--- title: "S205GT — Unalloyed structural steels" description: "S205GT in DIN / EN: material number 1.0032, also listed as St 34-2. Category: Unalloyed structural steels. Designations recorded for this grade: 4." canonical: https://steelequivalents.com/materials/din-en/s205gt language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/s205gt.md cs: https://steelequivalents.com/cs/materiály/din-en/s205gt.md de: https://steelequivalents.com/de/werkstoffe/din-en/s205gt.md es: https://steelequivalents.com/es/materiales/din-en/s205gt.md fr: https://steelequivalents.com/fr/matériaux/din-en/s205gt.md hu: https://steelequivalents.com/hu/anyagok/din-en/s205gt.md it: https://steelequivalents.com/it/materiali/din-en/s205gt.md nl: https://steelequivalents.com/nl/materialen/din-en/s205gt.md pl: https://steelequivalents.com/pl/materiały/din-en/s205gt.md pt: https://steelequivalents.com/pt/materiais/din-en/s205gt.md ru: https://steelequivalents.com/ru/материалы/din-en/s205gt.md tr: https://steelequivalents.com/tr/malzemeler/din-en/s205gt.md zh: https://steelequivalents.com/zh/材料/din-en/s205gt.md ja: https://steelequivalents.com/ja/材料/din-en/s205gt.md ar: https://steelequivalents.com/ar/المواد/din-en/s205gt.md ko: https://steelequivalents.com/ko/재료/din-en/s205gt.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/s205gt.md hi: https://steelequivalents.com/hi/सामग्री/din-en/s205gt.md content_hash: sha256:95ee2709befd1bd2f38d42ddaa292b541fadfac20c77d4fdc6c15136c460eea1 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/s205gt > Canonical URL: https://steelequivalents.com/materials/din-en/s205gt > 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 · 4 designations # S205GT S205GT is a designation in DIN / EN for the material held under material number 1.0032, also listed as St 34-2. It is a material in the category Unalloyed structural steels. We list 4 designations recorded for this grade, in the standards DIN / EN, UNS and AISI / SAE. - [*Material no.* **1.0032**](/materials/material-no/1.0032 "Material no.: 1.0032") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **4** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=07d151e1-914b-4abf-a967-ed25c1baa4e9&designation=e0555c7d-c648-443d-b68c-a80933ce4ba4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/s205gt.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS G10100 This grade’s own name · 8 grades on that route](/materials/uns/g10100 "UNS G10100") - [AISI / SAE 1010 This grade’s own name · 10 grades on that route](/materials/aisi-sae/1010 "AISI / SAE 1010") ## 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 4 designations · 3 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 · 2 - **S205GT This grade’s own name**Formerly St 34-2 - [St 34-2 This grade’s own name Withdrawn](/materials/din-en/st-34-2 "DIN / EN St 34-2")Superseded by**S205GT** UNS United States · 1 - [G10100 This grade’s own name](/materials/uns/g10100 "UNS G10100") AISI / SAE United States · 1 - [1010 This grade’s own name](/materials/aisi-sae/1010 "AISI / SAE 1010") 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 Si C Iron — the balance, never listed by a standard — 99.1 % Mn — 0.4 % Si — 0.3 % 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 | ≤ 0.15 | | Si | ≤ 0.3 | | Mn | 0.2–0.5 | | P | 0.05 | | S | 0.05 | | N | 0.007 | Carbon Silicon 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 | ≤0,15 | — | 0.150 | Max | | N | 0,007 | 0.007 | 0.007 | Exact | | Si | ≤0,30 | — | 0.300 | Max | | P | 0,05 | 0.050 | 0.050 | Exact | | S | 0,05 | 0.050 | 0.050 | Exact | | Mn | 0,20-0,50 | 0.200 | 0.500 | 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. [St 00 1.0030 Mn 0,20-0,50 · Si ≤0,30 - ΔMn 0.00 - ΔSi 0.00 - 1 designations](/materials/din-en/st-00 "St 00")[KSt 37-2 1.0113 Mn 0,20-0,50 · Si ≤0,30 - ΔMn 0.00 - ΔSi 0.00 - 1 designations](/materials/din-en/kst-37-2 "KSt 37-2")[HC 180 Y 1.0922 Mn ≤0,70 · Si ≤0,30 - ΔMn 0.00 - ΔSi 0.00 - 1 designations](/materials/din-en/hc-180-y "HC 180 Y")[RSt 42-2 1.0042 Mn 0,20-0,50 · Si 0,03-0,30 - ΔMn 0.00 - ΔSi 0.01 - 6 designations](/materials/din-en/rst42-2 "RSt 42-2")[St 50-1 1.0052 Mn 0,20-0,50 · Si 0,03-0,30 - ΔMn 0.00 - ΔSi 0.01 - 1 designations](/materials/din-en/st-50-1 "St 50-1")[RSt 34-1 1.0057 Mn 0,20-0,50 · Si 0,03-0,30 - ΔMn 0.00 - ΔSi 0.01 - 1 designations](/materials/din-en/rst-34-1 "RSt 34-1") ## 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=07d151e1-914b-4abf-a967-ed25c1baa4e9&designation=e0555c7d-c648-443d-b68c-a80933ce4ba4 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/s205gt.pdf "Datasheet as PDF")