Hastelloy C2000

UNS N06200 | ASTM B619 | Werkstoff Nr 2.4675 | AWS 055 | Hastelloy C2000 | ASTM B619 | DIN 2.4675


High performance alloys have the capacity to function at very high temperatures and in severe mechanical stress environments, and also where high surface stability is required. They have good creep and oxidation resistance, and can be produced in a variety of shapes. They can be strengthened by solid-solution hardening, work hardening, and precipitation hardening. There are three groups of alloys, namely cobalt-based, nickel-based, and iron-based alloys.

Hastelloy C2000 is a face centered cubic lattice with small stacking fault energy, annealing twins are readily produced subsequent to mill annealing. The lamellar twin created at the trigeminal grain boundary by collecting fault nucleation derived from the presence of stacking faults, results in decreasing the interfacial energy and mean free path of dislocation. The development of oxide scales is monitored by external diffusion of interstitial cation. The development rate of oxide layer is extensively larger in annealing twins as compare to that in other regions of large density of the interstitial cation.

Surface oxide layers produced on Hastelloy C2000 samples are developed in different colors and bump structures after isothermal oxidation. The oxide layers on annealing as well as non-annealing twins are comparatively uniform derived from a balanced growth stress and spalling from alloy substrate is inhibited. The oxides of manganese and iron are produced on the sample’s surfaces at the temperatures above 1000oC. The content of molybdenum in oxide is more at 800oC than 1000oC. At 1000oC, the oxide layer’s thickness is about 8 micro-m and internal oxide hooks also develop into alloy matrix that enhances the interaction force between oxide scales and alloy matrix.

Hastelloy C2000 is the topmost superalloy offering unrivaled character in all kinds of possible acidic conditions (both reducing and oxidizing type)

Hastelloy C2000 is a nickel-chromium–molybdenum alloy. It is most commonly available in wrought forms at the mill level. The following datasheet gives an overview of Hastelloy C2000.

Hastelloy C2000 offers excellent resistance to sulfuric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid, organic acid, chlorides, alkalis, pitting and crevice corrosion and stress corrosion cracking. Heanjia Super-Metals produces complete line of product forms of Hastelloy C2000 settled by ASME and ASTM standards. Alloy C2000 is easily formed, machined and welded into the industrial parts.

Alloy C2000 is featured with broad applicability among the series of Hastelloy alloys. It is manufactured to prevent corrosion in the wide range of corrosive chemicals. As compare to traditional Nickel-Chromium-Aluminum (Ni-Cr-Mo) alloys that were made for applications in oxidizing or reducing media, alloy C2000 can be successfully used in both kinds of conditions. Its composition contains molybdenum and copper that offer great resistance in reducing conditions while resistance to oxidizing acid is given by a considerable magnitude of chromium about 23%.

Considering its role in engineering sector, C-2000 alloy has significant potential for manufacturing enhancement in the plant applications. It replaced the traditional Hastelloy alloys providing better corrosion resistance in the specific conditions as well as enhanced equipment’s service life such as reactors, valves, pumps and heat exchangers, in the troubling condition. Its contribution in the industrial procedures has significantly lowered the process cost. For instance, a reactor made for handling hydrochloric acid extract can later be used in handling the process that may involve use of nitric acid. The multi- uses of Hastelloy C2000 alloy make it an outstanding nickel based alloy in handling the various process streams.

Chemical Composition

The following table shows the chemical composition of Hastelloy C2000.

Element Content (%)
Nickel, Ni 59
Chromium, Cr 23
Molybdenum, Mo 16
Copper, Cu 1.6
Silicon, Si 0.080
Carbon, C 0.010

Physical Properties

The physical properties of Hastelloy C2000 are highlighted in the following table.

Properties Metric Imperial
Density 8.50 g/cm³ 0.307 lb/in³

Mechanical Properties

The mechanical properties of Hastelloy C2000 flat products are given in the following table.

Properties Metric Imperial
Tensile strength (@ thickness 25.4 mm/ 1.00 in.) 752 MPa 109000 psi
Yield strength (@ 20°C/ 68°F, thickness 12.7 mm/0.5000 in, 0.2% offset) 345 MPa 50000 psi
Elongation at break (@ thickness 6.35 mm/0.250 in., in 50.8 mm) 62% 62%

Thermal Properties

The thermal properties of Hastelloy C2000 are outlined in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@ 25-100°C/ 77-212°F) 12.4 µm/m°C 6.89 µin/in°F
Thermal conductivity 9.10 W/mK 63.2 BTU in/hr.ft².°F


Hastelloy C2000 can be used in applications requiring high metallurgical stability in reducing or oxidizing atmosphere. It is also used in chemical process equipment applications.


Werkstoff Nr 2.4675
AWS 055
DIN 2.4675


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