What are the surface treatments of EN 10294-1 E355+N seamless pipes

 EN 10294-1 Grade E355+N mild steel seamless pipes are available in thicknesses ranging from 3mm to 100mm, outer diameters from 8mm to 250mm and inner diameters from 5mm to 700+mm.

The shape of the pipe can be produced into a round pipe, and it can be produced into a square pipe or other special-shaped pipe by extrusion or welding. The surface finish can also be processed by cold drawing, centerless grinding, hot rolling, smooth turning and peeling.

Chemical Properties

Carbon	Silicon	Manganese	Phosphorous	Sulphur	Molybdenum	Nickel	Chromium	Copper	Others
max 0.22	max 0.50	max 1.50	0.045	0.05	max 0.08	max 0.40	max 0.30	max 0.30	V max 0.10

Mechanical Properties

Yield Strength		Tensile Strength			Elongation A5 min
MPa min	ksi min	MPa min	MPa min	ksi min	Percentage
		490	–	–	20

E355+N pipe material also belongs to a category of CS pipes, and its hardness is not as good as that of high carbon steel, but its surface hardness can be adjusted by carburizing. The E355 grade is equivalent to the German standard ST52, which corresponds to the national standard Q355 steel. E355N seamless pipe is usually delivered in hot rolled or annealed condition.

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