GST Tax rate on C.I.Casting Item And Event Decoration

C.I.Casting item.......18%

Event Management services......18%

we have machine shope and  manufacturing as per customer drawings of various types machined component from castings, solid bar, plate etc. What is rate of GST and HSN COde

73239200 HSN code for cast iron

 7325 , List of Hs Codes for OTHER CAST ARTICLES OF IRON OR STEEL

ci-casting-hs-code

Dear sir,

Please let me know hsn code for manfauring iron trolly and rate.

Regards

C I casting comes under which group?