Key Equipment
| Category |
AR |
BA |
| Thickness |
Width |
Thickness |
Width |
| Precision Wide-Width |
0.08 ~ 1.20 |
20 ~ 1,300 |
0.10 ~ 1.50 |
20 ~ 1,300 |
| Category |
AR |
| Thickness |
Width |
| Precision Wide-Width |
0.08 ~ 1.20 |
20 ~ 1,300 |
| Category |
BA |
| Thickness |
Width |
| Precision Wide-Width |
0.10 ~ 1.50 |
20 ~ 1,300 |
* AR : As Rolled / * BA : Bright Annealed
[Unit: mm]
Thickness Tolerance
| Thickness |
Tolerance |
| T ≤ 0.15 |
+/-6.0% |
| 0.15 ≤ T |
+/-5.0% |
* Tolerances outside the above ranges are available upon separate agreement.
[Unit: mm]
Mechanical Properties of Strip Steel for Springs
| Steel Grade |
Temper Designation |
Symbol |
Hardness [HV] |
Yield Strength [N/mm²] |
Tensile Strength [N/mm²] |
| 304 |
1 / 2H |
2H |
250 ↑ |
470 ↑ |
780 ↑ |
| 3/4H |
3H |
310 ↑ |
665 ↑ |
930 ↑ |
| H |
FH |
370 ↑ |
880 ↑ |
1,130 ↑ |
| 301 |
1 / 2H |
2H |
310 ↑ |
510 ↑ |
930 ↑ |
| 3 / 4 |
3H |
370 ↑ |
745 ↑ |
1,130 ↑ |
| H |
FH |
430 ↑ |
1,030 ↑ |
1,320 ↑ |
| EH |
EH |
490 ↑ |
1,275 ↑ |
1,570 ↑ |
| Steel Grade |
304 |
| Temper Designation |
1 / 2H |
3/4H |
H |
| Symbol |
2H |
3H |
FH |
| Hardness [HV] |
250 ↑ |
310 ↑ |
370 ↑ |
| Yield Strength [N/mm²] |
470 ↑ |
665 ↑ |
880 ↑ |
| Tensile Strength [N/mm²] |
780 ↑ |
930 ↑ |
1,130 ↑ |
| Steel Grade |
301 |
| Temper Designation |
1 / 2H |
3/4H |
H |
EH |
| Symbol |
2H |
3H |
FH |
EH |
| Hardness [HV] |
310 ↑ |
370 ↑ |
430 ↑ |
490 ↑ |
| Yield Strength [N/mm²] |
510 ↑ |
745 ↑ |
1,030 ↑ |
1,275 ↑ |
| Tensile Strength [N/mm²] |
930 ↑ |
1,130 ↑ |
1,320 ↑ |
1,570 ↑ |
* Hardness can be controlled within ±15 of the specified target hardness.
[Unit: mm]
