| Type: | Alloy Steel Bar |
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| Standard: | AISI, ASTM, DIN, JIS, GB, BS |
| Composition: | Ferrous Steel Scrap |
| Technique: | Hot Rolled |
| Shape: | Plate |
| Surface Treatment: | Polished |
| Samples: |
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| Customization: |
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Audited Supplier DIN X38CrCoWV4-4-4 SKD8 Hot Work Die Steel Mould and Tool Steel
1: JIS SKD8 steel introduction
SKD8 is the most widely used hot work die steel. It has a fairly good effect on thermal fatigue crack resistance, can ensure the quality of the die, improve the service life of the die.
2: JIS SKD8 Steel equivalent
| Country | China | Japan | Germany | USA | UK |
| Standard | GB/T 1299 | JIS G4404 | DIN EN ISO4957 | ASTM A681 | BS 4659 |
| Grade | SKD8 | X38CrCoWV4-4-4 |
3: JIS SKD8 steel chemical composition
| Grade | C | Mn | P | S | Si | Cr | V | Mo | ||||||
| SKD8 | 0.40 | 0.35 | . . . | 0.01 | 0.25 | 4.35 | 2.00 | 0.40 | ||||||
|
X38CrCoWV4-4-4 |
0.35 | 0.45 | 0.20 | 0.50 | 0.03 | 0.02 | 0.15 | 0.50 | 4.00 | 4.70 | 1.70 | 2.10 | 0.30 | 0.50 |
4: JIS SKD8 steel mechanical properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.
5: JIS SKD8 steel overviews
| Size | Round | Dia 6-1200mm |
| Plate/Flat/Block | Thickness 6mm-500mm |
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| Width 20mm-1000mm |
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| Process | EAF+LF+VD+Forged+Heat treatment(optional) | |
| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Packing | standard packages or as per customers request. | |
| Delivery time | 30-45 days | |
| Application | SKD8 can be used to manufacture hot forging die, extrusion die, copper alloy die, aluminum copper magnesium hot press molding die, plastic die, etc.. | |
6: Heat treatment
Hot-working treatment : 900-1100 ºC
Annealing : temperature 820-870 ºC, holding time 2-4h, slow cooling to about 500 ºC, air cooling out of the furnace.
Quenching | salt bath furnace: 1010 / ºC
Quenching | controlled atmosphere furnace: 1020/ ºC
Tempering temperature / ºC : 550
After tempering hardness HRC or higher: 60
7: Delivery condition
For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed, rough turned.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.
Hunan Qilu Industrial Co., Ltd has the capacity to forge round steel, steel flat, square steel, module, shaft and roller, etc. The main specifications of the products include Φ80-1000mm forging materials and 80-1200mm square billets and which the maximum piece weight can reach 50T.
Hunan Qilu Industrial Co., Ltd were already engaged in exporting steel for 11 years, could supply a great variety of hot forged, hot rolled and cold drawn Steels, including engineering steel, cold work tool steel, hot work tool steel, plastic mold steel, spring steel, high speed steel, stainless steel etc., besides Qilu Industrial also has their own heating treatment shop and machining shop to provide heating and cutting service.
Since 2008 year, Hunan Qilu Industrial has the right to export all FORGED STEEL behalf of Qilu Speical Steel Co.,ltd which is specialized in smelting and forging of special steel since 1965 year, now Qilu special steel is one of the biggest manufacturer of forged product in China.The forged products are used in Automotive, Aerospace, Power Generation, Oil & Gas, Transportation and Industrial. We already set up the warehouse in Wuxi and Dongguan city, more than 20000 tons ex-stock could be supplied with kinds of size.
Qilu Industrial is the professional one-stop steel manufacturer, stockist and exporter in China, our customers spread all over the world, include West Europe, North America, South America, Asia, Middle Asia, Africa, Australia, etc.
The company owns advanced special steel smelting facilities and forging processing equipments, the main steel-making equipment include 2 sets of 50t ultra-high power electric arc furnaces,2 sets of 60t LF refining furnaces,1 set of 60t vacuum degassing refining furnace and 4 sets of 1-20t electroslag re-melting furnaces.
The main forging equipments mainly include:3 sets of 5t electro-hydraulic hammers, 1 set of high-speed forging units of 800t,1600t,2000t and 4500t respectively.
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