Material Selection Information Model Study Based on STEP Standard

Material selection information model was established for product lifecycle with STEP standard. The information model gives physical property,machine property,technology property,material price for the reality requirement by material data manual. The paper puts forward material selection ways of different design step. Key part' condition analysis in plan step. Part' environment and strength analysis in initial design step. Materials are examined by strength and technology property analysis in detail design step. The paper puts the ways of technology property and economics evaluation.