Hardness Scale |
Hardness Range of The Standard Testing Blocks |
The Max. Tolerance of Hardness Display Value |
HRA | 20~≤75HRA | ±2HRA |
>75~≤88HRA | ±1.5HRA | |
HRB |
20~≤45HRB | ±4HRB |
>45~≤80HRB | ±3HRB | |
>80~≤100HRB | ±2HRB | |
HRC | 20~≤70HRC | ±1.5HRC |
Hardness Value of Standard Testing Blocks (HBW) |
Tolerance of Displayed Value (%) |
Repetition of Displayed Value (%) |
≤125 | ±3 | ≤3 |
125<HBW≤125 | ±2.5 | ≤2.5 |
>225 | ±2 | ≤2 |
Tolerance of Displayed Value | Repetition of Displayed Value | |||
Hardness Scale |
Displayed Value of Hardness Test Block |
Tolerance of Displayed Value |
Displayed Value of Hardness Test Block |
Repetition of Displayed Value |
HV30 HV100 |
≤250HV | ±3% | ≤225HV | 6% |
300~1000HV | ±2% | >225HV | 4% |
No. | Description of Goods | Quantity |
1 | Diamond Rockwell Indenter | 1 PC |
2 | ф1.5875mm Ball Indenter | 1 PC |
3 | Large Testing Table; Medium Testing Table; “V” Shaped Testing Table | Total 3 PCS |
4 | Standard Rockwell Hardness Block: | |
HRC ( High); HRC(Lower); HRB | Each 1 PC | |
5 | Weight 0, 1, 2, 3, 4 | Total 5 PCS |
6 | Power Cord | 1 PC |
7 | Fuse 2A | 2 PCS |
8 | Level | 1 PC |
9 | Horizontal Regulating Screw | 4 PCS |
10 | Screwdriver; Spanner | Each 1 PC |
11 | Nylon Anti-dust Bag | 1 PC |
12 | Instruction Manual | 1 PC |
13 | Check List of Vickers Hardness | 1 PC |
14 | Check List of Brinell Hardness | 1 PC |
No. | Description of Goods | Quantity |
1 | Seat of Microscope (with Inside Light) | 1 PC |
2 | Eyepiece | 1 PC |
3 | 2.5╳ Objective | 1 PC |
4 | 5╳ Objective | 1 PC |
5 | Slipped Testing Table | 1 PC |
6 | Outside Light | 1 PC |
7 | Diamond Vickers Indenter | 1 PC |
8 | ф2.5mm, ф5mm Ball Indenter | Total 2 PCS |
9 | Standard Vickers Hardness Block(HV30) | 1 PC |
10 | Standard Brinell Hardness Block(HBW/2.5/187.5) | 1 PC |