Hastelloy C276 Bolts vs Inconel 625 Bolts

Q: Can you tell me the difference between Hastelloy C276 and Inconel 625? They both seem to be corrosion resistant to sulfuric acid but I also need a high strength material.

A: Yes both perform well in sulfuric acid application, but in terms of corrosion resistance, Hastelloy C276 bolts would perform better. Where strength is concerned, Inconel 625 fasteners have the advantage offering 144ksi UTS vs. Hastelloy’s 107 ksi. The material you select all depends on the concentration of sulfuric acid, temperature and strength needs.

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