Usually for this alloy MR-0103 mandates a maximum hardness of 35 HRC, generally after solution annealing. Irrespective of the requirements, [highlight #FCE94F]formed or cold worked components[/highlight] should be solution annealed for best corrosion resistance.
Similar requirements are imposed by MR-0175/ISO-15156-3
For welds they are supposed to achieve the best corrosion resistance in as welded conditions.The only PWHT mandated for this alloy is solution anneal, whenever welding may involve thicker sections(3/4" & above), subject to design requireemnts.
Search in Haynes Intl webpage(booklet on welding of C-276 alloy) for more detailed guidelines.
Thanks.
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist
Ontario,Canada.
ca.linkedin.com/pub/pradip-goswami/5/985/299