--- title: "35S20 — Free cutting steels" description: "35 S 20: 24 equivalent designations across 16 standards, with the recorded chemical composition shown next to the source text." canonical: https://steelequivalents.com/materials/jis/35s20 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/jis/35s20.md cs: https://steelequivalents.com/cs/materiály/jis/35s20.md de: https://steelequivalents.com/de/werkstoffe/jis/35s20.md es: https://steelequivalents.com/es/materiales/jis/35s20.md fr: https://steelequivalents.com/fr/matériaux/jis/35s20.md hu: https://steelequivalents.com/hu/anyagok/jis/35s20.md it: https://steelequivalents.com/it/materiali/jis/35s20.md nl: https://steelequivalents.com/nl/materialen/jis/35s20.md pl: https://steelequivalents.com/pl/materiały/jis/35s20.md pt: https://steelequivalents.com/pt/materiais/jis/35s20.md ru: https://steelequivalents.com/ru/материалы/jis/35s20.md tr: https://steelequivalents.com/tr/malzemeler/jis/35s20.md zh: https://steelequivalents.com/zh/材料/jis/35s20.md ja: https://steelequivalents.com/ja/材料/jis/35s20.md ar: https://steelequivalents.com/ar/المواد/jis/35s20.md ko: https://steelequivalents.com/ko/재료/jis/35s20.md pt-br: https://steelequivalents.com/pt-br/materiais/jis/35s20.md hi: https://steelequivalents.com/hi/सामग्री/jis/35s20.md content_hash: sha256:d39ae3257893cdc2ed22b368b899f95cfc87778f7ecac248092e6bcf3b05709a 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/jis/35s20 > Canonical URL: https://steelequivalents.com/materials/jis/35s20 > 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. JIS · Japan · 24 designations # 35S20 35 S 20 is a material in the category [Free cutting steels](/categories/free-cutting-steels "Free cutting steels"), held under material number 1.0726. We list 23 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, PN, STN and STAS. Its recorded composition includes C 0.32–0.39%, Si ≤ 0.4%, P 0.06%, S 0.15–0.25% and Mn 0.7–1.1%. Recorded mechanical properties include Rm 510–880 N/mm², A 6–9% and HB 149–201; these figures vary with the delivery condition and dimension. Its recorded density is 7.85 g/cm³. - [*Material no.* **1.0726**](/materials/material-no/1.0726 "Material no.: 1.0726") - [*Category* **Free cutting steels · 49 grades**](/categories/free-cutting-steels "Category: Free cutting steels · 49 grades") - *Designations* **24** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=e647c714-212c-49d3-a11c-6a88aa7ab91d&designation=3662f88a-2d40-4a51-937e-47a9089e6aaf "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/35s20.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - **DIN / EN 35 S 20 This grade’s own name** - [UNS G11400 This grade’s own name](/materials/uns/g11400 "UNS G11400") - [AISI / SAE 1140 This grade’s own name](/materials/aisi-sae/1140 "AISI / SAE 1140") ## 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 24 designations · 16 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 · 2 - [1.0726 Indicative](/materials/material-no/1.0726 "DIN / EN 1.0726") - **35 S 20 This grade’s own name** UNS United States · 1 - [G11400 This grade’s own name](/materials/uns/g11400 "UNS G11400") AISI / SAE United States · 2 - [1126 Indicative](/materials/aisi-sae/1126 "AISI / SAE 1126") - [1140 This grade’s own name](/materials/aisi-sae/1140 "AISI / SAE 1140") BS United Kingdom · 3 - [212M36 Indicative](/materials/bs/212m36 "BS 212M36") - [8M Indicative](/materials/bs/8m "BS 8M") - [EN8M Indicative](/materials/bs/en8m "BS EN8M") AFNOR France · 2 - [35MF4 Indicative](/materials/afnor/35mf4 "AFNOR 35MF4") - [35MF6 Indicative](/materials/afnor/35mf6 "AFNOR 35MF6") UNE Spain · 1 - [F210G Indicative](/materials/une/f210g "UNE F210G") ISO International · 1 - **35S20 Indicative** JIS Japan · 2 - **35S20 This grade’s own name** - [SUM4 Indicative](/materials/jis/sum4 "JIS SUM4") GB China · 2 - [Y30 Indicative](/materials/gb/y30 "GB Y30") - [Y35 Indicative](/materials/gb/y35 "GB Y35") GOST Russia / CIS · 1 - [А30 Indicative](/materials/gost/a30 "GOST А30") UNI Italy · 1 - [CF35SMn10 Indicative](/materials/uni/cf35smn10 "UNI CF35SMn10") SS Sweden · 2 - [1957 Indicative](/materials/ss/1957 "SS 1957") - [1957-03 Indicative](/materials/ss/1957-03 "SS 1957-03") ČSN Czechia · 1 - [11140 Indicative](/materials/csn/11140 "ČSN 11140") STN Slovakia · 1 - [11 140 Indicative](/materials/csn/11140 "STN 11 140") PN Poland · 1 - [A35 Indicative](/materials/gost/a35 "PN A35") STAS Romania · 1 - [AUT30 Indicative](/materials/stas/aut30 "STAS AUT30") 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 — 98.1 % Mn — 0.9 % Si — 0.4 % C — 0.4 % Traces & impurities · 0.3 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.32–0.39 | | Si | ≤ 0.4 | | Mn | 0.7–1.1 | | P | 0.06 | | S | 0.15–0.25 | 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 | 0,32-0,39 | 0.320 | 0.390 | Range | | Si | ≤0,40 | — | 0.400 | Max | | P | 0,06 | 0.060 | 0.060 | Exact | | S | 0,15-0,25 | 0.150 | 0.250 | Range | | Mn | 0,70-1,10 | 0.700 | 1.100 | 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 | 640 – 880 | 6 | | 10 – 16 | 590 – 830 | 7 | | 16 – 40 | 560 – 800 | 8 | | 40 – 63 | 530 – 760 | 9 | | 63 – 100 | 510 – 680 | 9 | By delivery state**As rolled and turned** source `steelnumber` | Delivery state | HB | |---|---| | As rolled and turned | 149 – 201 | 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. [1.0721 1.0721 Mn 0,70-1,10 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 35 designations](/materials/material-no/1.0721 "1.0721")[1.0722 1.0722 Mn 0,70-1,10 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 9 designations](/materials/material-no/1.0722 "1.0722")[45 S 20 1.0727 Mn 0,70-1,10 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 12 designations](/materials/din-en/45-s-20 "45 S 20")[35 SPb 20 1.0756 Mn 0,70-1,10 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 1 designations](/materials/din-en/35-spb-20 "35 SPb 20")[45 SPb 20 1.0757 Mn 0,70-1,10 · Si ≤0,40 - ΔMn 0.00 - ΔSi 0.00 - 2 designations](/materials/din-en/45-spb-20 "45 SPb 20")[60 SPb 20 1.0758 Mn 0,70-1,10 · Si 0,10-0,30 - ΔMn 0.00 - ΔSi 0.00 - 2 designations](/materials/din-en/60-spb-20 "60 SPb 20") ## 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=e647c714-212c-49d3-a11c-6a88aa7ab91d&designation=3662f88a-2d40-4a51-937e-47a9089e6aaf "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/35s20.pdf "Datasheet as PDF")