GB/T 37336-2019 Brake drum of automobile

GB/T 223.3-1988 Methods for chemical analysis of iron, steel and alloy—The diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus content GB/T 223.59-2008 Iron,steel and alloy—Determination of phosphorus content—Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method GB/T 223.60-1997 Methods for chemical analysis of iron,steel and alloy—The perchloric acid dehydration gravimetric method for the determination of silicon content GB/T 223.60-2024 Iron,steel and alloy—Determination of silicon content—Gravimetric method GB/T 223.62-1988 Methods for chemical analysis of iron,steel and alloy—The butyl acetate extraction photometric method for the determination of phosphorus content GB/T 223.63-1988 Methods for chemical analysis of iron,steel and alloy—The sodium(potassium)periodate photometric method for the determination of manganese content GB/T 223.63-2022 Iron,steel and alloy—Determination of manganese content—Sodium(potassium) periodate spectrophotometric method GB/T 228.1-2010 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 228.1-2021 Metallic materials—Tensile testing—Part 1:Method of test at room temperature GB/T 231.1-2002 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2009 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 231.1-2018 Metallic materials—Brinell hardness test—Part 1:Test method GB/T 1031-1995 Surface roughness parameters and their values GB/T 1031-2009 Geometrical Product Specifications (GPS)—Surface texture:Profile method—Surface roughness parameters and their values GB/T 1958-2004 Geometrical product Specifications(GPS)—Geometrical tolerance—Verification prescription GB/T 1958-2017 Geometrical Product Specifications(GPS)—Geometrical tolerance—Verification GB/T 3177-1997 Inspection of plain workpiece sizes GB/T 3177-2009 Geometrical Product Specifications (GPS)—Inspection of plain workpiece sizes GB/T 7216-1987 Gray cast iron metallography GB/T 7216-2009 Metallographic test for gray cast iron GB/T 7216-2023 Metallographic test for grey cast iron GB/T 9239.1-2006 Mechanical vibration—Balance quality requirements for rotors in a constant(rigid)state—Part 1:Specification and verification of balance tolerances GB/T 9239.2-2006 Mechanical vibration—Balance quality requirements for rotors in a constant(rigid) state—Part 2:Balance errors GB/T 9239.12-2021 Mechanical vibration—Rotor balancing—Part 12:Procedures and tolerances for rotors with flexible behaviour GB/T 9239.13-2023 Mechanical vibration—Rotor balancing—Part 13:Criteria and safeguards for the in-situ balancing of medium and large rotors GB/T 9239.14-2017 Mechanical vibration—Rotor balancing—Part 14:Procedures for assessing balance errors GB/T 9239.21-2019 Mechanical vibration—Rotor balancing—Part 21:Description and evaluation of balancing machines GB/T 9239.23-2022 Mechanical vibration—Rotor balancing—Part 23:Enclosures and other protective measures for the measuring station of balancing machines GB/T 9239.31-2023 Mechanical vibration—Rotor balancing—Part 31:Susceptibility and sensitivity of machines to unbalance GB/T 9239.32-2017 Mechanical vibration—Rotor balancing—Part 32:Shaft and fitment key convention GB/T 9439-1988 Grey iron castings GB/T 9439-2010 Grey iron castings GB/T 9439-2023 Grey iron castings GB/T 20123-2006 Steel and iron—Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method) GB/T 223.58-1987 Methods for chemical analysis of iron，steel and alloy--The extraction-absorption catalytic polarographic method for the determination of manganese content GB/T 9239.2-2025 Mechanical vibration—Rotor balancing—Part 2:Vocabulary QC/T 556-2023 Car brake temperature measurement method and thermocouple installation requirements GB/T 9239.11-2025 Mechanical vibration—Rotor balancing—Part 11:Procedures and tolerances for rotors with rigid behaviour