API 5L X56 Seamless Steel Tube is a high-strength and high toughness pipeline steel material mainly used for oil and gas transportation pipelines. The yield strength grade of API 5L X56 is L390 Seamless Steel Tube, corresponding to a yield strength of 390MPa and a tensile strength range of 490MPa to 760MPa.

Chemical composition and mechanical properties

The chemical composition of API 5L X56 Seamless Steel Tube includes:

Carbon (C): Maximum 0.28%

Manganese (Mn): maximum 1.40%

Phosphorus (P): maximum 0.030%

Sulfur (S): maximum 0.030%

In addition, the mechanical properties of API 5L X56 include:

Yield strength: 390MPa to 545MPa

Tensile strength: ≥ 490MPa to 760MPa

Yield ratio: ≤ 0.93.

Application areas and characteristics

API 5L X56  Seamless Steel Tube/seamless steel pipe is mainly used for oil and gas transmission pipelines, with excellent strength and corrosion resistance, able to withstand high pressure and harsh environmental conditions. It is suitable for extracting and transporting oil and natural gas from underground to various industrial enterprises. In addition, API 5L X56 seamless steel pipe can maintain good toughness under low temperature conditions, ensuring the safe operation of the pipeline in extreme environments.