Stainless steel plate with high content of nickel in the x70 line pipe active state has low corrosion rate. The use of 904 l can be as high as 40 degrees Celsius temperature. Its corrosion resistance is very good. In wet process of industrial phosphoric acid, impurity against corrosion has a strong influence. In all the various kinds of phosphate, 904 l stainless steel corrosion resistance is superior to the ordinary. In strong oxidizing nitrate, 904 l compared with not high alloying steel containing molybdenum, low corrosion resistance. In this concentration range. Good corrosion resistance to the conventional stainless steel 904 l.

Stainless steel plate steel has high corrosion resistance. The crevice corrosion resistance in chloride solution is also very good. 904 l high nickel content, reduced the hemp pit and the corrosion rate of gaps. Ordinary austenitic stainless steel when temperature is higher than 60 degrees Celsius, in a rich chloride environment sensitive to stress corrosion may be, by improving the nickel content of stainless steel, can reduce the sensitization. Because of the high content of nickel, 904 l in chloride solution, concentration of hydroxide solution and rich hydrogen sulfide environment, has the very high resistance to stress corrosion cracking ability.

Stainless steel alloy is a kind of multi-purpose material, can be uns c68700 applied in many fields of industry, petroleum, petrochemical equipment, such as petrochemical equipment in the reactor, the storage and transportation of the sulfuric acid equipment, such as heat exchangers, power plant flue gas desulfurization device, main use parts: absorption tower of the tower body, the flue, door plank, internal parts, spray system, etc., organic acid scrubber and the fan in the processing system.

Stainless steel plate has been standardized in many countries, and can be used in fabrication of pressure vessels has been approved. 904 l alloy and other commonly used CrNi austenitic steel has good resistance to pitting corrosion and crevice corrosion ability, high resistance to stress corrosion cracking ability, good ability of intergranular corrosion resistance, good weldability and workability. When the hot forging heating temperature can uns c70600 reach 1180 degrees Celsius, cold heating, quick. This steel is common welding technology used for welding, when using manual arc welding when the welding is not more than 6 mm plate electrode is not greater than 2.5 mm in diameter; When electrode thickness greater than 6 mm diameter less than 3.2 mm.

Stainless steel plate is fully austenitic organization, in the general high molybdenum content than austenitic stainless steel 904 l is not sensitive to precipitation of ferrite and alpha phase, due to the 904 l carbon content is very low, so in the case of the general heat treatment and welding, there would be no carbide precipitation. This eliminates the general heat treatment after welding and appear in the danger of intergranular corrosion. Because of the high nickel chrome molybdenum content, and add the copper, so 904 l even in the reducing environment, such as sulfuric acid and formic acid can also be in the passivation.