Hastelloy B (UNS N10001 / W.Nr. 2.4800)

Hastelloy B (UNS N10001 / W.Nr. 2.4800) is a nickel-molybdenum based alloy that is highly resistant to corrosion in reducing environments such as hydrochloric acid and performs well under high temperature conditions.

Equivalent Grades

Hastelloy BNS3201Hastelloy BN10001S-NiMo302.4800

Chemical Composition, %

Hastelloy B≤0.05≤1.0≤1.0≤0.04≤0.03≤1.0Bal26.0-30.00.2-0.44.0-6.0

Typical Physical and Mechanical Properties (RT, Solution annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HB

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM B335, ASME SB335, ASTM B366, ASME SB366, ASTM B564, ASME SB564, ASTM B472, ASME SB472
Plate, Sheet and StripASTM B333, ASME SB333
Pipe and TubeASTM B622, ASME SB622, ASTM B619, ASME SB619
Welding ProductAWS A5.11 (ENiMo-10), AWS A5.14 (ERNiMo-10)
OthersASTM B366, ASME SB366, ASTM B564, ASME SB564


  • Control the iron and chromium elements at the lowest level to prevent the formation of β phase Ni4Mo
  • Excellent corrosion resistance to the reduction environment
  • Excellent medium concentration of sulfuric acid and many non oxidizing acid corrosiveness
  • Good resistance to chloride ion reduction of stress corrosion cracking (SCC)
  • Excellent ability to endure a variety of organic acid corrosion


Hastelloy B has a wide range of applications in the fields of chemical, petrochemical, energy manufacturing and pollution control, especially in sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid and other industries.