304H X6crNi18-10 1.4948 Seamless Stainless Steel Tubing 25mm 304 Stainless Pipe
 

304H Stainless steel pipe description

304H stainless steel is a high-carbon version of the widely used austenitic stainless steel grade 304. Here is a description of 304H stainless steel pipes:

1. Stainless Steel Grade: 304H stainless steel is an austenitic stainless steel grade with higher carbon content compared to standard grade 304. The "H" designation stands for high carbon. This higher carbon content provides increased high-temperature strength and improved creep resistance.

2. Heat Resistance: 304H stainless steel pipes offer excellent high-temperature strength and oxidation resistance. They can withstand elevated temperatures up to 870°C (1600°F) in continuous service and up to 925°C (1700°F) in intermittent service. The higher carbon content contributes to the improved high-temperature properties of 304H.

3. Corrosion Resistance: 304H stainless steel pipes exhibit good corrosion resistance in a wide range of environments. They offer resistance to atmospheric corrosion, as well as to many corrosive chemicals and acids encountered in industrial applications. However, the corrosion resistance may be slightly lower compared to the low carbon grades like 304L due to the higher carbon content.

4. High-Temperature Strength: 304H stainless steel pipes retain their strength and mechanical properties even at high temperatures. This makes them suitable for applications in high-temperature environments, such as heat exchangers, boiler components, and exhaust systems.

5. Weldability: 304H stainless steel pipes are readily weldable using common welding techniques. However, preheating and post-weld heat treatment may be required to minimize the risk of carbide precipitation and sensitization, which can lead to intergranular corrosion. It is important to follow recommended welding practices to maintain the corrosion resistance and mechanical properties of the material.

6. Applications: 304H stainless steel pipes are used in various industries, including power generation, chemical processing, oil and gas, and heat treatment. They are suitable for applications requiring high-temperature strength, such as furnace components, heat exchangers, and exhaust systems.

It is important to note that 304H stainless steel is not recommended for applications where sensitization can occur, such as in environments containing high concentrations of chlorides. For such applications, low carbon grades like 304L or stabilized grades like 321 may be more appropriate. When selecting stainless steel pipes, consulting with manufacturers or suppliers can provide specific information on the product's compliance with relevant standards and its suitability for your specific application requirements.
 

304H Stainless steel pipe features

According to different uses, the requirements for various properties of stainless steel pipes are different, such as acid and alkali corrosion resistance, intergranular corrosion resistance and stress corrosion cracking performance, pitting resistance, climate corrosion resistance, high temperature and oxidation resistance. For use in high temperature environment, it is also required to have satisfactory high temperature persistent strength, durable plasticity, creep resistance and aging stability.
 
Stainless steel pipe is mainly used for auxiliary exchanger pipe, water heater pipe, main pipe, cooling water pipe and other pipes. Electricity, as the basis of national economic development, national economy and people's livelihood. The inner wall of the stainless steel pipe is smooth, the water transmission resistance is small, can withstand the erosion of high water flow rate, after solution treatment, the mechanical properties of the pipe and the matrix, the corrosion resistance is basically the same, the performance is excellent, and it is widely used in heaters, boilers, heat exchangers, condensers.
 

Seamless stainless steel pipe production process

China's production of seamless stainless steel pipes is mainly concentrated in Inner Mongolia Baotou Steel, Shanghai Five Steel (Group) Co., LTD., Great Wall Special Steel Co., LTD., Dalian Steel Plant, Fushun Steel Plant, Daye Special Steel Co., LTD., Chengdu Seamless Steel Plant, although the specific process equipment of each production facility is different. However, its production process is mainly divided into hot-rolled seamless stainless steel pipe production process, cold-working seamless stainless steel pipe production process and hot-extruded seamless stainless steel pipe production process.
 
 
304H Stainless steel tube parameter
 
chemical composition

mechanical properties

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The goods shall be delivered in strict accordance with the contract, and the consignee shall be notified within 48 hours after thegoods are delvered: Loading shall be carried out in strict accordance with the requlations. without overloading, bias and weiahtgathering