Why is 304 stainless steel pipe so good?

[guidebook] : 304 stainless steel pipe because of its long service life, can withstand high temperatures and corrosion resistance by the majority of consumers, but in fact, many people do not know why 304 stainless steel pipe corrosion resistance, why 304 stainless steel pipe performance is so good, today to give you an introduction to the 304 stainless steel pipe of these important points of performance, it is these points of performance determines the excellent quality of 304 stainless steel pipe.

304 stainless steel pipe because of its long service life, can withstand high temperatures and corrosion resistance by the majority of consumers, but in fact, many people do not know why 304 stainless steel pipe corrosion resistance, why 304 stainless steel pipe performance is so good, today to give you an introduction to the 304 stainless steel pipe of these important points of performance, it is these points of performance determines the excellent quality of 304 stainless steel pipe.

First, 304 stainless steel pipe important performance

304 stainless steel tube contains more than 18% Cr, more than 8% Ni, has quite excellent corrosion resistance, due to its corrosion resistance to home its cold working and stamping performance is also good, so often as many industries in the application. 304 stainless steel tube performance determines its processing difficulty, cost, use of the environment, service life and so on.

1, mechanical properties: the mechanical properties of 304 stainless steel tube refers to the mechanical properties in different environments (such as temperature, humidity, medium), subjected to a variety of applied loads (compression, tensile, bending, impact, torsion, alternating stress, etc.) when the mechanical characteristics of the need to comply with the provisions of the mechanical properties. Its plasticity, higher than the 200 series material strength, not easy to brittle fracture.

2, corrosion resistance: can for 304 stainless steel pipe quality requirements in the point is, how the quality of stainless steel pipe, whether it is easy to rust. Experiments have proved that 304 has excellent corrosion resistance and good resistance to intergranular corrosion. For oxidizing acids, experiments have found that 304 has strong corrosion resistance in nitric acid with a concentration of ≤65% below the boiling point temperature. It also has good corrosion resistance to alkaline solutions and most organic and inorganic acids.

3, process performance: 304 stainless steel tube process performance including flattening test, flaring test, bending test. Flaring test is in the top center taper 60 °, the outer diameter of the steel pipe specimen expanded to 6% of the diameter of the pipe, there can be no cracks and cracks, and the inner side of the bending position can not be wrinkled; bending test, the bending angle of 90 °, the bending radius for the outer diameter of the steel pipe 3 times; flattening test is the specimen of the outer diameter flattened to the diameter of the pipe 1 / 3, there can be no cracks and cracks.

Second, 304 stainless steel pipe cold drawing process

To measure the good or bad of a product, can not be smoothly molded and finished product rate is good or bad, the cost-effectiveness of cold forming is an important determinant. 304 stainless steel tube cold drawing, spare parts for general carbon steel, when the actual operating address working temperature is less than -20 ℃, spare parts for low alloy tool steel, the actual operating address working temperature is less than -15 ℃, can not be carried out when the cutting and punching machine. Otherwise, it is very easy to produce cracks under the action of external forces.

304 stainless steel pipe This is due to the fact that, 304 stainless steel pipe are partly used in the operation of cold molding. But there are very many reasons that lead to the cold drawing of 304 stainless steel pipe, and the reasons are relatively complex. If you go to analyze according to metallurgy, the vast majority of the reasons are because it contains too many steel components, in addition to the specifications of the tensile properties are also very important. Therefore, to get a better cold forming, it is necessary to control a good degree.

The above is why the performance of 304 stainless steel tube is so good main content, 304 stainless steel tube mechanical properties determine its bearing strength, in harsh environments can also ensure that it is not easy to fracture, deformation; corrosion resistance determines its application and service life, especially acid, alkali; process performance determines the difficulty of its processing, especially like flaring, bending, and other cold processing, poor process performance will affect the 304 stainless steel pipe Yield rate.