--- title: "STS41 — composition, equivalents and standards" description: "STS41: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/ks/sts41 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/ks/sts41.md cs: https://steelequivalents.com/cs/materiály/ks/sts41.md de: https://steelequivalents.com/de/werkstoffe/ks/sts41.md es: https://steelequivalents.com/es/materiales/ks/sts41.md fr: https://steelequivalents.com/fr/matériaux/ks/sts41.md hu: https://steelequivalents.com/hu/anyagok/ks/sts41.md it: https://steelequivalents.com/it/materiali/ks/sts41.md nl: https://steelequivalents.com/nl/materialen/ks/sts41.md pl: https://steelequivalents.com/pl/materiały/ks/sts41.md pt: https://steelequivalents.com/pt/materiais/ks/sts41.md ru: https://steelequivalents.com/ru/материалы/ks/sts41.md tr: https://steelequivalents.com/tr/malzemeler/ks/sts41.md zh: https://steelequivalents.com/zh/材料/ks/sts41.md ja: https://steelequivalents.com/ja/材料/ks/sts41.md ar: https://steelequivalents.com/ar/المواد/ks/sts41.md ko: https://steelequivalents.com/ko/재료/ks/sts41.md pt-br: https://steelequivalents.com/pt-br/materiais/ks/sts41.md hi: https://steelequivalents.com/hi/सामग्री/ks/sts41.md content_hash: sha256:c08d5d225b3d91fce3e169f13440e177ac7bf0e3249fba71bfe023f8f2ee5515 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/sts41 > Canonical URL: https://steelequivalents.com/materials/ks/sts41 > 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 # STS41 STS41 is a grade designated under KS. Its recorded composition includes C 0.35–0.45%, Si ≤ 0.35%, Cr 1–1.5%, Mn ≤ 0.5% and W 2.5–3.5%. No cross-standard equivalents are recorded for this grade yet. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=9a26594c-1251-48bc-9c1d-0542597278f0&designation=881b44e0-59a9-48b5-9b52-2b1e25a84f93 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/sts41.pdf "Datasheet as PDF") ## Chemical composition 7 elements on file · weight % What this alloy is Fe W Cr Mn Iron — the balance, never listed by a standard — 94.4 % W — 3 % Cr — 1.3 % Mn — 0.5 % Traces & impurities · 0.8 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.35–0.45 | | Si | ≤ 0.35 | | Mn | ≤ 0.5 | | P | ≤ 0.03 | | S | ≤ 0.03 | | Cr | 1–1.5 | | W | 2.5–3.5 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Tungsten 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 | 0.35 - 0.45 | 0.350 | 0.450 | Range | | Si | max 0.35 | — | 0.350 | Max | | P | max 0.03 | — | 0.030 | Max | | S | max 0.03 | — | 0.030 | Max | | Cr | 1 - 1.5 | 1.000 | 1.500 | Range | | Mn | max 0.5 | — | 0.500 | Max | | W | 2.5 - 3.5 | 2.500 | 3.500 | 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, 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=9a26594c-1251-48bc-9c1d-0542597278f0&designation=881b44e0-59a9-48b5-9b52-2b1e25a84f93 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/sts41.pdf "Datasheet as PDF")