The invention relates to an Sn-containing heavy-duty material composition for coating base metals. Said material composition comprises: 0.6 to 91 wt. % of Sn; 75 to 94 wt. % of Al; 0.7 to 82 wt. % of Cu; 0 to 27 wt. % of Pb; 6 to 30 wt. % of Sb; 0 to 2 wt. % of Zn; 0 to 1 wt. % of Ni; 0 to 1 wt. % of As; 0 to 0.2 wt. % of Ag; 0 to 1.2 wt. % of Cd; 0 to 0.1 wt. % of Se; 0 to 0.2 wt. % of Cr; 0 to 2 wt. % of Bi; 0 to 5 wt. % of In; optional hardeners, solid lubricants, auxiliary welding agents. Also disclosed is a method for producing a heavy-duty coating composed of 0.6 to 85 wt. % of Sn; 75 to 94 wt. % of Al; 0.7 to 82 wt. % of Cu; 0 to 27 wt. % of Pb; 6 to 30 wt. % of Sb; 0 to 2 wt. % of Zn; 0 to 1 wt. % of Ni; 0 to 1 wt. % of As; 0 to 0.2 wt. % of Ag; 0 to 1.2 wt. % of Cd; 0 to 0.1 wt. % of Se; 0 to 0.2 wt. % of Cr; 0 to 2 wt. % of Bi; 0 to 5 wt. % of In, optional hardeners, solid lubricants, auxiliary welding agents, and auxiliary processing agents such as free-flowing agents, pressing agents. According to the inventive method, an input stock of said composition is provided, the input stock is introduced into a laser welding station, one or several metal layers are laser-welded onto a base metal by means of the laser welding station, and the obtained heavy-duty coating is optionally finished. The invention finally relates to the use of said coating as a heavy-duty coating on base metals, bearings.