The 347 stainless steel pipe, due to its excellent mechanical properties, is widely used in high-temperature chemical equipment, petroleum refining and petrochemical industries, as well as boiler heat exchangers. Its strength indicators are comparable to those of 304 stainless steel, but it has superior high-temperature performance while maintaining good plasticity and toughness.
The yield strength is an important indicator for measuring the plastic deformation of materials. The yield strength (Rp0.2) of 347 stainless steel pipes is usually not lower than 205 MPa. This indicator ensures that the pipeline has sufficient safety margin when subjected to internal pressure and external loads, preventing excessive plastic deformation. Under high-temperature conditions, the yield strength retention rate of 347 stainless steel pipes is better than that of ordinary 304 stainless steel, and it is suitable for working environments ranging from 400°C to 800°C.
Tensile strength reflects the maximum load-bearing capacity of a material during the stretching process. The tensile strength (Rm) of 347 stainless steel pipes is generally no less than 515 MPa, and is usually controlled within the range of 515 MPa to 690 MPa. Higher tensile strength ensures the safety and reliability of the pipeline under complex stress conditions such as pressure fluctuations, thermal stress, and installation stress.
Hardness is the ability of a material to resist local deformation. The Brinell hardness (HB) of 347 stainless steel tubes is usually no more than 201, and the Rockwell hardness (HRB) is approximately 90. The appropriate hardness not only ensures the wear resistance of the material but also takes into account the processing performance, making it convenient for subsequent operations such as cutting, bending pipes, and thread processing.
In addition to the above indicators, the elongation after fracture of 347 stainless steel tubes is generally no less than 35%, indicating that it has excellent plasticity and can meet the requirements of forming processes such as cold bending, expansion, and flattening. At the same time, the material can still maintain good creep resistance and ultimate strength at high temperatures, and is suitable for long-term high-temperature service conditions.
Jiangsu Cunrui Metal Products Co., Ltd. The mechanical performance indicators of the 347 stainless steel pipes supplied strictly comply with the ASTM A312 and GB/T 14976 standards. Each batch of products comes with a mechanical performance test report to ensure stable and reliable quality.
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