Product : Cold Heading Wire

 


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.

MECHANICAL PROPERTIES

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
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

DIAMETER TOLERANCES AND OVALITY

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

In coils on formers placed on pallets

CLASSIFICATION

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