... -treatment for Steel Bar, Tie Rod, Bolt, Screw-thread Bar, Pipe, etc Capacity: 18,000t/a(Max.) Processing: Quenching+TemperingCapacity: 18 ... ,000 t/a (Max.)Product Diameter: 20~100 mmLength: 12 m (Max.)Yeild Strength: 600~1080 MPaTensile Strength ... , GB/T 20934-2007, MT 146.2-2002 Steel Bar/Pipe Heat-treatment Processing Line