1, stable functions. 2, high quality and easy use. 3. easy maintain.
Technical specifications
1. The initial test force: 29.42N (3kg); Tolerance: ±2.0%
2. The total test force: 147.1N (15kg), 294.2N (30kg), 441.3N (45kg); Tolerance: ±1.0%
3. The specifications of the indenter:
3.1 Diamond Rockwell indenters
3.2 Ball indenters φ1.5875mm
4. The max height of the specimens: 175mm
5. The distance from the center of the indenter to the instrument body: 165mm
6. The total dimension of the tester: 520×215×700 (mm)
7. The total weight of the tester: 73kg
8. The allowed tolerances of the indicated values of the hardness tester
Scale | Hardness of Standard Blocks | Display Tolerance |
15N | (70~94) HR 15N | ±2 HRN |
30N | (42~86) HR 30N | |
45N | (20~77) HR 45N | |
15T | (67~93) HR 15T | ±3 HRT |
30T | (29~82) HR 30T | |
45T | (10~72) HR 45T |
9. The Scales, Indenters, Test Force Values and Application Fields of the Superficial Rockwell Hardness Tests.
Scale | Indenter Type | Initial Test Force | Total Test Force(N) | Applications |
| HR15N | Diamond Indenter | 29.42 N (3kg) | 147.1(15) | Hard alloy steel, nitride steel, carburized steel, various heavy steel plate, etc |
HR30N | 294.2(30) | Surface-quenched steel, carburized steel, knife, thin steel plate, etc | ||
| HR45N | 441.3(45) | Quenched steel, tempered steel,hard cast iron and edge of parts, etc | ||
HR15T | Ball Indenter φ1.5875mm(1/16 inch) | 147.1(15) | Annealed copper alloy, brass,bronze plate, mild steel sheet | |
| HR30T | 294.2(30) | Mild steel sheet, aluminum alloy, copper alloy, brass and bronze, malleable cast iron, | ||
HR45T | 441.3(45) | Pearlite iron, copper -nickel alloy and zinc-nickel alloy plate |
Superficial Rockwell Hardness Tester
