Material and surfaces of Tucker weld studs

From simple bearing protection to long-term corrosion protection, SEF can offer the right surface quality. We develop and adhere to the requirements of all release processes throughout the automotive industry for our customers.

Materials and stability classes for Tucker weld studs are also harmonised with all customer requirements.

Stability classDescription

A2

stainless steel A2

F1

stainless steel F1

Cu

Copper

4.8

Steel 4.8

AlMg

Aluminium-Magnesium
alloy

Brass

Messing

6

Steel 6

6.8

Steel 6.8

8

Steel 8

8.8

Steel 8.8

10

Steel 10

surface- codeDescription

0

burnished copper plating, 2-6 µm

2

nickel-plated, 10 - 15 µm

3

burnished copperplating 8 - 12 µm

4

galvanised, 8 - 12 µm, chromalised black

5

uncoated without subsequent processing
(only stainless steel)

6

galvanised without subsequent processing,
8 - 12 µm 9

10

galvanised, 6 - 12 µm,
chromalised blue chromium 3

13

burnished copperplating + lubricant

16

Tin/Zinc SnZn 70/30,
8 - 12 µm

17

Titanium protective coating

18

Zinc/Iron ZnFe ,
8 - 12 µm,
chromalised black

19

Aluminium-etched with titanium

conversion treatment

21

Almac, 14 +/- 3 µm silvery grey TL155

22

galvanised, 8 - 12 µm, colourless/bluish
chromalised Chromium 3 / thick layer
passivation

23

with anti-friction agent

24

sealed with sealing wax

25

galvanised, 8 - 12 µm, colourless/bluish
chromalised Chromium 3 / thick layer
passivation,
dyed red

26

Tin/Zinc SnZn 70/30,
5 - 8 µm, transparent chromalisation chromium 3

27

Aluminium polished with titanium

conversion treatment

29

Tin/Zinc SnZn 30/70,
8 - 12 µm, mechanically coated

30

Tin/Zinc SnZn 70/30,
5 - 8 µm, transparent chromalisation chromium 3 +
Slotofin Nr. 10 seal

31

Zinc flake coated surface

32

Zinc/Nickel 12-15% Nickel,
8 - 12 µm, colourless chromalisation with anti-friction agent

34

Tin/Zinc SNZn 70/30,
5 - 8 µm, transparent chromalisation + anti-friction agernt

35

Zinc flake coated surface

36

Zinc/Nickel 12-15% Nickel,
8 - 12 µm, colourless chromalisation

Further information on Tucker weld studs