Solution Annealing Hot Forged Fasteners
Solution Annealing Hot Forged Fasteners
(OP)
There are few common ASTM specifications in our industry including A193 and F593. These spec call for a solution anneal after the hot forging process. We are using round bar that has already been through a solution anneal treatment, heating it to forging temp., forging, and then water quenching the part. We have tested the parts to A262 practice A for corrosion resistance and they pass. They also pass all requirend mechanical testing. My question is, is it still necessary to solution anneal the bolts after hot forging if they are passing the corrosion test? Isn't the purpose of the solution anneal to keep the material in a corrosion resistant state? Any help is appreciated.





RE: Solution Annealing Hot Forged Fasteners
RE: Solution Annealing Hot Forged Fasteners
RE: Solution Annealing Hot Forged Fasteners
RE: Solution Annealing Hot Forged Fasteners
RE: Solution Annealing Hot Forged Fasteners
So you have controls in place to assure that you are not dropping below the required anneal temp during the forging operation? That would be a requirement.
Some specs allow this, some don't address it, and some specifically prohibit it. You need to read the heat treat sections very carefully. And be aware that the ASME may be different from the ASTM specs on this.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: Solution Annealing Hot Forged Fasteners
RE: Solution Annealing Hot Forged Fasteners
RE: Solution Annealing Hot Forged Fasteners