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試験装置 Daekyung DTR-300NのPDF 操作マニュアルをオンラインで閲覧またはダウンロードできます。Daekyung DTR-300N 15 ページ。 Rockwell hardness tester

9.2 Reference Table 2.

Calibration value when a cylinder-shaped specimen is tested as C, A, D scales
1/4"
Measured
(6.4mm)
Hardness
Calibration value (Actual hardness = Measured hardness + Calibration value)
20
6.0
25
5.5
30
5.0
35
4.0
40
3.5
45
3.0
50
2.5
55
2.0
60
1.5
65
1.5
70
1.0
75
1.0
80
0.5
85
0.5
90
0.5
3/8"
1/2"
5/8"
(10mm)
(13mm)
(16mm)
4.5
3.5
2.5
4.0
3.0
2.5
3.5
2.5
2.0
3.0
2.0
1.5
2.5
2.0
1.5
2.0
1.5
1.0
2.0
1.5
1.0
1.5
1.0
1.0
1.0
1.0
0.5
1.0
1.0
0.5
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0
0
DAEKYUNG TECH & TESTERS Mfg. CO.,LTD
Cylinder Diameter
3/4"
7/8"
(19mm)
(22mm)
2.0
1.5
2.0
1.5
1.5
1.5
1.5
1.0
1.0
1.0
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0
0
0
0
0
0
0
1 "
1 1/4"
1 1/2"
(25mm)
(32mm)
(38mm)
1.5
1.0
1.0
1.0
1.0
1.0
1.0
1.0
0.5
1.0
0.5
0.5
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0
0.5
0
0.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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