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Surface Finish & Applications
| Type |
Symbol |
Grade |
Dia(mm) |
Applications |
| S-CO |
WPA |
AISI 302,304,316 |
0.18-6.00 |
General Spring |
| WPB |
AISI 302,304 |
| WPC |
AISI 631J1 |
Ni-Co
(Nickel coating) |
WPA |
AISI 302,304,316 |
0.06~2.00 |
Precision coiling at high speed |
| WPB |
AISI 302,304 |
| Bright |
WPA |
AISI 302,304,316 |
0.06-6.00 |
Precise spring wire for good bright surface & forming processing work |
| WPB |
AISI 302,304 |
Mechanical Properties
| Dia(mm) |
Tolerance(mm) |
Tensile Strength N/mm2(kgf/mm2) |
AISI 302 - WPA
AISI 304 - WPA
AISI 316 - WPA |
AISI 302 - WPB
AISI 304 - WPB |
| 0.06 |
±0.005 |
1620-1870
(165 - 190) |
2160 - 2410
(220 - 245) |
| 0.08 |
| 0.10 |
| 0.12 |
| 0.15 |
| 0.16 |
| 0.18 |
| 0.20 |
±0.008 |
| 0.23 |
1570 - 1820
(160 - 185) |
2060 - 2310
(210 - 235) |
| 0.26 |
| 0.29 |
| 0.32 |
| 0.35 |
| 0.40 |
| 0.45 |
1960 - 2210
(200 - 225) |
| 0.50 |
±0.010 |
| 0.55 |
| 0.60 |
| 0.65 |
| 0.70 |
| 0.80 |
1470 - 1720
(150 - 175) |
1860 - 2110
(190 - 215) |
| 0.90 |
| 1.00 |
| 1.20 |
±0.015 |
1370 - 1620
(140 - 165) |
1770 - 2010
(180 - 205) |
| 1.40 |
| 1.60 |
1320 - 1570
(135 - 160) |
1670 - 1920
(170 - 195) |
| 1.80 |
| 2.00 |
±0.020 |
| 2.30 |
1280 - 1520
(130 - 155) |
1570 - 1820
(160 - 185) |
| 2.60 |
| 2.90 |
| 3.20 |
1180 - 1430
(120 - 145) |
1470 - 1720
(150 - 175) |
| 3.50 |
±0.030 |
| 4.00 |
| 5.00 |
| 6.00 |
Packing(Spool)
| Dia(mm) |
Packing (F X B X W : A) |
App. W/T(kg) |
| 0.06 ~ 0.15 |
Spool |
0.5 - 3 |
| 0.16 ~ 0.40 |
DIN 2000 |
12 |
| DIN 250 |
20 |
| 0.41 ~ 0.50 |
DIN 355 |
40 |
| 0.51 ~ 0.80 |
400 X 300 X 200 (60) |
50 |
| 450 X 300 X 240 (60) |
100 |
| 0.81 ~ 1.20 |
500 X 400 X 300 (60) |
100 |
| 600 X 400 X 390 (60) |
300 |
| 1.21 ~ 1.60 |
500 X 400 X 300 (60) |
100 |
| 600 X 400 X 390 (60) |
300 |
| 1.61 ~ 2.00 |
500 X 400 X 300 (60) |
100 |
| 600 X 400f X 390 (60) |
300 |
| 2.01 ~ 6.00 |
750 X 550 X 500 (130) |
500 |
Packing(Coil)
| Dia(mm) |
Coil I.D (Inch) |
App. W/T(kg) |
| 0.06 ~ 0.15 |
4 ~ 6 |
0.5 ~ 3 |
| 0.16 ~ 0.30 |
8 |
10 |
| 0.31 ~ 0.40 |
8 |
10 |
| 0.41 ~ 0.50 |
8 ~ 10 |
10 |
| 0.51 ~ 0.80 |
12 |
20 ~ 25 |
| 0.81 ~ 0.90 |
16 |
25 ~ 35 |
| 0.91 ~ 1.00 |
16 |
25 ~ 50 |
| 1.01 ~ 1.80 |
16 |
25 ~ 50 |
| 1.81 ~ 2.50 |
24 |
100 |
| 2.51 ~ 6.00 |
24 |
100 ~ 200 |
Cast & Helix(Pitch)
The most important thing to make high quality spring is how to control cast & helix. As our specifications are based on lots of customer's demands, we have ever made control of it as follows:
 |
Dia(mm) |
Coil I.D(Inch) |
Cast(mm) |
Helix(mm) |
| 0.06 ~ 0.15 |
4 ~ 6 |
160 ~ 250 |
30 under |
| 0.16 ~ 0.40 |
8 |
200 ~ 30 |
| 0.41 ~ 0.50 |
8 |
200 ~ 300 |
| 10 |
250 ~ 370 |
| 0.51 ~ 0.80 |
12 |
300 ~ 450 |
| 0.81 ~ 0.90 |
16 |
400 ~ 600 |
| 0.91 ~ 1.00 |
50 under |
| 1.01 ~ 1.80 |
| 1.81 ~ 2.50 |
24 |
600 ~ 900 |
60 under |
| 2.51 ~ 6.00 |
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