Hastelloy B/B-2 nickel-molybdenum alloy
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- Product Description
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- Commodity name: Hastelloy B/B-2 nickel-molybdenum alloy
Hastelloy B- 2 is a face-centered cubic lattice structure. By controlling the iron and chromium content at the minimum, the processing brittleness is reduced, and the precipitation of Ni4Mo phase between 700-870°C is prevented.
Product Details
Hastelloy B/B-2(UNS N10665/W. No.2.4617) Chemical Composition % Ni Cr Fe Mo C Mn Si S P Co V B Min. Allowance 4.0 26 0.2 Max. Allowance 1.0 6.0 30 0.05 1.0 1 0.03 0.04 2.5 0.4 B-2 Min. Allowance 2.0 26 Max. Allowance 1.0 7.0 30 0.02 1.0 0.1 0.03 0.04 1.0 Physical Characteristics Density 9.24g/cm³ Melting point 1330-1380 ℃ Minimum values of the mechanical properties of alloys at room temperature Typical mechanical properties Tensile strength Rm N/mm² Yield strength RP0.2 N/mm² Elongation A5% Brinell hardness HB solution treatment 690 310 40 Characteristics
1. Control of iron and chromium elements in the lowest content to prevent the formation of phase Ni4Mo. 2. Excellent corrosion resistance to reducing environment. 3. Excellent resistance to medium concentration of sulfuric acid and many non-oxidizing acid corrosion. 4. Good resistance to chloride ion reduction stress corrosion cracking (SCC). 5. Excellent resistance to various organic acid corrosion ability.
metallographic structure
Hastelloy B- 2 is a face-centered cubic lattice structure. By controlling the iron and chromium content at the minimum, the processing brittleness is reduced, and the precipitation of Ni4Mo phase between 700-870°C is prevented.
Corrosion resistance
Nickel-molybdenum alloy Hastelloy B- 2 carbon, silicon content is very low, reduce the welding heat affected zone carbon and other impurity phase precipitation, so the weld also has sufficient corrosion resistance. Alloy Hastelloy B 2 has good corrosion resistance in reducing media, such as hydrochloric acid solutions of various temperatures and concentrations. In the medium concentration of sulfuric acid solution (or containing a certain amount of chloride ion) also has good corrosion resistance. It can also be used in acetic acid and phosphoric acid environments. Alloy materials can have the best corrosion resistance only when they are in a suitable metallographic state and a purely contested crystal structure.
Scope of application
Alloy Hastelloy B- 2 is widely used in chemical, petrochemical, energy manufacturing and pollution control fields, especially in sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid and other industries.
Key words:
Hastelloy B/B-2 nickel-molybdenum alloy
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