--- title: "A570(40) — Unalloyed structural steels" description: "A570(40) in AISI / SAE: material number 1.0044, also listed as St 44-2. Category: Unalloyed structural steels. Designations recorded for this grade: 130." canonical: https://steelequivalents.com/materials/aisi-sae/a570-40 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/aisi-sae/a570-40.md cs: https://steelequivalents.com/cs/materiály/aisi-sae/a570-40.md de: https://steelequivalents.com/de/werkstoffe/aisi-sae/a570-40.md es: https://steelequivalents.com/es/materiales/aisi-sae/a570-40.md fr: https://steelequivalents.com/fr/matériaux/aisi-sae/a570-40.md hu: https://steelequivalents.com/hu/anyagok/aisi-sae/a570-40.md it: https://steelequivalents.com/it/materiali/aisi-sae/a570-40.md nl: https://steelequivalents.com/nl/materialen/aisi-sae/a570-40.md pl: https://steelequivalents.com/pl/materiały/aisi-sae/a570-40.md pt: https://steelequivalents.com/pt/materiais/aisi-sae/a570-40.md ru: https://steelequivalents.com/ru/материалы/aisi-sae/a570-40.md tr: https://steelequivalents.com/tr/malzemeler/aisi-sae/a570-40.md zh: https://steelequivalents.com/zh/材料/aisi-sae/a570-40.md ja: https://steelequivalents.com/ja/材料/aisi-sae/a570-40.md ar: https://steelequivalents.com/ar/المواد/aisi-sae/a570-40.md ko: https://steelequivalents.com/ko/재료/aisi-sae/a570-40.md pt-br: https://steelequivalents.com/pt-br/materiais/aisi-sae/a570-40.md hi: https://steelequivalents.com/hi/सामग्री/aisi-sae/a570-40.md content_hash: sha256:ce78d4f29d6a6ef2b755523a6b308e34bc1f37f75268dd85c2f8f62789e8de58 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/aisi-sae/a570-40 > Canonical URL: https://steelequivalents.com/materials/aisi-sae/a570-40 > 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. AISI / SAE · United States · 130 designations # A570(40) A570(40) is a designation in AISI / SAE for the material held under material number 1.0044, also listed as St 44-2. It is a material in the category Unalloyed structural steels. We list 130 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, ISO, NS, JIS, NP, GB, GOST, UNI, SS, ČSN, STN, PN, MSZ, STAS, SANS, BDS, ÖNORM, NBN, SFS, CSA and KS. - [*Material no.* **1.0044**](/materials/material-no/1.0044 "Material no.: 1.0044") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **130** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=cbf60671-dc7c-4949-86aa-8e996fb4051a&designation=a66d2387-9615-4de5-9744-92790778c4d0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/aisi-sae/a570-40.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN S275JR This grade’s own name](/materials/din-en/s275jr "DIN / EN S275JR") - [UNS G10200 This grade’s own name · 8 grades on that route](/materials/uns/g10200 "UNS G10200") - [AISI / SAE 1020 This grade’s own name · 11 grades on that route](/materials/aisi-sae/1020 "AISI / SAE 1020") ## 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 130 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 - [Fe430B Indicative](/materials/iso/fe430b "DIN / EN Fe430B") - [Gr.D Indicative](/materials/din-en/gr-d "DIN / EN Gr.D") - [RSt42-2 Indicative](/materials/din-en/rst42-2 "DIN / EN RSt42-2") - [S275JR This grade’s own name](/materials/din-en/s275jr "DIN / EN S275JR") - [St 44-2 This grade’s own name Withdrawn](/materials/din-en/st-44-2 "DIN / EN St 44-2")Superseded by[S275JRC](/materials/din-en/s275jrc "S275JRC") UNS United States · 10 - [G10200 This grade’s own name](/materials/uns/g10200 "UNS G10200") - [K 02598 This grade’s own name](/materials/uns/k02598 "UNS K 02598") - [K02301 This grade’s own name](/materials/uns/k02301 "UNS K02301") - [K02595 This grade’s own name](/materials/uns/k02595 "UNS K02595") - [K02596 This grade’s own name](/materials/uns/k02596 "UNS K02596") - [K02597 This grade’s own name](/materials/uns/k02597 "UNS K02597") - [K02598 This grade’s own name](/materials/uns/k02598 "UNS K02598") - [K02599 This grade’s own name](/materials/uns/k02599 "UNS K02599") - [K02702 This grade’s own name](/materials/uns/k02702 "UNS K02702") - [K03000 This grade’s own name](/materials/uns/k03000 "UNS K03000") AISI / SAE United States · 14 - [1020 This grade’s own name](/materials/aisi-sae/1020 "AISI / SAE 1020") - [A283D Indicative](/materials/aisi-sae/a283d "AISI / SAE A283D") - [A529 Indicative](/materials/astm/a529 "AISI / SAE A529") - [A570 Indicative](/materials/aisi-sae/a570 "AISI / SAE A570") - **A570(40) Indicative** - [A570Gr.40 Indicative](/materials/aisi-sae/a570gr-40 "AISI / SAE A570Gr.40") - [A573Gr.70 Indicative](/materials/aisi-sae/a573gr-70 "AISI / SAE A573Gr.70") - [A611Gr.D Indicative](/materials/aisi-sae/a611gr-d "AISI / SAE A611Gr.D") - [G10200 Indicative](/materials/uns/g10200 "AISI / SAE G10200") - [Gr.40 Indicative](/materials/aisi-sae/gr-40 "AISI / SAE Gr.40") - [Gr.D Indicative](/materials/din-en/gr-d "AISI / SAE Gr.D") - [GradeA Indicative](/materials/aisi-sae/gradea "AISI / SAE GradeA") - [GradeD Indicative](/materials/aisi-sae/graded "AISI / SAE GradeD") - [K02702 Indicative](/materials/uns/k02702 "AISI / SAE K02702") ASTM United States · 1 - [A570 Indicative](/materials/aisi-sae/a570 "ASTM A570") BS United Kingdom · 20 - [1449-43/25HR Indicative](/materials/bs/1449-43-25hr "BS 1449-43/25HR") - [161-430 Indicative](/materials/bs/161-430 "BS 161-430") - [4360-43B Indicative](/materials/bs/4360-43b "BS 4360-43B") - [4360-43C Indicative](/materials/bs/4360-43c "BS 4360-43C") - [43A Indicative](/materials/bs/43a "BS 43A") - [43B Indicative](/materials/bs/43b "BS 43B") - [43C Indicative](/materials/bs/43c "BS 43C") - [43D Indicative](/materials/bs/43d "BS 43D") - [CEW4 Indicative](/materials/bs/cew4 "BS CEW4") - [ERW4 Indicative](/materials/bs/erw4 "BS ERW4") - [Fe430BFN Indicative](/materials/uni/fe430bfn "BS Fe430BFN") - [Fe430D1FF Indicative](/materials/bs/fe430d1ff "BS Fe430D1FF") - [Gr 43B Indicative](/materials/bs/gr-43b "BS Gr 43B") - [HFS4 Indicative](/materials/bs/hfs4 "BS HFS4") - [HFW4 Indicative](/materials/bs/hfw4 "BS HFW4") - [HS Indicative](/materials/bs/hs "BS HS") - [S275J2G3 Indicative](/materials/bs/s275j2g3 "BS S275J2G3") - [S275JR Indicative](/materials/din-en/s275jr "BS S275JR") - [S275N Indicative](/materials/din-en/s275n "BS S275N") - [SAW4 Indicative](/materials/bs/saw4 "BS SAW4") AFNOR France · 4 - [E28-2 Indicative](/materials/afnor/e28-2 "AFNOR E28-2") - [E28-3 Indicative](/materials/afnor/e28-3 "AFNOR E28-3") - [E28-4 Indicative](/materials/afnor/e28-4 "AFNOR E28-4") - [S275JR Indicative](/materials/din-en/s275jr "AFNOR S275JR") UNE Spain · 7 - [A430B Indicative](/materials/une/a430b "UNE A430B") - [AE255B Indicative](/materials/une/ae255b "UNE AE255B") - [AE275B Indicative](/materials/une/ae275b "UNE AE275B") - [AE275D