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Cold-heading wire for manufacture of fasteners is used in many fields and in extremely varying applications. Examples are the transport, building, chemical, electronics/computer and white goods sectors.
Product properties.
Optimum cold-heading properties place high demands on a controlled manufacturing of the wire. Surfaces free from defects, steel grades adapted to the product, tight compositional limits, low inclusion and impurity contents, correct mechanical properties, correct work-hardening rate, even adapted surface coatings and tight size tolerances are examples of important parameters. |
| Standard Steel grades | | Size, execution and tolerances |
| ASTM | Fagersta | Semifinished
Annealed & coated. | Adjust drawn
3-15% reduction |
| T430 | R250.11 | 1.5 - 12.5mm - h10 | 1.5 - 12mm - h9 |
| T302 | R320.14 | 1.5 - 12.5mm - h10 | 1.5 - 12mm - h9 |
| T302HQ | R575.11 | 1.5 - 12.5mm - h10 | 1.5 - 12mm - h9 |
| T304L | R350.20 | 1.5 - 12.5mm - h10 | 1.5 - 12mm - h9 |
| T304 | R350.10 | 1.5 - 12.5mm - h10 | 1.5 - 12mm - h9 |
| T321 | R359.10 | 1.5 - 12.5mm - h10 | 1.5 - 12mm - h9 |
| T305 | R390.21 | 1.5 - 12.5mm - h10 | 1.5 - 12mm - h9 |
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The figures below show a relative comparison of mechanical, corrosion and magnetic properties for different steels
Corrosion resistance and mechanical properties.
*Low Mo; **High Ni. |
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Corrosion resistance and headability
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*Low Mo; **High Ni. |
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Mechanical properties and magnetism.
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*Low Mo; **High Ni. |
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