--- title: "St 37-3 U — Unalloyed structural steels" description: "St 37-3 U: 30 equivalent designations across 22 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/st-37-3-u language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/st-37-3-u.md cs: https://steelequivalents.com/cs/materiály/din-en/st-37-3-u.md de: https://steelequivalents.com/de/werkstoffe/din-en/st-37-3-u.md es: https://steelequivalents.com/es/materiales/din-en/st-37-3-u.md fr: https://steelequivalents.com/fr/matériaux/din-en/st-37-3-u.md hu: https://steelequivalents.com/hu/anyagok/din-en/st-37-3-u.md it: https://steelequivalents.com/it/materiali/din-en/st-37-3-u.md nl: https://steelequivalents.com/nl/materialen/din-en/st-37-3-u.md pl: https://steelequivalents.com/pl/materiały/din-en/st-37-3-u.md pt: https://steelequivalents.com/pt/materiais/din-en/st-37-3-u.md ru: https://steelequivalents.com/ru/материалы/din-en/st-37-3-u.md tr: https://steelequivalents.com/tr/malzemeler/din-en/st-37-3-u.md zh: https://steelequivalents.com/zh/材料/din-en/st-37-3-u.md ja: https://steelequivalents.com/ja/材料/din-en/st-37-3-u.md ar: https://steelequivalents.com/ar/المواد/din-en/st-37-3-u.md ko: https://steelequivalents.com/ko/재료/din-en/st-37-3-u.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/st-37-3-u.md hi: https://steelequivalents.com/hi/सामग्री/din-en/st-37-3-u.md content_hash: sha256:bed79ff0a1468c6ae4307051e930cc78e72a050c1cf5f1919669df81cd5c81f9 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/din-en/st-37-3-u > Canonical URL: https://steelequivalents.com/materials/din-en/st-37-3-u > 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. DIN / EN · Europe · 30 designations # St 37-3 U S235J0 is a material in the category [Unalloyed structural steels](/categories/unalloyed-structural-steels "Unalloyed structural steels"), held under material number 1.0114. We list 29 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, NS, GB, NP, GOST, UNI, SS, ČSN, PN, ABNT NBR, STN, MSZ, SANS, ÖNORM and NBN. Its recorded composition includes C ≤ 0.17%, P 0.03%, S 0.03%, Mn ≤ 1.4% and Cu ≤ 0.55%. Recorded mechanical properties include Rm 340–540 N/mm², Re 205–255 N/mm², A 21–26%, HB 131 and Z 60%; these figures vary with the delivery condition and dimension. Its recorded density is 7.85 g/cm³. Its weldability is recorded as good. - [*Material no.* **1.0114**](/materials/material-no/1.0114 "Material no.: 1.0114") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **30** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=dbf64fdb-d271-4875-859b-3bbb82b4df0a&designation=bf37ad95-7f92-4dc7-9e7a-8404ded47afd "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/st-37-3-u.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN S235J0 This grade’s own name](/materials/din-en/s235j0 "DIN / EN S235J0") - [UNS K02401 This grade’s own name · 6 grades on that route](/materials/uns/k02401 "UNS K02401") ## 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 30 designations · 22 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. Superseded by the current name this withdrawn designation was replaced by — the same grade under its present designation, the one to order by today. DIN / EN Europe · 4 - [A284D Indicative](/materials/din-en/a284d "DIN / EN A284D") - [Fe360C Indicative](/materials/iso/fe360c "DIN / EN Fe360C") - [S235J0 This grade’s own name](/materials/din-en/s235j0 "DIN / EN S235J0")Formerly St 37-3 U - **St 37-3 U This grade’s own name Withdrawn**Superseded by[S235J0](/materials/din-en/s235j0 "S235J0") UNS United States · 1 - [K02401 This grade’s own name](/materials/uns/k02401 "UNS K02401") AISI / SAE United States · 2 - [A284C Indicative](/materials/aisi-sae/a284c "AISI / SAE A284C") - [A284D Indicative](/materials/din-en/a284d "AISI / SAE A284D") BS United Kingdom · 2 - [40C Indicative](/materials/bs/40c "BS 40C") - [Gr 40C Indicative](/materials/bs/gr-40c "BS Gr 40C") AFNOR France · 1 - [E24-3 