Large Strength and Corrosion Resistance – Stainless Steel 2507

The stainless steel 2507 is comprised of 25% Cr, 4% Mo and 7% Ni produced for the industrial applications that need large strength and resistance to corrosion, chemical process, petrochemical and sea water devices. The steel wire offers superior resistance to chloride stress corrosion cracking, large thermal conductivity and nominal coefficient of thermal expansion. The large concentration of chromium, molybdenum and nitrogen offer superior resistance to pitting, crevice and natural corrosion.

The stainless steel 2507 offers large impact strength and used for various applications that is widely subjected to the temperatures over 570oF due to loss of hardness. The 2507 wire is utilized in the oil and gas industry devices, offshore platforms, hear exchanging device, methods and operation water equipments, fire systems, injection and weight equipments, chemical processing, heat exchanging device, containers, pipes, desalination operations, large pressure RO treatment and seawater pipes, mechanical and structural parts, large strength, resistance to corrosion components, Power industry, industrial scrubber system, absorber tower and piping.

The high concentration of chromium and molybdenum in stainless steel 2507 makes it resistant to corrosion caused by organic acids such as formic acid, acetic acid, resistance to inorganic acids primarily chlorides. In the liquid sulfuric acid consisting of chlorides, 2507 wire offers superior resistance to corrosion as compare to 904L wire that has large alloyed austenitic steel offers wide resistance to sulfuric acid.

The stainless steel 316L is not preferred to use in hydrochloric acid environment due local resistance and uniform corrosion. The 2507 can be utilized in the presence of hydrochloric acid. The pitting may not be a risk in this region though crevice should be inhibited. The lower concentration of carbon in 2507 decreases the risk of carbide precipitation at the grain boundaries while heat processing, so it offers wider resistance to the intergranular corrosion.

The Duplex stainless steel 2507 offers superior resistance to chloride stress corrosion cracking. Due to large alloy concentration, 2507 wire offers extensive resistance to corrosion and has high strength. It is widely purposeful in offshore oil and gas operations and wells with large brine levels or that need brine injected to increase recovery. Different analysis methods are followed to obtain the pitting resistance of steels in the chloride solutions.

The critical pitting temperatures of different high performance steels in 1M sodium chloride solution is evaluated. The results show the superior resistance obtained by Stainless steel 2507 to the pitting corrosion. The presence of crevice can not be inhibited in the practical manufacturing processes and operations. The presence of crevices can not be inhibited in the manufacturing and operations that make it more prone to the corrosion in the chloride conditions. The stainless steel 2507 offers excellent resistance to crevice corrosion.

The chemical composition of Stainless steel 2507 is given by following:

C Cr Ni Mo N Others
0.020 25 7 4.0 .27 0.001
Remaining ≥ 40 %

The combination of large tensile strength and impact strength with lower coefficient of thermal expansion and large thermal conductivity makes this alloy superior for many applications.

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Isha Changotra has wide experience in metals industry and is working for a renowned super alloys manufacturer located in China and United States. With extensive insight in metals and high performance super alloys, she aims to provide most useful information for folks engaged under this niche.

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Posted in stainless steel 2507 wire

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Super metals and alloys

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