Piano Wire
High-Carbon Steel
Piano Wire
Piano wire rod is a high-carbon steel with excellent high strength and fatigue resistance. It is mainly used for high-strength tire reinforcements, bridge cables, and PC steel wires. It is a high-carbon clean steel with excellent drawability, high strength, and fatigue resistance.
Usage
- It is used as a high-end spring with a dynamic load mainly on the engin evalve springs, brake springs, clutch springs and compressor springs of real devices, electronic communication devices, automobiles, using 0.6 to 0.9% carbon content.
Type and Wire Diameter
| Specification | Type | Purduction symbol |
|---|---|---|
| Piano 1 | PW-1 | Spring under mainly moving loads |
| Piano 2 | PW-2 |
Tensile Strength / Diameter tolerance / Ovality / Surface
| Diameter (mm) | Tensile Strength | Diameter tolerance/Ovality/Surface | Tensile Strength | Diameter tolerance/Ovality/Surface | |||||
|---|---|---|---|---|---|---|---|---|---|
| PW-1 (SWP-A : JIS) N/mm² |
PW-2 (SWP-B : JIS) N/mm² |
Diameter tolerance (mm) | Ovality (mm/Max.) | Surface |
PW-3(SWP-B : JIS) | Diameter tolerance(mm) | Ovality (mm/Max.) | Surface | |
| 0.50 | 2,300 ~ 2,550 | 2,500 ~ 2,790 |
±0.008 | 0.008 | GOOD | - | - | - | - |
| 0.55 | 2,260 ~ 2,500 | 2,500 ~ 2,750 | ±0.010 | 0.010 | GOOD | - | - | - | - |
| 0.60 | 2,210 ~ 2,450 | 2,450 ~ 2,700 | ±0.010 | 0.010 | GOOD | - | - | - | - |
| 0.65 | 2,210 ~ 2,450 | 2,450 ~ 2,700 | ±0.010 | 0.010 | GOOD | - | - | - | - |
| 0.70 | 2,160 ~ 2,400 | 2,400 ~ 2,650 | ±0.010 | 0.010 | GOOD | - | - | - | - |
| 0.80 | 2,110 ~ 2,350 | 2,350 ~ 2,600 | ±0.010 | 0.010 | GOOD | - | - | - | - |
| 0.90 | 2,110 ~ 2,300 | 2,300 ~ 2,500 | ±0.010 | 0.010 | GOOD | - | - | - | - |
| 1.00 | 2,060 ~ 2,260 | 2,260 ~ 2,450 | ±0.010 | 0.010 | GOOD | 2,010 ~ 2,210 | ±0.010 | 0.010 | GOOD |
| 1.20 | 2,010 ~ 2,210 | 2,210 ~ 2,400 | ±0.015 | 0.015 | GOOD | 1,960 ~ 2,160 | ±0.015 | 0.015 | GOOD |
| 1.40 | 1,960 ~ 2,160 | 2,160 ~ 2,350 | ±0.015 | 0.015 | GOOD | 1,910 ~ 2,110 | ±0.015 | 0.015 | GOOD |
| 1.60 | 1,910 ~ 2,110 | 2,110 ~ 2,300 | ±0.015 | 0.015 | GOOD | 1,860 ~ 2,060 | ±0.015 | 0.015 | GOOD |
| 1.80 | 1,860 ~ 2,060 | 2,060 ~ 2,260 | ±0.015 | 0.015 | GOOD | 1.810 ~ 2,010 | ±0.015 | 0.015 | GOOD |
| 2.00 | 1,810 ~ 2,010 | 2,010 ~ 2,210 | ±0.015 | 0.015 | GOOD | 1,770 ~ 1.910 | ±0.015 | 0.015 | GOOD |
| 2.30 | 1,770 ~ 1,960 | 1,960 ~ 2,160 | ±0.020 | 0.020 | GOOD | 1,720 ~ 1,860 | ±0.020 | 0.020 | GOOD |
| 2.60 | 1,770 ~ 1,960 | 1,960 ~ 2,160 | ±0.020 | 0.020 | GOOD | 1,720 ~ 1,860 | ±0.020 | 0.020 | GOOD |
