--- title: "SPFH540Y — High-strength steels" description: "SPFH540Y: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/jis/spfh540y language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/jis/spfh540y.md cs: https://steelequivalents.com/cs/materiály/jis/spfh540y.md de: https://steelequivalents.com/de/werkstoffe/jis/spfh540y.md es: https://steelequivalents.com/es/materiales/jis/spfh540y.md fr: https://steelequivalents.com/fr/matériaux/jis/spfh540y.md hu: https://steelequivalents.com/hu/anyagok/jis/spfh540y.md it: https://steelequivalents.com/it/materiali/jis/spfh540y.md nl: https://steelequivalents.com/nl/materialen/jis/spfh540y.md pl: https://steelequivalents.com/pl/materiały/jis/spfh540y.md pt: https://steelequivalents.com/pt/materiais/jis/spfh540y.md ru: https://steelequivalents.com/ru/материалы/jis/spfh540y.md tr: https://steelequivalents.com/tr/malzemeler/jis/spfh540y.md zh: https://steelequivalents.com/zh/材料/jis/spfh540y.md ja: https://steelequivalents.com/ja/材料/jis/spfh540y.md ar: https://steelequivalents.com/ar/المواد/jis/spfh540y.md ko: https://steelequivalents.com/ko/재료/jis/spfh540y.md pt-br: https://steelequivalents.com/pt-br/materiais/jis/spfh540y.md hi: https://steelequivalents.com/hi/सामग्री/jis/spfh540y.md content_hash: sha256:ea578347b6de7a210acb4ceff494978742295c5dcd099610392b1f4c43683964 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/spfh540y > Canonical URL: https://steelequivalents.com/materials/jis/spfh540y > 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 # SPFH540Y SPFH540Y is a material in the category [High-strength steels](/categories/high-strength-steels "High-strength steels"). Recorded mechanical properties include Rm 540 N/mm², Re 295 N/mm² and A 24–26%. We hold no composition or cross-standard equivalents for it yet. - [*Category* **High-strength steels · 128 grades**](/categories/high-strength-steels "Category: High-strength steels · 128 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=e51ef53a-117c-47ce-b0c8-6aa8f3a3af7b&designation=8f2c0c48-89e7-4ca1-bd86-e20a86ae0083 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/spfh540y.pdf "Datasheet as PDF") ## About High-strength steels High-strength steels are steels designed to carry high loads while resisting deformation. They are used for load-bearing structures, vehicles and machinery where strength, durability and reduced material weight are important. 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. ## 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% | |---|---|---|---| | Plate/Sheet Hot-rolled | 540 | 295 | 24 – 26 | 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=e51ef53a-117c-47ce-b0c8-6aa8f3a3af7b&designation=8f2c0c48-89e7-4ca1-bd86-e20a86ae0083 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/spfh540y.pdf "Datasheet as PDF")