What are the standards for St52.4 cold-drawn precision seamless steel pipes

The main standards for St52.4 cold-drawn precision seamless steel pipes include the following:

First, what are the main standards for St52.4 cold-drawn precision seamless steel pipes?

St52.4 cold-drawn precision seamless steel pipes typically follow the following main standards:

1) DIN 2391: This is a German industrial standard specifically designed to specify the technical requirements for cold-drawn or cold-rolled precision seamless steel pipes. This standard covers requirements for the dimensions, tolerances, surface quality, chemical composition, and mechanical properties of the steel pipes.

2) EN 10305: This is a European standard used to specify the delivery technical conditions for cold-drawn seamless steel pipes used in hydraulic and pneumatic systems. Although the EN 10305 series of standards may contain multiple parts, St52.4 cold-drawn precision seamless steel pipes, while complying with DIN 2391, may also need to meet certain specific requirements for steel pipes in EN 10305.

Second, what is the chemical composition of St52.4 cold-drawn precision seamless steel pipe?

The chemical composition of St52.4 cold-drawn precision seamless steel pipe typically falls within the following ranges: Carbon: 0.17~0.22%; Silicon: 0.20~0.60%; Manganese: 1.20~1.60%; Phosphorus: ≤0.030%; Sulfur: ≤0.030%; Chromium: ≤0.30%; Nickel: ≤0.30%; Copper: ≤0.25%. These chemical composition ranges ensure that the steel pipe possesses excellent mechanical properties and corrosion resistance.

Third, what are the mechanical properties of St52.4 cold-drawn precision seamless steel pipe?

The mechanical properties of St52.4 cold-drawn precision seamless steel pipe typically include tensile strength, yield strength, elongation, and impact toughness. The specific values of these performance parameters depend on factors such as the wall thickness, outer diameter, and heat treatment state of the steel pipe.

Fourth, what are the dimensions and tolerances of St52.4 cold-drawn precision seamless steel pipes?

Cold-drawn precision seamless steel pipes are renowned for their high precision and high surface finish. The dimensions and tolerances of St52.4 cold-drawn precision seamless steel pipes typically conform to the specifications in DIN 2391, ensuring the accuracy of the steel pipe in terms of inner and outer diameters, wall thickness, and length.

Fifth, what is the surface quality of St52.4 cold-drawn precision seamless steel pipes?

The surface quality of St52.4 cold-drawn precision seamless steel pipes typically requires the absence of oxide layers, cracks, folds, rolling folds, delamination, hairline cracks, and scale defects. These requirements ensure good sealing and durability when the steel pipe is used in hydraulic systems.