--- title: "SKH — High-speed steels" description: "SKH in JIS: material number 1.3355, also listed as HS18-0-1. It is a material in the category High-speed steels. Designations recorded for this grade: 43." canonical: https://steelequivalents.com/materials/jis/skh language: en robots: index, follow og_type: website type: material-detail language_alternates: en: https://steelequivalents.com/materials/jis/skh.md cs: https://steelequivalents.com/cs/materiály/jis/skh.md de: https://steelequivalents.com/de/werkstoffe/jis/skh.md es: https://steelequivalents.com/es/materiales/jis/skh.md fr: https://steelequivalents.com/fr/matériaux/jis/skh.md hu: https://steelequivalents.com/hu/anyagok/jis/skh.md it: https://steelequivalents.com/it/materiali/jis/skh.md nl: https://steelequivalents.com/nl/materialen/jis/skh.md pl: https://steelequivalents.com/pl/materiały/jis/skh.md pt: https://steelequivalents.com/pt/materiais/jis/skh.md ru: https://steelequivalents.com/ru/материалы/jis/skh.md tr: https://steelequivalents.com/tr/malzemeler/jis/skh.md zh: https://steelequivalents.com/zh/材料/jis/skh.md ja: https://steelequivalents.com/ja/材料/jis/skh.md ar: https://steelequivalents.com/ar/المواد/jis/skh.md ko: https://steelequivalents.com/ko/재료/jis/skh.md pt-br: https://steelequivalents.com/pt-br/materiais/jis/skh.md hi: https://steelequivalents.com/hi/सामग्री/jis/skh.md content_hash: sha256:c5d9f7931c5aebabe3217552a6dd646b9e6b15bcd464e4244976833dc48bc7ee 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/skh > Canonical URL: https://steelequivalents.com/materials/jis/skh > 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 · 43 designations # SKH SKH is a designation in JIS for the material held under material number 1.3355, also listed as HS18-0-1. It is a material in the category High-speed steels. We list 43 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, ISO, SAE AMS, JIS, GB, GOST, UNI, SS, ČSN, STN, SRPS, PN, MSZ, STAS, BDS, ÖNORM and KS. - [*Material no.* **1.3355**](/materials/material-no/1.3355 "Material no.: 1.3355") - [*Category* **High-speed steels · 59 grades**](/categories/high-speed-steels "Category: High-speed steels · 59 grades") - *Designations* **43** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=98d130f2-0d30-4192-8709-c79613a87819&designation=cedc1471-edff-4cee-93c3-3543c8fa71ab "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/skh.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN HS18-0-1 This grade’s own name](/materials/din-en/hs18-0-1 "DIN / EN HS18-0-1") - [UNS T12001 This grade’s own name](/materials/uns/t12001 "UNS T12001") - [AISI / SAE T1 This grade’s own name](/materials/aisi-sae/t1 "AISI / SAE T1") - [KS SKH2 This grade’s own name](/materials/ks/skh2 "KS SKH2") ## 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 43 designations · 23 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 - [1.3355 Indicative](/materials/material-no/1.3355 "DIN / EN 1.3355") - [HS18-0-1 This grade’s own name](/materials/din-en/hs18-0-1 "DIN / EN HS18-0-1") - [S18-0-1 This grade’s own name Withdrawn](/materials/din-en/s18-0-1 "DIN / EN S18-0-1") UNS United States · 1 - [T12001 This grade’s own name](/materials/uns/t12001 "UNS T12001") AISI / SAE United States · 2 - [T1 This grade’s own name](/materials/aisi-sae/t1 "AISI / SAE T1") - [T12001 Indicative](/materials/uns/t12001 "AISI / SAE T12001") ASTM United States · 2 - [AMS 5626 Indicative](/materials/astm/ams-5626 "ASTM AMS 5626") - [T1 Indicative](/materials/aisi-sae/t1 "ASTM T1") BS United Kingdom · 2 - [3355 Indicative](/materials/bs/3355 "BS 3355") - [BT1 Indicative](/materials/bs/bt1 "BS BT1") AFNOR France · 4 - [18-04-01 Indicative](/materials/afnor/18-04-01 "AFNOR 18-04-01") - [HS18-0-1 Indicative](/materials/din-en/hs18-0-1 "AFNOR HS18-0-1") - [Z80WCV Indicative](/materials/afnor/z80wcv "AFNOR Z80WCV") - [Z80WCV18-04-01 Indicative](/materials/afnor/z80wcv18-04-01 "AFNOR Z80WCV18-04-01") UNE Spain · 5 - [18-0-1 Indicative](/materials/une/18-0-1 "UNE 18-0-1") - [ET1 Indicative](/materials/une/et1 "UNE ET1") - [F.5520 Indicative](/materials/une/f-5520 "UNE F.5520") - [F.5601 Indicative](/materials/une/f-5601 "UNE F.5601") - [HS18-0-1 Indicative](/materials/din-en/hs18-0-1 "UNE HS18-0-1") ISO International · 1 - [HS18-0-1 Indicative](/materials/din-en/hs18-0-1 "ISO