Mitutoyo HR-530 Series - Test Force (Rockwell;Rockwell Superficial Hardness Test

No. 99MBG518A
A-11
PART A : 4 Hardness Test Methods
4.1.3 TestForce(Rockwell/RockwellSupercialHardnessTest)
Hardness test Scale Indenter
Preliminary
test force
Total test force
N (kgf) N (kgf)
Rockwell
HRA
Diamond
98.07 (10)
588.4 (60)
HRD 980.7 (100)
HRC 1471 (150)
HRF
1/16" steel ball or carbide ball
588.4 (60)
HRB 980.7 (100)
HRG 1471 (150)
HRH
1/8" steel ball or carbide ball
588.4 (60)
HRE 980.7 (100)
HRK 1471 (150)
HRL
1/4" steel ball or carbide ball
588.4 (60)
HRM 980.7 (100)
HRP 1471 (150)
HRR
1/2" steel ball or carbide ball
588.4 (60)
HRS 980.7 (100)
HRV 1471 (150)
Rockwell
supercial
HR15N
Diamond
29.42 (3)
147.1 (15)
HR30N 294.2 (30)
HR45N 441.3 (45)
HR15T
1/16" steel ball or carbide ball
147.1 (15)
HR30T 294.2 (30)
HR45T 441.3 (45)
HR15W
1/8" steel ball or carbide ball
147.1 (15)
HR30W 294.2 (30)
HR45W 441.3 (45)
HR15X
1/4" steel ball or carbide ball
147.1 (15)
HR30X 294.2 (30)
HR45X 441.3 (45)
HR15Y
1/2" steel ball or carbide ball
147.1 (15)
HR30Y 294.2 (30)
HR45Y 441.3 (45)
These explanations are provided based on the descriptions of "JIS Z 2245: Rockwell hardness test –
Test method".
For details, see
"JIS Z 2245: Rockwell hardness test – Test method".