--- title: "S 355 JO — Unalloyed structural steels" description: "S 355 JO in DIN / EN: material number 1.0553, also listed as St 52-3 U. Category: Unalloyed structural steels. Designations recorded for this grade: 30." canonical: https://steelequivalents.com/materials/din-en/s-355-jo language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/s-355-jo.md cs: https://steelequivalents.com/cs/materiály/din-en/s-355-jo.md de: https://steelequivalents.com/de/werkstoffe/din-en/s-355-jo.md es: https://steelequivalents.com/es/materiales/din-en/s-355-jo.md fr: https://steelequivalents.com/fr/matériaux/din-en/s-355-jo.md hu: https://steelequivalents.com/hu/anyagok/din-en/s-355-jo.md it: https://steelequivalents.com/it/materiali/din-en/s-355-jo.md nl: https://steelequivalents.com/nl/materialen/din-en/s-355-jo.md pl: https://steelequivalents.com/pl/materiały/din-en/s-355-jo.md pt: https://steelequivalents.com/pt/materiais/din-en/s-355-jo.md ru: https://steelequivalents.com/ru/материалы/din-en/s-355-jo.md tr: https://steelequivalents.com/tr/malzemeler/din-en/s-355-jo.md zh: https://steelequivalents.com/zh/材料/din-en/s-355-jo.md ja: https://steelequivalents.com/ja/材料/din-en/s-355-jo.md ar: https://steelequivalents.com/ar/المواد/din-en/s-355-jo.md ko: https://steelequivalents.com/ko/재료/din-en/s-355-jo.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/s-355-jo.md hi: https://steelequivalents.com/hi/सामग्री/din-en/s-355-jo.md content_hash: sha256:36b6d625f35535e55227d10eb9df3432e718d6ed8ce4e134444835d0cafc0a60 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/din-en/s-355-jo > Canonical URL: https://steelequivalents.com/materials/din-en/s-355-jo > 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 # S 355 JO S 355 JO is a designation in DIN / EN for the material held under material number 1.0553, also listed as St 52-3 U. It is a material in the category Unalloyed structural steels. We list 30 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, NS, JIS, GB, NP, UNI, SS, ČSN, STN, PN, SRPS, MSZ, ÖNORM, NBN and SFS. - [*Material no.* **1.0553**](/materials/material-no/1.0553 "Material no.: 1.0553") - [*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=d0e1a2ad-9edd-4372-a790-857430edbf59&designation=c8f866eb-b7e8-4f1c-b717-fe32237dd489 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/s-355-jo.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS K12000 This grade’s own name · 6 grades on that route](/materials/uns/k12000 "UNS K12000") ## 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 · 21 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 - [A633 Indicative](/materials/din-en/a633 "DIN / EN A633") - [Fe510C Indicative](/materials/uni/fe510c "DIN / EN Fe510C") - **S 355 JO This grade’s own name** - [S355J0 Indicative](/materials/uni/s355j0 "DIN / EN S355J0") - [St 52-3 U This grade’s own name Withdrawn](/materials/din-en/st-52-3-u "DIN / EN St 52-3 U")Superseded by[S355J0C](/materials/din-en/s355j0c "S355J0C") UNS United States · 1 - [K12000 This grade’s own name](/materials/uns/k12000 "UNS K12000") AISI / SAE United States · 2 - [A441 Indicative](/materials/aisi-sae/a441 "AISI / SAE A441") - [A633 Indicative](/materials/din-en/a633 "AISI / SAE A633") BS United Kingdom · 1 - [50C Indicative](/materials/bs/50c "BS 50C") AFNOR France · 1 - [E36-3 Indicative](/materials/afnor/e36-3 "AFNOR E36-3") UNE Spain · 1 - [AE355C Indicative](/materials/une/ae355c "UNE AE355C") ISO International · 2 - [E355C Indicative](/materials/afnor/e355c "ISO E355C") - [Fe510C Indicative](/materials/uni/fe510c "ISO Fe510C") NS Norway · 1 - [NS12153 Indicative](/materials/ns/ns12153 "NS NS12153") JIS Japan · 1 - [SS490B Indicative](/materials/jis/ss490b "JIS SS490B") GB China · 1 - [16Mn Indicative](/materials/gb/16mn "GB 16Mn") NP Portugal · 1 - [FE510-C Indicative](/materials/uni/fe510c "NP FE510-C") UNI Italy · 1 - [Fe510C Indicative](/materials/uni/fe510c "UNI Fe510C") SS Sweden · 2 - [2132-01 Indicative](/materials/ss/2132-01 "SS 2132-01") - [2134-01 Indicative](/materials/ss/2134-01 "SS 2134-01") ČSN Czechia · 2 - [11523 Indicative](/materials/csn/11523 "ČSN 11523") - [422 660 Indicative](/materials/csn/422-660 "ČSN 422 660") STN Slovakia · 1 - [11 523 Indicative](/materials/csn/11523 "STN 11 523") PN Poland · 1 - [18G2A Indicative](/materials/pn/18g2a "PN 18G2A") SRPS Serbia · 1 - [Č.0561 Indicative](/materials/srps/c-0561 "SRPS Č.0561") MSZ Hungary · 2 - [52 C Indicative](/materials/msz/52-c "MSZ 52 C") - [Fe 355 C Indicative](/materials/msz/fe-355-c "MSZ Fe 355 C") ÖNORM Austria · 1 - [St510C Indicative](/materials/onorm/st510c "ÖNORM St510C") NBN Belgium · 1 - [AE355C Indicative](/materials/une/ae355c "NBN AE355C") SFS Finland · 1 - [Fe52C Indicative](/materials/sfs/fe52c "SFS Fe52C") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 7 elements on file · weight % What this alloy is Fe Mn Si Cu Iron — the balance, never listed by a standard — 97 % Mn — 1.6 % Si — 0.6 % Cu — 0.6 % Traces & impurities · 0.3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.2 | | Si | ≤ 0.55 | | Mn | ≤ 1.6 | | P | 0.03 | | S | 0.03 | | Cu | ≤ 0.55 | | N | 0.012 | Carbon Silicon 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 | ≤0,20 | — | 0.200 | Max | | N | 0,012 | 0.012 | 0.012 | Exact | | Si | ≤0,55 | — | 0.550 | Max | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Mn | ≤1,60 | — | 1.600 | 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: 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. ## 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 / Si 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. [S355JR 1.0045 Mn ≤1,60 · Si ≤0,55 - ΔMn 0.00 - ΔSi 0.00 - 32 designations](/materials/din-en/s355jr "S355JR")[S320GP 1.0046 Mn ≤1,60 · Si ≤0,55 - ΔMn 0.00 - ΔSi 0.00 - 3 designations](/materials/din-en/s320gp "S320GP")[S355GP 1.0083 Mn ≤1,60 · Si ≤0,55 - ΔMn 0.00 - ΔSi 0.00 - 5 designations](/materials/din-en/s355gp "S355GP")[P235G1T1 1.0253 Mn ≤1,60 · Si ≤0,55 - ΔMn 0.00 - ΔSi 0.00 - 3 designations](/materials/din-en/p235g1t1 "P235G1T1")[P275T1 1.0256 Mn ≤1,60 · Si ≤0,55 - ΔMn 0.00 - ΔSi 0.00 - 7 designations](/materials/din-en/p275t1 "P275T1")[E370 1.0261 Mn ≤1,60 · Si ≤0,55 - ΔMn 0.00 - ΔSi 0.00 - 2 designations](/materials/din-en/e370 "E370") ## 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=d0e1a2ad-9edd-4372-a790-857430edbf59&designation=c8f866eb-b7e8-4f1c-b717-fe32237dd489 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/s-355-jo.pdf "Datasheet as PDF")