--- title: "SSC21 — Heat-resistant cast steels" description: "SSC21: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/ks/ssc21 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/ks/ssc21.md cs: https://steelequivalents.com/cs/materiály/ks/ssc21.md de: https://steelequivalents.com/de/werkstoffe/ks/ssc21.md es: https://steelequivalents.com/es/materiales/ks/ssc21.md fr: https://steelequivalents.com/fr/matériaux/ks/ssc21.md hu: https://steelequivalents.com/hu/anyagok/ks/ssc21.md it: https://steelequivalents.com/it/materiali/ks/ssc21.md nl: https://steelequivalents.com/nl/materialen/ks/ssc21.md pl: https://steelequivalents.com/pl/materiały/ks/ssc21.md pt: https://steelequivalents.com/pt/materiais/ks/ssc21.md ru: https://steelequivalents.com/ru/материалы/ks/ssc21.md tr: https://steelequivalents.com/tr/malzemeler/ks/ssc21.md zh: https://steelequivalents.com/zh/材料/ks/ssc21.md ja: https://steelequivalents.com/ja/材料/ks/ssc21.md ar: https://steelequivalents.com/ar/المواد/ks/ssc21.md ko: https://steelequivalents.com/ko/재료/ks/ssc21.md pt-br: https://steelequivalents.com/pt-br/materiais/ks/ssc21.md hi: https://steelequivalents.com/hi/सामग्री/ks/ssc21.md content_hash: sha256:49db7f320dc83785c45b94024f51709ceac3f99b7787a504df5ca894ff0f1cc8 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/ks/ssc21 > Canonical URL: https://steelequivalents.com/materials/ks/ssc21 > 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. KS · South Korea · 1 designation # SSC21 SSC21 is a material in the category [Heat-resistant cast steels](/categories/heat-resistant-cast-steels "Heat-resistant cast steels"). Recorded mechanical properties include Rm 482 N/mm², Re 207 N/mm² and A 30%. We hold no composition or cross-standard equivalents for it yet. - [*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=f84b2d83-3874-4f4d-b378-2f98fdde27fa&designation=7eb7cf37-9b5a-4cbb-81f3-531363d6c2d3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/ssc21.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. ## Predicted transformation temperatures Not enough recorded composition to predict a transformation temperature for this grade — missing: C, Mn, Si, Ni, Cr, Mo. ## 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. ## 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=f84b2d83-3874-4f4d-b378-2f98fdde27fa&designation=7eb7cf37-9b5a-4cbb-81f3-531363d6c2d3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/ssc21.pdf "Datasheet as PDF")