KÖCO KST 108 - Requirements Placed on Materials

2.5 Requirements placed on materials
Basically, stud welding with tip ignition is possible with all materials suitable for arc welding. Even different mate-
rials, such as carbon steel and stainless steel, can be welded together by this method without any problems,
since blending between the two welding pools is only minimal, with hardly any brittle transition zones resulting.
Due to the extremely short welding time, a clean, smooth surface is vital for achieving good welding results.
The material combinations listed in chart 2 have been proven in practice. Since a precisely calibrated ignition tip
is an absolute necessity, standardized studs that comply with EN ISO 13918 should be used wherever possible.
Chart 2: Material combinations for drawn-arc stud welding
Parent Metal
Stud
Material
non-alloy steel
up to app. 0.35%
C, for example
S235, S355, C35
stainless Austenite
steel, for example
1.4301, 1.4401,
1.4541, 1.4571
non-alloy steel up
to app. 0.35% C,
for example S235,
S355, C35, with
zinc or other metal
coating, max. 25
µm
copper and
copper alloys,
for example
CuZn37
(lead- free)
aluminium
and alu-
minium
alloys
non-alloy steel
up to 0.18%
C, for example
S235
well suited
well suited
suitable to a lim-
ited degree
suitable to a
limited degree
impossible
stainless aus-
tenite steel, for
example 1.4301
well suited
well suited
suitable to a lim-
ited degree
well suited
impossible
CuZn37 (brass
lead free)
suitable to a lim-
ited degree
well suited
suitable to a lim-
ited degree
well suited
impossible
AlMg3, Al99,5
unsuitable
unsuitable
unsuitable
unsuitable
well suited
Issue 4/2019 ver. 2.0 page 12 of 42
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