Indicative](/materials/une/ae275d "UNE AE275D") - [Fe430BFN Indicative](/materials/uni/fe430bfn "UNE Fe430BFN") - [Fe430D1FF Indicative](/materials/bs/fe430d1ff "UNE Fe430D1FF") - [S275JR Indicative](/materials/din-en/s275jr "UNE S275JR") ISO International · 6 - [E275-C Indicative](/materials/is/e275c "ISO E275-C") - [E275-D Indicative](/materials/iso/e275-d "ISO E275-D") - [E275B Indicative](/materials/iso/e275b "ISO E275B") - [Fe430-B Indicative](/materials/iso/fe430b "ISO Fe430-B") - [Fe430-C Indicative](/materials/iso/fe430c "ISO Fe430-C") - [Fe430-D Indicative](/materials/uni/fe430d "ISO Fe430-D") NS Norway · 1 - [NS12142 Indicative](/materials/ns/ns12142 "NS NS12142") JIS Japan · 14 - [SM400A Indicative](/materials/ks/sm400a "JIS SM400A") - [SM400B Indicative](/materials/ks/sm400b "JIS SM400B") - [SM400C Indicative](/materials/ks/sm400c "JIS SM400C") - [SM41A Indicative](/materials/jis/sm41a "JIS SM41A") - [SM520B Indicative](/materials/ks/sm520b "JIS SM520B") - [SN400B Indicative](/materials/jis/sn400b "JIS SN400B") - [SN400C Indicative](/materials/jis/sn400c "JIS SN400C") - [SN490B Indicative](/materials/jis/sn490b "JIS SN490B") - [SN490C Indicative](/materials/jis/sn490c "JIS SN490C") - [SS400 Indicative](/materials/jis/ss400 "JIS SS400") - [SS41 Indicative](/materials/jis/ss41 "JIS SS41") - [STK400 Indicative](/materials/jis/stk400 "JIS STK400") - [STKM19C Indicative](/materials/jis/stkm19c "JIS STKM19C") - [STKR400 Indicative](/materials/jis/stkr400 "JIS STKR400") NP Portugal · 1 - [FE430-B Indicative](/materials/iso/fe430b "NP FE430-B") GB China · 5 - [Q225 Indicative](/materials/gb/q225 "GB Q225") - [Q225A Indicative](/materials/gb/q225a "GB Q225A") - [Q255 Indicative](/materials/gb/q255 "GB Q255") - [Q255A Indicative](/materials/gb/q255a "GB Q255A") - [Q275Z Indicative](/materials/gb/q275z "GB Q275Z") GOST Russia / CIS · 3 - [St4ps Indicative](/materials/gost/st4ps "GOST St4ps") - [St4sp Indicative](/materials/gost/st4sp "GOST St4sp") - [Ст4пс Indicative](/materials/gost/st4ps "GOST Ст4пс") UNI Italy · 5 - [FE430B Indicative](/materials/iso/fe430b "UNI FE430B") - [Fe430BFN Indicative](/materials/uni/fe430bfn "UNI Fe430BFN") - [Fe430C(FN) Indicative](/materials/uni/fe430c-fn "UNI Fe430C(FN)") - [Fe430D(FF) Indicative](/materials/uni/fe430d-ff "UNI Fe430D(FF)") - [S275JR Indicative](/materials/din-en/s275jr "UNI S275JR") SS Sweden · 3 - [1411 Indicative](/materials/gost/1411 "SS 1411") - [1412 Indicative](/materials/gost/1412 "SS 1412") - [1414 Indicative](/materials/ss/1414 "SS 1414") ČSN Czechia · 3 - [11423 Indicative](/materials/csn/11423 "ČSN 11423") - [11425 Indicative](/materials/csn/11425 "ČSN 11425") - [11443 Indicative](/materials/csn/11443 "ČSN 11443") STN Slovakia · 1 - [11 443 Indicative](/materials/csn/11443 "STN 11 443") PN Poland · 4 - [St4S Indicative](/materials/pn/st4s "PN St4S") - [St4SY Indicative](/materials/pn/st4sy "PN St4SY") - [St4V Indicative](/materials/pn/st4v "PN St4V") - [St4VY Indicative](/materials/pn/st4vy "PN St4VY") MSZ Hungary · 5 - [45 B Indicative](/materials/gb/45b "MSZ 45 B") - [A 44 Indicative](/materials/msz/a-44 "MSZ A 44") - [Fe275B Indicative](/materials/msz/fe275b "MSZ Fe275B") - [FK Indicative](/materials/msz/fk "MSZ FK") - [S275JR Indicative](/materials/din-en/s275jr "MSZ S275JR") STAS Romania · 2 - [OL42.1 Indicative](/materials/stas/ol42-1 "STAS