HS18-0-1") SAE AMS United States / Aerospace · 1 - [5626 Indicative](/materials/ams/5626 "SAE AMS 5626") JIS Japan · 2 - **SKH Indicative** - [SKH2 Indicative](/materials/ks/skh2 "JIS SKH2") GB China · 1 - [W18Cr4V Indicative](/materials/gb/w18cr4v "GB W18Cr4V") GOST Russia / CIS · 2 - [R18 Indicative](/materials/bds/r18 "GOST R18") - [Р18 Indicative](/materials/bds/r18 "GOST Р18") UNI Italy · 3 - [HS18-0-1 Indicative](/materials/din-en/hs18-0-1 "UNI HS18-0-1") - [X75W18KU Indicative](/materials/uni/x75w18ku "UNI X75W18KU") - [X75WCrV18 Indicative](/materials/uni/x75wcrv18 "UNI X75WCrV18") SS Sweden · 2 - [2721 Indicative](/materials/ss/2721 "SS 2721") - [2750 Indicative](/materials/ss/2750 "SS 2750") ČSN Czechia · 2 - [19810 Indicative](/materials/csn/19810 "ČSN 19810") - [19824 Indicative](/materials/csn/19824 "ČSN 19824") STN Slovakia · 1 - [19 824 Indicative](/materials/csn/19824 "STN 19 824") SRPS Serbia · 1 - [Č.6880 Indicative](/materials/srps/c-6880 "SRPS Č.6880") PN Poland · 1 - [SW18 Indicative](/materials/pn/sw18 "PN SW18") MSZ Hungary · 1 - [R3 Indicative](/materials/msz/r3 "MSZ R3") STAS Romania · 1 - [Rp3 Indicative](/materials/stas/rp3 "STAS Rp3") BDS Bulgaria · 2 - [HS18-0-1 Indicative](/materials/din-en/hs18-0-1 "BDS HS18-0-1") - [R18 Indicative](/materials/bds/r18 "BDS R18") ÖNORM Austria · 2 - [BOHLERS200 Indicative](/materials/onorm/bohlers200 "ÖNORM BOHLERS200") - [S200 Indicative](/materials/onorm/s200 "ÖNORM S200") KS South Korea · 1 - [SKH2 This grade’s own name](/materials/ks/skh2 "KS SKH2") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 8 elements on file · weight % What this alloy is Fe W Cr V Iron — the balance, never listed by a standard — 75.1 % W — 18 % Cr — 4.2 % V — 1.1 % Traces & impurities · 1.7 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.73–0.83 | | Si | ≤ 0.45 | | Mn | ≤ 0.4 | | P | 0.03 | | S | 0.03 | | Cr | 3.8–4.5 | | V | 1–1.2 | | W | 17.2–18.7 — Unusual | Carbon Silicon Manganese Phosphorus Sulfur Chromium Vanadium Tungsten 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 | 0,73-0,83 | 0.730 | 0.830 | Range | | Si | ≤0,45 | — | 0.450 | Max | | P | 0,03 | 0.030 | 0.030 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | V | 1,00-1,20 | 1.000 | 1.200 | Range | | Cr | 3,80-4,50 | 3.800 | 4.500 | Range | | Mn | ≤0,40 | — | 0.400 | Max | | W | 17,2-18,7 | 17.200 | 18.700 | 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, Mo. ## Physical & mechanical properties Density 8,7 g/cm³ Exact Transformation point Ac1 820 °C Exact Transformation point Ac3 860 °C Exact · Ac3(Acm) Transformation point Ar3 770 °C Exact · Ar3(Arcm) Transformation point Ar1 725 °C Exact Weldability readily weldable As published: without limitations. 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 · 33 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 | 840 | 510 | 8 | 10 | 190 | By delivery state**no delivery state stated** source `splav` | Delivery state | HB | |---|---| | (annealing) , GOST 19265-73 | 255 | 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 | 8.8 | 228 | — | 419 | | 100 | — | 223 | 26 | 472 | | 200 | — | 219 | 27 | 544 | | 300 | — | 210 | 28 | 627 | | 400 | — | 201 | 29 | 718 | | 500 | — | 192 | 28 | 815 | | 600 | — | 181 | 27 | 922 | | 700 | — | — | 27 | 1037 | | 800 | — | — | — | 1152 | | 900 | — | — | — | 1173 | 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 1250–1270 °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/azhlNWIxMTQ4NTA_ "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 / Cr 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. [1.3255 1.3255 W 17,5-18,5 · Cr 3,80-4,50 - ΔW 0.05 - ΔCr 0.00 - 25 designations](/materials/material-no/1.3255 "1.3255")[HS18-1-2-15 1.3257 W 17,5-18,5 · Cr 3,80-4,50 - ΔW 0.05 - ΔCr 0.00 - 2 designations](/materials/din-en/hs18-1-2-15 "HS18-1-2-15")[HS18-1-2-10 1.3265 W 17,5-18,5 · Cr 3,80-4,50 - ΔW 0.05 - ΔCr 0.00 - 9 designations](/materials/din-en/hs18-1-2-10 "HS18-1-2-10")[S18-1-1 1.3357 W 17,5-18,5 · Cr 3,80-4,50 - ΔW 0.05 - ΔCr 0.00 - 1 designations](/materials/din-en/s18-1-1 "S18-1-1") ## 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=98d130f2-0d30-4192-8709-c79613a87819&designation=cedc1471-edff-4cee-93c3-3543c8fa71ab "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/jis/skh.pdf "Datasheet as PDF")