--- title: "LR3 — Unalloyed structural steels" description: "LR3 in GOST: material number 1.0116, also listed as St 37-3 N. Category: Unalloyed structural steels. Designations recorded for this grade: 66." canonical: https://steelequivalents.com/materials/gost/lr3 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/gost/lr3.md cs: https://steelequivalents.com/cs/materiály/gost/lr3.md de: https://steelequivalents.com/de/werkstoffe/gost/lr3.md es: https://steelequivalents.com/es/materiales/gost/lr3.md fr: https://steelequivalents.com/fr/matériaux/gost/lr3.md hu: https://steelequivalents.com/hu/anyagok/gost/lr3.md it: https://steelequivalents.com/it/materiali/gost/lr3.md nl: https://steelequivalents.com/nl/materialen/gost/lr3.md pl: https://steelequivalents.com/pl/materiały/gost/lr3.md pt: https://steelequivalents.com/pt/materiais/gost/lr3.md ru: https://steelequivalents.com/ru/материалы/gost/lr3.md tr: https://steelequivalents.com/tr/malzemeler/gost/lr3.md zh: https://steelequivalents.com/zh/材料/gost/lr3.md ja: https://steelequivalents.com/ja/材料/gost/lr3.md ar: https://steelequivalents.com/ar/المواد/gost/lr3.md ko: https://steelequivalents.com/ko/재료/gost/lr3.md pt-br: https://steelequivalents.com/pt-br/materiais/gost/lr3.md hi: https://steelequivalents.com/hi/सामग्री/gost/lr3.md content_hash: sha256:1887782de8fd5a635f2f7550c9e452a7baec9632feaba65d349794ce99ca3444 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/gost/lr3 > Canonical URL: https://steelequivalents.com/materials/gost/lr3 > 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 · 66 designations # LR3 LR3 is a designation in GOST for the material held under material number 1.0116, also listed as St 37-3 N. It is a material in the category Unalloyed structural steels. We list 66 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, JIS, GOST, SS, ČSN, PN and SANS. - [*Material no.* **1.0116**](/materials/material-no/1.0116 "Material no.: 1.0116") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **66** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=5c9e9b14-6c57-4ff5-8220-f195f245c304&designation=b372e931-7399-49f4-8bd7-a0927ab0a27d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/lr3.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN S235J2G3 This grade’s own name](/materials/din-en/s235j2g3 "DIN / EN S235J2G3") - [UNS K01702 This grade’s own name · 2 grades on that route](/materials/uns/k01702 "UNS K01702") ## 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 66 designations · 13 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 · 2 - [S235J2G3 This grade’s own name](/materials/din-en/s235j2g3 "DIN / EN S235J2G3") - [St 37-3 N This grade’s own name](/materials/din-en/st-37-3-n "DIN / EN St 37-3 N") UNS United States · 4 - [K01702 This grade’s own name](/materials/uns/k01702 "UNS K01702") - [K02001 This grade’s own name](/materials/uns/k02001 "UNS K02001") - [K02601 This grade’s own name](/materials/uns/k02601 "UNS K02601") - [K02701 Indicative](/materials/uns/k02701 "UNS K02701") AISI / SAE