Kolbenschmidt Pierburg Group KS R21 Lead-free Steel-Aluminum Composite Material for Main Bearings

Brief description of the sliding material Plain bearings made from steel/aluminum composite materials are widely used as main bearings in gasoline and diesel engines. KS R21 is a robust bearing material. Compared to KS R20 this material has an improved load carrying capacity without losing the other characteristics, like good embedding capability and adaptability. Due to this characteristics bearing shells and thrust washers can be used in bi-material designs. KS R21 is insensitive to oil corrosion. With its specific load carrying capacity up to 55 MPa, this material is suited for application...

Chemical composition of the running layer Sn Cu Si Ti Ni Fe Mn others combined AI The hardness of the running layer is in the range of 40 - 60 HB Manufacture of the sliding material The aluminum alloy is manufactured in vertical continuous casting. Mechanical processing of the strand surface as well as the specific heat treatment steps prepare the material for plating. The so-called pre-composite results from plating a pure aluminum foil (Al 99.5) on the strand. Roll cladding is used to apply the pre-composite onto the steel. Selective thermomechanical treatment steps give the desired material...

KS Gleitlager GmbH · Am Bahnhof 14 · 68789 St. Leon-Rot · GERMANY Tel. +49 6227 56-0 · Fax +49 6227 56-302 · www.kspg.com KS Gleitlager GmbH does not assume any liability for the completeness of the data presented in this materials brochure. It is exclusively up to the customer to form his opinion about the characteristics of the material and its adequacy for the purposes intended by the customer. KS Gleitlager GmbH would also like to stress that any information given in this materials brochure does not constitute a legal guarantee for the appearance, characteristics and workmanship nor does...