API 5L X60 is a grade of the API 5L specification, which covers line pipe steel used in the transportation of oil, gas, and other fluids. Here are the key material properties for API 5L X60:

Chemical Composition (Typical):

Carbon (C): ≤ 0.26%

Manganese (Mn): 1.40% - 1.65%

Phosphorus (P): ≤ 0.030%

Sulfur (S): ≤ 0.030%

Silicon (Si): 0.15% - 0.40%

Nickel (Ni): ≤ 0.50%

Chromium (Cr): ≤ 0.50%

Copper (Cu): ≤ 0.50%

Vanadium (V): ≤ 0.10%

Molybdenum (Mo): ≤ 0.15%

Niobium (Nb): ≤ 0.05%

Mechanical Properties:

Yield Strength (YS):

Minimum: 415 MPa (60,200 psi)

Tensile Strength (TS):

Minimum: 520 MPa (75,400 psi)

Elongation:

Minimum: The elongation depends on the pipe’s wall thickness and diameter, typically around 19-23% for standard pipe dimensions.

Other Properties:

Impact Test:

For PSL2 pipes, the Charpy V-Notch impact test is required and should meet specified energy absorption requirements, typically at temperatures as low as -50°C, depending on the application.

Hardness:

Typical hardness ranges are not standardized but generally should not exceed 22 HRC.

Additional Notes:

API 5L X60 is commonly used in pipelines that transport natural gas, oil, and water, often under high pressure.

PSL1 vs. PSL2: API 5L X60 pipes can be produced in PSL1 and PSL2 levels, with PSL2 having stricter chemical composition and testing requirements.

Applications:

Used in the oil and gas industry for high-pressure transmission pipelines.

Suitable for environments that require high toughness and strength.

The specific material properties can vary depending on the pipe manufacturer and the exact requirements of the end application.