| 2.90 | 1,720 ~ 1,910 | 1,910 ~ 2,110 | ±0.020 | 0.020 | GOOD | 1,720 ~ 1,860 | ±0.020 | 0.020 | GOOD |
| 3.20 | 1,670 ~ 1,860 | 1,860 ~ 2,060 | ±0.020 | 0.020 | GOOD | 1.670 ~ 1.810 | ±0.020 | 0.020 | GOOD |
| 3.50 | 1,670 ~ 1,810 | 1,810 ~ 1,960 | ±0.030 | 0.030 | GOOD | 1.670 ~ 1.810 | ±0.030 | 0.030 | GOOD |
| 4.00 | 1,670 ~ 1,810 | 1,810 ~ 1,960 | ±0.030 | 0.030 | GOOD | 1.670 ~ 1.810 | ±0.030 | 0.030 | GOOD |
| 4.50 | 1,620 ~ 1,770 | 1,770 ~ 1,910 | ±0.030 | 0.030 | GOOD | 1.620 ~ 1.770 | ±0.030 | 0.030 | GOOD |
| 5.00 | 1,620 ~ 1,770 | 1,770 ~ 1,910 | ±0.030 | 0.030 | GOOD | 1.620 ~ 1.770 | ±0.030 | 0.030 | GOOD |
| 5.50 | 1,570 ~ 1,710 | 1,710 ~ 1,860 | ±0.030 | 0.030 | GOOD | 1.570 ~ 1.720 | ±0.030 | 0.030 | GOOD |
| 6.00 | 1,520 ~ 1,670 | 1,670 ~ 1,810 | ±0.040 | 0.040 | GOOD | 1,520 ~ 1,670 | ±0.040 | 0.040 | GOOD |
| 6.50 | 1,520 ~ 1,670 | 1,670 ~ 1,810 | ±0.040 | 0.040 | GOOD | - | - | ||
| 7.00 | 1,470 ~ 1,620 | 1,620 ~ 1,770 | ±0.040 | 0.040 | GOOD | - | - | ||
| 8.00 | 1,470 ~ 1,620 | - | - | - | - | - | - | - | |
| 9.00 | 1,420 ~ 1,570 | - | - | - | - | - | - | - | |
| 10.00 | 1,420 ~ 1,570 | - | - | - | - | - | - | - | |
Torsion / Wind up / Bending / Depth of blemish / Decarburized layer
PW-1 (SWP-A : JIS)
| Diameter (mm) | PW-1 (SWP-A : JIS) | |||||
|---|---|---|---|---|---|---|
| Number of Torsion (Min) | Torsional Appearance | Wind up | Bending | Depth of blemish mm (Max) | Decarburized layer mm (Max) | |
| 0.50 | – | – | GOOD | – | – | – |
| 0.55 | – | – | GOOD | – | – | – |
| 0.60 | – | – | GOOD | – | – | – |
| 0.65 | – | – | GOOD | – | – | – |
| 0.70 | 25 | GOOD | – | – | – | ZERO |
| 0.80 | 25 | GOOD | – | – | – | ZERO |
| 0.90 | 25 | GOOD | – | – | – | ZERO |
| 1.00 | 25 | GOOD | – | – | 0.02 | ZERO |
| 1.20 | 25 | GOOD | – | – | 0.02 | ZERO |
| 1.40 | 25 | GOOD | – | – | 0.02 | ZERO |
| 1.60 | 25 | GOOD | – | – | 0.02 | ZERO |
| 1.80 | 25 | GOOD | – | – | 0.02 | ZERO |
| 2.00 | 25 | GOOD | – | – | 0.02 | ZERO |
| 2.30 | 20 | GOOD | – | – | 0.03 | ZERO |
| 2.60 | 20 | GOOD | – | – | 0.03 | ZERO |
| 2.90 | 20 | GOOD | – | – | 0.03 | ZERO |
| 3.20 | 20 | GOOD | – | – | 0.04 | ZERO |
| 3.50 | 20 | GOOD | – | – | 0.04 | ZERO |
| 4.00 | 15 | GOOD | – | – | 0.04 | ZERO |
| 4.50 | 15 | GOOD | – | – | 0.05 | ZERO |
| 5.00 | 15 | GOOD | – | – | 0.05 | ZERO |
| 5.50 | 15 | GOOD | – | – | 0.06 | ZERO |
| 6.00 | 15 | GOOD | – | – | 0.06 | ZERO |
| 6.50 | – | – | – | GOOD | 0.07 | ZERO |
| 7.00 | – | – | – | GOOD | 0.07 | ZERO |
| 8.00 | – | – | – | GOOD | 0.07 | ZERO |
| 9.00 | – | – | – | GOOD | 0.08 | ZERO |
| 10.00 | – | – | – | GOOD | 0.08 | ZERO |
