Hastelloy C-2000
Features and applications overview:
The alloy is designed for resisting more corrosive chemicals, including sulfur acid, hydrochloric acid, and hydrofluoric acid. Different to previously optimized Ni-Cr-Mo alloy which is only resistant to oxidizing or reducing acid, C-2000 alloy has corrosion resistance to both of them. The combined effects of molybdenum and copper ( respectively accounting for 16% and 1.6%) make the alloy has good corrosion resistance to reducing media. Meanwhile the high content of chromium (23% wt) ensures the resistance to the corrosion of oxidizing medium. This alloy can be used in reactors, heat exchangers, valves, pumps, etc.
Hastelloy C-2000's similar grade:
NiCr23Mo16Cu(Germany)
Chemical composition, %:
Nickel........................................59 max
Chromium..................................23 max
Molybdenum..............................16 max
Carbon........................................0.01 max
Silicon.........................................0.08 max
Copper.........................................1.6 max
Physical properties:
Density, g/cm3 ..............................8.5
Melting Range, °C........................1335-1380
Thermal conductivity, λ/(W/m·°C), at 100°C .............10.8
Electrical resistivity, μΩ·m..........................................1.28
Coefficient of linear expansion, a/10-6°C-1, at 20-100°C.............12.4
Mechanical properties: (the minimum value detected at room temperature )
Tensile strength, σb/MPa.......................752
Yield strength,σp0.2/MPa..................372
Elongation,σ5 /%............................................63
The way of heat treatment is solution treatment
Available products and specifications:
Bar: ASTM B574
Forging: ASTM B564
Plate/Strip: ASTM B575
Pipe: ASTM B622, ASTM B619, ASTM B626
The metallurgical structure of Hastelloy C-2000:
Hastelloy C-2000 is of the face-centered cubic lattice structure. Its chemical compositions ensure the stability and allergy resistance of the metallurgical structure.
The process performance and requirements of Hastelloy C-2000:
1, The post-weld stress relief treatment is inappropriate to Ni-Cr-Mo alloy at 650°C. Generally, there is no need to do heat treatment. If requiring for stress relieving, it is recommended to conduct absolute solution annealing followed by water quenching.
2, The alloy's thermal processing range is 1080°C-900°C. The cooling method is water-cooling or other rapid cooling. To ensure the best performance of anti-corrosion, thermal processing should be carried out after the solution heat treatment.