--- title: "Z90WDKCV — High-speed steels" description: "Z90WDKCV in AFNOR: material number 1.3243, also listed as HS6-5-2-5. Category: High-speed steels. Designations recorded for this grade: 49." canonical: https://steelequivalents.com/materials/afnor/z90wdkcv language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/afnor/z90wdkcv.md cs: https://steelequivalents.com/cs/materiály/afnor/z90wdkcv.md de: https://steelequivalents.com/de/werkstoffe/afnor/z90wdkcv.md es: https://steelequivalents.com/es/materiales/afnor/z90wdkcv.md fr: https://steelequivalents.com/fr/matériaux/afnor/z90wdkcv.md hu: https://steelequivalents.com/hu/anyagok/afnor/z90wdkcv.md it: https://steelequivalents.com/it/materiali/afnor/z90wdkcv.md nl: https://steelequivalents.com/nl/materialen/afnor/z90wdkcv.md pl: https://steelequivalents.com/pl/materiały/afnor/z90wdkcv.md pt: https://steelequivalents.com/pt/materiais/afnor/z90wdkcv.md ru: https://steelequivalents.com/ru/материалы/afnor/z90wdkcv.md tr: https://steelequivalents.com/tr/malzemeler/afnor/z90wdkcv.md zh: https://steelequivalents.com/zh/材料/afnor/z90wdkcv.md ja: https://steelequivalents.com/ja/材料/afnor/z90wdkcv.md ar: https://steelequivalents.com/ar/المواد/afnor/z90wdkcv.md ko: https://steelequivalents.com/ko/재료/afnor/z90wdkcv.md pt-br: https://steelequivalents.com/pt-br/materiais/afnor/z90wdkcv.md hi: https://steelequivalents.com/hi/सामग्री/afnor/z90wdkcv.md content_hash: sha256:6dd8da1990106c18315e7e9af7c59a9c1fc38e3e0ce44a1b910f39141497805b generated: 2026-09-21 --- > **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/afnor/z90wdkcv > Canonical URL: https://steelequivalents.com/materials/afnor/z90wdkcv > 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. AFNOR · France · 49 designations # Z90WDKCV Z90WDKCV is a designation in AFNOR for the material held under material number 1.3243, also listed as HS6-5-2-5. It is a material in the category High-speed steels. We list 49 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, ISO, JIS, GB, GOST, UNI, SS, ČSN, STN, SRPS, PN, MSZ, BDS, ÖNORM and KS. - [*Material no.* **1.3243**](/materials/material-no/1.3243 "Material no.: 1.3243") - [*Category* **High-speed steels · 59 grades**](/categories/high-speed-steels "Category: High-speed steels · 59 grades") - *Designations* **49** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=342424c4-6abe-4087-96fd-9ad432db2272&designation=73d6dc23-7cf8-4f3c-9d41-bac4358c2351 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/afnor/z90wdkcv.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN HS6-5-2-5 This grade’s own name](/materials/din-en/hs6-5-2-5 "DIN / EN HS6-5-2-5") - [AISI / SAE SIL 10 This grade’s own name](/materials/aisi-sae/sil-10 "AISI / SAE SIL 10") - [KS SKH55 This grade’s own name](/materials/ks/skh55 "KS SKH55") ## 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 49 designations · 20 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 - [1.3243 Indicative](/materials/material-no/1.3243 "DIN / EN 1.3243") - [HS6-5-2-5 This grade’s own name](/materials/din-en/hs6-5-2-5 "DIN / EN HS6-5-2-5") - [S 6-5-2-5 This grade’s own name Withdrawn](/materials/din-en/s-6-5-2-5 "DIN / EN S 6-5-2-5") UNS United States · 2 - [T11335 Indicative](/materials/uns/t11335 "UNS T11335") - [T11341 Indicative](/materials/uns/t11341 "UNS T11341") AISI / SAE