--- title: "QSt 44-2 — Unalloyed structural steels" description: "QSt 44-2: 8 equivalent designations across 6 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/qst-44-2 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/qst-44-2.md cs: https://steelequivalents.com/cs/materiály/din-en/qst-44-2.md de: https://steelequivalents.com/de/werkstoffe/din-en/qst-44-2.md es: https://steelequivalents.com/es/materiales/din-en/qst-44-2.md fr: https://steelequivalents.com/fr/matériaux/din-en/qst-44-2.md hu: https://steelequivalents.com/hu/anyagok/din-en/qst-44-2.md it: https://steelequivalents.com/it/materiali/din-en/qst-44-2.md nl: https://steelequivalents.com/nl/materialen/din-en/qst-44-2.md pl: https://steelequivalents.com/pl/materiały/din-en/qst-44-2.md pt: https://steelequivalents.com/pt/materiais/din-en/qst-44-2.md ru: https://steelequivalents.com/ru/материалы/din-en/qst-44-2.md tr: https://steelequivalents.com/tr/malzemeler/din-en/qst-44-2.md zh: https://steelequivalents.com/zh/材料/din-en/qst-44-2.md ja: https://steelequivalents.com/ja/材料/din-en/qst-44-2.md ar: https://steelequivalents.com/ar/المواد/din-en/qst-44-2.md ko: https://steelequivalents.com/ko/재료/din-en/qst-44-2.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/qst-44-2.md hi: https://steelequivalents.com/hi/सामग्री/din-en/qst-44-2.md content_hash: sha256:8a4d64bf36e8ff76f7442eab084930166fff45b0e11a3feeb6a5894beb89a33a 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/qst-44-2 > Canonical URL: https://steelequivalents.com/materials/din-en/qst-44-2 > 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 · 8 designations # QSt 44-2 S275JRC is a material in the category [Unalloyed structural steels](/categories/unalloyed-structural-steels "Unalloyed structural steels"), held under material number 1.0128. Its recorded composition includes C ≤ 0.21%, N 0.009%, P 0.045%, S 0.045% and Mn ≤ 1.5%. We list 7 designations recorded for this grade, in the standards DIN / EN, BS, AFNOR, ČSN, STN and NBN. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.0128**](/materials/material-no/1.0128 "Material no.: 1.0128") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **8** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=6d48991f-f66c-4918-bc56-1a56b818b5e0&designation=13181500-740f-4bb7-ad8d-69bd2db5a436 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/qst-44-2.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN S275JRC This grade’s own name](/materials/din-en/s275jrc "DIN / EN S275JRC") ## 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 8 designations · 6 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 · 3 - **QSt 44-2 This grade’s own name** - [S275JRC This grade’s own name](/materials/din-en/s275jrc "DIN / EN S275JRC")Formerly St 44-2 - [St 44-2 This grade’s own name](/materials/din-en/st-44-2 "DIN / EN St 44-2") BS United Kingdom · 1 - [43B Indicative](/materials/bs/43b "BS 43B") AFNOR France · 1 - [E28-2 Indicative](/materials/afnor/e28-2 "AFNOR E28-2") ČSN Czechia · 1 - [11443 Indicative](/materials/csn/11443 "ČSN 11443") STN Slovakia · 1 - [11 443 Indicative](/materials/csn/11443 "STN 11 443") NBN Belgium · 1 - [AE275-B Indicative](/materials/une/ae275b "NBN AE275-B") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 5 elements on file · weight % What this alloy is Fe Mn C P Iron — the balance, never listed by a standard — 98.2 % Mn — 1.5 % C — 0.2 % P — 0 % 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 | 0.045 | | S | 0.045 | | N | 0.009 | Carbon Manganese Phosphorus Sulfur 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 | 0,009 | 0.009 | 0.009 | Exact | | P | 0,045 | 0.045 | 0.045 | Exact | | S | 0,045 | 0.045 | 0.045 | Exact | | Mn | ≤1,50 | — | 1.500 | 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. ## 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=6d48991f-f66c-4918-bc56-1a56b818b5e0&designation=13181500-740f-4bb7-ad8d-69bd2db5a436 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/qst-44-2.pdf "Datasheet as PDF")