OL42.1") - [OL44.2 Indicative](/materials/stas/ol44-2 "STAS OL44.2") SANS South Africa · 1 - [300 WB Indicative](/materials/sans/300-wb "SANS 300 WB") BDS Bulgaria · 5 - [BSt4ps Indicative](/materials/bds/bst4ps "BDS BSt4ps") - [BSt4sp Indicative](/materials/bds/bst4sp "BDS BSt4sp") - [S275JR Indicative](/materials/din-en/s275jr "BDS S275JR") - [WSt4ps Indicative](/materials/bds/wst4ps "BDS WSt4ps") - [WSt4sp Indicative](/materials/bds/wst4sp "BDS WSt4sp") ÖNORM Austria · 2 - [St42F Indicative](/materials/onorm/st42f "ÖNORM St42F") - [St430B Indicative](/materials/onorm/st430b "ÖNORM St430B") NBN Belgium · 3 - [AE295B Indicative](/materials/nbn/ae295b "NBN AE295B") - [FE430BFN Indicative](/materials/uni/fe430bfn "NBN FE430BFN") - [FE430D1FF Indicative](/materials/bs/fe430d1ff "NBN FE430D1FF") SFS Finland · 1 - [Fe44B Indicative](/materials/sfs/fe44b "SFS Fe44B") CSA Canada · 3 - [260W Indicative](/materials/csa/260w "CSA 260W") - [260WT Indicative](/materials/csa/260wt "CSA 260WT") - [38W Indicative](/materials/csa/38w "CSA 38W") KS South Korea · 1 - [STKM19C Indicative](/materials/jis/stkm19c "KS STKM19C") 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 — 97.7 % Mn — 1.5 % 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 | ≤ 0.21 | | Mn | ≤ 1.5 | | 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 | ≤0,21 | — | 0.210 | 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 | ≤1,50 | — | 1.500 | 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 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 3 conditions · 24 values By thickness**Flat and long products** source `steelnumber` | Thickness mm | ReH N/mm² | Rm N/mm² | |---|---|---| | ≤ 3 | — | 430 – 580 | | 3 – 100 | — | 410 – 560 | | ≤ 16 | 275 | — | | 16 – 40 | 265 | — | | 40 – 63 | 255 | — | | 63 – 80 | 245 | — | | 80 – 100 | 235 | — | | 100 – 150 | 225 | 400 – 540 | | 150 – 250 | — | 380 – 540 | | 150 – 200 | 215 | — | | 200 – 250 | 205 | — | By thickness**no delivery state stated** source `steelnumber` | Thickness mm | A80% · Lo = 80 mm | A% · Lo = 5,65 √So | |---|---|---| | ≤ 1 | 15 | — | | 1 – 1.5 | 16 | — | | 1.5 – 2 | 17 | — | | 2 – 2.5 | 18 | — | | 2.5 – 3 | 19 | — | | 3 – 40 | — | 23 | | 40 – 63 | — | 22 | | 63 – 100 | — | 21 | | 100 – 150 | — | 19 | | 150 – 250 | — | 18 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Electrical resistivity nΩ·m | |---|---|---| | 20 | 7.65 | 500 | 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. [P265GH 1.0143 Mn ≤1,50 · Cu ≤0,55 - ΔMn 0.00 - ΔCu 0.00 - 25 designations](/materials/din-en/p265gh "P265GH")[Fe430D2 1.0145 Mn ≤1,50 · Cu ≤0,55 - ΔMn 0.00 - ΔCu 0.00 - 11 designations](/materials/din-en/fe430d2 "Fe430D2")[1.0038 1.0038 Mn ≤1,40 · Cu ≤0,55 - ΔMn 0.05 - ΔCu 0.00 - 152 designations](/materials/material-no/1.0038 "1.0038")[S355JR 1.0045 Mn ≤1,60 · Cu ≤0,55 - ΔMn 0.05 - ΔCu 0.00 - 32 designations](/materials/din-en/s355jr "S355JR")[A284D 1.0114 Mn ≤1,40 · Cu ≤0,55 - ΔMn 0.05 - ΔCu 0.00 - 30 designations](/materials/din-en/a284d "A284D")[Fe360D2 1.0117 Mn ≤1,40 · Cu ≤0,55 - ΔMn 0.05 - ΔCu 0.00 - 8 designations](/materials/din-en/fe360d2 "Fe360D2") ## 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=cbf60671-dc7c-4949-86aa-8e996fb4051a&designation=a66d2387-9615-4de5-9744-92790778c4d0 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/aisi-sae/a570-40.pdf "Datasheet as PDF")