--- title: "40D — Unalloyed structural steels" description: "40D in BS: material number 1.0038, also listed as RSt 37-2. Category: Unalloyed structural steels. Designations recorded for this grade: 152." canonical: https://steelequivalents.com/materials/bs/40d language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/bs/40d.md cs: https://steelequivalents.com/cs/materiály/bs/40d.md de: https://steelequivalents.com/de/werkstoffe/bs/40d.md es: https://steelequivalents.com/es/materiales/bs/40d.md fr: https://steelequivalents.com/fr/matériaux/bs/40d.md hu: https://steelequivalents.com/hu/anyagok/bs/40d.md it: https://steelequivalents.com/it/materiali/bs/40d.md nl: https://steelequivalents.com/nl/materialen/bs/40d.md pl: https://steelequivalents.com/pl/materiały/bs/40d.md pt: https://steelequivalents.com/pt/materiais/bs/40d.md ru: https://steelequivalents.com/ru/материалы/bs/40d.md tr: https://steelequivalents.com/tr/malzemeler/bs/40d.md zh: https://steelequivalents.com/zh/材料/bs/40d.md ja: https://steelequivalents.com/ja/材料/bs/40d.md ar: https://steelequivalents.com/ar/المواد/bs/40d.md ko: https://steelequivalents.com/ko/재료/bs/40d.md pt-br: https://steelequivalents.com/pt-br/materiais/bs/40d.md hi: https://steelequivalents.com/hi/सामग्री/bs/40d.md content_hash: sha256:ffaab1a18a29ea67314692fb5e70987d92bf2b6ab0dfe0c9a89d8dc828cf3298 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/bs/40d > Canonical URL: https://steelequivalents.com/materials/bs/40d > 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. BS · United Kingdom · 152 designations # 40D 40D is a designation in BS for the material held under material number 1.0038, also listed as RSt 37-2. It is a material in the category Unalloyed structural steels. We list 152 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, STN, SRPS, HRN, ABNT NBR, PN, MSZ, STAS, SANS, BDS, ÖNORM, NBN, SFS and CSA. - [*Material no.* **1.0038**](/materials/material-no/1.0038 "Material no.: 1.0038") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **152** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=c80c09ae-8ed9-4749-96b9-abce235175e8&designation=f8671f10-e977-4172-80d2-4ef542df1f02 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/bs/40d.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN S235JR This grade’s own name · 4 grades on that route](/materials/din-en/s235jr "DIN / EN S235JR") - [UNS K01500 This grade’s own name](/materials/uns/k01500 "UNS K01500") - [GB 40B This grade’s own name · 2 grades on that route](/materials/gb/40b "GB 40B") ## 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 152 designations · 27 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 · 5 - [1.0038 Indicative](/materials/material-no/1.0038 "DIN / EN 1.0038") - [Fe360BFN Indicative](/materials/uni/fe360bfn "DIN / EN Fe360BFN") - [RSt 37-2 This grade’s own name Withdrawn](/materials/din-en/rst-37-2 "DIN / EN RSt 37-2")Superseded by[S235JRG2](/materials/din-en/s235jrg2 "S235JRG2") - [S235JR This grade’s own name](/materials/din-en/s235jr "DIN / EN S235JR") - [S235JRG2 This grade’s own name](/materials/din-en/s235jrg2 "DIN / EN S235JRG2")Formerly RSt 37-2 UNS United States · 5 - [K01500 This grade’s own name](/materials/uns/k01500 "UNS K01500") - [K01702 This grade’s own name](/materials/uns/k01702 "UNS K01702") - [K02401 This grade’s own name](/materials/uns/k02401 "UNS K02401") - [K02502 This grade’s own name](/materials/uns/k02502 "UNS K02502") - [K03000 This grade’s own name](/materials/uns/k03000 "UNS K03000") AISI / SAE United States · 16 - [A284Gr.D Indicative](/materials/aisi-sae/a284gr-d "AISI / SAE A284Gr.D") - [A570 Indicative](/materials/aisi-sae/a570 "AISI / SAE A570") - [A570 Gr. 36 Indicative](/materials/aisi-sae/a570gr-36 "AISI / SAE A570 Gr. 36") - [A570.36 Indicative](/materials/aisi-sae/a570-36 "AISI / SAE A570.36") - [A573Gr.58 Indicative](/materials/aisi-sae/a573gr-58 "AISI / SAE A573Gr.58") - [A611Gr.C Indicative](/materials/aisi-sae/a611gr-c "AISI / SAE A611Gr.C") - [Gr.36 Indicative](/materials/aisi-sae/gr-36 "AISI / SAE Gr.36") - [GradeC Indicative](/materials/din-en/gradec "AISI / SAE GradeC") - [K01804 Indicative](/materials/uns/k01804 "AISI / SAE K01804") - [K02001 Indicative](/materials/uns/k02001 "AISI / SAE K02001") - [K02301 Indicative](/materials/uns/k02301 "AISI / SAE K02301") - [K02502 Indicative](/materials/uns/k02502 "AISI / SAE K02502") - [K02601 Indicative](/materials/uns/k02601 "AISI / SAE K02601") - [K02701 Indicative](/materials/uns/k02701 "AISI / SAE K02701") - [K02702 Indicative](/materials/uns/k02702 "AISI / SAE K02702") - [M1017 Indicative](/materials/aisi-sae/m1017 "AISI / SAE M1017") ASTM United States · 2 - [A283GRC Indicative](/materials/aisi-sae/a283grc "ASTM A283GRC") - [A570 Indicative](/materials/aisi-sae/a570 "ASTM A570") BS United Kingdom · 22 - [050A17 Indicative](/materials/bs/050a17 "BS 050A17") - [1449-27/23CR Indicative](/materials/bs/1449-27-23cr "BS 1449-27/23CR") - [1449-37/23CR Indicative](/materials/bs/1449-37-23cr "BS 1449-37/23CR") - [37/23HR Indicative](/materials/bs/37-23hr "BS 37/23HR") - [40B Indicative](/materials/gb/40b "BS 40B") - [40C Indicative](/materials/bs/40c "BS 40C") - **40D Indicative** - [4360 40 C Indicative](/materials/bs/4360-40c "BS 4360 40 C") - [4360-40B Indicative](/materials/bs/4360-40b "BS 4360-40B") - [4360-40D Indicative](/materials/bs/4360-40d "BS 4360-40D") - [4449-250 Indicative](/materials/bs/4449-250 "BS 4449-250") - [722M24 Indicative](/materials/bs/722m24 "BS 722M24") - [Fe360BFU Indicative](/materials/bs/fe360bfu "BS Fe360BFU") - [Fe360D1FF Indicative](/materials/bs/fe360d1ff "BS Fe360D1FF") - [Gr 40A Indicative](/materials/bs/gr-40a "BS Gr 40A") - [HFS3 Indicative](/materials/bs/hfs3 "BS HFS3") - [HFS4 Indicative](/materials/bs/hfs4 "BS HFS4") - [HFW3 Indicative](/materials/bs/hfw3 "BS HFW3") - [HFW4 Indicative](/materials/bs/hfw4 "BS HFW4") - [S235J2G3 Indicative](/materials/din-en/s235j2g3 "BS S235J2G3") - [S235JR Indicative](/materials/din-en/s235jr "BS S235JR") - [S235JRG2 Indicative](/materials/din-en/s235jrg2 "BS S235JRG2") AFNOR France · 9 - [A37-2 Indicative](/materials/afnor/a37-2 "AFNOR A37-2") - [E 24-2 Ne – Indicative](/materials/afnor/e-24-2-ne "AFNOR E 24-2 Ne –") - [E24-2 Indicative](/materials/afnor/e24-2 "AFNOR E24-2") - [E24-3 Indicative](/materials/afnor/e24-3 "AFNOR E24-3") - [E24-4 Indicative](/materials/afnor/e24-4 "AFNOR E24-4") - [S235J0 Indicative](/materials/din-en/s235j0 "AFNOR S235J0") - [S235J2G3 Indicative](/materials/din-en/s235j2g3 "AFNOR S235J2G3") - [S235J2G4 Indicative](/materials/din-en/s235j2g4 "AFNOR S235J2G4") - [S235JRG2 Indicative](/materials/din-en/s235jrg2 "AFNOR S235JRG2") UNE Spain · 8 - [AE235B-FN Indicative](/materials/une/ae235b-fn "UNE AE235B-FN") - [AE235BFU Indicative](/materials/une/ae235b-fu "UNE AE235BFU") - [AE235D