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/jis/sch24 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/jis/sch24.md cs: https://steelequivalents.com/cs/materiály/jis/sch24.md de: https://steelequivalents.com/de/werkstoffe/jis/sch24.md es: https://steelequivalents.com/es/materiales/jis/sch24.md fr: https://steelequivalents.com/fr/matériaux/jis/sch24.md hu: https://steelequivalents.com/hu/anyagok/jis/sch24.md it: https://steelequivalents.com/it/materiali/jis/sch24.md nl: https://steelequivalents.com/nl/materialen/jis/sch24.md pl: https://steelequivalents.com/pl/materiały/jis/sch24.md pt: https://steelequivalents.com/pt/materiais/jis/sch24.md ru: https://steelequivalents.com/ru/материалы/jis/sch24.md tr: https://steelequivalents.com/tr/malzemeler/jis/sch24.md zh: https://steelequivalents.com/zh/材料/jis/sch24.md ja: https://steelequivalents.com/ja/材料/jis/sch24.md ar: https://steelequivalents.com/ar/المواد/jis/sch24.md ko: https://steelequivalents.com/ko/재료/jis/sch24.md pt-br: https://steelequivalents.com/pt-br/materiais/jis/sch24.md hi: https://steelequivalents.com/hi/सामग्री/jis/sch24.md content_hash: sha256:731c93d2f81e1587cba7bf131cccdd3ed6740e8fb699d4b56ab63d2b6c8f63bc 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/jis/sch24 > Canonical URL: https://steelequivalents.com/materials/jis/sch24 > 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. JIS · Japan · 1 designation # SCH24 SCH24 is a material in the category [Heat-resistant cast steels](/categories/heat-resistant-cast-steels "Heat-resistant cast steels"). Its recorded composition includes C 0.35–0.75%, Si ≤ 2%, Cr 24–28%, Mn ≤ 2% and Ni 33–37%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include Rm 440 N/mm², Re 235 N/mm² and A 5%. - [*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=b8d47b18-ab9b-433a-95fe-e325000a0d3d&designation=0b6c3bca-624e-443b-bfe4-47de1a8bfa53 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/sch24.pdf "Datasheet as PDF") ## 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. ## Chemical composition 8 elements on file · weight % What this alloy is Fe Ni Cr Si Iron — the balance, never listed by a standard — 33.9 % Ni — 35 % Cr — 26 % Si — 2 % Traces & impurities · 3.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.35–0.75 | | Si | ≤ 2 | | Mn | ≤ 2 | | P | ≤ 0.04 | | S | ≤ 0.04 | | Cr | 24–28 | | Mo | ≤ 0.5 | | Ni | 33–37 | 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 | 0.35 - 0.75 | 0.350 | 0.750 | Range | | Si | max 2 | — | 2.000 | Max | | P | max 0.04 | — | 0.040 | Max | | S | max 0.04 | — | 0.040 | Max | | Cr | 24 - 28 | 24.000 | 28.000 | Range | | Mn | max 2 | — | 2.000 | Max | | Ni | 33 - 37 | 33.000 | 37.000 | Range | | Mo | max 0.5 | — | 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 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. ## Properties by condition 1 conditions · 3 values By delivery state**no delivery state stated** source `steeljis` | Delivery state | Rm N/mm² | Re N/mm² | A% | |---|---|---|---| | Casting | 440 | 235 | 5 | Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## 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=b8d47b18-ab9b-433a-95fe-e325000a0d3d&designation=0b6c3bca-624e-443b-bfe4-47de1a8bfa53 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/sch24.pdf "Datasheet as PDF")