JIS SKD8 | DIN X38CrCoWV4-4-4 Hot Work Tool Steel
Port: Hu nan
SKD8 alloy tool steel, SKD8 alloy steel, SKD8 tool steel, SKD8 hot work tool steel
Alloy Structural Steel, Alloy Tool Steel, Carbon Structural Steel, Carbon Tool Steel, Bearing Steel, Spring Steel ,Stainless Steel, Refractory Steel, Roll Steel, Pinion Steel. Additionally, the company also has the capacity to forge round steel, steel flat, square steel, module, shaft and roller
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 |
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SKD8 | X38CrCoWV4-4-4 |
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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 | ||||||
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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.
| 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.. |
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6: Heat treatment
Hot-working treatment : 900-1100 ℃
Annealing : temperature 820-870 ℃, holding time 2-4h, slow cooling to about 500 ℃, air cooling out of the furnace.
Quenching | salt bath furnace: 1010 / ℃
Quenching | controlled atmosphere furnace: 1020/ ℃
Tempering temperature / ℃ : 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.
