--- title: "ВНЛ-4 — Unalloyed structural steels" description: "ВНЛ-4 in GOST: material number 1.0040, also listed as Ust 42-2. Category: Unalloyed structural steels. Designations recorded for this grade: 19." canonical: https://steelequivalents.com/materials/gost/vnl-4 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gost/vnl-4.md cs: https://steelequivalents.com/cs/materiály/gost/vnl-4.md de: https://steelequivalents.com/de/werkstoffe/gost/vnl-4.md es: https://steelequivalents.com/es/materiales/gost/vnl-4.md fr: https://steelequivalents.com/fr/matériaux/gost/vnl-4.md hu: https://steelequivalents.com/hu/anyagok/gost/vnl-4.md it: https://steelequivalents.com/it/materiali/gost/vnl-4.md nl: https://steelequivalents.com/nl/materialen/gost/vnl-4.md pl: https://steelequivalents.com/pl/materiały/gost/vnl-4.md pt: https://steelequivalents.com/pt/materiais/gost/vnl-4.md ru: https://steelequivalents.com/ru/материалы/gost/внл-4.md tr: https://steelequivalents.com/tr/malzemeler/gost/vnl-4.md zh: https://steelequivalents.com/zh/材料/gost/vnl-4.md ja: https://steelequivalents.com/ja/材料/gost/vnl-4.md ar: https://steelequivalents.com/ar/المواد/gost/vnl-4.md ko: https://steelequivalents.com/ko/재료/gost/vnl-4.md pt-br: https://steelequivalents.com/pt-br/materiais/gost/vnl-4.md hi: https://steelequivalents.com/hi/सामग्री/gost/vnl-4.md content_hash: sha256:9a07a5f0231dfaf24dde614eac59b9a251631e211cc89c4348d8c167ea6ec2aa 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/vnl-4 > Canonical URL: https://steelequivalents.com/materials/gost/vnl-4 > 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 · 19 designations # ВНЛ-4 ВНЛ-4 is a designation in GOST for the material held under material number 1.0040, also listed as Ust 42-2. It is a material in the category Unalloyed structural steels. We list 19 designations recorded for this grade, in the standards DIN / EN, AISI / SAE, BS, AFNOR, JIS, GOST, ČSN, PN and ÖNORM. - [*Material no.* **1.0040**](/materials/material-no/1.0040 "Material no.: 1.0040") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **19** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=ac24da5a-e8f9-4d9c-9336-e26852a11a27&designation=d5f28635-0eb8-473e-bbff-3bd3f6fece14 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/vnl-4.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN Ust 42-2 This grade’s own name](/materials/din-en/ust-42-2 "DIN / EN Ust 42-2") ## About Unalloyed structural steels Unalloyed structural steels include all low-carbon steels in which the iron companions do not exceed specified minimum values. The yield strength, formability and weldability are the decisive factors for their use. They are soft, pliable, tough and stretchy, but cannot be hardened by heat treatment. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 19 designations · 9 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. DIN / EN Europe · 1 - [Ust 42-2 This grade’s own name](/materials/din-en/ust-42-2 "DIN / EN Ust 42-2") AISI / SAE United States · 1 - [1020 Indicative](/materials/aisi-sae/1020 "AISI / SAE 1020") BS United Kingdom · 2 - [43/25HR Indicative](/materials/bs/43-25hr "BS 43/25HR") - [43/25HS Indicative](/materials/bs/43-25hs "BS 43/25HS") AFNOR France · 1 - [E25-2 Indicative](/materials/afnor/e25-2 "AFNOR E25-2") JIS Japan · 1 - [SS41 Indicative](/materials/jis/ss41 "JIS SS41") GOST Russia / CIS · 9 - [07Kh21N9S2ML Indicative](/materials/gost/07kh21n9s2ml "GOST 07Kh21N9S2ML") - [07Х21Н9С2МЛ Indicative](/materials/gost/07kh21n9s2ml "GOST 07Х21Н9С2МЛ") - [40ХСМФ Indicative](/materials/gost/40khsmf "GOST 40ХСМФ") - [4KHMFS Indicative](/materials/gost/4khmfs "GOST 4KHMFS") - [PZhV4 Indicative](/materials/gost/pzhv4 "GOST PZhV4") - [VSt4kp Indicative](/materials/gost/vst4kp "GOST VSt4kp") - [VSt4ps Indicative](/materials/gost/vst4ps "GOST VSt4ps") - **ВНЛ-4 Indicative** - [ВСт4кп Indicative](/materials/gost/vst4kp "GOST ВСт4кп") ČSN Czechia · 1 - [11423 Indicative](/materials/csn/11423 "ČSN 11423") PN Poland · 1 - [St3SX Indicative](/materials/pn/st3sx "PN St3SX") ÖNORM Austria · 2 - [St42RG Indicative](/materials/onorm/st42rg "ÖNORM St42RG") - [St42RGT Indicative](/materials/onorm/st42rgt "ÖNORM St42RGT") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Mn C P Iron — the balance, never listed by a standard — 99.3 % Mn — 0.4 % C — 0.3 % P — 0.1 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.25 | | Si | Trace | | Mn | 0.2–0.5 | | P | 0.05 | | S | 0.05 | | N | 0.007 | Carbon Silicon Manganese Phosphorus Sulfur Nitrogen 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 | ≤0,25 | — | 0.250 | Max | | N | 0,007 | 0.007 | 0.007 | Exact | | Si | Spuren/Traces | — | — | Trace | | P | 0,05 | 0.050 | 0.050 | Exact | | S | 0,05 | 0.050 | 0.050 | Exact | | Mn | 0,20-0,50 | 0.200 | 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 Not enough recorded composition to predict a transformation temperature for this grade — missing: Si, Ni, Cr, Mo. ## Physical & mechanical properties Density 7,85 g/cm³ Exact Transformation point Ac1 735 °C Exact Transformation point Ac3 840 °C Exact · Ac3(Acm) Transformation point Ar3 825 °C Exact · Ar3(Arcm) Transformation point Ar1 680 °C Exact Weldability weldable with restrictions As published: limited weldability. Flake sensitivity not susceptible As published: not predisposed Temper brittleness not susceptible As published: not predisposed 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 · 10 values By dimension**As-delivered state** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | |---|---|---|---| | to 20 | 400 – 510 | 255 | 25 | | 20 - 40 | 400 – 510 | 245 | 24 | | 40 - 100 | 400 – 510 | 235 | 22 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | |---|---| | 20 | 7.85 | 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=ac24da5a-e8f9-4d9c-9336-e26852a11a27&designation=d5f28635-0eb8-473e-bbff-3bd3f6fece14 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/vnl-4.pdf "Datasheet as PDF")