Hastelloy B2 is a nickel-molybdenum alloy with significant resistance to reducing environments, such as hydrogen chloride gas and sulfuric, acetic and phosphoric acids.Hastelloy B2 provides resistance to pure sulfuric acid and a number of non-oxidizing acids
The alloy should not be used in oxidizing media or where oxidizing contaminants are available in reducing media. Premature failure may occur if alloy B2 is used where iron or copper is present in a system containing hydrochloric acid.
Because this alloy contains no significant chromium addition it should NOT be used in oxidizing media or in presence of oxidizing salts, such as ferric or cupric salts. The latter may form when iron or copper is present in a system containing hydrochloric acid. Likewise HASTELLOY B-2 does not withstand wet chlorine gas or hypochlorite bleach.HASTELLOY B-2 should not be exposed to temperatures in the 1000 - 1600F range because of severe loss of ductility. In a vacuum HASTELLOY B-2 may be used from 1600F to substantially higher temperatures.
Hastelloy B2 Features
- Resists hydrochloric acid at all concentrations and temperatures
- Withstands wet HCl gas, sulfuric, acetic and phosphoric acids
- Excellent resistance to pitting and to stress corrosion cracking
Chemical Analysis of Hatelloy B2 (UNS N10665)
Ni Cr Mo Mn Si C S P Co Fe Min -- 26 -- -- -- -- -- -- Max Balence 1 30 1 0.1 0.02 0.03 0.03 1 2
Sheet / Plate ASME SB 333 Round Bar ASME SB 335 Pipe ASME SB 366/ ASME SB 619 / ASME SB 619 /Class I or II /ASME Tube SB 622 / ASME SB 626 Fittings ASTM B 333 /ASTM B 335/ASTM B 366/ASTM B 619/ASTM B Forgings NACE MR0175/UNS N10665
Temperature,F 32 212 392 572 752 932 Coefficient* of Thermal Expansion, in/inF x 10-6 -- 6 6 6.2 6.4 6.5 Thermal Conductivity Btu.ft/ft2.hr.F 6.4 7.1 7.7 8.4 9.2 10
Minimum Specified Properties, ASTM A 240
Typical Minimum Specified Ultimate Tensile Strength(ksi) 130 110 0.2% Yield Strength, ksi 59 51 Elongation,% 60 40 Hardness MAX, Brinell 94-98 100 Max
Mechanical Properties - Annealed Material
Product Tensile Min. (ksi) .2% Yield Min. (ksi) Elongation Min. Rod & Bar110 51 40 Sheet/Plate110 51 40 Welded Pipe & Tube110 51 40 Seamless Pipe & Tube110 45 40