--- title: "SWRM4 — composition, equivalents and standards" description: "SWRM4: 2 equivalent designations across 2 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/jis/swrm4 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/jis/swrm4.md cs: https://steelequivalents.com/cs/materiály/jis/swrm4.md de: https://steelequivalents.com/de/werkstoffe/jis/swrm4.md es: https://steelequivalents.com/es/materiales/jis/swrm4.md fr: https://steelequivalents.com/fr/matériaux/jis/swrm4.md hu: https://steelequivalents.com/hu/anyagok/jis/swrm4.md it: https://steelequivalents.com/it/materiali/jis/swrm4.md nl: https://steelequivalents.com/nl/materialen/jis/swrm4.md pl: https://steelequivalents.com/pl/materiały/jis/swrm4.md pt: https://steelequivalents.com/pt/materiais/jis/swrm4.md ru: https://steelequivalents.com/ru/материалы/jis/swrm4.md tr: https://steelequivalents.com/tr/malzemeler/jis/swrm4.md zh: https://steelequivalents.com/zh/材料/jis/swrm4.md ja: https://steelequivalents.com/ja/材料/jis/swrm4.md ar: https://steelequivalents.com/ar/المواد/jis/swrm4.md ko: https://steelequivalents.com/ko/재료/jis/swrm4.md pt-br: https://steelequivalents.com/pt-br/materiais/jis/swrm4.md hi: https://steelequivalents.com/hi/सामग्री/jis/swrm4.md content_hash: sha256:34e1aa97cd89344cecf9c00704ca559118bcf8a050df93bd9540b815b43fd1c1 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/swrm4 > Canonical URL: https://steelequivalents.com/materials/jis/swrm4 > 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 · 2 designations # SWRM4 SWRM4 is a grade designated under JIS. Its recorded composition includes C ≤ 0.06%, P ≤ 0.04%, S ≤ 0.04% and Mn ≤ 0.6%. We list one designation recorded for this grade, in the standard KS. - *Designations* **2** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=0f5bc99f-1e91-41f7-818d-81e9803a9e57&designation=f34ad99b-9f5a-46ef-ac7c-f0b0d2fb9b8b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/swrm4.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - **KS SWRM4 This grade’s own name** ## Also known as 2 designations · 2 standards · nothing hidden This grade’s own name recorded in our sources as this grade’s own designation under that standard. Indicative taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering. Withdrawn designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once. JIS Japan · 1 - **SWRM4 This grade’s own name** KS South Korea · 1 - **SWRM4 This grade’s own name** Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 4 elements on file · weight % What this alloy is Fe Mn C P Iron — the balance, never listed by a standard — 99.3 % Mn — 0.6 % C — 0.1 % P — 0 % Traces & impurities · 0 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.06 | | Mn | ≤ 0.6 | | P | ≤ 0.04 | | S | ≤ 0.04 | Carbon Manganese Phosphorus Sulfur 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 0.06 | — | 0.060 | Max | | P | max 0.04 | — | 0.040 | Max | | S | max 0.04 | — | 0.040 | Max | | Mn | max 0.6 | — | 0.600 | 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 Not enough recorded composition to predict a transformation temperature for this grade — missing: 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=0f5bc99f-1e91-41f7-818d-81e9803a9e57&designation=f34ad99b-9f5a-46ef-ac7c-f0b0d2fb9b8b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/swrm4.pdf "Datasheet as PDF")