Dong ying changrui investment casting Co.,ltd
   Dondying changrui locates in Dongying Economic Development Zone(DEDZ),Dongying city ,we are specialized in investment casting covering an area of 38,000 square meters,which include5,ooo square meters for workshop,workers more than 120.
   We use investment casting ,precise processing,surface treament tchnology to make hundreds of  different castings and intensive processing product with material of Carborn Steel, Stainless Steel,Low alloy Steel,High - temperature Steel and so on.
   We are an experienced manufacture of steel investment castings which produces castings by means of the silican sol(lost-wax)process.
   We will try my best to make it straight forward to establish direct purchasing of your components from a reliable manufacturer operating to IS09001:2000.
   With an output of 303Ts castings per month,export everywhere in the world.

   Services and products
   Castings-investment
   Equipment-Electrical/Lighting
   Finishing-Polishing /Shot Blasting /Shot Peening /other
   Heating treating -Anneaing/Tempering.Hardening
   Machining/Machining of Castings

   Quanlity control
   1.Process control follow ISO9001:2000.
   2.Material control use Spectrucm analyzer import from Japan.
   3.Mechanical properties:Tensile testing machine,non-destructive testin (NDT),Air-tighting test  and water-press testing machine.
   4.Testing tool:Sclerometer,Caliper,Goniometer,Micrometer,Height gage,Three-dimensional survery meter,Projector in specialized company.
   5.Metallography test:Metallyrgical mircoscopy (take photos,put on picture).
   6.Certificate of products:Through specialized organization can take the certificate.