Q1: What are Hastelloy C276, C22, and B2 pipes and tubes, and why are they special?
A1: These are high-performance nickel-based alloys designed for extreme corrosion resistance:
C276: Excellent resistance to oxidizing and reducing environments, ideal for chemical processing.
C22: Superior resistance to pitting, crevice corrosion, and strong acids.
B2: Optimized for resistance to hydrochloric acid and reducing environments.
Q2: What are the main applications of these nickel alloy pipes and tubes?
A2: They are used in chemical processing, petrochemical plants, gas scrubbers, pollution control equipment, marine engineering, and heat exchangers, especially where strong acids or oxidizing agents are present.
Q3: How do these alloys compare with stainless steel or other nickel alloys?
A3: Compared with stainless steel, Hastelloy C276/C22/B2 offers much higher resistance to pitting, crevice corrosion, and stress corrosion cracking. They maintain mechanical strength in highly corrosive and high-temperature environments.
Q4: What are the typical mechanical properties of these pipes and tubes?
A4: These alloys typically have tensile strength of 550–760 MPa, yield strength of 200–400 MPa, and good elongation (20–40%). They maintain corrosion resistance and mechanical integrity even at elevated temperatures.
Q5: What standards, sizes, and forms are available?
A5: Hastelloy pipes and tubes are manufactured according to ASTM B622, ASTM B619, and equivalent international standards. They are available in seamless and welded forms, with diameters from 1/8" to 12" (or custom), and can be supplied in straight lengths or cut-to-size pieces.
