JIS SKT4 Steel
Hot Work Tool Steel
Product : W500
Kategori : Hot Work Tool Steel
Standard: JIS G 4404
Grades : SKT 4
Characteristic
Hot working die steel
Preserving the hardness when hot treatment
Good abrasion resistance
High ductility and abrasion resistance
Good hardness and hardenability
Insensitivity to temper brittleness because of the molybdenum in steel
Special Use: Mold Steel
Equivalent
Steel Classification
|
Standard
|
Assab
|
Bohler
|
Daido
|
Thyssen
|
Hitachi
|
|||
DIN
|
JIS
|
AISI
|
|||||||
Hot Work Steel
|
1.2714
|
SKT
4
|
L6
|
SOMDIE
|
W500
|
GFA
|
2714
|
DM
|
|
1.2367
|
-
|
-
|
QRO90
|
W303
|
-
|
2367
|
-
|
||
1.2767
|
-
|
-
|
Grane
|
K600
|
-
|
-
|
-
|
||
Availability
Round Bar: Φ 12-410mm
Flat: 8-160*205-710mm
Mould: 200*200-1200*1000mm
Length: 1000-6000mm
Chemical Composition
| Grade | C | Si | S | P | Mn | Cr | V | Mo |
| SKT4 | 0.50-0.60 | 0.10-0.40 | 0.005 | 0.025 | 0.60-0.90 | 0.80-1.20 | 0.05-0.15 | 0.35-0.55 |
Mechanical Properties
| Properties | SKT4 | |
| Annealing (°C): | 500 | |
| Air cooling or furnace cooling (HB): | 197-241 | |
| Quenching (°C) : | 830-860 | |
| Oil cooling (HRC) : | 53-58 | |
| Backfire 490-510°C : | 41-47 HRC | small-sized forging die |
| Backfire 520-540°C : | 38-41 HRC | medium-sized forging die |
| Backfire 560-580°C : | 34-37 HRC | large-sized forging die |
| Backfire 620-640°C : | 34-37 HRC | medium-sized forging die |
| Backfire 640-660°C : | 30-35 HRC | small-sized forging die |
Physical Properties
| Properties | SKT4 | |
| Density (×1000 kg/m3) | 7.84 | |
| Modulus of elasticity (GPa) | 190-210 | |
| Thermal conductivity (W/m.K) | 36.0 | |
| Specific Heat (J/kg-K) | 0.46 | |
| Electrical Resistivity (Ohm.mm2/m) | 0.30 | |
| Poisson’s ratio | 0.27- 0.30 |
Applications
Tool Steel Bar, forging dies of all types, hammer forging dies up to largest dimensions, tools for tube and rod extrusion such as rams, bolsters, mandrels, plungers, sleeves, die holders, backing plates, chipping beds, press dies for mould parts, deep engraving dies, containers for die casting presses, hot forming dies, bending and heavy embossing tools, hot mill rolls, hammers and pile drivers, hot punching tools, very hard cold work dies and punches, hot shear blades, blocks for dies, forging saddles, pressing spindles, shrink rings, armoured trim dies, hydro forming tools, plastic moulds, hot gripper and heading dies.
Related Tool Steel:
| Related Tool Steel Product: | |||||
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