--- title: "PK40N3D2Kh — composition, equivalents and standards" description: "PK40N3D2Kh is a designation in GOST for the grade also listed as 40Kh3G2MF. We list 5 designations recorded for this grade, in the standards GOST." canonical: https://steelequivalents.com/materials/gost/pk40n3d2kh language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gost/pk40n3d2kh.md cs: https://steelequivalents.com/cs/materiály/gost/pk40n3d2kh.md de: https://steelequivalents.com/de/werkstoffe/gost/pk40n3d2kh.md es: https://steelequivalents.com/es/materiales/gost/pk40n3d2kh.md fr: https://steelequivalents.com/fr/matériaux/gost/pk40n3d2kh.md hu: https://steelequivalents.com/hu/anyagok/gost/pk40n3d2kh.md it: https://steelequivalents.com/it/materiali/gost/pk40n3d2kh.md nl: https://steelequivalents.com/nl/materialen/gost/pk40n3d2kh.md pl: https://steelequivalents.com/pl/materiały/gost/pk40n3d2kh.md pt: https://steelequivalents.com/pt/materiais/gost/pk40n3d2kh.md ru: https://steelequivalents.com/ru/материалы/gost/pk40n3d2kh.md tr: https://steelequivalents.com/tr/malzemeler/gost/pk40n3d2kh.md zh: https://steelequivalents.com/zh/材料/gost/pk40n3d2kh.md ja: https://steelequivalents.com/ja/材料/gost/pk40n3d2kh.md ar: https://steelequivalents.com/ar/المواد/gost/pk40n3d2kh.md ko: https://steelequivalents.com/ko/재료/gost/pk40n3d2kh.md pt-br: https://steelequivalents.com/pt-br/materiais/gost/pk40n3d2kh.md hi: https://steelequivalents.com/hi/सामग्री/gost/pk40n3d2kh.md content_hash: sha256:20f44cbc2f24a08f8daa1181f16526dbed21e3e43f5cabce441948a1cee36d4b 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/pk40n3d2kh > Canonical URL: https://steelequivalents.com/materials/gost/pk40n3d2kh > 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 · 5 designations # PK40N3D2Kh PK40N3D2Kh is a designation in GOST for the grade also listed as 40Kh3G2MF. We list 5 designations recorded for this grade, in the standards GOST. - *Designations* **5** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=7e8d4f0f-9480-4485-be53-8b212ca937b8&designation=5146fcb5-f68d-4832-8903-ea1f050ce091 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/pk40n3d2kh.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [GOST 40Kh3G2MF This grade’s own name](/materials/gost/40kh3g2mf "GOST 40Kh3G2MF") ## Also known as 5 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 · 5 - [40Kh3G2MF This grade’s own name](/materials/gost/40kh3g2mf "GOST 40Kh3G2MF") - [40Х3Г2МФ Indicative](/materials/gost/40kh3g2mf "GOST 40Х3Г2МФ") - **PK40N3D2Kh Indicative** - [ПК40Н3Д2Х-6.4 Indicative](/materials/gost/pk40n3d2kh-6-4 "GOST ПК40Н3Д2Х-6.4") - [ПК40Н3Д2Х-6.8 Indicative](/materials/gost/pk40n3d2kh-6-8 "GOST ПК40Н3Д2Х-6.8") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 9 elements on file · weight % What this alloy is Fe Cr Mn Si Iron — the balance, never listed by a standard — 92.9 % Cr — 3.6 % Mn — 1.6 % Si — 0.6 % Traces & impurities · 1.4 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.35–0.45 | | Si | 0.4–0.7 | | Mn | 1.3–1.8 | | P | ≤ 0.035 | | S | ≤ 0.035 | | Cr | 3.3–3.8 | | Mo | 0.3–0.5 | | Ni | ≤ 0.4 | | V | 0.1–0.2 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Nickel 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 | 0.35 - 0.45 | 0.350 | 0.450 | Range | | Si | 0.4 - 0.7 | 0.400 | 0.700 | Range | | P | max 0.035 | — | 0.035 | Max | | S | max 0.035 | — | 0.035 | Max | | V | 0.1 - 0.2 | 0.100 | 0.200 | Range | | Cr | 3.3 - 3.8 | 3.300 | 3.800 | Range | | Mn | 1.3 - 1.8 | 1.300 | 1.800 | Range | | Ni | max 0.4 | — | 0.400 | Max | | Mo | 0.3 - 0.5 | 0.300 | 0.500 | 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 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 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=7e8d4f0f-9480-4485-be53-8b212ca937b8&designation=5146fcb5-f68d-4832-8903-ea1f050ce091 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/pk40n3d2kh.pdf "Datasheet as PDF")