Alloy C276

Heating is commonly performed processes in the treatment of Alloy C-276 to achieve a specific temperature range for subsequent processes like welding, hot forming, or stress relieving, improve material ductility, reduce residual stresses, and facilitate further fabrication. Alloy C-276 generally uses esistance heating, induction heating, or furnace heating to achieve the desired temperature, ensure that the heating is uniform to prevent thermal gradients and potential distortion.

Pickling is a chemical process, typically performed after welding, hot forming, or when the material's surface has become contaminated,  to remove surface contaminants, scale, and oxide layers from Alloy C-276. Pickling  involves immersing the material in an acid solution to dissolve the unwanted layers. Commonly used acids include a mixture of nitric and hydrofluoric acids or a mixture of nitric and hydrochloric acids. As for immersion time, it depends on the severity of surface contaminants and the desired level of cleaning.

The hot forming of Alloy C-276 should be between 1600 and 2250°F (870 and 1230°C), with all heavy forming above 2000°F (1090°C). The alloy is normally annealed at 2100-2150°F (1150-1175°C) and rapidly cooled such as by water quenching.

AlloyC-276 is also suitable for cold forming processes, the cold working process include techniques such as bending, drawing, deep drawing, or cold rolling etc,. The alloy exhibits high work hardening rates, meaning it becomes harder and more difficult to deform as it is cold worked. Frequent annealing or intermediate heat treatments may be necessary to restore ductility and reduce the risk of cracking.