ASTM B366 WPHC276 / UNS N10276 BW Pipe Fittings Hastelloy C276 Elbow 45 Degree 90 Degree

Hastelloy C276 Pipe Fittings ASTM B366 UNS N10276 / DIN 2.4819 Nickel Alloy 90 Degree LR Elbow

 
Common Pitfalls

• Do not confuse C276 with C22, C2000, C4, or 316L.

• Confirm long radius vs short radius.

• Confirm schedule matches the pipe.

• Verify PMI and mill certificate.

• Check whether seamless or welded is required.

• Confirm NACE / sour service requirements if applicable.

 
Equivalent Grades of ASTM B366 Hastelloy C276 Elbow Buttweld Pipe Fittings

 
 
Mechanical Properties of ASTM B366 Hastelloy C276 Elbow Buttweld Pipe Fittings

 
 
Chemical Composition % of ASTM B366 Hastelloy C276 Elbow Buttweld Pipe Fittings

 
  
Important Considerations

• Cost: Alloy C276 fittings are significantly more expensive than standard stainless steel fittings due to the high nickel, molybdenum, and chromium content.

• Counterfeits/Mislabeling: Ensure material certification (Mill Test Certificate - MTC) is provided, traceable to the heat/lot number. Positive Material Identification (PMI) testing on-site is a common verification practice.

• Machining & Welding: Requires specialized procedures. Welding should use matching or over-alloyed filler metal (e.g., ERNiCrMo-4).

• Alternative Grades: For even more severe oxidizing conditions or higher temperatures, grades like C22 (UNS N06022) or C2000 (UNS N06200) might be considered.

 
 
Applications

• Direction changes in process piping

• Pump suction and discharge lines

• Heat exchanger inlet/outlet connections

• Scrubber and absorber inlet/outlet duct transitions

• Manifold and header branches

• Offshore seawater and firewater systems

• Acid transfer and loading lines

• Flare, vent, and drain lines in corrosive service