A crankshaft bearing shell in an internal combustion engine of a vehicle is made
from a steel/aluminum composite material and is composed of a steel supporting
layer and an aluminum plated sliding layer containing parts of tin and copper in
the aluminum sliding layer, optionally comprising an intermediate layer consisting
of pure aluminum. The aluminum sliding layer comprises A1Sn (20-23) Cu(1.8-2.3)
alloy, optionally containing additions of up to 0.1 wt % of Ni, 0.7 wt % of Si,
0.7 wt % Fe, 0.7 wt % Mn, 0.2 wt % Ti, wherein the sum of Si, Fe and Mn is less
than 1 wt %; and impurities form a total amount of less than 0.5 wt.- % with the
aluminum sliding layer having a Brinell hardness of at least 45 HB 1/5/30 after
heat treatment.
