--- title: "S10-4-3-10 — High-speed steels" description: "S10-4-3-10 in DIN / EN: material number 1.3207, also listed as HS10-4-3-10. Category: High-speed steels. Designations recorded for this grade: 20." canonical: https://steelequivalents.com/materials/din-en/s10-4-3-10 language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/din-en/s10-4-3-10.md cs: https://steelequivalents.com/cs/materiály/din-en/s10-4-3-10.md de: https://steelequivalents.com/de/werkstoffe/din-en/s10-4-3-10.md es: https://steelequivalents.com/es/materiales/din-en/s10-4-3-10.md fr: https://steelequivalents.com/fr/matériaux/din-en/s10-4-3-10.md hu: https://steelequivalents.com/hu/anyagok/din-en/s10-4-3-10.md it: https://steelequivalents.com/it/materiali/din-en/s10-4-3-10.md nl: https://steelequivalents.com/nl/materialen/din-en/s10-4-3-10.md pl: https://steelequivalents.com/pl/materiały/din-en/s10-4-3-10.md pt: https://steelequivalents.com/pt/materiais/din-en/s10-4-3-10.md ru: https://steelequivalents.com/ru/материалы/din-en/s10-4-3-10.md tr: https://steelequivalents.com/tr/malzemeler/din-en/s10-4-3-10.md zh: https://steelequivalents.com/zh/材料/din-en/s10-4-3-10.md ja: https://steelequivalents.com/ja/材料/din-en/s10-4-3-10.md ar: https://steelequivalents.com/ar/المواد/din-en/s10-4-3-10.md ko: https://steelequivalents.com/ko/재료/din-en/s10-4-3-10.md pt-br: https://steelequivalents.com/pt-br/materiais/din-en/s10-4-3-10.md hi: https://steelequivalents.com/hi/सामग्री/din-en/s10-4-3-10.md content_hash: sha256:8cf9e80d88bd40697793ec75d205ab1c3861658b59720922f3da2f0a45e493ea 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/s10-4-3-10 > Canonical URL: https://steelequivalents.com/materials/din-en/s10-4-3-10 > 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 · 20 designations # S10-4-3-10 S10-4-3-10 is a designation in DIN / EN for the material held under material number 1.3207, also listed as HS10-4-3-10. It is a material in the category High-speed steels. We list 20 designations recorded for this grade, in the standards DIN / EN, AISI / SAE, BS, AFNOR, JIS, GOST, UNI, SS, ČSN, STN, SRPS, PN, MSZ, BDS and ÖNORM. - [*Material no.* **1.3207**](/materials/material-no/1.3207 "Material no.: 1.3207") - [*Category* **High-speed steels · 59 grades**](/categories/high-speed-steels "Category: High-speed steels · 59 grades") - *Designations* **20** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=1828197d-2275-45d4-b29d-e718425eac03&designation=607ec401-6731-46b4-9dcf-6527d1d4e79b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/s10-4-3-10.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN HS10-4-3-10 This grade’s own name](/materials/din-en/hs10-4-3-10 "DIN / EN HS10-4-3-10") ## About High-speed steels High-speed steels are alloyed tool steels designed to retain hardness and cutting ability when tools heat up during high-speed machining. Their hot hardness and wear resistance make them suitable for cutting tools such as drills, milling cutters, taps and broaches. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 20 designations · 15 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 - [HS10-4-3-10 This grade’s own name](/materials/din-en/hs10-4-3-10 "DIN / EN HS10-4-3-10") - **S10-4-3-10 This grade’s own name Withdrawn** AISI / SAE United States · 1 - [T11348 Indicative](/materials/aisi-sae/t11348 "AISI / SAE T11348") BS United Kingdom · 1 - [BT42 Indicative](/materials/bs/bt42 "BS BT42") AFNOR France · 2 - [HS10-4-3-10 Indicative](/materials/din-en/hs10-4-3-10 "AFNOR HS10-4-3-10") - [Z130WKCDV