API 5L X60 Pipe, Grade X60 Line Pipe, X60 Carbon Steel Seamless Line Pipe, X60 PSL1/ PSL2 Carbon Steel Pipe Supplier
X60 Seamless line pipe is a high-strength, medium-carbon steel pipe whose chemical composition and mechanical properties are precisely controlled and adjusted to meet specific requirements. The "X" represents pipeline steel, and the number 60 represents its minimum yield strength of 60,000 psi. This means that X60 steel pipe has good strength and toughness when withstanding pressure and load. X60 line pipe is used for oxygen, water and oil transportation pipes in the petroleum and natural gas industries.
Mechanical properties of X60 steel pipe:
Non-proportional extension strength RP0.2 (MPa): 415～565
Tensile strength (MPa): ≥520
Elongation A (%): ≥ 18
X60 Chemical analysis:
C: ≤ 0.21
Si: ≤ 0.45
Mn: ≤ 1.60
V: ≤ 0.15
Nb: ≤ 0.05
X60 steel pipe production process:
The production of X60 steel pipes is mainly carried out through the seamless steel pipe production process. First, high-quality steel billets will be selected, and after pretreatment, they will be perforated by a piercing machine; then, the perforated steel billet will be stretched, wall thickness reduced and other processes through the rolling mill, and finally the X60 carbon seamless steel pipe will be obtained.
Application fields of X60 steel pipe:
X60 steel pipes are widely used in oil and natural gas transmission pipeline systems. Its high strength and corrosion resistance make it ideal for long-distance pipelines, capable of withstanding high pressures and long distances.
X60 steel pipes also have important applications in the chemical industry. Due to its good corrosion resistance, X60 steel pipe can be used to transport various chemical substances, including acid, alkali and salt solutions.
The high strength and toughness of X60 steel pipe make it suitable for various structural projects, such as bridges, buildings and offshore platforms. It can withstand complex mechanical loads and maintain structural stability and safety.
X60 line pipe heat treatment and hardness testing:
The surface heat treatment of X60 line pipe is divided into two categories, one is chemical heat treatment, and the other is surface quenching and tempering heat treatment. The hardness testing method is as follows:
1. Chemical heat treatment of X60 line pipe
Chemical heat treatment is to penetrate the atoms of one or several chemical elements into the surface of X60 pipeline pipe, thereby changing the chemical composition, structure and performance of the surface of X60 pipeline pipe. After quenching and low-temperature tempering, the surface of X60 line pipe has high hardness, wear resistance and contact fatigue strength, while the core of X60 line pipe has high strength and toughness.
The main technical parameters of chemical heat treatment X60 line pipe are the depth of hardened layer and surface hardness. The depth of the hardened layer still needs to be tested with a Vickers hardness tester. Detect the distance from the surface of the X60 line pipe to the point where the hardness drops to 50HRC. This is that the surface hardness testing of the effective hardening depth chemical heat treatment X60 pipeline pipe is similar to the hardness testing of the surface quenching heat treatment The thicker one is thinner, generally no more than 0.7mm. In this case, the Rockwell hardness tester can no longer be used, and a microhardness tester can be used.
If the parts require high local hardness, local quenching heat treatment can be carried out by induction heating. Such X60 pipeline pipes usually need to mark the location of local quenching heat treatment and the local hardness value on the drawing. The hardness testing of X60 line pipe should be carried out in the designated area. The hardness testing instrument can use a Rockwell hardness tester to test the HRC hardness value. If the heat treatment hardened layer is shallow, a surface Rockwell hardness tester can be used to test the HRN hardness value.
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