... construction machinery part 2. Technology: casting 3. Material Grade: Alloy steel 8620 4. Standard: ASTM, JIS,DIN,BS,NF 5. ... part ItemDescriptionProduct Class:Investment castingMaterial: Copper, Stainless steel, Carbon steel, Alloy steel such as 304, 316, 25#, 45#, 40Cr,ect.R ... world for inquiry and build a friendly & long cooperated relationship Alloy steel construction machinery part