--- title: "АCHS-5 — composition, equivalents and standards" description: "АCHS-5: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/gost/achs-5 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gost/achs-5.md cs: https://steelequivalents.com/cs/materiály/gost/achs-5.md de: https://steelequivalents.com/de/werkstoffe/gost/achs-5.md es: https://steelequivalents.com/es/materiales/gost/achs-5.md fr: https://steelequivalents.com/fr/matériaux/gost/achs-5.md hu: https://steelequivalents.com/hu/anyagok/gost/achs-5.md it: https://steelequivalents.com/it/materiali/gost/achs-5.md nl: https://steelequivalents.com/nl/materialen/gost/achs-5.md pl: https://steelequivalents.com/pl/materiały/gost/achs-5.md pt: https://steelequivalents.com/pt/materiais/gost/achs-5.md ru: https://steelequivalents.com/ru/материалы/gost/аchs-5.md tr: https://steelequivalents.com/tr/malzemeler/gost/achs-5.md zh: https://steelequivalents.com/zh/材料/gost/achs-5.md ja: https://steelequivalents.com/ja/材料/gost/achs-5.md ar: https://steelequivalents.com/ar/المواد/gost/achs-5.md ko: https://steelequivalents.com/ko/재료/gost/achs-5.md pt-br: https://steelequivalents.com/pt-br/materiais/gost/achs-5.md hi: https://steelequivalents.com/hi/सामग्री/gost/achs-5.md content_hash: sha256:9a10a11acf66fc3ab81e3e1dd691552efba40520628278a4d1c277037f71e903 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/gost/achs-5 > Canonical URL: https://steelequivalents.com/materials/gost/achs-5 > 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. GOST · Russia / CIS · 1 designation # АCHS-5 АCHS-5 is a grade designated under GOST. Its recorded composition includes C 3.5–4.3%, Al 0.4–0.8%, Si 2.5–3.5%, P ≤ 0.2% and Mn 7.5–12.5%. No cross-standard equivalents are recorded for this grade yet. - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=0426d0c8-f5e1-4de4-84aa-e558e33ed4c4&designation=28a78529-da60-4691-8ee5-10d7cd4ef1b5 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/achs-5.pdf "Datasheet as PDF") ## Chemical composition 6 elements on file · weight % What this alloy is Fe Mn C Si Iron — the balance, never listed by a standard — 82.3 % Mn — 10 % C — 3.9 % Si — 3 % Traces & impurities · 0.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 3.5–4.3 — Unusual | | Si | 2.5–3.5 — Unusual | | Mn | 7.5–12.5 — Unusual | | P | ≤ 0.2 — Unusual | | S | ≤ 0.05 | | Al | 0.4–0.8 | Carbon Silicon Manganese Phosphorus Sulfur Aluminium 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 | 3.5 - 4.3 | 3.500 | 4.300 | Range | | Al | 0.4 - 0.8 | 0.400 | 0.800 | Range | | Si | 2.5 - 3.5 | 2.500 | 3.500 | Range | | P | max 0.2 | — | 0.200 | Max | | S | max 0.05 | — | 0.050 | Max | | Mn | 7.5 - 12.5 | 7.500 | 12.500 | 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, 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=0426d0c8-f5e1-4de4-84aa-e558e33ed4c4&designation=28a78529-da60-4691-8ee5-10d7cd4ef1b5 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/achs-5.pdf "Datasheet as PDF")