United States · 4 - [A284 Indicative](/materials/aisi-sae/a284 "AISI / SAE A284") - [A573 Indicative](/materials/aisi-sae/a573 "AISI / SAE A573") - [A611 Indicative](/materials/aisi-sae/a611 "AISI / SAE A611") - [C A611 Gr. C Indicative](/materials/aisi-sae/c-a611-gr-c "AISI / SAE C A611 Gr. C") ASTM United States · 3 - [A284 Indicative](/materials/aisi-sae/a284 "ASTM A284") - [A573 Indicative](/materials/aisi-sae/a573 "ASTM A573") - [A611 Indicative](/materials/aisi-sae/a611 "ASTM A611") BS United Kingdom · 4 - [4360-40C Indicative](/materials/bs/4360-40c "BS 4360-40C") - [D-1449-37C Indicative](/materials/bs/d-1449-37c "BS D-1449-37C") - [Gr 40D Indicative](/materials/bs/gr-40d "BS Gr 40D") - [HS 37 Indicative](/materials/bs/hs-37 "BS HS 37") AFNOR France · 3 - [E24-3 Indicative](/materials/afnor/e24-3 "AFNOR E24-3") - [E24-4 Indicative](/materials/afnor/e24-4 "AFNOR E24-4") - [S235J2G3 Indicative](/materials/din-en/s235j2g3 "AFNOR S235J2G3") UNE Spain · 2 - [A360 Indicative](/materials/une/a360 "UNE A360") - [A360 C Indicative](/materials/une/a360-c "UNE A360 C") JIS Japan · 1 - [SS34 Indicative](/materials/jis/ss34 "JIS SS34") GOST Russia / CIS · 39 - [08Kh14N5M2DL Indicative](/materials/gost/08kh14n5m2dl "GOST 08Kh14N5M2DL") - [08Х14Н5М2ДЛ Indicative](/materials/gost/08kh14n5m2dl "GOST 08Х14Н5М2ДЛ") - [0Kh18N5G12AB Indicative](/materials/gost/0kh18n5g12ab "GOST 0Kh18N5G12AB") - [0Kh20N4AG10 Indicative](/materials/gost/0kh20n4ag10 "GOST 0Kh20N4AG10") - [0Х18Н5Г12АБ Indicative](/materials/gost/0kh18n5g12ab "GOST 0Х18Н5Г12АБ") - [0Х20Н4АГ10 Indicative](/materials/gost/0kh20n4ag10 "GOST 0Х20Н4АГ10") - [34KhM Indicative](/materials/gost/34khm "GOST 34KhM") - [34ХМА Indicative](/materials/gost/34khma "GOST 34ХМА") - [A3 Indicative](/materials/din-en/a3 "GOST A3") - [CHKH3 Indicative](/materials/gost/chkh3 "GOST CHKH3") - [CHKH3T Indicative](/materials/gost/chkh3t "GOST CHKH3T") - [CHN3KHMDSH Indicative](/materials/gost/chn3khmdsh "GOST CHN3KHMDSH") - [L3 Indicative](/materials/aisi-sae/l3 "GOST L3") - **LR3 Indicative** - [PA-ZhGr3 Indicative](/materials/gost/pa-zhgr3 "GOST PA-ZhGr3") - [PA-ZhGr3M Indicative](/materials/gost/pa-zhgr3m "GOST PA-ZhGr3M") - [PA-ZhGr3TSs Indicative](/materials/gost/pa-zhgr3tss "GOST PA-ZhGr3TSs") - [PA-ZhNGr3M Indicative](/materials/gost/pa-zhngr3m "GOST PA-ZhNGr3M") - [PF3 Indicative](/materials/gost/pf3 "GOST PF3") - [PVK3 Indicative](/materials/gost/pvk3 "GOST PVK3") - [PZhR3 Indicative](/materials/gost/pzhr3 "GOST PZhR3") - [PZhV3 Indicative](/materials/gost/pzhv3 "GOST PZhV3") - [S245 Indicative](/materials/gost/s245 "GOST S245") - [VSt3Gps Indicative](/materials/gost/vst3gps "GOST VSt3Gps") - [VSt3kp Indicative](/materials/gost/vst3kp "GOST VSt3kp") - [VSt3ps Indicative](/materials/gost/vst3ps "GOST VSt3ps") - [VSt3sp Indicative](/materials/gost/vst3sp "GOST VSt3sp") - [АCHS-3 Indicative](/materials/gost/achs-3 "GOST АCHS-3") - [ВНЛ-3 Indicative](/materials/gost/vnl-3 "GOST ВНЛ-3") - [ЖГр3 Indicative](/materials/gost/zhgr3 "GOST ЖГр3") - [ЖГр3-20 