There are significant differences between seamless steel pipe and 304 stainless steel pipe in many aspects, which are mainly reflected in material, performance, use, manufacturing process and price. The following is a detailed analysis of these differences:

1. Material and composition
Seamless steel pipe: Seamless steel pipe has various materials, commonly used are carbon structural steel, low alloy structural steel or alloy structural steel, such as 10#, 20#, 35#, 45#, 16Mn, etc. These steels have different chemical compositions and mechanical properties and are suitable for different application scenarios.

304 stainless steel pipe: 304 stainless steel pipe specifically refers to steel pipe made of 304 stainless steel. 304 stainless steel is a chromium-nickel stainless steel with excellent corrosion resistance, containing about 18% chromium (Cr) and 8% nickel (Ni), as well as a small amount of carbon (C), silicon (Si), manganese (Mn) and other elements.

2. Performance characteristics
Seamless steel pipe: Seamless steel pipe has good mechanical properties and processing properties, can withstand high pressure, and has smooth inner and outer surfaces and precise dimensions. In addition, seamless steel pipes also have good corrosion resistance and high temperature resistance, but the specific performance depends on its material.

304 stainless steel pipe: 304 stainless steel pipe is known for its excellent corrosion resistance and can resist the erosion of most chemical media, including acidic, alkaline and saline solutions. At the same time, it also has good high temperature resistance and mechanical properties, can withstand working conditions in high temperature environments, and maintain stable performance.

3. Uses
Seamless steel pipe: Seamless steel pipes have a wide range of uses, including but not limited to petroleum geological drilling pipes, cracking pipes for petrochemicals, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation. They are mainly used for conveying fluids, manufacturing structural parts and mechanical parts, etc.

304 stainless steel pipe: 304 stainless steel pipes are also widely used in many fields, including construction, chemical industry, oil and gas, food processing, etc. In the construction industry, it is often used in indoor and outdoor piping systems, HVAC systems, sanitary equipment, etc.; in the chemical industry, it is suitable for piping systems in chemical plants; in the oil and gas field, it is often used for transportation pipelines, storage tanks and oil equipment; in the food processing field, it meets food hygiene requirements and is suitable for food processing equipment and piping systems.

4. Manufacturing process
Seamless steel pipe: The manufacturing process of seamless steel pipe mainly includes hot rolling, cold rolling or cold drawing. These processes can process steel ingots or solid tube billets into seamless steel pipes with smooth inner and outer surfaces and precise dimensions.

304 stainless steel pipe: The manufacturing process of 304 stainless steel pipe varies according to its specific type and use. Generally speaking, it can be made by hot rolling, cold rolling or welding. Among them, welded stainless steel pipe is made of stainless steel plate or steel strip with welding seams; while seamless stainless steel pipe is made by perforation, hot rolling, cold rolling or cold drawing, without welding seams.

5. Price
In general, the price of seamless steel pipe is relatively high, especially high-precision and high-quality seamless steel pipe. This is mainly because of its complex manufacturing process and high cost.

In contrast, the price of 304 stainless steel pipes may vary depending on the material, specification and manufacturing process. But in general, due to the wide application of 304 stainless steel and the intensification of market competition, its price is relatively stable.

In summary, there are significant differences between seamless steel pipes and 304 stainless steel pipes in terms of material, performance, use, manufacturing process and price. When choosing, it is necessary to make comprehensive considerations based on specific application scenarios and needs.
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