The pattern for the metallic framework of a removable partial denture is fabricated from:
Dental waxes can also be classified in one of three types, pattern wax (inlay, casting, and baseplate types), processing wax (boxing, utility, and sticky types), and impression wax (bite registration and correction types). 
Casting wax is used for partial denture frameworks and other metal frameworks.
Ref: Phillip’s 12th edition page 195.
Inlay wax type-II
Boxing wax
Modeling wax
Casting wax