Cost-effective protection against corrosion and reduced mating / unmating force of contacts – this is what our hot-dip tinned finishes offer you. Furthermore, we can adjust the tinned surface to yield additional specific desirable properties.
Ever-more exacting reliability requirements mean that electro-mechanical components are increasingly made from pre-tinned strip. Especially in the automotive industry, hot-dip tinning has proven itself time and time again to be the preferred option for corrosion protection and contact surfaces. Special tinning processes have been developed to permit higher operating temperatures, reduce mating / unmating forces, and minimise fretting corrosion.
Tin-silver coatings typically offer greater temperature stability and hardness than pure tin coatings. Tin-silver coatings on STOL® 76M or STOL® 94 alloys are suitable for applications hotter than 130°C. This is an entirely lead-free solution that significantly reduces whisker formation and allows soldering for up to six months.
The table below gives an overview of the differing STOL® coating solutions for hot-dip tinned strip and the particular properties of each special tin coating.
STOL® Sn10 – Pure Tin
Standard coating with IMP*
Coating thickness determines advantages
STOL® Sn11 – Thin layer
Reduced mating and unmating forces, less prone to fretting corrosion,
IMP*: Sn = 1 : 1
STOL® Sn13 – Thermal Tin
Lowest mating and unmating forces, wear resistant
More mating cycles possible, due to thicker IMP and pure-tin top layer
IMP*: Sn = 1 : 1
STOL® Sn28M – Tin-Silver
Operating temperatures up to 150°C possible, depending on coating combination
We can supply rolled strips with hot-dip tinned coatings that meet DIN EN 13148.
KMD's hot-dip tinned coatings are compliant with the EU RoHS Directive (Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment. This directive restricts the use (and placing on the market) of hazardous substances in electrical devices and electronic components). The intrinsic process characteristics of hot-dip tinning enables coating with alloys. Hot-dip tinned strip is available up to 330 mm maximum width and between 0.15 and 1.5 mm thickness.
We are able to provide two in-house hot-dip tinning options: Mechanical Wipe Tinning (MWT) and Hot Air Levelled Tinning (HALT).
|Thickness:||0.20 - 1.50 mm|
|Width:||up to 330 mm|
|Coatings:||pure tin, silver-tin, thermal tin|
|Coating thickness**:||1.0 - 3.0 μm|
2.0 - 5.0 μm
4.0 - 10.0 μm
10.0 - 20.0 μm
We manufacture electro-plated products according to DIN EN 14436. Via our external electroplating subcontractors, we are able to work with thicknesses from 0.40 to 2.00 mm in widths of up to 170 mm.
|Thickness:||0.4 - 2.00 mm|
|Width:||up to 300 mm|
|Coatings:||Sn on Cu and Sn on Ni|
|Coating type:||fully plated, dull, bright, or reflow|
Sn/Cu – Sn/Ni
holohedral, dull, bright, reflow
Sn/Cu – Ni
Ag/Ni – Cu