United States · 4 - [M35 Indicative](/materials/aisi-sae/m35 "AISI / SAE M35") - [M41 Indicative](/materials/aisi-sae/m41 "AISI / SAE M41") - [SIL 10 This grade’s own name](/materials/aisi-sae/sil-10 "AISI / SAE SIL 10") - [T11341 Indicative](/materials/uns/t11341 "AISI / SAE T11341") BS United Kingdom · 2 - [3243 Indicative](/materials/bs/3243 "BS 3243") - [BM35 Indicative](/materials/bs/bm35 "BS BM35") AFNOR France · 12 - [06-05-05-04-02 Indicative](/materials/afnor/06-05-05-04-02 "AFNOR 06-05-05-04-02") - [6-5-2-5 Indicative](/materials/afnor/6-5-2-5 "AFNOR 6-5-2-5") - [HS6-5-2-5 Indicative](/materials/din-en/hs6-5-2-5 "AFNOR HS6-5-2-5") - [HS6-5-2-5HC Indicative](/materials/afnor/hs6-5-2-5hc "AFNOR HS6-5-2-5HC") - [HS6-5-2HC Indicative](/materials/afnor/hs6-5-2hc "AFNOR HS6-5-2HC") - [Z85WDKCV Indicative](/materials/afnor/z85wdkcv "AFNOR Z85WDKCV") - [Z85WDKCV06 Indicative](/materials/afnor/z85wdkcv06 "AFNOR Z85WDKCV06") - [Z85WDKCV06-05-04-02 Indicative](/materials/afnor/z85wdkcv06-05-04-02 "AFNOR Z85WDKCV06-05-04-02") - [Z85WDKCV06-05-04-02-05 Indicative](/materials/afnor/z85wdkcv06-05-04-02-05 "AFNOR Z85WDKCV06-05-04-02-05") - [Z85WDKCV06-05-05-04-02 Indicative](/materials/afnor/z85wdkcv06-05-05-04-02 "AFNOR Z85WDKCV06-05-05-04-02") - **Z90WDKCV Indicative** - [Z90WDKCV06-05-05-04-02 Indicative](/materials/afnor/z90wdkcv06-05-05-04-02 "AFNOR Z90WDKCV06-05-05-04-02") UNE Spain · 5 - [6-5-2-5 Indicative](/materials/afnor/6-5-2-5 "UNE 6-5-2-5") - [EM35 Indicative](/materials/une/em35 "UNE EM35") - [F.5607 Indicative](/materials/une/f-5607 "UNE F.5607") - [F.5613 Indicative](/materials/une/f-5613 "UNE F.5613") - [HS6-5-2-5 Indicative](/materials/din-en/hs6-5-2-5 "UNE HS6-5-2-5") ISO International · 1 - [HS6-5-2-5 Indicative](/materials/din-en/hs6-5-2-5 "ISO HS6-5-2-5") JIS Japan · 1 - [SKH55 Indicative](/materials/ks/skh55 "JIS SKH55") GB China · 2 - [N029 Indicative](/materials/gb/n029 "GB N029") - [W6Mo5Cr4V2Co5 Indicative](/materials/gb/w6mo5cr4v2co5 "GB W6Mo5Cr4V2Co5") GOST Russia / CIS · 4 - [R6M5K5 Indicative](/materials/bds/r6m5k5 "GOST R6M5K5") - [R6M5K5-MP Indicative](/materials/gost/r6m5k5-mp "GOST R6M5K5-MP") - [ДИ101-МП Indicative](/materials/gost/di101-mp "GOST ДИ101-МП") - [Р6М5К5 Indicative](/materials/bds/r6m5k5 "GOST Р6М5К5") UNI Italy · 1 - [HS6-5-2-5 Indicative](/materials/din-en/hs6-5-2-5 "UNI HS6-5-2-5") SS Sweden · 2 - [2723 Indicative](/materials/ss/2723 "SS 2723") - [2733 Indicative](/materials/ss/2733 "SS 2733") ČSN Czechia · 1 - [19852 Indicative](/materials/csn/19852 "ČSN 19852") STN Slovakia · 1 - [19 852 Indicative](/materials/csn/19852 "STN 19 852") SRPS Serbia · 1 - [Č.9780 Indicative](/materials/srps/c-9780 "SRPS Č.9780") PN Poland · 1 - [SK5M Indicative](/materials/ks/sk5m "PN SK5M") MSZ Hungary · 1 - [R8 Indicative](/materials/msz/r8 "MSZ R8") BDS Bulgaria · 2 - [HS6-5-2-5 Indicative](/materials/din-en/hs6-5-2-5 "BDS HS6-5-2-5") - [R6M5K5 Indicative](/materials/bds/r6m5k5 "BDS R6M5K5") ÖNORM Austria · 2 - [BOHLERS705 Indicative](/materials/onorm/bohlers705 "ÖNORM BOHLERS705") - [S705 Indicative](/materials/onorm/s705 "ÖNORM S705") KS South Korea · 1 - [SKH55 This grade’s own name](/materials/ks/skh55 "KS SKH55") 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 W Mo Co Iron — the balance, never listed by a standard — 76.1 % W — 6.3 % Mo — 5 % Co — 4.8 % Traces & impurities · 7.9 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.87–0.95 | | Si | ≤ 0.45 | | Mn | ≤ 0.4 | | P | 0.03 | | S | 0.03 | | Cr | 3.8–4.5 | | Mo | 4.7–5.2 | | V | 1.7–2.1 | | W | 5.9–6.7 | | Co | 4.5–5 | 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 | 0,87-0,95 | 0.870 | 0.950 | Range | | Si | ≤0,45 | — | 0.450 | Max | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | V | 1,70-2,10 | 1.700 | 2.100 | Range | | Cr | 3,80-4,50 | 3.800 | 4.500 | Range | | Mn | ≤0,40 | — | 0.400 | Max | | Co | 4,50-5,00 | 4.500 | 5.000 | Range | | Mo | 4,70-5,20 | 4.700 | 5.200 | Range | | W | 5,90-6,70 | 5.900 | 6.700 | 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 8,1 g/cm³ Exact Transformation point Ac1 840 °C Exact Transformation point Ac3 875 °C Exact · Ac3(Acm) Transformation point Ar3 805 °C Exact · Ar3(Arcm) Transformation point Ar1 765 °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 5 conditions · 19 values By delivery state**no delivery state stated** source `steeljis` | Delivery state | HB | |---|---| | Annealed | 269 | By delivery state**Soft annealed** source `steelnumber` | Delivery state | HB | |---|---| | Soft annealed | 269 | 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 | 850 | 510 | 12 | 14 | 180 | By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | (annealing) , GOST 19265-73 | 269 | At temperature**no delivery state stated** source `splav` | Temperature °C | Density g/cm³ | Elastic modulus GPa | Thermal conductivity W/(m·K) | Electrical resistivity nΩ·m | |---|---|---|---|---| | 20 | 8.2 | 220 | — | 458 | | 100 | — | — | 27 | — | | 200 | — | — | 28 | — | | 300 | — | — | 29 | — | | 400 | — | — | 30 | — | | 500 | — | — | 32 | — | | 600 | — | — | 36 | — | | 700 | — | — | 34 | — | | 900 | — | — | 29 | — | 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. ## Heat treatment **GB /T 9943-2025** In this order Test specimen 1. Preheating 800–900 °C 2. Quenching 1190–1210 °C Quenchant Oil, Salt bath or Nitrogen 3. Tempering 550 °C Supply condition - Annealing Supply condition - Quenching and Tempering Test specimen - Annealing Supply condition 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/azhlNWIxMTQ4NTc_ "Source: www.caishuku.com") ## 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 W / Mo 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. [HS 6-5-2 1.3339 W 5,90-6,70 · Mo 4,70-5,20 - ΔW 0.00 - ΔMo 0.00 - 21 designations](/materials/din-en/hs6-5-2 "HS 6-5-2")[1.3343 1.3343 W 5,90-6,70 · Mo 4,70-5,20 - ΔW 0.00 - ΔMo 0.00 - 46 designations](/materials/material-no/1.3343 "1.3343")[HS6-5-3C 1.3345 W 5,90-6,70 · Mo 4,70-5,20 - ΔW 0.00 - ΔMo 0.00 - 1 designations](/materials/din-en/hs6-5-3c "HS6-5-3C")[PMHS6-5-3 1.3394 W 5,90-6,70 · Mo 4,70-5,20 - ΔW 0.00 - ΔMo 0.00 - 2 designations](/materials/din-en/pmhs6-5-3 "PMHS6-5-3")[PMHS6-5-3C 1.3395 W 5,90-6,70 · Mo 4,70-5,20 - ΔW 0.00 - ΔMo 0.00 - 1 designations](/materials/din-en/pmhs6-5-3c "PMHS6-5-3C")[S 6-5-2-8 1.3222 W 6,00-6,70 · Mo 4,70-5,20 - ΔW 0.05 - ΔMo 0.00 - 1 designations](/materials/din-en/s-6-5-2-8 "S 6-5-2-8") ## 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=342424c4-6abe-4087-96fd-9ad432db2272&designation=73d6dc23-7cf8-4f3c-9d41-bac4358c2351 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/afnor/z90wdkcv.pdf "Datasheet as PDF")