Hastelloy B2 Alloy Bar/Plate/Tube, UNS N10665, W.Nr. 2.4617, NS322, NiMo28

Premium Hastelloy B-2 Alloy (UNS N10665 / W.Nr. 2.4617) - Sheet/Plate/Bar/Tube - China Manufacturer

Key Features & Advantages:

• Exceptional Corrosion Resistance: Offers outstanding resistance to reducing media like hydrochloric acid at various concentrations and temperatures, as well as medium-concentration sulfuric acid, acetic acid, and phosphoric acid environments, even with chloride ion presence.
• Optimized Welding Performance: Extremely low carbon and silicon content minimizes carbide precipitation in the weld heat-affected zone (HAZ), ensuring the welded seam maintains excellent corrosion resistance.
• Stable Metallurgical Structure: Features a face-centered cubic lattice structure. Minimized iron and chromium content reduces processing brittleness and prevents the formation of detrimental Ni4Mo phases.
• Superior Manufacturing Quality: Our strictly controlled manufacturing process guarantees the alloy is in the optimal metallurgical state with a pure crystal structure, delivering the best possible performance.

Technical Specifications:

• Common Names: Hastelloy B-2, Alloy B-2
• International Standards: UNS N10665, W.Nr. 2.4617, NS322 (China), NiMo28 (France)
• Metallurgical Structure: Face-Centered Cubic (FCC)
• Hot Working Temperature Range: 1160°C to 900°C (Heating should be rapid to target temperature)

Processing Guidelines:

• Machining: Should be performed after annealing. Use lower cutting speeds and heavier feed rates compared to standard austenitic stainless steels to overcome the material's high work-hardening rate.
• Surface Cleaning: Adherent oxides and weld slag must be removed using a fine-grain sanding belt or grinding wheel.
• Forging: The final grain size is directly related to the degree of deformation and the final forging temperature.

Main Applications: Hastelloy B-2 is widely used in industries requiring exceptional resistance to reducing acids and harsh chemical environments, including:

• Chemical Process Industry (CPI): Reactors, vessels, and piping for sulfuric, hydrochloric, acetic, and phosphoric acid processing.
• Petrochemical Industry: Equipment exposed to corrosive catalysts and by-products.
• Pollution Control Systems: Components in scrubbers and waste treatment systems.
• Energy and Manufacturing: Critical components in aggressive environments.

• Chemical composition

  Alloy brand % Ni Cr Fe Mo Co C Mn S Cu Hastelloy B-2 Min. Bal. 0.4 1.6 26.0           Max. 1.0 2.0 30.0 1.0 0.01 1.0 0.01 0.5

  Physical properties:

  Density g/cm3 Melting ºC Thermal conductivity λ/(W/m•ºC) Specific heat capacity J/kg•ºC Modulus of elasticit GPa Resistivity μΩ•m Coefficient of linear expansion a/10-6ºC-1 9.2 1330 1380 11.1(100ºC) 377 217 1.37 10.3(20~100ºC)

  Mechanical properties :(minimum value of mechanical properties at 20ºC)

  Heat treatment method tensile strength b/MPa yield strength p0.2/MPa elongationσ5 /% Hardness HBS Solution treatment 745 325 40 ≥250

   

  Production execution standard:

  Standard bar forging plate (strip) wire pipe USA association for materials and testing ASTM B335 ASTM B335 ASTM B333   ASTM B622 ASTM B619 ASTM B626 USA technical specification for aerospace materials           USA society of mechanical engineers ASME SB335 ASME SB335 ASME SB333   ASTM SB622 ASTM SB619 ASTM SB626