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HASTELLOY B2

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 Application

  • 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

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

Specification


  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

Physical Properties


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 & Bar
110
51 40
Sheet/Plate
110
51 40
Welded Pipe & Tube
110
51 40
Seamless Pipe & Tube
110
45 40