Webster hardness test of metal materials

The Webster hardness test of metal materials refers to a hard steel indenter of a certain shape that is pressed into the surface of the sample under the action of a standard spring test force. The indentation depth of the indenter is used to determine the material hardness. The indentation depth of 0.01mm is defined as a Webster hardness unit. The unit of Webster hardness is expressed as HW. The Webster hardness instrument is portable, small in size, light in weight, and can be operated with one hand. It can test the hardness of materials quickly, conveniently, and non-destructively. It does not require sampling and does not require high operating skills. It is very suitable for rapid hardness testing of materials at the production site. Zhongke Testing Reliability Experiment Center has the capabilities of environmental testing and reliability performance testing of various metal materials, and provides professional Webster hardness testing services for metal materials.

Brinell hardness application range: testing steel, cast iron, non-ferrous alloys, etc. in various annealed states, and also used to test mechanical parts that have been quenched and tempered and have a hardness less than HBW650.

1. Press a steel indenter with a specified shape into the surface of the sample under a certain test force. The depth of the indenter is used to represent the hardness of the material. The indentation depth of 0.0125mm is defined as a Webster hardness unit. The hardness of the material is related to the depth of indentation. The shallower the indentation, the higher the hardness, and vice versa. The expression is as follows:
HW=20-L/0.0125
HW—Webster hardness symbol;
L—The depth of the indenter pressing into the specimen, in millimeters (mm).
2. When using type A hardness tester to test aluminum alloy, it is represented by HWA. When using type B hardness tester to test copper alloy and mild steel, it is represented by HWB. When using type C hardness tester to test pure copper, it is represented by HWC. The value before the symbol is the hardness value. When using an A-type hardness tester to test aluminum alloys, the A in the hardness symbol HWA can be omitted and can be expressed as HW.

GB/T 32660.1-2016 Metallic materials Webster hardness test Part 1: Test method
YS/T 420-2000 Webster hardness test method for aluminum alloy
GB/T 32660.1-2016 Metallic materials Webster hardness test Part 2: Inspection and calibration of hardness tester
GB/T 32660.1-2016 Metallic Materials Webster Hardness Test Part 3: Calibration of Standard Hardness Block