--- title: "D 20 EK — Unalloyed structural steels" description: "D 20 EK: 1 equivalent designations across 1 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/d-20-ek language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/d-20-ek.md cs: https://steelequivalents.com/cs/materiály/din-en/d-20-ek.md de: https://steelequivalents.com/de/werkstoffe/din-en/d-20-ek.md es: https://steelequivalents.com/es/materiales/din-en/d-20-ek.md fr: https://steelequivalents.com/fr/matériaux/din-en/d-20-ek.md hu: https://steelequivalents.com/hu/anyagok/din-en/d-20-ek.md it: https://steelequivalents.com/it/materiali/din-en/d-20-ek.md nl: https://steelequivalents.com/nl/materialen/din-en/d-20-ek.md pl: https://steelequivalents.com/pl/materiały/din-en/d-20-ek.md pt: https://steelequivalents.com/pt/materiais/din-en/d-20-ek.md ru: https://steelequivalents.com/ru/материалы/din-en/d-20-ek.md tr: https://steelequivalents.com/tr/malzemeler/din-en/d-20-ek.md zh: https://steelequivalents.com/zh/材料/din-en/d-20-ek.md ja: https://steelequivalents.com/ja/材料/din-en/d-20-ek.md ar: https://steelequivalents.com/ar/المواد/din-en/d-20-ek.md ko: https://steelequivalents.com/ko/재료/din-en/d-20-ek.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/d-20-ek.md hi: https://steelequivalents.com/hi/सामग्री/din-en/d-20-ek.md content_hash: sha256:e47f0752f2278ffd80746936c689da4807797c075c3715f71d404c4be9022b78 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/d-20-ek > Canonical URL: https://steelequivalents.com/materials/din-en/d-20-ek > 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 · 1 designation # D 20 EK D 20 EK is a material in the category [Unalloyed structural steels](/categories/unalloyed-structural-steels "Unalloyed structural steels"), held under material number 1.0343. Its recorded composition includes C ≤ 0.1%, Si ≤ 0.3%, P 0.035%, S 0.03% and Mn 0.4–1%. No cross-standard equivalents are recorded for this grade yet. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.0343**](/materials/material-no/1.0343 "Material no.: 1.0343") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **1** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=0066cfed-e3ef-4eae-bdf9-6f59f7527bfe&designation=671c58f0-de88-40f4-b839-680900390348 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/d-20-ek.pdf "Datasheet as PDF") ## 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. ## Chemical composition 6 elements on file · weight % What this alloy is Fe Mn Si C Iron — the balance, never listed by a standard — 98.8 % Mn — 0.7 % Si — 0.3 % C — 0.1 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | ≤ 0.1 | | Si | ≤ 0.3 | | Mn | 0.4–1 | | P | 0.035 | | S | 0.03 | | Al | ≥ 0.015 | Carbon Silicon Manganese Phosphorus Sulfur Aluminium 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 | ≤0,10 | — | 0.100 | Max | | Al | ≥0,015 | 0.015 | — | Min | | Si | ≤0,30 | — | 0.300 | Max | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Mn | 0,40-1,00 | 0.400 | 1.000 | Range | 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. [S235JRG2CuC 1.0170 Mn ≤1,40 · Si 0,03-0,30 - ΔMn 0.00 - ΔSi 0.01 - 1 designations](/materials/din-en/s235jrg2cuc "S235JRG2CuC")[E275 1.0225 Mn ≤1,40 · Si ≤0,35 - ΔMn 0.00 - ΔSi 0.02 - 7 designations](/materials/din-en/e275 "E275")[E320 1.0237 Mn ≤1,40 · Si ≤0,35 - ΔMn 0.00 - ΔSi 0.02 - 3 designations](/materials/din-en/e320 "E320")[P265TR1 1.0258 Mn ≤1,40 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.05 - 1 designations](/materials/din-en/p265tr1 "P265TR1")[P265TR2 1.0259 Mn ≤1,40 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.05 - 1 designations](/materials/din-en/p265tr2 "P265TR2")[L275 1.0260 Mn ≤1,40 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.05 - 1 designations](/materials/din-en/l275 "L275") ## 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=0066cfed-e3ef-4eae-bdf9-6f59f7527bfe&designation=671c58f0-de88-40f4-b839-680900390348 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/d-20-ek.pdf "Datasheet as PDF")