| After-sales Service: | 24 Hours on Line |
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| Warranty: | Three Years |
| Type: | Steel Plate |
| Standard: | ASTM, AISI, GB, JIS, DIN, BS |
| Certification: | ISO, RoHS, IBR |
| Surface Treatment: | Turning |
| Samples: |
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| Customization: |
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Audited Supplier SKD8 X38CrCoWV4-4-4 Hot Rolled Alloy Steel Forged SKD8 Steel Sheet/Flat/Plate
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.
| 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.
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.
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