--- title: "3И2 — composition, equivalents and standards" description: "3И2: 3 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/gost/3i2 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gost/3i2.md cs: https://steelequivalents.com/cs/materiály/gost/3i2.md de: https://steelequivalents.com/de/werkstoffe/gost/3i2.md es: https://steelequivalents.com/es/materiales/gost/3i2.md fr: https://steelequivalents.com/fr/matériaux/gost/3i2.md hu: https://steelequivalents.com/hu/anyagok/gost/3i2.md it: https://steelequivalents.com/it/materiali/gost/3i2.md nl: https://steelequivalents.com/nl/materialen/gost/3i2.md pl: https://steelequivalents.com/pl/materiały/gost/3i2.md pt: https://steelequivalents.com/pt/materiais/gost/3i2.md ru: https://steelequivalents.com/ru/материалы/gost/3и2.md tr: https://steelequivalents.com/tr/malzemeler/gost/3i2.md zh: https://steelequivalents.com/zh/材料/gost/3i2.md ja: https://steelequivalents.com/ja/材料/gost/3i2.md ar: https://steelequivalents.com/ar/المواد/gost/3i2.md ko: https://steelequivalents.com/ko/재료/gost/3i2.md pt-br: https://steelequivalents.com/pt-br/materiais/gost/3i2.md hi: https://steelequivalents.com/hi/सामग्री/gost/3i2.md content_hash: sha256:0ea9f60a36928c387bf58158e47f677661e9f0364c874b4a7ec257897712d9b6 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/3i2 > Canonical URL: https://steelequivalents.com/materials/gost/3i2 > 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 · 3 designations # 3И2 4KH3VMF is a grade designated under GOST. Its recorded composition includes C 0.4–0.48%, Si 0.6–0.9%, V 0.6–0.9%, Cr 2.8–3.5% and W 0.6–1%. We list 2 designations recorded for this grade, in the standards GOST. Recorded mechanical properties include Rm 1720 N/mm², Re 1520 N/mm², HB 241 and KCU 560 kJ/m². Recorded transformation points: Ac1 800 °C, Ac3 850 °C, Ar1 730 °C and Ar3 760 °C. - *Designations* **3** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=ce9adacc-7138-4bbe-bf2c-b43d88b46a7d&designation=bb521346-dcbc-47cf-9e7c-8480034bddb3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/3i2.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [GOST 4KH3VMF This grade’s own name](/materials/gost/4kh3vmf "GOST 4KH3VMF") ## Also known as 3 designations · 1 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. GOST Russia / CIS · 3 - **3И2 Indicative** - [4KH3VMF This grade’s own name](/materials/gost/4kh3vmf "GOST 4KH3VMF") - [4Х3ВМФ Indicative](/materials/gost/4kh3vmf "GOST 4Х3ВМФ") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 11 elements on file · weight % What this alloy is Fe Cr W Si Iron — the balance, never listed by a standard — 92.4 % Cr — 3.2 % W — 0.8 % Si — 0.8 % Traces & impurities · 2.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.4–0.48 | | Si | 0.6–0.9 | | Mn | 0.3–0.6 | | P | ≤ 0.03 | | S | ≤ 0.03 | | Cr | 2.8–3.5 | | Mo | 0.4–0.6 | | Ni | ≤ 0.4 | | V | 0.6–0.9 | | W | 0.6–1 | | Cu | ≤ 0.3 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel Vanadium Tungsten Copper 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 | 0.4 - 0.48 | 0.400 | 0.480 | Range | | Si | 0.6 - 0.9 | 0.600 | 0.900 | Range | | P | max 0.03 | — | 0.030 | Max | | S | max 0.03 | — | 0.030 | Max | | V | 0.6 - 0.9 | 0.600 | 0.900 | Range | | Cr | 2.8 - 3.5 | 2.800 | 3.500 | Range | | Mn | 0.3 - 0.6 | 0.300 | 0.600 | Range | | Ni | max 0.4 | — | 0.400 | Max | | Cu | max 0.3 | — | 0.300 | Max | | Mo | 0.4 - 0.6 | 0.400 | 0.600 | Range | | W | 0.6 - 1 | 0.600 | 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 This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here. ## Physical & mechanical properties Transformation point Ac1 800 °C Exact Transformation point Ac3 850 °C Exact · Ac3(Acm) Transformation point Ar3 760 °C Exact · Ar3(Arcm) Transformation point Ar1 730 °C Exact 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. ## Properties by condition 2 conditions · 4 values By dimension**Quenching 1040 - 1060°C, oil, Drawing 560 - 580°C,Drawing 530 - 570°C** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | KCU kJ/m² | |---|---|---|---| | 10 | 1720 | 1520 | 560 | By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | 4KH3VMF ( 4Х3ВМФ ) (annealing) , GOST 5950-2000 | 241 | Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## 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=ce9adacc-7138-4bbe-bf2c-b43d88b46a7d&designation=bb521346-dcbc-47cf-9e7c-8480034bddb3 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/3i2.pdf "Datasheet as PDF")