Sell Truck Brake Drums Brake Parts Brakes

Brake Drum Material: Gray iron/ ductile ironCasting: Automatic production line including sand mixing, molding and pouringMachining: CNC machining centerInspection: Advance test equipment including CMM, tensile strength testing machine, hardness tester, spectrometer, parallel tester, etc.Every detail contributes to our products of consistent quality and excellent performance Detailed Product Description(1)Material: Gray Iron 250(2)Weight: 20kg_85kg(3)Chemical composition:C: 3.0-3.3% Si: 1.6-1.9% Mn: 0.7-0.9%P: 0.12% S: 0.12%(4)Mechanics performance:Main body degree of hardness: 163-255HBSTesting rod tensile strength: ≥ 220Mpa. Our Produce process as the follows: Melting Sand Mixing ----Molding -----Pouring ----Cooling ----Drilling ---Inner and Outer Surface machining ---Shot Blasting --Cleaning of Casting -Precision Grinding ---Inspection --Rust Preventive treatment -packing