Indicative](/materials/afnor/z130wkcdv "AFNOR Z130WKCDV") JIS Japan · 1 - [SKH57 Indicative](/materials/jis/skh57 "JIS SKH57") GOST Russia / CIS · 4 - [R9M4K8 Indicative](/materials/gost/r9m4k8 "GOST R9M4K8") - [R9M4K8-MP Indicative](/materials/gost/r9m4k8-mp "GOST R9M4K8-MP") - [ДИ102-МП Indicative](/materials/gost/di102-mp "GOST ДИ102-МП") - [Р9М4К8 Indicative](/materials/gost/r9m4k8 "GOST Р9М4К8") UNI Italy · 1 - [HS10-4-3-10 Indicative](/materials/din-en/hs10-4-3-10 "UNI HS10-4-3-10") SS Sweden · 1 - [2736 Indicative](/materials/ss/2736 "SS 2736") ČSN Czechia · 1 - [19861 Indicative](/materials/csn/19861 "ČSN 19861") STN Slovakia · 1 - [19 861 Indicative](/materials/csn/19861 "STN 19 861") SRPS Serbia · 1 - [Č.9683 Indicative](/materials/srps/c-9683 "SRPS Č.9683") PN Poland · 1 - [SK10V Indicative](/materials/pn/sk10v "PN SK10V") MSZ Hungary · 1 - [R14 Indicative](/materials/msz/r14 "MSZ R14") BDS Bulgaria · 1 - [R9M4K8 Indicative](/materials/gost/r9m4k8 "BDS R9M4K8") ÖNORM Austria · 1 - [S700 Indicative](/materials/onorm/s700 "ÖNORM S700") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 10 elements on file · weight % What this alloy is Fe Co W Cr Iron — the balance, never listed by a standard — 67.4 % Co — 10 % W — 9.5 % Cr — 4.2 % Traces & impurities · 9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 1.2–1.35 | | Si | ≤ 0.45 | | Mn | ≤ 0.4 | | P | 0.03 | | S | 0.03 | | Cr | 3.8–4.5 | | Mo | 3.2–3.9 | | V | 3–3.5 | | W | 9–10 | | Co | 9.5–10.5 | Carbon Silicon Manganese Phosphorus Sulfur Chromium Molybdenum Vanadium Tungsten Cobalt 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 | 1,20-1,35 | 1.200 | 1.350 | Range | | Si | ≤0,45 | — | 0.450 | Max | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | V | 3,00-3,50 | 3.000 | 3.500 | Range | | Cr | 3,80-4,50 | 3.800 | 4.500 | Range | | Mn | ≤0,40 | — | 0.400 | Max | | Co | 9,50-10,5 | 9.500 | 10.500 | Range | | Mo | 3,20-3,90 | 3.200 | 3.900 | Range | | W | 9,00-10,0 | 9.000 | 10.000 | 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. ## Physical & mechanical properties Density 8,23 g/cm³ Exact Transformation point Ac1 800 °C Exact Transformation point Ac3 840 °C Exact · Ac3(Acm) Transformation point Ar3 790 °C Exact · Ar3(Arcm) Transformation point Ar1 750 °C 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 4 conditions · 17 values By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 302 | By heat-treated condition**no delivery state stated** source `splav` | Heat-treated condition | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | As-delivered state | 960 | 540 | 7 | 10 | 80 | By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | (annealing) , GOST 19265-73 | 285 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Elastic modulus GPa | Thermal conductivity W/(m·K) | |---|---|---|---| | 20 | 8.3 | 229 | — | | 100 | — | — | 25 | | 200 | — | — | 27 | | 300 | — | — | 28 | | 400 | — | — | 29 | | 500 | — | — | 30 | | 600 | — | — | 31 | | 700 | — | — | 32 | | 900 | — | — | 32 | 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 1.3, a shared category, and a published range for Co / W 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. [HS9-4-3-11 1.3208 Co 10,5-11,5 · W 8,40-9,10 - ΔCo 1.00 - ΔW 0.75 - 1 designations](/materials/din-en/hs9-4-3-11 "HS9-4-3-11") ## 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=1828197d-2275-45d4-b29d-e718425eac03&designation=607ec401-6731-46b4-9dcf-6527d1d4e79b "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/din-en/s10-4-3-10.pdf "Datasheet as PDF")