Nickel Alloys

Alloy 200

Commercially pure nickel with good mechanical properties and excellent resistance to many corrosive media. Important characterstics are its magnetic and magnetostricive properties, the high thermal and electrical cnductivity at low gas content.

Alloy 201

Alloy 201 is a low carbon modification of Alloy 200. This alloy has a low annealed hardness and very low work- hardening rate that is desirable for cold forming operations such as deep drawing, spinning, coining, etc. It has been used in corrosion-resistant equipment such as caustic evaporators, in spun anodes,combustion boats and laboratory crucibles, and electronic components where its excellent fabricating characteristics provide some advantage.

Alloy 400

Alloy 400 is especially resistant to saline and other acids in ventilated condition. It is successfully employed in the salt winning process. Alloy 400 is especially suited for employment in sea brackge water at high speed, where resistance against cavitation and erosion is of great importance. This alloy is very resistant to solvents, glass-etching agents, sulfuric and other acids and virtually to all alkalis.This grade is not sensitive to stress corrosion cracking in oxidising media. Alloy 400 can be employed at temperatures up to 550 degrees celsius.

Alloy K-500

Alloy K-500 combines the excellent corrosion resistance characteristic of Alloy 400 with the added advantages of greater strength and hardness. The increased properties are obtained by adding aluminum and titanimum to the nickel-copper base, and by heating under controlled conditions. The thermal processing used to effect precipitation is commonly called age hardening or aging. Alloy k-500 retains its strength up to temperature of about 650 degrees Celsius.

Alloy 600

Alloy 600 has excellent has excellent resistance to oxidation at temperatures uoto 1175 degrees celsius and is also resstant to a variety of corrosive media. It retains its high strength uo to about 650 degree celcius. Even at lowest temperatures, alloy 600 has good mechanical properties. Due to its resistance to chloride stress corrosinon cracking, alloy 600 is employed in components of power plants. This grade can be welded without thermal retreatment.

Alloy 601

Alloy 601 has very good properties at high temperature and is oxidation resistant as well ws scale resistant at temperatures of up to 1250 degree celcius. The high chromium content results in good resistance against oxidation, carburisation and sulfurious media. The aluminum and nickel content result in a further improvement of the oxidation resistance.

Alloy 625

Excellent corrosion resistance with high strength and ductility at temperature upto 700 degree celcius- applicable upto 1100 degree celcius. Alloy 625 is weldable without thermal retreatment. Alloy 625 is a nonmagnetic , corrosion – and oxidation-resistant, nickel-based alloy. The alloy has excellent fatigue strength and stress-corrosion cracking resistance to chloride ions. Some typical applications for alloy 625 have included heat shields, furnace hardware, gas turbine engine ducting, combustion liners and spray bars, chemical plant hardware, and special seawater applications.

Alloy 800/ H /HT

Alloy 800 is an iron-nickel-chromium alloy with moderate strength and good resistance to oxidation and carburization at elevated temperatures. It is particularly useful for high-temperature equipment in the petrochemical industry because the alloy doesn’t form the embrittling sigma phase after long time exposure at 1200°F (649°C). Excellent resistance to chloride stress-corrosion cracking is another important feature of alloy 800. Alloy 800H is a solution heat treated (2100°F/1150°C), controlled-carbon version of alloy 800 with improved elevated temperature properties. It has improved creep and stress-rupture.

Alloy 825

Alloy 825 is a nickel-iron-chromium-molybdenum alloy with good corrosion resistance to sulfuric and phosphoric acids and sea water. It is similar to alloy 800 but with improved resistance to aqueous corrosion. Although not fully resistant to stress-corrosion cracking in boiling magnesium chloride, alloy 825 has good resistance in neutral chloride media. Alloy 825 has good resistance to reducing acids. It can be employed without thermal treatment after the welding process.

Alloy C-276

Today probably one of the best and manifold alloys on the market, hen employed in extremely corrosive, reducing and oxidising applications. Alloy C-276 has excellent resistance to strong oxidising media contaminated by chloride, dry chloride acid formate acid, acetic acid, acetic hydride solutions, sea water solutions and saline solutions. The alloy is resistant to the corrosive influence of wet hydrochloride acid, hydrochloride chlorine dioxide solutions.

Alloy C-22

It is a versatile nickel-chromium-molybdenum alloy with better overall corrosion resistance than other Ni-Cr-Mo alloys available today. Alloy C-22 has outstanding resistance to pitting, crevice corrosion and stress-corrosion cracking. It has excellent resistance to oxidizing aqueous media including acids with oxidizing agents, wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions. Alloy C-22 has exceptional resistance to a wide variety of chemical process environments, including strong oxidizers such as ferric and cupric chlorides, chlorine, formic and acetic acids, acetic anhydride, and seawater amd brine solutions.

Hastelloy B-2

Alloy B-2 is an improved wrought version of Hastelloy B. Alloy B-2 has the same excellent corrosion resistance as alloy B, but with improved resistance to knife-line and heat-affected zone attack. This alloy resists the formation of grain-boundary carbide precipitates in the weld heat-afftected zone, thus making it suitable for most chemical process applications in the as-welded condition. Alloy B-2 also has excellent resistance to pitting and stress-corrosion cracking.Alloy B-2 is particularly well suited for equipment handling hydrochloric acid at all concentrations and temperatures including the boiling point. It is also resistant to hydrogen chloride gas, and sulfuric, acetic, and phosphoric acids.

Alloy 20

Alloy 20 is a high-alloyed stainless steel . Its corrosion properties surpass those of usual stainless qualities. For example, alloy 20 has excellent stress corrosion to boiling 20-40% sulfuric acid. Although alloy 20 was originally developed for usage in sulfuric enviornment, its range application has been steadily extended and today also includes machining of artificial rubber, plastic, synthetic fiber etc. In pharmaceutical and food producing application, where purity has to be guaranteed, Alloy 20 is employed to prevent metallic contamination. The most important advantages of this grade are its excellent mechanical properties as well as its comparitively easy machineability.