... polluting,innocuous,insulating,strong fire-retardant,long usage life(up to 50-100 years),The aluminium, ... coating,fluorocarbon spray-painting and wood grain coatingCHEMICAL COMPOSITION OF ALUMINIUM ALLOY PROFILESiMgFeCuMnZnCrTiImpurityAl0.2~0.60.45~ ... .15 SurplusROOM TEMPERATURE MECHANICAL PROFERTIES OF ALUMINIUMLntensity of stretching resistance Lntensity of bending Streatching tate Parttern thinkness ...