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Applications
In conjunction with some of Australia’s leading
sheeting and cladding material manufacturers there is
a specific program to test Stainless Steel and Class
4 screws in various materials. The severe conditions
encountered at both King Island and Newcastle sites
are ideal testing grounds for Stainless Steel screws
installed into various materials.
Stainless corrugated sheeting attached to galvanised
beams on an open test rig at Newcastle. Screws used
Stainless Teks® and Taptites in grade 304 and 316.
Test period 16 months.
Ampelite Webglas GC® sheeting attached to galvanised
beams on a sheltered test rig at our Newcastle site.
Taptite screw in Stainless grade 304, 316 and Martensitic
self-drilling screws, all parts were assembled with
stainless plates and EPDM washers. Test period was 30
months.
Results from this test and actual job site use of Martensitic
screws have made us aware of hardness problems when
using these products in crest fixing applications. The
instances of failure experienced were all related to
fatigue situations where the crest fix fastener was
subject to repeated bending as the roof sheet expanded
and contracted.
Aluminium sheeting and purlins on a sheltered test rig
at our King Island site. Purpose of this test was to
measure the relative corrosion performance of Stainless
and other coated screws when used in Aluminium. Test
period 44 months. Results confirm the use Stainless
304-316 series as the best solution for this sheeting
system.
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