Method of making almn alloy strips or sheets and strip or sheet made of almn alloy

Production of AlMn bands or sheets used in the manufacture of building components by soldering comprises producing a pre-material from a melt containing 0.3-1.2 wt.% Si, ≤ 0.5 wt.% Fe, ≤ 0.1 wt.% Cu, 1.0-1.8 wt.% Mn, ≤ 0.3 wt.% Mg, 0.05-0.4 wt.% Cr + Zr, ≤ 0.1 wt.% Zn, ≤ 0.1 wt.% Ti, and ≤ 0.15 wt.% Sn, unavoidable impurities whose individual contents are a maximum of 0.05% and whose sum is a maximum of 0.15 wt.%, and a balance of aluminum. The pre-material is heated to less than 520 degrees C for a maximum of 12 h, hot-rolled at at least 250 degrees C to form a hot band, and cold-rolled to form a cold band without intermediate annealing. An Independent claim is also included for an AlMn band or sheet produced by the above process. Preferred Features: The minimum Si content is 0.5, preferably 0.75 wt.% and the maximum Si content is 1.0 wt.%. The maximum Fe content is 0.3 wt.%. The maximum Cu content is 0.05 wt.%. The Mn content is 1.3-1.5 wt.%. The maximum Mg content is 0.1 wt.%. The Cr content is 0.1-0.2 wt.%. The maximum Zr content is 0.05 wt.%. The maximum Zn content is 0.05 wt.%. The maximum Ti content is 0.05 wt.%.