The ability of a metal material to resist indentation by a hard object is called hardness. According to different test methods and application ranges, the hardness standards of sanitary stainless steel precision tubes can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness and microhardness. 1. What are the characteristics of high hardness pipes of sanitary stainless steel precision pipes? Quenching, tempering and annealing can be used for high hardness pipes. As hardness increases, tensile strength and yield strength increase, while elongation, cross-sectional shrinkage, and impact energy decrease. In addition, the corrosion resistance of high-hardness pipes mainly depends on the chromium content, and the carbon in the steel indirectly affects the corrosion resistance of the steel due to the formation of stable chromium carbide with chromium. Therefore, the lower the carbon content, the higher the corrosion resistance, and the order of corrosion resistance and strength is reversed. Therefore, when processing high-hardness products, in order to improve the strength and hardness of sanitary stainless steel precision tubes, the carbon content will increase, resulting in reduced product plasticity and corrosion resistance. Therefore, the corrosion resistance of products processed from sanitary stainless steel precision tubes is poor. 2. What is high...
The maintenance of sanitary stainless steel precision pipe is one of the most important factors to prolong the service life of stainless steel pipe. So how should you maintain it when using it? Sanitary grade stainless steel precision tube Its hardness HBW≤187HRB≤90HV≤220 Tensile strength ≥480MPa Elongation ≥40% Yield strength ≥175MPa Density 7.98/cm3 Sanitary grade actual melting point is 1375-1450 ℃, solid solution 1010-1150 during use ℃ rapid cooling. Due to the addition of Mo, the sanitary stainless steel precision pipe has excellent corrosion resistance; the daily maintenance precautions of the sanitary stainless steel pipe, the high temperature strength is also very good; what everyone needs to know here is the excellent work hardening (weak magnetism after processing); The solid solution state is non-magnetic. Sanitary seamless pipe has good resistance to chloride corrosion. In various media such as seawater, its corrosion resistance is better than 0Cr18Ni9. Now its application range is mainly used as a pitting corrosion-resistant material for products with special requirements for intergranular corrosion; due to its large carbon content, it reaches 0.03. It can be used for welding requirements Applications for post annealing and high corrosion resistance. Sanitary stainless steel precision pipes are mainly used in seawater equipment,...
What is the difference between sanitary stainless steel precision tube and stainless steel ordinary tube? 1. Dimensional accuracy of stainless steel pipes The fundamental difference between sanitary stainless steel precision tubes and ordinary tubes lies in their precision. Ordinary stainless steel pipes are commonly used in decorative and industrial applications. The pipe diameter tolerance is small, and the pipe diameter tolerance accuracy is generally greater than ±0.1mm. Precision stainless steel pipes pay more attention to the requirements of pipe diameter tolerance, which are generally controlled within ±0.05mm. Due to its high precision, it can be applied in more fields than decoration and industry, such as machinery, aviation, electronics and electronics, automobiles, etc. 2. Surface treatment of stainless steel pipes The surface treatment of sanitary stainless steel precision pipe is stricter than that of ordinary stainless steel pipe. The surface of the precision stainless steel pipe has the following requirements: the surface of the pipe body is free of scratches and scars; the wall thickness is uniform and smooth, the nozzle is complete and free of burrs; the inner wall should be flat, and there should be no leaking sand holes at the weld. In general, the surface of ordinary pipes...
High-temperature alloys are divided into three types of materials: 760 ℃ high temperature materials, 1200 ℃ high temperature materials and 1500 ℃ high temperature materials, with a tensile strength of 800MPa. In other words, it refers to high-temperature metal materials that work for a long time at 760–1500 °C and under certain stress conditions. It has excellent high-temperature strength, good oxidation resistance and thermal corrosion resistance, good fatigue performance, fracture toughness and other comprehensive properties. It has become an irreplaceable key material for the hot end components of military and civilian gas turbine engines. Classification 760℃ high temperature material deformation superalloy Deformed superalloy refers to a class of alloys that can be processed by hot and cold deformation, with a working temperature range of -253 to 1320 °C, good mechanical properties, comprehensive strength and toughness indicators, and high oxidation resistance and corrosion resistance. According to its heat treatment process, it can be divided into solid solution strengthened alloy and aging strengthened alloy. The first digit after GH indicates the classification number, namely 1, solid solution strengthened iron-based alloy 2, age-hardened iron-based alloy 3, solid solution strengthened nickel-based alloy 4, cobalt-based alloy after GH, the second, third, and fourth digits Numbers...
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