Grade: ST6 containing CO: 15 Size :3-6 Hardness: 86.0 Density: 13.80 Flexural strength: 270 Uses: 2.1 diameter stainless steel screws below U.S. Kennametal tungsten steel mold metal since 1938 beginning of the establishment, has received more than 500 Items related to carbide manufacturing patents. To ensure the best quality product from start to finish with, Kennametal own smelting, grinding raw materials, and the flour, pressing, sintering, grinding / polishing, it will give Kennametal has a flexible capacity to produce various grades of materials and finished products in a more Good to meet specific customer requirements. KezizTM Kenner sintering process is one of the patents, the use of this unique technology, Kenner become the world's first large-scale production of surface and internal defects in almost no tungsten / carbide materials manufacturer. Unrivaled quality assurance system, testing equipment and industry experience, Kennametal product detection level can be achieved military and nuclear industry standards. Kennametal's goal is to ensure that every customer from Kennametal products are the perfect product.