Mẫu chuẩn đo độ cứng YAMATOMO (Standard block for hardness)
|
Rockwell Blocks |
Diameter |
Nominal Hardness Values |
Variation |
NIST Traceable |
|
HRA |
64mm |
56, 65, 71, 75, 78, 81, 83, 85, 87 |
+/-0.3 |
No |
|
HRB |
64mm |
32, 42, 52 |
+/-0.5 |
No |
|
HRB |
64mm |
62, 72, 82, 90, 95, 100 |
+/-0.4 |
No |
|
HRC |
64mm |
10, 20, 25, 30, 35, 40 |
+/-0.15 |
Yes |
|
HRC |
64mm |
45, 50, 55, 60, 62, 64, 67, 70 |
+/-0.1 |
Yes |
|
HR15N |
64mm |
75, 80, 85, 87, 90, 92 |
+/-0.45 |
No |
|
HR30N |
64mm |
41, 50, 60, 67, 73, 78, 81, 83 |
+/-0.5 |
No |
|
HR15T |
64mm |
78, 82, 87 |
+/-0.5 |
No |
|
HR30T |
64mm |
32, 42, 52, 62, 72, 78 |
+/-0.5 |
No |
|
HRE |
64mm |
90 |
+/-0.5 |
No |
|
HRL |
64mm |
92, 118 |
+/-0.5 |
No |
|
HRM |
64mm |
67, 107 |
+/-0.5 |
No |
|
HRR |
64mm |
105, 123 |
+/-0.5 |
No |
|
Rockwell Blocks |
Diameter |
Nominal Hardness Values |
Variation |
NIST Traceable |
|
HRC |
51mm |
20, 25, 30, 35, 40, 45 |
+/-0.15 |
No |
|
HRC |
51mm |
50, 55, 60, 62, 64, 67 |
+/-0.5 |
No |
|
Brinell Blocks |
Diameter |
Nominal Hardness Values |
Variation |
NIST Traceable |
|
HBW30 |
115mm |
150, 180, 200, 229, 250, 300, 350 |
+/-0.7% |
No |
|
HBW5 |
115mm |
100, 125 |
+/-0.7% |
No |
|
Vickers Blocks |
Diameter |
Nominal Hardness Values |
Variation |
NIST Traceable |
|
HV |
25mm |
100, 200, 300, 400, 500, 600, 700 |
+/-2.5% |
No |