Indicative](/materials/afnor/e24-3 "AFNOR E24-3") UNE Spain · 1 - [AE235C Indicative](/materials/une/ae235c "UNE AE235C") ISO International · 1 - [E235C Indicative](/materials/iso/e235c "ISO E235C") NS Norway · 1 - [NS12124 Indicative](/materials/ns/ns12124 "NS NS12124") JIS Japan · 1 - [SM400B Indicative](/materials/ks/sm400b "JIS SM400B") NP Portugal · 1 - [FE360-C Indicative](/materials/iso/fe360c "NP FE360-C") GB China · 1 - [Q235C Indicative](/materials/gb/q235c "GB Q235C") GOST Russia / CIS · 2 - [St3ps Indicative](/materials/gost/st3ps "GOST St3ps") - [St3sp Indicative](/materials/gost/st3sp "GOST St3sp") UNI Italy · 1 - [Fe360C Indicative](/materials/iso/fe360c "UNI Fe360C") SS Sweden · 1 - [1312 Indicative](/materials/gost/1312 "SS 1312") ČSN Czechia · 1 - [11378 Indicative](/materials/csn/11378 "ČSN 11378") STN Slovakia · 1 - [11 378 Indicative](/materials/csn/11378 "STN 11 378") ABNT NBR Brazil · 2 - [NBR 5008 CGR400 Indicative](/materials/abnt/nbr-5008-cgr400 "ABNT NBR NBR 5008 CGR400") - [NBR 5921 CFR400 Indicative](/materials/abnt/nbr-5921-cfr400 "ABNT NBR NBR 5921 CFR400") PN Poland · 1 - [St3W Indicative](/materials/pn/st3w "PN St3W") MSZ Hungary · 2 - [37 C Indicative](/materials/msz/37-c "MSZ 37 C") - [Fe 235 C Indicative](/materials/msz/fe-235-c "MSZ Fe 235 C") SANS South Africa · 1 - [240 WC Indicative](/materials/sans/240-wc "SANS 240 WC") ÖNORM Austria · 1 - [St360C Indicative](/materials/onorm/st360c "ÖNORM St360C") NBN Belgium · 1 - [AE235C Indicative](/materials/une/ae235c "NBN AE235C") 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 Cu C Iron — the balance, never listed by a standard — 97.8 % Mn — 1.4 % Cu — 0.6 % C — 0.2 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.17 | | Mn | ≤ 1.4 | | P | 0.03 | | S | 0.03 | | Cu | ≤ 0.55 | | N | 0.012 | Carbon Manganese Phosphorus Sulfur Copper 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 | ≤0,17 | — | 0.170 | Max | | N | 0,012 | 0.012 | 0.012 | Exact | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Mn | ≤1,40 | — | 1.400 | Max | | Cu | ≤0,55 | — | 0.550 | 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 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 · 40 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 | — | 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 delivery state**no delivery state stated** source `splav` | Delivery state | Rm N/mm² | Re N/mm² | A5% | Z% | |---|---|---|---|---| | Pipe, GOST 8696-74 | 372 | 245 | 23 | — | | Pipe, GOST 10705-80 | 372 | 225 | 22 | — | | Rolled stock, GOST 535-2005 | 370 – 490 | 205 – 255 | 23 – 26 | — | | Sheet trick, GOST 14637-89 | 370 – 480 | 205 – 245 | 23 – 26 | — | | Rebar, GOST 5781-82 | 373 | 235 | 25 | — | | Wire rods , GOST 30136-95 | 490 – 540 | — | — | 60 | 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. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.0, a shared category, and a published range for Mn / Cu that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade. [1.0038 1.0038 Mn ≤1,40 · Cu ≤0,55 - ΔMn 0.00 - ΔCu 0.00 - 152 designations](/materials/material-no/1.0038 "1.0038")[Fe360D2 1.0117 Mn ≤1,40 · Cu ≤0,55 - ΔMn 0.00 - ΔCu 0.00 - 8 designations](/materials/din-en/fe360d2 "Fe360D2")[RQSt 37-2 1.0122 Mn ≤1,40 · Cu ≤0,55 - ΔMn 0.00 - ΔCu 0.00 - 3 designations](/materials/din-en/rqst-37-2 "RQSt 37-2")[S235JRG2CuC 1.0170 Mn ≤1,40 · Cu 0,25-0,35 - ΔMn 0.00 - ΔCu 0.02 - 1 designations](/materials/din-en/s235jrg2cuc "S235JRG2CuC")[S235J0Cu 1.0162 Mn ≤1,40 · Cu 0,25-0,40 - ΔMn 0.00 - ΔCu 0.05 - 1 designations](/materials/din-en/s235j0cu "S235J0Cu")[S235J2G4Cu 1.0163 Mn ≤1,40 · Cu 0,25-0,40 - ΔMn 0.00 - ΔCu 0.05 - 1 designations](/materials/din-en/s235j2g4cu "S235J2G4Cu") ## 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=dbf64fdb-d271-4875-859b-3bbb82b4df0a&designation=bf37ad95-7f92-4dc7-9e7a-8404ded47afd "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/st-37-3-u.pdf "Datasheet as PDF")