... Standard ASTM B863Diameter 0.03mm ~ 7.0mm Delivery Surface 1. Black: The surface with oxide; 2. White: That is use of ... oxide;3. Bright: That is, no chemical treatment, the surface is the material color, glossy.Features 1.Toughness, light ... ,3.Bear high & low temperature, etc. ApplicationsJewelry, Medical Devices, Industrial, Mechanical part, fastener, rack, electrode materials, welding materials, etc ...