Spring Steel Wire
This steel wire, cold-processed from high-carbon and specially developed steels, offers excellent strength, hardness, and wear resistance.
It is used as a reliable material that delivers stable performance even under severe operating conditions, such as automotive springs (suspension springs, powertrain-related springs, seat springs), precision springs, and die springs.
Key Features
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Versatile Production Capabilities for a Wide Range of Products
Our heat treatment facilities include patenting equipment, oil tempering for quenching and tempering, and IT (induction hardening) equipment, enabling us to provide performance suitable for high-strength products. We also have rolling equipment for producing shaped wires, meeting diverse customer needs.
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Thorough Defect Control
From initial defect inspection upon raw material receipt to in-process defect detection systems and shaving treatments, we maintain rigorous defect management to ensure reliable wire products for our customers.
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Contributing to Weight Reduction
In collaboration with steel manufacturers, we can develop customized chemical compositions to achieve the desired strength levels. For example, we offer steels for suspension springs that combine high strength with improved resistance to delayed fracture.
Applications
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Automotive and Motorcycle Industry
Suspension springs, high-precision springs, seat springs, coil springs.
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Other Industries
Shutter springs and miniature springs, and other small spring components.
Product Specifications
| Steel Grade | Hard Steel Wire | Piano Wire | Oil Tempered Wire | |
|---|---|---|---|---|
| Applicable Public Standards | JIS | G3521 | G3522 |
G3560 G3561 |
| SAE | ー | ー | ー | |
| Non-standard / OEM Specifications | ー | SPS (Low Carbon Content) |
SRS60 (Sag Resistance) IT Wire (Induction Hardened Wire) MSOT Wire |
|
| Cross-Section Shape |
Round Wire (Size Range) |
⚪︎ （0.7〜13.0） |
⚪︎ （0.7〜13.0） |
⚪︎ （IT：10.7〜17.0） |
| Shaped Wire | ⚪︎ | ー | ⚪︎ | |
| Surface Treatment | Lime Coating | ー | ー | ー |
| Zinc Phosphate Coating | ー | ー | ー | |
| Non-Phosphated Coating | ー | ー | ー | |
| Heat Treatment | Annealing | ⚪︎ | ー | ー |
| Patenting | ⚪︎ | ⚪︎ | ー | |
| Quenching and Tempering | ー | ー | ⚪︎ | |
