--- title: "A 29 1015 — Unalloyed structural steels" description: "A 29 1015 in ASTM: material number 1.0234, also listed as QSt 38-3. Category: Unalloyed structural steels. Designations recorded for this grade: 14." canonical: https://steelequivalents.com/materials/astm/a-29-1015 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/astm/a-29-1015.md cs: https://steelequivalents.com/cs/materiály/astm/a-29-1015.md de: https://steelequivalents.com/de/werkstoffe/astm/a-29-1015.md es: https://steelequivalents.com/es/materiales/astm/a-29-1015.md fr: https://steelequivalents.com/fr/matériaux/astm/a-29-1015.md hu: https://steelequivalents.com/hu/anyagok/astm/a-29-1015.md it: https://steelequivalents.com/it/materiali/astm/a-29-1015.md nl: https://steelequivalents.com/nl/materialen/astm/a-29-1015.md pl: https://steelequivalents.com/pl/materiały/astm/a-29-1015.md pt: https://steelequivalents.com/pt/materiais/astm/a-29-1015.md ru: https://steelequivalents.com/ru/материалы/astm/a-29-1015.md tr: https://steelequivalents.com/tr/malzemeler/astm/a-29-1015.md zh: https://steelequivalents.com/zh/材料/astm/a-29-1015.md ja: https://steelequivalents.com/ja/材料/astm/a-29-1015.md ar: https://steelequivalents.com/ar/المواد/astm/a-29-1015.md ko: https://steelequivalents.com/ko/재료/astm/a-29-1015.md pt-br: https://steelequivalents.com/pt-br/materiais/astm/a-29-1015.md hi: https://steelequivalents.com/hi/सामग्री/astm/a-29-1015.md content_hash: sha256:6ddadaf2367702c2eaffb9576e5c04005adfe075a2a7e49efe671580c64885cd 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/astm/a-29-1015 > Canonical URL: https://steelequivalents.com/materials/astm/a-29-1015 > 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. ASTM · United States · 14 designations # A 29 1015 A 29 1015 is a designation in ASTM for the material held under material number 1.0234, also listed as QSt 38-3. It is a material in the category Unalloyed structural steels. We list 14 designations recorded for this grade, in the standards DIN / EN, ASTM, ISO, JIS, GB, GOST, UNI and KS. - [*Material no.* **1.0234**](/materials/material-no/1.0234 "Material no.: 1.0234") - [*Category* **Unalloyed structural steels · 452 grades**](/categories/unalloyed-structural-steels "Category: Unalloyed structural steels · 452 grades") - *Designations* **14** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=63b91026-cba1-49da-8f60-a8716e79e5b6&designation=74928768-d51d-43a5-aed6-b00cc9ea804d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/a-29-1015.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN C15C This grade’s own name](/materials/is/c15c "DIN / EN C15C") - [KS SWRCH15A This grade’s own name](/materials/ks/swrch15a "KS SWRCH15A") ## 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 14 designations · 8 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. DIN / EN Europe · 3 - [C15C This grade’s own name](/materials/is/c15c "DIN / EN C15C") - [C15E2C Indicative](/materials/din-en/c15e2c "DIN / EN C15E2C") - [QSt 38-3 This grade’s own name](/materials/din-en/qst-38-3 "DIN / EN QSt 38-3") ASTM United States · 2 - [1015 Indicative](/materials/aisi-sae/1015 "ASTM 1015") - **A 29 1015 Indicative** ISO International · 1 - [C15GC Indicative](/materials/iso/c15gc "ISO C15GC") JIS Japan · 3 - [SWRCH15A Indicative](/materials/ks/swrch15a "JIS SWRCH15A") - [SWRCH15K Indicative](/materials/jis/swrch15k "JIS SWRCH15K") - [SWRCH16R Indicative](/materials/jis/swrch16r "JIS SWRCH16R") GB China · 1 - [ML15 Indicative](/materials/gb/ml15 "GB ML15") GOST Russia / CIS · 2 - [15пс Indicative](/materials/gost/15ps "GOST 15пс") - [ст.15пс Indicative](/materials/gost/st-15ps "GOST ст.15пс") UNI Italy · 1 - [CB 15 Indicative](/materials/uni/cb-15 "UNI CB 15") KS South Korea · 1 - [SWRCH15A This grade’s own name](/materials/ks/swrch15a "KS SWRCH15A") 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 C Si Iron — the balance, never listed by a standard — 99.2 % Mn — 0.5 % C — 0.2 % Si — 0.1 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.13–0.17 | | Si | ≤ 0.1 | | Mn | 0.35–0.6 | | P | 0.025 | | S | 0.025 | | Al | 0.02–0.06 | 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 | 0,13-0,17 | 0.130 | 0.170 | Range | | Al | 0,020-0,060 | 0.020 | 0.060 | Range | | Si | ≤0,10 | — | 0.100 | Max | | P | 0,025 | 0.025 | 0.025 | Exact | | S | 0,025 | 0.025 | 0.025 | Exact | | Mn | 0,35-0,60 | 0.350 | 0.600 | 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. ## Heat treatment Supply condition - Annealing Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied. Source: [www.caishuku.com](https://www.caishuku.com/detail/azhlNWIxMjMxMA__ "Source: www.caishuku.com") ## 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. [DC 04 GT 1.0337 Mn 0,30-0,60 · Si ≤0,10 - ΔMn 0.03 - ΔSi 0.00 - 2 designations](/materials/din-en/dc-04-gt "DC 04 GT")[C10C 1.0214 Mn 0,30-0,50 · Si ≤0,10 - ΔMn 0.07 - ΔSi 0.00 - 6 designations](/materials/din-en/c10c "C10C")[RRSD 8 1.0325 Mn 0,35-0,55 · Si 0,05-0,15 - ΔMn 0.02 - ΔSi 0.05 - 1 designations](/materials/din-en/rrsd-8 "RRSD 8")[C8G2W 1.0324 Mn 0,38-0,62 · Si 0,05-0,17 - ΔMn 0.03 - ΔSi 0.06 - 2 designations](/materials/din-en/c8g2w "C8G2W")[C10G2 1.0208 Mn 0,40-0,60 · Si ≤0,25 - ΔMn 0.03 - ΔSi 0.08 - 2 designations](/materials/din-en/c10g2 "C10G2")[At 35-3 1.0209 Mn 0,40-0,60 · Si 0,03-0,25 - ΔMn 0.03 - ΔSi 0.09 - 1 designations](/materials/din-en/at-35-3 "At 35-3") ## 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=63b91026-cba1-49da-8f60-a8716e79e5b6&designation=74928768-d51d-43a5-aed6-b00cc9ea804d "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/astm/a-29-1015.pdf "Datasheet as PDF")