Standard Blocks for Hardness
HMV | JIS B 7735 |
UMV | JIS B 7735 |
HN-W | JIS B 7735 |
HV | JIS B 7735 |
HS | JIS B 7731 |
HL | JIS B 7731 |
HR C | JIS B 7730 |
HR A | |
HR30N | |
HR15N | |
HR45N | |
HRB W | JIS B 7730 |
HR30T | |
HR15T | |
HREW | JIS K 7202 |
HRMW | |
HRLW | |
HRRW | |
HRFW | |
HRSW | |
HBW | JIS B 7736 |
YC-Charpy V-Notch Test Blocks
Type A | 30J | Five pcs. for each types |
Type B | 100J | |
Type C | 160J |
※ Satisfies JIS B 7740 & ISO
Standard Microstructure
Group 1 | Ferrous-Carbon Steel ・ Cast Iron | 25Types |
Group 2 | Alloy Tool Steel ・ High Speed Steel | 25Types |
Group 3 | Structural Alloy Steel ・ Steel for Special uses | 25Types |
Group 4 | Standard Microstructure ・ Non-ferrous Alloy | 25Types |
Group 6 | Standard Microstructure ・ Surface modification of Metals | 25Types |
Group 7 | Standard Microstructure ・ Abnormal Structure | 23Types |
Standard Piece Sets of JIS Steel Materials
Group for Educational Applications | Group K |
Group for Specialized Applications | Carbon Steel Group F |
Tool Steel Group G | |
Structural & Special Steel Group H |
Hardnester
Hardnester | for general use | for precision tools | |
Rockwell “C” 8 Hardness Set | Vickers 8 Hardness Set | Vickers 16 Hardness Set | |
No. Ⅰ | HRC 20 | HV 200 | HV 200-250 |
No. Ⅱ | HRC 30 | HV 300 | HV 300-350 |
No. Ⅲ | HRC 40 | HV 400 | HV 400-450 |
No. Ⅳ | HRC 50 | HV 500 | HV 500-550 |
No. Ⅴ | HRC 55 | HV 600 | HV 600-650 |
No. Ⅵ | HRC 60 | HV 700 | HV 700-750 |
No. Ⅶ | HRC 65 | HV 800 | HV 800-850 |
No. Ⅷ | HRC 67 | HV 900 | HV 900-950 |