标尺

标准块的硬度范围

示值最大允许误差

HRA

(20-75)HRA

±2HRA

(>75-88)HRA

±1.5HRA

HRB

(20-45)HRB

±4HRB

(>45-80)HRB

±3HRB

(>80-100)HRB

±2HRB

HRC

(20-70)HRC

±1.5HRC

HRD

(40-70)HRD

±2HRD

(>70-77)HRD

±1.5HRD

HRE

(70-90)HRE

±2.5HRE

(>90-100)HRE

±2HRE

HRF

(60-90)HRF

±3HRF

(>90-100)HRF

±2HRF

HRG

(30-50)HRG

±6HRG

(>50-75)HRG

±4.5HRG

(>75-94)HRG

±3HRG

HRH

(80-100)HRH

±2HRH

HRK

(40-60)HRK

±4HRK

(>60-80)HRK

±3HRK

(>80-100)HRK

±2HRK

HRL

(100-120)HRL

±1.2HRL

HRM

(85-110)HRM

±1.5HRM

HRR

(114-125)HRR

±1.2HRR

硬度符号

硬度计示值的最大允许误差（±%）

硬度,HV

50

100

150

200

250

300

350

400

450

500

600

700

800

900

1000

HV0.05

6

8

9

10

HV0.1

5

6

7

8

8

9

10

10

11

HV0.2

4

6

8

9

10

11

11

12

12

HV0.3

4

5

6

7

8

9

10

10

11

11

HV0.5

3

5

5

6

6

7

7

8

8

9

HV1

3

4

4

4

5

5

5

6

6

6

HV2

3

3

3

4

4

4

4

4

5

5

HV3

3

3

3

3

3

4

4

4

4

4

HV5

3

3

3

3

3

3

3

3

3

4

HV10

3

3

3

3

3

3

3

3

3

3

HV20

3

3

3

3

3

3

3

3

3

3

HV30

3

3

2

2

2

2

2

2

2

2

HV50

3

3

2

2

2

2

2

2

2

2

HV100

3

2

2

2

2

2

2

2

2

注：                                                                                        1.当压痕对角线长度小于0.02mm时，表中未给出值.                                               2.对于中间值，其最大允许误差可通过内插法求得.                                                  3.表中有关显微硬度计的值是以0.001mm或压痕对角线长度平均值2%为最大允许误差给出的.比较大者为准.

硬度范围（HBW)

示值最大允许误差δ%

表示值重复性Hcf/%

≦125

±3

≤3.5

125＜HBW≤225

±2.5

≤3.0

＞225

±2

≤2.5