Indicative](/materials/une/ae235d "UNE AE235D") - [Fe360BFN Indicative](/materials/uni/fe360bfn "UNE Fe360BFN") - [Fe360BFU Indicative](/materials/bs/fe360bfu "UNE Fe360BFU") - [Fe360D1FF Indicative](/materials/bs/fe360d1ff "UNE Fe360D1FF") - [S235J2G3 Indicative](/materials/din-en/s235j2g3 "UNE S235J2G3") - [S235JRG2 Indicative](/materials/din-en/s235jrg2 "UNE S235JRG2") ISO International · 4 - [E235-B Indicative](/materials/iso/e235-b "ISO E235-B") - [E235-C Indicative](/materials/iso/e235c "ISO E235-C") - [Fe360-C Indicative](/materials/iso/fe360c "ISO Fe360-C") - [Fe360B Indicative](/materials/une/fe360b "ISO Fe360B") JIS Japan · 7 - [SAPH38 Indicative](/materials/jis/saph38 "JIS SAPH38") - [SS330 Indicative](/materials/ks/ss330 "JIS SS330") - [SS34 Indicative](/materials/jis/ss34 "JIS SS34") - [SS400 Indicative](/materials/jis/ss400 "JIS SS400") - [STKM 12A Indicative](/materials/jis/stkm12a "JIS STKM 12A") - [STKM 12A STKM 12C Indicative](/materials/jis/stkm-12a-stkm-12c "JIS STKM 12A STKM 12C") - [STKM 12C Indicative](/materials/jis/stkm12c "JIS STKM 12C") GB China · 10 - [15 Indicative](/materials/gb/15 "GB 15") - [40B This grade’s own name](/materials/gb/40b "GB 40B") - [A3 Indicative](/materials/din-en/a3 "GB A3") - [Q235 Indicative](/materials/gb/q235 "GB Q235") - [Q235-A Indicative](/materials/gb/q235-a "GB Q235-A") - [Q235A-B Indicative](/materials/gb/q235a-b "GB Q235A-B") - [Q235A-Z Indicative](/materials/gb/q235a-z "GB Q235A-Z") - [Q235B Indicative](/materials/gb/q235b "GB Q235B") - [Q235B-Z Indicative](/materials/gb/q235b-z "GB Q235B-Z") - [Q235C Indicative](/materials/gb/q235c "GB Q235C") GOST Russia / CIS · 5 - [S245 Indicative](/materials/gost/s245 "GOST S245") - [St3ps Indicative](/materials/gost/st3ps "GOST St3ps") - [St3sp Indicative](/materials/gost/st3sp "GOST St3sp") - [С245 Indicative](/materials/gost/s245 "GOST С245") - [Ст3сп Indicative](/materials/gost/st3sp "GOST Ст3сп") UNI Italy · 11 - [FE360B Indicative](/materials/une/fe360b "UNI FE360B") - [Fe360BFN Indicative](/materials/uni/fe360bfn "UNI Fe360BFN") - [Fe360C Indicative](/materials/iso/fe360c "UNI Fe360C") - [Fe360CFN Indicative](/materials/uni/fe360cfn "UNI Fe360CFN") - [Fe360D Indicative](/materials/uni/fe360d "UNI Fe360D") - [Fe360DFF Indicative](/materials/uni/fe360dff "UNI Fe360DFF") - [Fe37-2 Indicative](/materials/uni/fe37-2 "UNI Fe37-2") - [S235J0 Indicative](/materials/din-en/s235j0 "UNI S235J0") - [S235J2G3 Indicative](/materials/din-en/s235j2g3 "UNI S235J2G3") - [S235J2G4 Indicative](/materials/din-en/s235j2g4 "UNI S235J2G4") - [S235JRG2 Indicative](/materials/din-en/s235jrg2 "UNI S235JRG2") SS Sweden · 4 - [1311 Indicative](/materials/gost/1311 "SS 1311") - [1312 Indicative](/materials/gost/1312 "SS 1312") - [1312-00 Indicative](/materials/ss/1312-00 "SS 1312-00") - [1313 Indicative](/materials/gost/1313 "SS 1313") ČSN Czechia · 4 - [11342 Indicative](/materials/csn/11342 "ČSN 11342") - [11373 Indicative](/materials/csn/11373 "ČSN 11373") - [11375 Indicative](/materials/csn/11375 "ČSN 11375") - [11378 Indicative](/materials/csn/11378 "ČSN 11378") STN Slovakia · 1 - [11 375 Indicative](/materials/csn/11375 "STN 11 375") SRPS Serbia · 1 - [Č.0361 Indicative](/materials/srps/c-0361 "SRPS Č.0361") HRN Croatia · 1 - [Č0361 Indicative](/materials/srps/c-0361 "HRN Č0361") ABNT NBR Brazil · 3 - [NBR 6648 CG26 Indicative](/materials/abnt/nbr-6648-cg26 "ABNT NBR NBR 6648 CG26") - [NBR 6650 CF26 