718H mould steel has excellent polishing performance and photolithographic properties. It also has high hardenability, good electrical workability and skin texture workability. Pre-hardened steel can be used in the mold cavity without quenching. The flange can be flame hardened, which can increase the hardness to 52HRC.
Fake 718H mold steel has many harmful impurities and poor polishing properties. It is resulted in poor appearance of plastic products and reducing the grade of plastic products.
Inferior 718H material has poor purity, many harmful impurities, and unstable steel structure. The instability of the mold size causes the dimensional accuracy of plastic products to decrease. It requires frequent mold repairs, increasing maintenance costs, and reducing product quality and production efficiency. The mold steel alloy is unevenly distributed. The local hardness deviation is large, which resulted in insufficient mold wear resistance. the mold is easy to collapse, and the plastic products have more burrs. It is necessary to periodically weld and repair the mold, and increase the labor of deburring. If it is used for large molds, the mold is deformed severely after processing. That will cause the mold to open and close smoothly.
Application of 718H mould steel:
1) Large plastic molds such as home appliances, computer shells and other molds.
2) High surface finish plastic molds, such as telephones, speakers, PMMA, etc.
3) Plastic molds with a long-life production capacity of more than 500,000 molds.
4) Due to its high hardness, it can be used for wear-resistant parts such as sliders, inserts and rows of plastic molds.
5) Forming tool, compression-brake die (wan plate machine die), (flame hardening or nitriding treatment can be applied according to production needs).
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