| Mould | |||||||
| Material | Material characteristics and Application | ||||||
| S136H | It is high grade non - embroidered tool steel. Excellent corrosion resistance, polishing rotation, wear resistance, machinability, EDM can obtain ultra mirror processing effect and high quality surface, quenching with excellent stability. The surface of the cavity remains smooth after a long period of use. Molds do not need special protection when they are operated or stored in a damp environment. Recommended for injection moulds and corrosive plastic moulds with high polishing requirements. | ||||||
| 718H | It is vacuum melted chromium-nickel-molybdenum alloy steel, modified pre-hardened plastic die steel, which has been hardened and tempered before leaving the factory. There is no risk of cracking and heat treatment deformation. It can be nitrided and flame hardened without heat treatment to improve the surface hardness and wear resistance of the die. Excellent polishing performance and improved wear resistance. Used for injection and extrusion moulds for thermoplastic materials, plastic moulds with high surface finish, blow moulding moulds, forming moulds, structural parts, shafts. | ||||||
| P20 | P20 die steel is a type of plastic die steel, because its machining performance is better, has a certain abrasive. As for its hardness range, it should be able to reach 285-330HB, which can be converted into 30-36HRC, so it can meet the general needs. | ||||||
| NAK80 | Pre-hardened steel (36-43 HRC), without heat treatment, can be directly machined; Surface and center hardness is uniform, good machinability; Excellent discharge machining, grinding after discharge machining is very easy, because the surface hardness of discharge machining is uniform and the hardness of white layer is low; Good mirror polishing; Good weldability; Good etching property; Stable size, suitable for precision parts and mass production. Due to the influence of its chemical composition, the material is brittle, and it is easy to crack in the place where the processing stress is concentrated when used in the more complex mold. High thermal sensitivity, it is necessary to preheat during welding, heat preservation and post-welding heat and de-stress tempering, otherwise there will be the risk of welding failure. It should be noted that the size changes will occur when the processing temperature exceeds 520℃. | ||||||
| 8402 | At high and low temperatures, it has good wear resistance, excellent toughness and ductility, stability and excellent processing and polishing rotatory, excellent high temperature strength and thermal fatigue resistance, excellent hardenability, small size deformation of heat treatment. Used for metal hot forging die, aluminum extrusion die, plastic die, aluminum die casting die, etc. | ||||||
| 8407 | 8407 special steel is a chromium, molybdenum and vanadium alloy tool steel. It is a steel with high purity and fine structure obtained by special steelmaking technology and strict quality control. The isotropy (isotropy) of 8407 is better than that of H13 in the general traditional steelmaking system. This is more valuable for the mechanical fatigue resistance and thermal stress fatigue resistance of molds, such as die-casting molds, forging molds and extrusion molds. Therefore, the die hardness of 8407 can be 1-2hrc higher than that of ordinary H13 without sacrificing toughness. High hardness can slow down the occurrence of hot cracking and improve the service life of the die | ||||||
| ASP-23 | It is chromium-molybdenum-vanadium powder steel, high wear resistance (abrasive wear resistance), high compressive strength, excellent hardenability, good toughness, good dimensional stability of heat treatment, good temper softening resistance. Asp-23 is especially suitable for thin materials to be processed and forming, or die failure due to mixed abrasive wear and adhesion wear, or knowledge abrasive wear, and the risk of surface plastic deformation is also high. For example, blanking of medium or high carbon steel, blanking of hardened steel plate or cold rolled steel strip, plastic mold containing glass fiber. | ||||||
| XW-42 | It is a kind of high carbon and high chromium alloy tool steel containing molybdenum and vanadium. Wear resistance and toughness, excellent quenching properties, is often recommended for use in molds that require good wear resistance and appropriate toughness (impact resistance). Such as: precision hardware mold, semiconductor mold, precision parts and so on. | ||||||
| #45 Steel | #45 Steel is a high-quality carbon structural steel with low hardness and easy cutting. It is often used as formwork, shoot, guide post, etc. in the mold, but it must be heat treated. The quenched and tempered parts have good comprehensive mechanical properties and are widely used in various important structural parts, especially those connecting rods, bolts, gears and shafts working under alternating loads. However, the surface hardness is low and not wear-resistant. The surface hardness of parts can be improved by quenching and tempering + surface quenching. fold | ||||||
| #50 Steel | The steel has medium machinability, low cold deformation plasticity, poor weldability, no temper brittleness during heat treatment, but low hardenability. The critical diameter in water is 13-30mm, and it tends to crack during water quenching. This steel is usually used after heat treatment such as normalizing, quenching and tempering, or high-frequency surface quenching., It is suitable for manufacturing die parts with high wear resistance and large dynamic load and impact | ||||||