--- title: "15 SMn 13 — Free cutting steels" description: "15 SMn 13: 6 equivalent designations across 6 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/din-en/15-smn-13 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/15-smn-13.md cs: https://steelequivalents.com/cs/materiály/din-en/15-smn-13.md de: https://steelequivalents.com/de/werkstoffe/din-en/15-smn-13.md es: https://steelequivalents.com/es/materiales/din-en/15-smn-13.md fr: https://steelequivalents.com/fr/matériaux/din-en/15-smn-13.md hu: https://steelequivalents.com/hu/anyagok/din-en/15-smn-13.md it: https://steelequivalents.com/it/materiali/din-en/15-smn-13.md nl: https://steelequivalents.com/nl/materialen/din-en/15-smn-13.md pl: https://steelequivalents.com/pl/materiały/din-en/15-smn-13.md pt: https://steelequivalents.com/pt/materiais/din-en/15-smn-13.md ru: https://steelequivalents.com/ru/материалы/din-en/15-smn-13.md tr: https://steelequivalents.com/tr/malzemeler/din-en/15-smn-13.md zh: https://steelequivalents.com/zh/材料/din-en/15-smn-13.md ja: https://steelequivalents.com/ja/材料/din-en/15-smn-13.md ar: https://steelequivalents.com/ar/المواد/din-en/15-smn-13.md ko: https://steelequivalents.com/ko/재료/din-en/15-smn-13.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/15-smn-13.md hi: https://steelequivalents.com/hi/सामग्री/din-en/15-smn-13.md content_hash: sha256:54b360438249607fac58d97b25ced379b6275c9b2a3815bd13afa1d3683cff52 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/15-smn-13 > Canonical URL: https://steelequivalents.com/materials/din-en/15-smn-13 > 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 · 6 designations # 15 SMn 13 15 SMn 13 is a material in the category [Free cutting steels](/categories/free-cutting-steels "Free cutting steels"), held under material number 1.0725. Its recorded composition includes C 0.12–0.18%, Si ≤ 0.4%, P 0.06%, S 0.08–0.18% and Mn 0.9–1.3%. We list 5 designations recorded for this grade, in the standards UNS, AISI / SAE, ČSN, STN and COPANT. Recorded mechanical properties include Rm 440–840 N/mm², A 6–10% and HB 125–178; these figures vary with the delivery condition and dimension. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.0725**](/materials/material-no/1.0725 "Material no.: 1.0725") - [*Category* **Free cutting steels · 49 grades**](/categories/free-cutting-steels "Category: Free cutting steels · 49 grades") - *Designations* **6** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=aa2ac2dc-cbd9-4cc4-9a5b-4bc5c44ab42e&designation=69a83486-6319-44c9-a5a4-468d36d34a29 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/15-smn-13.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [UNS G11170 This grade’s own name · 4 grades on that route](/materials/uns/g11170 "UNS G11170") - [AISI / SAE 1117 This grade’s own name · 4 grades on that route](/materials/aisi-sae/1117 "AISI / SAE 1117") ## About Free cutting steels Free-cutting steels are steels formulated to machine readily and produce manageable chips during cutting. Their machinability makes them suitable for turned, drilled and threaded components produced in high volumes, including small precision parts and fasteners. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 6 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. DIN / EN Europe · 1 - **15 SMn 13 This grade’s own name** UNS United States · 1 - [G11170 This grade’s own name](/materials/uns/g11170 "UNS G11170") AISI / SAE United States · 1 - [1117 This grade’s own name](/materials/aisi-sae/1117 "AISI / SAE 1117") ČSN Czechia · 1 - [11120 Indicative](/materials/csn/11120 "ČSN 11120") STN Slovakia · 1 - [11 120 Indicative](/materials/csn/11120 "STN 11 120") COPANT Latin America · 1 - [1117 Indicative](/materials/aisi-sae/1117 "COPANT 1117") 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 Si C Iron — the balance, never listed by a standard — 98.2 % Mn — 1.1 % Si — 0.4 % C — 0.2 % Traces & impurities · 0.2 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.12–0.18 | | Si | ≤ 0.4 | | Mn | 0.9–1.3 | | P | 0.06 | | S | 0.08–0.18 | Carbon Silicon Manganese Phosphorus Sulfur 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 | 0,12-0,18 | 0.120 | 0.180 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,06 | 0.060 | 0.060 | Exact | | S | 0,08-0,18 | 0.080 | 0.180 | Range | | Mn | 0,90-1,30 | 0.900 | 1.300 | 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. ## Properties by condition 2 conditions · 11 values By thickness**Cold drawn / hard** source `steelnumber` | Thickness mm | Rm N/mm² | A% | |---|---|---| | 5 – 10 | 560 – 840 | 6 | | 10 – 16 | 500 – 800 | 7 | | 16 – 40 | 470 – 770 | 8 | | 40 – 63 | 460 – 680 | 9 | | 63 – 100 | 440 – 650 | 10 | By delivery state**As rolled and turned** source `steelnumber` | Delivery state | HB | |---|---| | As rolled and turned | 125 – 178 | Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## 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. [1.0715 1.0715 Mn 0,90-1,30 · Si ≤0,05 - ΔMn 0.00 - ΔSi 0.18 - 27 designations](/materials/material-no/1.0715 "1.0715")[1.0718 1.0718 Mn 0,90-1,30 · Si ≤0,05 - ΔMn 0.00 - ΔSi 0.18 - 21 designations](/materials/material-no/1.0718 "1.0718")[11 SMnPbTe 30 1.0719 Mn 0,90-1,30 · Si ≤0,05 - ΔMn 0.00 - ΔSi 0.18 - 1 designations](/materials/din-en/11-smnpbte-30 "11 SMnPbTe 30")[11 SMnPbBiTe 30 1.0720 Mn 0,90-1,30 · Si ≤0,05 - ΔMn 0.00 - ΔSi 0.18 - 1 designations](/materials/din-en/11-smnpbbite-30 "11 SMnPbBiTe 30")[10 S 10 1.0711 Mn 0,75-1,10 · Si 0,10-0,35 - ΔMn 0.18 - ΔSi 0.02 - 9 designations](/materials/din-en/10-s-10 "10 S 10")[1.0721 1.0721 Mn 0,70-1,10 · Si ≤0,40 - ΔMn 0.20 - ΔSi 0.00 - 35 designations](/materials/material-no/1.0721 "1.0721") ## 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=aa2ac2dc-cbd9-4cc4-9a5b-4bc5c44ab42e&designation=69a83486-6319-44c9-a5a4-468d36d34a29 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/15-smn-13.pdf "Datasheet as PDF")