A tough core and a hard case are the desired attributes of case-hardened steel components. Wood screws, floor screws, and sheet metal screws have flat heads that sit flush when holding material together. This can increase the lifespan of your object meaning fewer replacements and maintenance costs. Hardened Steel Lasts Longer. The choice of a case-hardening process can affect the durability of the hardened part. There are several widely used case-hardening processes for steel. Case-hardening steel. Case Hardened Steel Screws. 998 products. This combination of properties provides wear resistance and fatigue strength at the surface, and impact strength in the core. These include atmosphere carburizing, vacuum carburizing, and induction hardening, among others. It is achieved by carburizing the component’s surface, then quenching and tempering the part. They are inserted and removed by turning in one direction or another. Nitrided surfaces do not lose their hardness at temperatures in the vicinity of 150°C (302°F), as is the case with carburized steels. The extra strength that comes from case hardening your steel produces a tough outer layer (called the case) while keeping the inner core (case depth) soft enough to absorb shock. Screws are threaded fasteners that create permanent or temporary assemblies. Case hardening of steel gears by nitriding produces low cost, wear-resistant load bearing surfaces with minimal distortion.

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