Hastelloy Mesh

Hastelloy mesh is a high-performance woven or welded mesh made from Hastelloy® nickel-based superalloys, designed for the most aggressive chemical environments where stainless steels (even 316L, 904L) and Inconel fail. It is the go-to choice for extreme acid, chloride, and high-temperature applications in chemical processing, aerospace, and pollution control. 

Key Features of Hastelloy Mesh: 

Unmatched Corrosion Resistance 

✔ Resists hydrochloric, sulfuric, phosphoric, and nitric acids (even at high temps). 

✔ Impervious to pitting & crevice corrosion in chlorides (better than Inconel 625). 

✔ Handles oxidizing & reducing environments (unlike standard metals). 

Temperature Performance: 

– C276/C22: Up to 1095°C (2000°F) (continuous). 

– Hastelloy X: Up to 1200°C (2200°F) (for extreme heat). 

Mechanical Strength: 

– High tensile strength even at elevated temps. 

– Excellent fatigue resistance for vibrating/cyclic loads. 

Mesh Types & Specs: 

– Weaves: Plain, twill, Dutch, welded. 

– Mesh Sizes: 20 mesh (coarse) to 400 mesh (ultra-fine). 

– Wire Diameter: 0.025mm (fine) to 3mm (heavy-duty). 

Top Applications of Hastelloy Mesh 

 Chemical & Petrochemical 

– Acid filtration (HCl, H₂SO₄), reactor screens, chlorine gas scrubbers. 

Pollution Control (FGD, Waste Incineration) 

– Flue gas desulfurization (FGD) mist eliminators. 

– Chimney filters for toxic emissions. 

Aerospace & Defense 

– Rocket engine components, exhaust screens. 

Pharmaceutical & Nuclear 

– High-purity acid handling, nuclear waste containment. 

Oil & Gas (Sour Service) 

– Downhole filters, offshore platform components. 

 Hastelloy vs. Other Alloys: 

When to Choose Hastelloy? 

– Boiling hydrochloric/sulfuric acid exposure. 

– Offshore/marine + chemical combo environments. 

– Where 316L, 904L, or Inconel fail. 

When Not to Use It? 

– Mild environments (overkill, use 316L). 

– Budget-limited projects (very expensive). 

Fabrication Notes: 

– Welding: Use Hastelloy filler metals (e.g., ERNiCrMo-4 for C276). 

– Machining: Requires slow speeds, sharp carbide tools. 

– Cleaning: Passivate with nitric-hydrofluoric acid for max corrosion resistance. 

Standards & Grades: 

– Hastelloy C276: UNS N10276 / EN 2.4819 

– Hastelloy C22: UNS N06022 / EN 2.4602 

– Hastelloy B2: UNS N10665 

Final Verdict 

Hastelloy mesh is the king of corrosion-resistant alloys, ideal for the most aggressive chemical, high-temperature, and marine environments. It’s expensive but unmatched where failure is not an option. For less extreme conditions, consider Inconel 625 or 316L. For high heat without acids, RA330 or Inconel 600 may suffice.