--- title: "FCMB300-6 — Cast iron" description: "FCMB300-6: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/jis/fcmb300-6 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/jis/fcmb300-6.md cs: https://steelequivalents.com/cs/materiály/jis/fcmb300-6.md de: https://steelequivalents.com/de/werkstoffe/jis/fcmb300-6.md es: https://steelequivalents.com/es/materiales/jis/fcmb300-6.md fr: https://steelequivalents.com/fr/matériaux/jis/fcmb300-6.md hu: https://steelequivalents.com/hu/anyagok/jis/fcmb300-6.md it: https://steelequivalents.com/it/materiali/jis/fcmb300-6.md nl: https://steelequivalents.com/nl/materialen/jis/fcmb300-6.md pl: https://steelequivalents.com/pl/materiały/jis/fcmb300-6.md pt: https://steelequivalents.com/pt/materiais/jis/fcmb300-6.md ru: https://steelequivalents.com/ru/материалы/jis/fcmb300-6.md tr: https://steelequivalents.com/tr/malzemeler/jis/fcmb300-6.md zh: https://steelequivalents.com/zh/材料/jis/fcmb300-6.md ja: https://steelequivalents.com/ja/材料/jis/fcmb300-6.md ar: https://steelequivalents.com/ar/المواد/jis/fcmb300-6.md ko: https://steelequivalents.com/ko/재료/jis/fcmb300-6.md pt-br: https://steelequivalents.com/pt-br/materiais/jis/fcmb300-6.md hi: https://steelequivalents.com/hi/सामग्री/jis/fcmb300-6.md content_hash: sha256:8982c50e9edf60944b5ce50aa4bfe3bbf6a7fcd96b65f1a1788865ad5fc3b4d4 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/jis/fcmb300-6 > Canonical URL: https://steelequivalents.com/materials/jis/fcmb300-6 > 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 # FCMB300-6 FCMB300-6 is a material in the category [Cast iron](/categories/cast-iron "Cast iron"). Recorded mechanical properties include Rm 300 N/mm², A 6% and HB 150. We hold no composition or cross-standard equivalents for it yet. - [*Category* **Cast iron · 73 grades**](/categories/cast-iron "Category: Cast iron · 73 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=0e14a277-5432-4cec-9d80-d018ee0b8950&designation=c1964fca-b60d-4630-9bde-5dbaf9901bc5 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/fcmb300-6.pdf "Datasheet as PDF") ## About Cast iron Cast iron is an iron-based casting alloy whose properties depend on its composition and microstructure. It is characterised by good castability and a range of hardness, strength, and ductility, making it suitable for machine bases, housings, pipes, engine components, and wear-resistant parts. 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=0e14a277-5432-4cec-9d80-d018ee0b8950&designation=c1964fca-b60d-4630-9bde-5dbaf9901bc5 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/fcmb300-6.pdf "Datasheet as PDF")