Hastelloy N10665 Pipe

Hastelloy B2 (UNS No. N10665,2.4617) is a high-performance nickel-based alloy with nickel and molybdenum as the main components, designed for extreme corrosive environments. Its unique chemical composition and microstructure give it excellent corrosion resistance, high temperature stability and mechanical strength, making it a key material in the chemical, petroleum, pharmaceutical and other industrial fields. HT PIPE is a Hastelloy B2 Pipe supplier with 15+ export experience.

manufacturing process of Hastelloy N10665 pipe

Hot rolling of Hastelloy 2.4617 tube

The hot working temperature needs to be kept in the range of 1000-1200 degree to prevent cracking caused by low-temperature rolling.

Cold rolling of Alloy B2 pipe

After cold working, solid solution treatment at 1050-1100 degree is required to eliminate residual stress.

welded of N10665 pipe

The welding process recommends the use of ERNiMo-7 welding wire and argon arc welding (GTAW) to reduce heat input and avoid σ phase embrittlement in the weld area.

Specification of Alloy B2 Pipe

Material Testing of Hastelloy B2 pipe

Chemical composition of Alloy B2 pipe

The typical composition of Hastelloy B2 is nickel (about 65%-70%), molybdenum (about 26%-30%), and contains a small amount of iron, chromium and cobalt. This high molybdenum content makes it extremely resistant to corrosion in reducing media (such as hydrochloric acid, sulfuric acid, phosphoric acid).

Physical and mechanical properties of Alloy N10665 tube

The tensile strength of Hastelloy B2 steel pipe at room temperature can reach more than 730 MPa, the yield strength is about 340 MPa, the elongation is more than 40%, and it has good plasticity and toughness. Its high temperature performance is also excellent, it can work stably for a long time below 400 degree , and the short-term temperature resistance can reach 800 degree . In addition, its thermal expansion coefficient is low (about 11.2 μm/m· degree ), which can reduce the risk of deformation caused by thermal stress in a temperature fluctuation environment.

Hastelloy B2 pipe Compared with others

Hastelloy B3: B3 reduces the tendency of hot working cracks by adding tungsten (1-3%) and optimizing the nickel/molybdenum ratio, but the cost is increased by about 20%.

Inconel 625: Although it performs better in oxidizing environments (such as seawater), its hydrochloric acid tolerance is only 1/3 of B2.

Titanium alloy (Gr.2): The corrosion resistance in dilute hydrochloric acid is similar, but titanium alloy is prone to hydrogen embrittlement when the temperature exceeds 100 degree , and the upper limit of B2 is higher (400 degree ).

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