... .Material: ductile iron, grey iron 3. Weight: 0.1-150KGS gray iron casting of switch partGG201.Material: ductile iron, grey iron ... . Test: chemical composition, tensile test, hardness tester and etc.Our company was established in 1993, after 20 years'development, we have ... a quick delivery, welcome to contact us.PRODUCTSISO CERTFICATIONMATERIAL standardOUR COMPANY gray iron casting switch part GG20