--- title: "SWRCHB623 — Cold extrusion steels" description: "SWRCHB623: 2 equivalent designations across 2 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/jis/swrchb623 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/jis/swrchb623.md cs: https://steelequivalents.com/cs/materiály/jis/swrchb623.md de: https://steelequivalents.com/de/werkstoffe/jis/swrchb623.md es: https://steelequivalents.com/es/materiales/jis/swrchb623.md fr: https://steelequivalents.com/fr/matériaux/jis/swrchb623.md hu: https://steelequivalents.com/hu/anyagok/jis/swrchb623.md it: https://steelequivalents.com/it/materiali/jis/swrchb623.md nl: https://steelequivalents.com/nl/materialen/jis/swrchb623.md pl: https://steelequivalents.com/pl/materiały/jis/swrchb623.md pt: https://steelequivalents.com/pt/materiais/jis/swrchb623.md ru: https://steelequivalents.com/ru/материалы/jis/swrchb623.md tr: https://steelequivalents.com/tr/malzemeler/jis/swrchb623.md zh: https://steelequivalents.com/zh/材料/jis/swrchb623.md ja: https://steelequivalents.com/ja/材料/jis/swrchb623.md ar: https://steelequivalents.com/ar/المواد/jis/swrchb623.md ko: https://steelequivalents.com/ko/재료/jis/swrchb623.md pt-br: https://steelequivalents.com/pt-br/materiais/jis/swrchb623.md hi: https://steelequivalents.com/hi/सामग्री/jis/swrchb623.md content_hash: sha256:de8aaeea1109734396be51f8fe24a04c928f9b6fa39fb0c0e00d6db45569d767 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/swrchb623 > Canonical URL: https://steelequivalents.com/materials/jis/swrchb623 > 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 # SWRCHB623 SWRCHB623 is a material in the category [Cold extrusion steels](/categories/cold-extrusion-steels "Cold extrusion steels"). Its recorded composition includes C 0.2–0.26%, Si 0.1–0.35%, P ≤ 0.03%, S ≤ 0.03% and Mn 1.1–1.4%. We list one designation recorded for this grade, in the standard KS. - [*Category* **Cold extrusion steels · 156 grades**](/categories/cold-extrusion-steels "Category: Cold extrusion steels · 156 grades") - *Designations* **2** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=04971aac-bb8a-40a0-a9f8-281f615c8ed5&designation=3e1d29d2-9bdd-4c53-9ffd-5b917327dfeb "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/swrchb623.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - **KS SWRCHB623 This grade’s own name** ## About Cold extrusion steels Cold extrusion steels are engineering materials designed to be shaped into components by cold forming and extrusion. They combine the ductility needed for substantial plastic deformation with the strength and toughness required in cold-formed fasteners, automotive parts and other precision components. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## 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 - **SWRCHB623 This grade’s own name** KS South Korea · 1 - **SWRCHB623 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 6 elements on file · weight % What this alloy is Fe Mn C Si Iron — the balance, never listed by a standard — 98.2 % Mn — 1.3 % C — 0.2 % Si — 0.2 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.2–0.26 | | Si | 0.1–0.35 | | Mn | 1.1–1.4 | | P | ≤ 0.03 | | S | ≤ 0.03 | | B | ≤ 0.0008 | Carbon Silicon Manganese Phosphorus Sulfur Boron 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 | |---|---|---|---|---| | B | max 0.0008 | — | 0.001 | Max | | C | 0.2 - 0.26 | 0.200 | 0.260 | Range | | Si | 0.1 - 0.35 | 0.100 | 0.350 | Range | | P | max 0.03 | — | 0.030 | Max | | S | max 0.03 | — | 0.030 | Max | | Mn | 1.1 - 1.4 | 1.100 | 1.400 | 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: 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=04971aac-bb8a-40a0-a9f8-281f615c8ed5&designation=3e1d29d2-9bdd-4c53-9ffd-5b917327dfeb "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/swrchb623.pdf "Datasheet as PDF")