This standard specifies the heat treatment equipment, process, process materials, process control and quality inspection of high t

This standard specifies the heat treatment equipment, process and quality inspection methods for grey iron castings. JB/T 7711-199

This standard specifies the microstructure rating of the surface and core of thin-layer carbonitriding or thin-layer carburized st

This standard specifies the test methods for the microstructure, hardness and depth of the boronized layer. This standard is appli

This standard specifies the ball milling test method for the thickness of ion-plated hard films. This standard is applicable to va

This standard specifies the tools, methods, quality evaluation, and coating environment, sanitation, and safety requirements for b

This standard specifies the method for measuring the polarization curve of electroplating solutions. This standard is applicable t

This standard specifies the test method for the leveling performance of electroplating solutions. This standard is applicable to e