Indicative](/materials/gost/zhgr3-20 "GOST ЖГр3-20") - [ЖГр3-5.5 Indicative](/materials/gost/zhgr3-5-5 "GOST ЖГр3-5.5") - [ЖГр3М15 Indicative](/materials/gost/zhgr3m15 "GOST ЖГр3М15") - [ЖГр3Цс4 Indicative](/materials/gost/zhgr3tss4 "GOST ЖГр3Цс4") - [ЖГрЦс4У Indicative](/materials/gost/zhgrtss4u "GOST ЖГрЦс4У") - [ЖНГр3М15 Indicative](/materials/gost/zhngr3m15 "GOST ЖНГр3М15") - [НН3 Indicative](/materials/gost/nn3 "GOST НН3") - [НН3Б Indicative](/materials/gost/nn3b "GOST НН3Б") - [Ст3сп Indicative](/materials/gost/st3sp "GOST Ст3сп") SS Sweden · 1 - [1313 Indicative](/materials/gost/1313 "SS 1313") ČSN Czechia · 1 - [11378 Indicative](/materials/csn/11378 "ČSN 11378") PN Poland · 1 - [St3W Indicative](/materials/pn/st3w "PN St3W") SANS South Africa · 1 - [240 WDD Indicative](/materials/sans/240-wdd "SANS 240 WDD") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 4 elements on file · weight % What this alloy is Fe Mn C P Iron — the balance, never listed by a standard — 98.4 % Mn — 1.4 % C — 0.2 % P — 0 % Traces & impurities · 0 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.17 | | Mn | ≤ 1.4 | | P | 0.035 | | S | 0.035 | Carbon Manganese Phosphorus Sulfur 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 | ≤0,17 | — | 0.170 | Max | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | Exact | | Mn | ≤1,40 | — | 1.400 | Max | 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 850 °C Exact · Ac3(Acm) Transformation point Ar3 835 °C Exact · Ar3(Arcm) Transformation point Ar1 680 °C Exact Weldability readily weldable As published: without limitations. 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 4 conditions · 35 values By thickness**Flat and long products** source `steelnumber` | Thickness mm | ReH N/mm² | Rm N/mm² | |---|---|---| | ≤ 3 | — | 360 – 510 | | 3 – 100 | — | 360 – 510 | | ≤ 16 | 235 | — | | 16 – 40 | 225 | — | | 40 – 63 | 215 | — | | 63 – 80 | 215 | — | | 80 – 100 | 215 | — | | 100 – 150 | 195 | 350 – 500 | | 150 – 250 | — | 340 – 490 | | 150 – 200 | 185 | — | | 200 – 250 | 175 | — | | 250 – 400 | — | 330 – 480 | By thickness**no delivery state stated** source `steelnumber` | Thickness mm | A80% · Lo = 80 mm | A% · Lo = 5,65 √So | |---|---|---| | ≤ 1 | 17 | — | | 1 – 1.5 | 18 | — | | 1.5 – 2 | 19 | — | | 2 – 2.5 | 20 | — | | 2.5 – 3 | 21 | — | | 3 – 40 | — | 26 | | 40 – 63 | — | 25 | | 63 – 100 | — | 24 | | 100 – 150 | — | 22 | | 150 – 250 | — | 21 | By dimension**no delivery state stated** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | |---|---|---|---| | to 20 | 360 – 460 | 235 | 27 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Elastic modulus GPa | |---|---|---| | 20 | 7.85 | 213 | | 100 | — | 208 | | 200 | — | 202 | | 300 | — | 195 | | 400 | — | 187 | | 500 | — | 176 | | 600 | — | 167 | | 700 | — | 153 | 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=5c9e9b14-6c57-4ff5-8220-f195f245c304&designation=b372e931-7399-49f4-8bd7-a0927ab0a27d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/gost/lr3.pdf "Datasheet as PDF")