Material: Ductile Iron. Standard: ASTM A536-84, Grade 60-40-18. Weight: 0.1kg-0.6kg. Type: 1/4?-1?. Process: machine make mould, Electric arc furnace makes with molten iron. Heat treatment Application: liquid pipeline. Export: America, England, Australia. Casting Dimension Tolerance: ±0.25mm. Surface: Refinement.