Webster Hardness Tester for Aluminum Alloy A portable instrument which can perform on-site hardness test on soft metals in accordance with American Standard ASTM B647. Used to check the result of heat treatment and determine if the mechanical performance of the workpiece is acceptable. Suitable for testing the hardness of aluminum profiles, tubings, sheets and other shapes. Used for testing the with long or heavy workpieces or assemblies inconvenient to be sent to the labs. Ideal for qualification inspection on the production site. used to test aluminum profiles. Main Technical Parameters Application W-20,W-20a and W-20b are used to test aluminum profiles on the production site and application. Standard Package Tester Standard hardness block Calibration wrench Spare indenter Small screwdriver Carrying case Optional Accessories Standard hardness blocks Spare indenter Calibration wrench Dial Glass Spare dial head Model Selection Product Photo