--- title: "STD10 — composition, equivalents and standards" description: "STD10: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/ks/std10 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/ks/std10.md cs: https://steelequivalents.com/cs/materiály/ks/std10.md de: https://steelequivalents.com/de/werkstoffe/ks/std10.md es: https://steelequivalents.com/es/materiales/ks/std10.md fr: https://steelequivalents.com/fr/matériaux/ks/std10.md hu: https://steelequivalents.com/hu/anyagok/ks/std10.md it: https://steelequivalents.com/it/materiali/ks/std10.md nl: https://steelequivalents.com/nl/materialen/ks/std10.md pl: https://steelequivalents.com/pl/materiały/ks/std10.md pt: https://steelequivalents.com/pt/materiais/ks/std10.md ru: https://steelequivalents.com/ru/материалы/ks/std10.md tr: https://steelequivalents.com/tr/malzemeler/ks/std10.md zh: https://steelequivalents.com/zh/材料/ks/std10.md ja: https://steelequivalents.com/ja/材料/ks/std10.md ar: https://steelequivalents.com/ar/المواد/ks/std10.md ko: https://steelequivalents.com/ko/재료/ks/std10.md pt-br: https://steelequivalents.com/pt-br/materiais/ks/std10.md hi: https://steelequivalents.com/hi/सामग्री/ks/std10.md content_hash: sha256:806e71cdeab8f17cfe188987641491ab0d80f135a7d4b82d4a164388632c7a9e 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/ks/std10 > Canonical URL: https://steelequivalents.com/materials/ks/std10 > 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 # STD10 STD10 is a grade designated under KS. Its recorded composition includes C 1.45–1.6%, Si 0.1–0.6%, V 0.7–1%, Cr 11–13% and Mo 0.7–1%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HB 255. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=f975bd2b-f271-4f62-b89b-b80bc920c1d7&designation=9049b616-7009-4840-8132-312220825388 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/std10.pdf "Datasheet as PDF") ## Chemical composition 8 elements on file · weight % What this alloy is Fe Cr C Mo Iron — the balance, never listed by a standard — 84 % Cr — 12 % C — 1.5 % Mo — 0.9 % Traces & impurities · 1.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 1.45–1.6 — Unusual | | Si | 0.1–0.6 | | Mn | 0.2–0.6 | | P | ≤ 0.03 | | S | ≤ 0.03 | | Cr | 11–13 | | Mo | 0.7–1 | | V | 0.7–1 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Vanadium 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 | 1.45 - 1.6 | 1.450 | 1.600 | Range | | Si | 0.1 - 0.6 | 0.100 | 0.600 | Range | | P | max 0.03 | — | 0.030 | Max | | S | max 0.03 | — | 0.030 | Max | | V | 0.7 - 1 | 0.700 | 1.000 | Range | | Cr | 11 - 13 | 11.000 | 13.000 | Range | | Mn | 0.2 - 0.6 | 0.200 | 0.600 | Range | | Mo | 0.7 - 1 | 0.700 | 1.000 | 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. ## 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=f975bd2b-f271-4f62-b89b-b80bc920c1d7&designation=9049b616-7009-4840-8132-312220825388 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/ks/std10.pdf "Datasheet as PDF")