Indicative](/materials/abnt/nbr-6650-cf26 "ABNT NBR NBR 6650 CF26") - [NBR 7007 MR250 Indicative](/materials/abnt/nbr-7007-mr250 "ABNT NBR NBR 7007 MR250") PN Poland · 7 - [St3S Indicative](/materials/pn/st3s "PN St3S") - [St3SX Indicative](/materials/pn/st3sx "PN St3SX") - [St3SY Indicative](/materials/pn/st3sy "PN St3SY") - [St3V Indicative](/materials/pn/st3v "PN St3V") - [St3V St3VY Indicative](/materials/pn/st3v-st3vy "PN St3V St3VY") - [St3VY Indicative](/materials/pn/st3vy "PN St3VY") - [St3W Indicative](/materials/pn/st3w "PN St3W") MSZ Hungary · 7 - [37 B Indicative](/materials/msz/37-b "MSZ 37 B") - [A 38 B Indicative](/materials/msz/a-38-b "MSZ A 38 B") - [Fe 235 B Indicative](/materials/msz/fe-235-b "MSZ Fe 235 B") - [Fe235B/FN Indicative](/materials/msz/fe235b-fn "MSZ Fe235B/FN") - [Fe235D Indicative](/materials/msz/fe235d "MSZ Fe235D") - [S235J2G3 Indicative](/materials/din-en/s235j2g3 "MSZ S235J2G3") - [S235JRG2 Indicative](/materials/din-en/s235jrg2 "MSZ S235JRG2") STAS Romania · 3 - [OL37.1 Indicative](/materials/stas/ol37-1 "STAS OL37.1") - [OL37.2 Indicative](/materials/stas/ol37-2 "STAS OL37.2") - [OL37.4 Indicative](/materials/stas/ol37-4 "STAS OL37.4") SANS South Africa · 1 - [240 WA Indicative](/materials/sans/240-wa "SANS 240 WA") BDS Bulgaria · 7 - [BSt3ps Indicative](/materials/bds/bst3ps "BDS BSt3ps") - [BSt3sp Indicative](/materials/bds/bst3sp "BDS BSt3sp") - [Ew-08AA Indicative](/materials/bds/ew-08aa "BDS Ew-08AA") - [S235J2G3 Indicative](/materials/din-en/s235j2g3 "BDS S235J2G3") - [S235JRG2 Indicative](/materials/din-en/s235jrg2 "BDS S235JRG2") - [WSt3ps Indicative](/materials/bds/wst3ps "BDS WSt3ps") - [WSt3sp Indicative](/materials/bds/wst3sp "BDS WSt3sp") ÖNORM Austria · 1 - [RSt360B Indicative](/materials/onorm/rst360b "ÖNORM RSt360B") NBN Belgium · 3 - [FE360BFN Indicative](/materials/uni/fe360bfn "NBN FE360BFN") - [FE360BFU Indicative](/materials/bs/fe360bfu "NBN FE360BFU") - [FED1FF Indicative](/materials/nbn/fed1ff "NBN FED1FF") SFS Finland · 4 - [Fe37B Indicative](/materials/sfs/fe37b "SFS Fe37B") - [FORM300H Indicative](/materials/sfs/form300h "SFS FORM300H") - [RACOLD03F Indicative](/materials/sfs/racold03f "SFS RACOLD03F") - [RACOLD215S Indicative](/materials/sfs/racold215s "SFS RACOLD215S") CSA Canada · 1 - [230G Indicative](/materials/csa/230g "CSA 230G") 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 | 0.035 | | S | 0.035 | | 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 | 0,035 | 0.035 | 0.035 | Exact | | S | 0,035 | 0.035 | 0.035 | 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. 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 · 12 values By thickness**Normalized** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | ≤ 100 | 340 | 24 | | 100 – 250 | 340 | 23 | | 250 – 500 | 340 | 23 | By dimension**no delivery state stated** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | |---|---|---|---| | 2 - 3.9 | 370 | 245 | 20 | | 4 - 10 | 370 | 245 | 25 | 2 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition. 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. [A284D 1.0114 Mn ≤1,40 · Cu ≤0,55 - ΔMn 0.00 - ΔCu 0.00 - 30 designations](/materials/din-en/a284d "A284D")[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=c80c09ae-8ed9-4749-96b9-abce235175e8&designation=f8671f10-e977-4172-80d2-4ef542df1f02 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/bs/40d.pdf "Datasheet as PDF")