Stainless Steel Seamless Pipe has strong corrosion resistance and is easy to process into various shapes of steel. It has good welding performance and no tendency to be cold and brittle. Therefore widely used.
The stainless steel seamless pipe does not undergo a phase change, wherein the heat treatment is to heat to a high temperature to solidify during the process. The stainless steel seamless tube has a low thermal conductivity, and the thermal conductivity can be increased after rising to a high temperature. Stainless steel seamless pipe heating is based on the solid solution rate of the carbide. A312 304L Stainless Steel Pipe's carbide takes 3 seconds at 1065 degrees Celsius, 1.5 seconds at 1176 degrees Celsius, and 10 seconds at 1000 degrees Celsius. From this point of view, the higher the heating temperature of the stainless steel seamless pipe, the better. However, the higher the heating temperature, the other defects occur at the same time. Will result in a decrease in tensile strength.
Stainless Steel Seamless Pipe
How to distinguish the good and bad of thick-walled seamless steel pipe?
1. The shoddy thick-walled seamless pipe material contains many impurities, the density of the steel is small, and the size is too bad, so in the absence of the vernier caliper, it can be weighed and checked.
2. The shoddy thick-walled seamless pipe has no metallic luster and is light red or similar to pig iron. There are two reasons for its blank being adobe. The temperature of the fake inferior material rolling is not standard, and the temperature of the steel is measured by visual inspection, so that the rolling can not be carried out according to the specified austenite region, and the performance of the thick-walled seamless pipe is naturally unable to reach the standard.
3. The surface of the thick and thick seamless pipe is prone to scarring. There are two reasons for this: 1 Inferior thick-walled seamless pipe material is uneven and has many impurities. 2 fake inferior material manufacturers guide equipment is simple, easy to stick steel, these impurities are easy to produce scars after biting people.
4. The composition of the good thick-walled seamless pipe is uniform, the tonnage of the cold-shearing machine is high, the end face of the cutting head is smooth and tidy, and the fake inferior material is often poor in material, and the end face of the cutting head often has a phenomenon of falling meat, that is, unevenness, and No metallic luster. And because the fake inferior products manufacturers have fewer heads, big ears will appear at the head and tail.
5. The cross-section of the counterfeit thick-walled seamless pipe is elliptical. The reason is that the manufacturer has to reduce the amount of the two rolls in front of the finished roll in order to save material. The strength of the rebar is greatly reduced, and it does not conform to the rebar. The standard of the dimensions.
6. The surface of the fake inferior material is prone to cracks because the billet is adobe, the adobe has many pores, and the adobe is cracked by the action of thermal stress during the cooling process, and cracks occur after rolling. Our company is Seamless Stainless Steel Tubing Supplier, welcome to come to us.
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