The carbon and silicon content of the nickel-molybdenum alloys of Hastelloy B-2 is very low, reducing the phase precipitation of the carbon and other impurities of the weld heat affected zone, so the weld having a sufficient corrosion resistance. Hastelloy B-2 has good corrosion resistance in reducing medium, such as a variety of temperature and concentration of hydrochloric acid solution. Also has good corrosion resistance in the medium concentration of the sulfur the suan solution (or contains a certain amount of chloride ion). Also can be used acetic acid and phosphoric acid environment. The alloy material is only suitable metallurgical state and pure crystal structure in order to have the best corrosion resistance. Has a wide range of applications in the chemical, petrochemical, energy, manufacturing and pollution control in the field, especially in the sulfur suan, hydrochloric acid, phosphoric acid, acetic acid industry. Similar grades of Hastelloy B-2: NS322 (China), NiMo28 (France), W.Nr.2.4617 (Germany) Hastelloy B-2 Chemical Composition: Alloy Grade% the nickel Ni chromium Cr iron Fe Mo Mo niobium Nb manganese cobalt Co carbon C Mn the Si Si sulfur S copper Cu aluminum Al titanium Ti Hastelloy B-2 the smallest margin 0.4 1.6 26.0 Maximum 1.0 2.0 30.0 1.0 0.01 1.0 0.01 0.5 Hastelloy B-2 physical properties: density g/cm3 Melting Point ℃ thermal conductivity λ / (W / m? ℃) than the heat capacity J / kg? ° C GPa Shear modulus of elasticity modulus GPa resistivity μΩ? of m Poisson ratio coefficient of linear expansion a/10-6 ° C -1 9.2 1330 1380 11.1 (at 100 ° C) 377 217 1.37 10.3 (20 to 100 ° C) Hastelloy B-2 mechanical properties: (minimum) heat treatment at 20 ℃ detection of mechanical properties tensile strength σb / MPa yield strength σp0.2/MPa elongation σ5 /% Brinell hardness HBS solid dissolved processing 745 325 40 ≥ 250