Plain bearing composite material

A plain bearing having a first bearing shell and a second bearing shell, the first bearing shell and the second bearing shell being made of a plain bearing composite material comprising

• a supporting layer (12) made of steel,
• a bearing metal layer (14) made of copper or a copper alloy that is applied to the supporting layer (12), and
• a roll bonded functional layer (16) made of aluminum alloy that is applied to the bearing metal layer (14), the aluminum alloy of the functional layer (16) contains tin and except for unavoidable impurities is lead-free, wherein the first bearing shell and the second bearing shell are combined to create a journal bearing, wherein the bearing metal layer (14) of the first bearing shell has a layer thickness (h21) of 150 μm to 595 μm and the functional layer (16) of the first bearing shell has a layer thickness (h31) of 5 μm to 50 μm;
• wherein the bearing metal layer (14) of the second bearing shell has a layer thickness (h22) of 50 μm to 550 μm and the functional layer (16) of the second bearing shell has a layer thickness (h32) of 50 μm to 500 μm, and
• wherein the total thickness of the bearing metal layer and the functional layer of the first bearing metal layer and the total thickness of the bearing metal layer and the functional layer of the second bearing shell are essentially equal,
• wherein the aluminum alloy of the roll bonded functional layer consists of, except for impurities,
• 5-25 wt. % tin,
• 1.5-3.0 wt. % silicon,
• 0.2-2.0 wt. % copper,
• 0.2-1.5 wt. % manganese,
• a total of a maximum of 0.4 wt. % and individually a maximum of 0.2 wt. % of at least one element from the group vanadium, chromium, zirconium, and titanium, and the rest aluminum.