--- title: "SSC18 — Heat-resistant cast steels" description: "SSC18: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/ks/ssc18 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/ks/ssc18.md cs: https://steelequivalents.com/cs/materiály/ks/ssc18.md de: https://steelequivalents.com/de/werkstoffe/ks/ssc18.md es: https://steelequivalents.com/es/materiales/ks/ssc18.md fr: https://steelequivalents.com/fr/matériaux/ks/ssc18.md hu: https://steelequivalents.com/hu/anyagok/ks/ssc18.md it: https://steelequivalents.com/it/materiali/ks/ssc18.md nl: https://steelequivalents.com/nl/materialen/ks/ssc18.md pl: https://steelequivalents.com/pl/materiały/ks/ssc18.md pt: https://steelequivalents.com/pt/materiais/ks/ssc18.md ru: https://steelequivalents.com/ru/материалы/ks/ssc18.md tr: https://steelequivalents.com/tr/malzemeler/ks/ssc18.md zh: https://steelequivalents.com/zh/材料/ks/ssc18.md ja: https://steelequivalents.com/ja/材料/ks/ssc18.md ar: https://steelequivalents.com/ar/المواد/ks/ssc18.md ko: https://steelequivalents.com/ko/재료/ks/ssc18.md pt-br: https://steelequivalents.com/pt-br/materiais/ks/ssc18.md hi: https://steelequivalents.com/hi/सामग्री/ks/ssc18.md content_hash: sha256:2b1e43fb2680b86be3b2ff751ad75f3d7c6f9016cd0632b1c83784b4c6193682 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/ssc18 > Canonical URL: https://steelequivalents.com/materials/ks/ssc18 > 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 # SSC18 SSC18 is a material in the category [Heat-resistant cast steels](/categories/heat-resistant-cast-steels "Heat-resistant cast steels"). Its recorded composition includes C ≤ 0.02%, Si ≤ 2%, Cr 23–27%, Mn ≤ 2% and Ni 19–22%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include Rm 482 N/mm², Re 207 N/mm² and A 30%. - [*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=51df16ce-dbc6-469a-b7ca-cf0fa4551ce6&designation=73e18ae7-cdc6-41e8-a227-1dec34a338e4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/ssc18.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 7 elements on file · weight % What this alloy is Fe Cr Ni Si Iron — the balance, never listed by a standard — 50.4 % Cr — 25 % Ni — 20.5 % Si — 2 % Traces & impurities · 2.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.02 | | Si | ≤ 2 | | Mn | ≤ 2 | | P | ≤ 0.04 | | S | ≤ 0.04 | | Cr | 23–27 | | Ni | 19–22 | Carbon Silicon Manganese Phosphorus Sulfur Chromium 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 | max 0.02 | — | 0.020 | Max | | Si | max 2 | — | 2.000 | Max | | P | max 0.04 | — | 0.040 | Max | | S | max 0.04 | — | 0.040 | Max | | Cr | 23 - 27 | 23.000 | 27.000 | Range | | Mn | max 2 | — | 2.000 | Max | | Ni | 19 - 22 | 19.000 | 22.000 | Range | 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 Not enough recorded composition to predict a transformation temperature for this grade — missing: 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=51df16ce-dbc6-469a-b7ca-cf0fa4551ce6&designation=73e18ae7-cdc6-41e8-a227-1dec34a338e4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/ssc18.pdf "Datasheet as PDF")