Hastelloy B2 fasteners and B3 fasteners
Differences between Hastelloy B2 and B3 fasteners
The main difference between Hastelloy B3 fasteners and B2 fasteners is corrosion resistance. Hastelloy B3 fasteners have excellent corrosion resistance in hydrochloric acid at all concentrations and temperatures, while Hastelloy B2 fasteners have a moderate level of corrosion resistance.
What is the difference between Hastelloy B2 and B3?
Hastelloy B3 has a stronger resistance to hydrochloric acid and performs better at elevated temperatures. On the other hand, Hastelloy B2 has excellent resistance to sensitization.

What is the difference between B2 Alloy and C276 Alloy?
Hastelloy B2 and Hastelloy C276 are both excellent alloys, each with unique properties for different applications. Hastelloy B2 excels in resisting corrosion from reducing acids, while Hastelloy C276 exhibits excellent resistance to a wide range of corrosive media.
What is Hastelloy B3?
Hastelloy B-3 is a nickel-molybdenum alloy that offers excellent resistance to pitting, corrosion and stress corrosion cracking, and better thermal stability than alloy B-2. In addition, this nickel-steel alloy offers excellent resistance to tool mark and heat affected zone corrosion.
Comparison Between Hastelloy B2 and Hastelloy B3
Chemical Composition
The difference between Hastelloy B2 and Hastelloy B3 lies in the composition of the two materials. Hastelloy B2 consists mainly of nickel and molybdenum, while Hastelloy B3 also contains tungsten. These elements in B3 make its mechanical properties and resistance to stress corrosion cracking stronger than B2 in certain corrosive environments.
Corrosion Resistance
B2 and B3 are ideal for corrosive environments, especially in non-oxidizing acids. B3 exhibits enhanced resistance to HCl and H2SO4 at various temperatures and concentration levels, and reduced tendency to localized corrosion and pitting. In addition, B3 has a higher resistance to stress corrosion cracking in acidic environments, indicating that it is more suitable for use in more severe conditions.

Gnee Steel is a supplier of Hastelloy B2 Fasteners And B3 Fasteners, covering Tubes: Seamless Tubes: Size: 4 - 219 mm; Thickness: 0.5 - 20 mm; Welded Tubes: Size: 5.0 - 1219.2 mm; Thickness: 0.5 - 20 mm, Plates: Plate Thickness 0.1 to 100 mm; Plate Width 10-2500 mm, Strips, Alloy Round Bar Sizes: Diameter 3-800 mm;, Flat Bar Sizes: Thickness 2-100 mm; Width: 10-500 mm, Hexagonal Bar Sizes: 2-100 mm;, Wire and Extruded Profiles. We work with steel mills to provide customers with 625 Alloy that meets or exceeds many leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN and BS standards.
Gnee Steel stocks and sells Hastelloy B2 Fasteners And B3 Fasteners, Tubes, Pipes, Plates, Strips, Plates, Round Bars, Flat Bars, Forged Billets, Hexagons, Wires and Extruded Profiles. Feel free to contact us for a quote at ss@gneesteel.com





