1. Each ChangZeng is built to customer's exact specifications with the finest materials. Its heat treatment includes annealed, quenched, tempered, etc
2. This product is widely used in the global market due to its high economic return. Heat treatment yields a higher wear resistance in this type of steel
3. The product features excellent hardness in terms of indentation. (Indentation hardness is the resistance of the material to indentation.) It can resist extrusion caused by high pressures. It is the best for welding, machining or other needs
1. ChangZeng has been cultivating high-level scientific and technological talents with independent innovation capabilities to provide the best quarter inch steel pipe .
2. ChangZeng also aims to receive a higher recommendation from customers. Get info!