PW-2 (SWP-B : JIS)
| Diameter (mm) | PW-2 (SWP-B : JIS) | |||||
|---|---|---|---|---|---|---|
| Number of Torsion (Min) | Torsional Appearance | Wind up | Bending | Depth of blemish mm (Max) | Decarburized layer mm (Max) | |
| 0.50 | – | – | GOOD | – | – | – |
| 0.55 | – | – | GOOD | – | – | – |
| 0.60 | – | – | GOOD | – | – | – |
| 0.65 | – | – | GOOD | – | – | – |
| 0.70 | 25 |
GOOD | – | – | – | ZERO |
| 0.80 | 25 | GOOD | – | – | – | ZERO |
| 0.90 | 25 | GOOD | – | – | – | ZERO |
| 1.00 | 25 | GOOD | – | – | 0.02 | ZERO |
| 1.20 | 25 | GOOD | – | – | 0.02 | ZERO |
| 1.40 | 25 | GOOD | – | – | 0.02 | ZERO |
| 1.60 | 25 | GOOD | – | – | 0.02 | ZERO |
| 1.80 | 25 | GOOD | – | – | 0.02 | ZERO |
| 2.00 | 25 | GOOD | – | – | 0.02 | ZERO |
| 2.30 | 20 |
GOOD | – | – | 0.03 | ZERO |
| 2.60 | 20 | GOOD | – | – | 0.03 | ZERO |
| 2.90 | 20 | GOOD | – | – | 0.03 | ZERO |
| 3.20 | 20 | GOOD | – | – | 0.04 | ZERO |
| 3.50 | 20 | GOOD | – | – | 0.04 | ZERO |
| 4.00 | 15 | GOOD | – | – | 0.04 | ZERO |
| 4.50 | 15 | GOOD | – | – | 0.05 | ZERO |
| 5.00 | 15 | GOOD | – | – | 0.05 | ZERO |
| 5.50 | 15 | GOOD | – | – | 0.06 | ZERO |
| 6.00 | 15 | GOOD | – | – | 0.06 | ZERO |
| 6.50 | – | – | – | GOOD | 0.07 | ZERO |
| 7.00 | – | – | – | GOOD | 0.07 | ZERO |
| 8.00 | – | – | – | – | 0.07 | – |
| 9.00 | – | – | – | – | 0.08 | – |
| 10.00 | – | – | – | – | 0.08 | – |
PW-3 (SWP-C : JIS)
| Diameter (mm) | PW-3 (SWP-C : JIS) | |||||
|---|---|---|---|---|---|---|
| Number of Torsion (Min) | Torsional Appearance | Wind up | Bending | Depth of blemish mm (Max) | Decarburized layer mm (Max) | |
| 0.50 | – | – | – | – | ||
| 0.55 | – | – | – | – | ||
| 0.60 | – | – | – | – | ||
| 0.65 | – | – | – | – | ||
| 0.70 | – | – | – | – | ||
| 0.80 | – | – | – | – | ||
| 0.90 | – | – | – | – | ||
| 1.00 | 25 |
GOOD | 0.01 | 0.02 | ||
| 1.20 | 25 | GOOD | 0.01 | 0.02 | ||
| 1.40 | 25 | GOOD | 0.01 | 0.02 | ||
| 1.60 | 25 | GOOD | 0.01 | 0.02 | ||
| 1.80 | 25 | GOOD | 0.01 | 0.03 | ||
| 2.00 | 25 |
GOOD | 0.01 | 0.03 | ||
| 2.30 | 25 | GOOD | 0.02 | 0.03 | ||
| 2.60 | 25 | GOOD | 0.02 | 0.04 | ||
| 2.90 | 25 |
GOOD | 0.02 | 0.04 | ||
| 3.20 | 25 | GOOD | 0.02 | 0.05 | ||
| 3.50 | 25 | GOOD | 0.02 | 0.05 | ||
| 4.00 | 25 | GOOD | 0.02 | 0.05 | ||
| 4.50 | 25 |
GOOD | 0.03 | 0.05 | ||
| 5.00 | 25 | GOOD | 0.03 | 0.05 | ||
| 5.50 | 25 | GOOD | 0.03 | 0.05 | ||
| 6.00 | 25 | GOOD | 0.03 | 0.05 | ||
| 6.50 | – | – | – | – | ||
| 7.00 | – | – | – | – | ||
| 8.00 | – | – | – | – | ||
| 9.00 | – | – | – | – | ||
| 10.00 | – | – | – | – | ||
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