Product origin:

Nippon Steel / Nippon metallurgy / ottokunp, Sweden

Executive standard:

ASTM A240/ASME SA-240、ASTM A276、ASTM A182/ASME SA-182、ASTM A312/ASMES A312

Main ingredients:

Carbon (c) ≤ 0.02, manganese (MN) ≤ 1.00, nickel (Ni) 17.5 ~ 18.5, silicon (SI) ≤ 0.8, phosphorus (P) ≤ 0.03, sulfur (s) ≤ 0.01, chromium (CR) 19.5 ~ 20.5, copper (Cu) 0.5 ~ 1.0, molybdenum (MO) 6.0 ~ 6.5, nitrogen (n) 0.18 ~ 0.22

Physical properties:

254SMO density: 8.24g/cm3, melting point: 1320-1390 ℃, magnetism: None

Mechanical properties:

Tensile strength: σ B ≥ 655mpa, yield strength σ B ≥ 310mpa: elongation: δ ≥ 35%, hardness: 182-223 (HB)

Corrosion resistance:

254SMO stainless steel is a kind of super austenitic stainless steel with high corrosion resistance. It is developed for the environment of halide and acid. It is widely used in harsh working conditions such as high concentration chloride ion medium and seawater. In various industrial occasions of acid medium, especially in the acid containing halide, 254SMO is far superior to other stainless steels, and can be comparable with Hastelloy and titanium in some cases. With low carbon content and high molybdenum content, it has good pitting corrosion resistance, crevice corrosion resistance and excellent intergranular corrosion resistance. It is a kind of cost-effective stainless steel, which is widely used in the fields of chemical industry, desulfurization and environmental protection at home and abroad. In pure sulfuric acid, 254SMO has much greater corrosion resistance than 316 ordinary stainless steel. However, at high concentration, the corrosion resistance of 254SMO is slightly weaker than that of 904L (no8904) stainless steel. In sulfuric acid containing chloride ions, 254SMO has the greatest corrosion resistance. Since local corrosion and uniform corrosion may occur, 316 ordinary stainless steel cannot be used in hydrochloric acid, but 254SMO can be used in diluted hydrochloric acid at general temperature. There is no need to worry about pitting corrosion in the area below the boundary line. But we must try to avoid the existence of cracks. In fluosilicic acid (h2sif4) and hydrofluoric acid (HF), the corrosion resistance range of ordinary stainless steel is very limited, while 254SMO can be applied in a wide range of concentration and temperature.

Application fields:

Petroleum and petrochemical equipment, such as bellows in petrochemical equipment, pulp and paper bleaching equipment, such as pulp digesters, bleaching equipment, barrel tanks and pressure rollers for filter scrubbers, flue gas desulfurization devices in power plants, mainly used in: tower body, flue, gate plate, internals, sprinkler system, etc. of absorption tower, offshore system or seawater treatment, such as thin-walled condensing pipes cooled by seawater in power plants, seawater desalination treatment equipment It can be used even in equipment where seawater may not flow, desalination industry, such as salt making or desalination equipment, heat exchangers, especially in the working environment with chloride ions.

Supporting welding materials:

254SMO is welded with high configuration 625 alloy series welding materials, i.e. ERNiCrMo-3 welding wire and enicrmo-3 welding rod. The welding material size is Φ 1.0、1.2、2.4、3.2、4.0

Supply style:

Plates, strips, bars, wires, forgings, light rods, welding materials, flanges, etc. can be processed according to the drawing. Welcome to inquire