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CORROISON-RESISTANT ALLOYS - NICKEL BASIS

Nickel 200/201

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 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

An age-hardening alloy with the same corrosion resistance as Alloy 400, though with increased tensile strength and hardness. 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 retreatmnt.

Alloy 800 (H)

This alloy is resistant to corrosion resulting from hydrogen and hydrogen sulfide as well as to stress corrosion cracking. It is highly heat resistant and insensitive to the seperation of sigma phase. alloy 800 H with controlled carbon content improves furthermore the creep strength depending on time in solution annealed condition.

Alloy 825

Resistance to sulfuric acid, phosphoric acid solvents and sea water as well as to many oxidising chemicals. 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-4

Excellent resistance against strong oxidising agents, hotcontaminated miniral acids, solvents, chlorine and media contaminated by chlorine (organic and inorganic),dry chloric acid, formic acid, acetic acid, acetic hydride solutions, sea water solutions and saline solutions. This alloy has high ductility and corrosive resistance even in temperature range of 650-1040 degree celcius. Alloy C-4 is resistant against the formation of grain boundary carbides and can thus be used in most cases without heat-treatment after welding.

Alloy G-3

Employment in oxidising and reducing media especially in applications where phosphoric acid, sulfuric acid are used and as power plant fume scrubbers.Alloy G-3 has high resistance to pitting corrosion and stress corrosion crcking.

Alloy DS

Alloy Ds is a heat resistant Ni-Cr-Fe alloy wiht Si addition for the employment at high temperatures where sufficent strength and corrosive resistance are required. Alloy DS is heat-resistant up to 1100 degree celcius when in fresh air. This alloy is especially resistant against changing oxidising/reducing conditions as well as the formation of sigma phase in the critical temperature range of 590-870 degree celcius. Furthermore it is green rot. Due to high strenght and heat resistance to alloy DS, smaller sections than usual can be manufactured from this material.

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.