| CLASSIFICATION OF USE & STANDARD OF MATERIAL ACCORDING TO JIS-B2401 |
| TESTING ITEMS |
KINDS OF MATERIALS |
| 1 Grade A |
1 Grade B |
2 Grade |
3 Grade |
4 Grade C |
4 Grade D |
STATUS
|
HARDNESS |
70±5 |
90±5 |
70±5 |
70±5 |
70±5 |
70±5 |
| Min. TENSILE STRENGTH(kgf/㎠) |
100 |
150 |
100 |
100 |
35 |
100 |
| Min. ELONGATION(%) |
250 |
100 |
200 |
150 |
60 |
200 |
Min. TENSILE STRENGTH(kgf/㎠)100%
TIME TO ELONGATION |
28 |
- |
28 |
28 |
- |
20 |
AGING TEST |
TEMPERATURE AND TIME |
120℃ 70hr |
120℃ 70hr |
100℃ 70hr |
100℃ 70hr |
230℃ 70hr |
230℃ 70hr |
| Max. CHANGE OF HARDNESS(Hs) |
+10 |
+10 |
+10 |
+10 |
+10 |
+5 |
| Max. CHANGE RATIO OF
TENSILE STRENGTH(%) |
-15 |
-25 |
-15 |
-15 |
-10 |
-10 |
| Max. CHANGE RATIO ELONGATION |
-45 |
-55 |
-40 |
-45 |
-25 |
-25 |
COMPRESSIVE PERMANENT SHRINKAGE TEST
|
TEMPERATURE AND TIME |
120℃ 70hr |
120℃ 70hr |
100℃ 70hr |
100℃ 70hr |
175℃ 70hr |
175℃ 70hr |
| Max. COMPRESSIVE
SHRINKAGE RATIO(%) |
40 |
40 |
25 |
25 |
30 |
40 |
| OIL PROOF TEST |
TEMPERATURE, TIME,
AND TEST OIL |
120℃ 70hr Lube Oil No.1 |
120℃ 70hr Lube Oil No.1 |
Normal Temp.70hr Oil No.1 |
100℃ 70hr Brake Oil |
175℃ 70hr Lube Oil No.1 |
175℃ 70hr Lube Oil No.1 |
| Max. CHANGE OF HARDNESS |
-5~+8 |
-5~+8 |
-8~0 |
-15~0 |
-10~+5 |
-10~+5 |
| Max. CHANGE RATIO OF TENSILE STRENGTH |
-15 |
-20 |
-15 |
-40 |
-20 |
-20 |
| Max. CHANGE RATIO ELONGATION |
-40 |
-40 |
-25 |
-40 |
-20 |
-20 |
| CHANGE RATIO OF CUBAGE(%) |
-8~+5 |
-8~+5 |
-3~+5 |
0~+12 |
0~+10 |
-5~+5 |
| TEMPERATURE, TIME, AND TEST OIL |
120℃ 70hr Lube Oil No.3 |
120℃ 70hr
Lube Oil No.3 |
Normal Temp. 70hr Oil No.2 |
- |
- |
175℃ 70hr Lube Oil No.3 |
| CHANGE OF HARDNESS(Hs) |
-15~0 |
-10~+5 |
-20~0 |
- |
- |
-10~+5 |
| Max. CHANGE RATIO OF TENSILE STRENGTH(%) |
-25 |
-35 |
-45 |
- |
- |
-20 |
| Max. CHANGE RATIO ELONGATION |
-35 |
-35 |
-45 |
- |
- |
-20 |
| CHANGE RATIO OF CUBAGE(%) |
0~+20 |
0~+20 |
0~+30 |
- |
- |
-5~+5 |
