Min. Order Reference FOB Price
1 Piece US$500.00-6,000.00 / Piece
Product Description
Product Description Square Kelly Square Kelly is made of AISI 4145H alloy steel. ac. to API Spec.7 and SY/T6509. It is formed by hot forged and fully heat-treated by intermediate frequency indction heat treatment or 20m horizontal optical resistance furnace to gain high physical properties in ...