CrN58V (circle, wire, tube, sheet, strip) (ep795)

Production

This steel grade refers to stainless steel for special purposes, designed for the production of products with high requirements. These are high-strength structural elements of critical application , etc. KhN58 B steel contains 58% nickel and 40% chromium, smelted in vacuum induction furnaces. The composition also includes iron, tungsten, silicon and manganese. Alloying has a multidimensional effect on the quality of steel. Chromium increases hardness and corrosion resistance. Nickel gives the alloy ductility; tungsten makes it hard and red-resistant.

Percentage composition of GOST 5632-72

Mechanical properties of sheet, CrN58 B GOST 24982-81 at ^20o C

Various types of processing (rolling, turning, drawing, stamping, welding) are possible due to the balanced composition and high manufacturability of this steel. KhN58 B rolled steel can be produced in several variants according to specifications of the manufacturing plant. Depending on the requirements of a particular buyer, nickel-based alloys acquire additional strength after heat treatment. Like many other nickel-based alloys, the above composition is characterized by excellent mechanical properties (for a sheet thickness of 3 mm):

-tensile strength - up to 980 ^N/mm2;

Elongation-ratio in the range of 35-50%;

-Relative narrowing - up to 50%:

Relevance

Stainless steel of this grade has such advantages as heat resistance, corrosion resistance, can withstand the effects of aggressive gaseous, liquid media in a wide temperature range. This steel grade is used in the production of gas turbine engine parts, welded chemical equipment operating in aggressive media (in hydrochloric, phosphoric, sulfuric acid solutions) at temperatures from -70 to + 500 °C, and a pressure of ~5 N/mm². Steel of this grade is the basis for a variety of rolled products - strips, wires, sheets, strips, pipes, etc. The disadvantage is the presence of sulfur in the composition, it can form a sulfide film on the surface of nickel alloys, making the metal more brittle and brittle at high temperatures. Typically, this grade of plate is used in the manufacture of pickling pools and in welded structures with high corrosion resistance requirements. This alloy is especially popular for installations operating in an aggressive nitrogen-acid environment with the presence of fluorides.

Supplier

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