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| SKM’s Cold Heading Wires are manufactured using a special heat treatment, copper-bearing austentic steel 302CHQ, 304HQ, Normal 304 and 430 are also used for cold heading fasteners. |
| SPECIAL CHARACTERISTICS |
| Excellent corrosion resistance and mechanical strength and the most suitable material for bolts, screws and other fasteners. These wires possess remarkable work-hardening characteristics. |
| SUPPLY CONDITIONS |
| All SKM wires are coated to ensure smooth heading operations condition. Available in Cold Drawn and Annealed, Cold Drawn, Annealed and Skin Pass or as per customer requirement with very fine tolerance. |
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| MECHANICAL PROPERTIES |
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Annealed finish |
Light drawn |
| Type |
Grade |
Tensile Strength
N/mm2(kgf/mm) |
Elongation
(%) |
Reduction of area rate(%) |
Tensile Strength
N/mm2
(kgf/mm) |
Elongation
(%) |
Reduction
area rate(%) |
| Austenite |
AISI
304/316 |
490 - 740
(60 - 75) |
40 over |
70 over |
650 - 800
(66-81) |
25 |
65 |
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AISI
302HQ |
440-590
(45-60) |
40 over |
70 over |
460-640
(47-65) |
25 |
65 |
| Ferrite |
AISI
430 |
40 - 55 |
20 over |
65 over |
460-640
(47-65) |
10 |
60 |
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| DIAMETER TOLERANCES AND OVALITY |
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| Dia (mm) |
Tolerance
(mm) |
Ovality
(mm) |
| 0.80-1.90 |
+0.00-0.02 |
0.010 |
| 2.00-3.50 |
+0.00-0.03 |
0.015 |
| 3.51-8.00 |
+0.00-0.04 |
0.020 |
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| In coils on formers placed on pallets |
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| CLASSIFICATION |
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| Type |
Grade |
Diameter(mm) |
Surface finish |
| Austenite |
AISI 304
AISI 302HQ |
0.80 – 8.00 |
Bright De-coated wire or sterate coated |
| AISI 316 |
0.80 – 8.00 |
| Ferrite |
AISI 430 |
0.80 – 8.00 |
Bright De-coated wire or sterate coated |
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