Hastelloy B3/ Alloy B3 Property Characteristic
B3 alloy Seamless pipe 5.8 meter for England Client
Hastelloy B3 has extremely high resistance to the hydrochloric acid, sulfuric, acetic, formic and phosphotic acids, and other non-oxidizing media. And it has excellent resistance to pitting corrosion, to stress-corrosion cracking and to knife-line and heat-affected zone attack.
Fabrication & Heat treatment for Hastelloy B3
Wrought products of B3 alloy are supplied in the Mill Annealed condition, unless otherwise specified. This solution annealing procedure has been designed to optimize the alloy's corrosion resistance and ductility. Following all hot forming operations, the material should be re-annealed, to restore optimum properties. The alloy should also be re-annealed after any cold forming operations that result in an outer fiber elongation of 7% or more. The annealing temperature for b3 alloy is 1066℃（1950℉），and water quenching is advised(rapid air cooling is feasible with structures thinner than 10mm(0.375in.). A hold time at the annealing temperature of 10 to 30 minutes is recommended, depending on the thickness of the structure(thicker structures need the full 30 minutes).
Hastelloy b3 can be hot forged, hot rolled, hot upset, hot extruded, and hot formed. The B3 alloy more sensitive to strain and strain rates than the austenitic stainless steels, and the hot working temperature range is quite narrow. The alloy is stiffer than most austenitic stainless steels, and more energy is required during cold forming. Also, the hastelloy b3 work hardens more readily than most austenitic stainless steels, and may require several stages of cold work, with intermediate anneals.
