DIN EN1305 Precision Seamless Carbon Steel Pipes Supplier

Production Introduction:

Shape: Round

Standard: EN10305-4 (DIN2445/2), EN10305-1 (DIN2391/C), GB/T3639, ASTM A179

Material: ST37.4, ST35, ST45, ST52, E235, E355

Salty spray test: ≥ 120hours

Size: Outside Diameter (OD): 4.0mm~80.0mm, Wall Thickness (WT): 0.5mm~8.0mm

Outside Diameter (OD) Standard Size: 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 15mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, 42mm,45mm, 50mm, 55mm, 60mm, 70mm, 80mm, 100mm

Length: Standard DIN EN1305 seamless steel pipe length is 6 meters or 5.8 meters. Other hydraulic tubes length dimensions also range from 2 to 12 meters. Also can Customizable length according to customer requirements.

Surface Treatment: Galvanized, phosphated, pickling or other processes.

Seamless Galvanized Steel Tubes: Standard zinc coating thickness is 8 to 12μm

Phosphating steel tubes: External Phosphating Coating

Sample: We can provide carbon seamless steel tubes samples for trial.

Chemical Composition of Cold Drawn Seamless Precision Steel Tubes:

Steel Grade	Chemical Composition%
Steel Grade	C	Si	Mn	P	S
ST37.4/E235	0.07~0.13	0.17~0.37	0.35~0.65	≤0.035	≤0.035
ST35	0.07~0.13	0.17~0.37	0.35~0.65	≤0.035	≤0.035
ST45	0.17~0.23	0.17~0.37	0.35~0.65	≤0.035	≤0.035
ST52/E355	0.13~0.19	0.20~0.60	1.20~1.60	≤0.030	≤0.030

Tolerance of Bright Seamless Steel Tubes:

OD/mm	Tolerance/mm	ID/mm Tolerance/mm	Straightness/mm
4~30	±0.08	±0.08~±0.15	0.1/1000
30~38	±0.15	±0.15~±0.20
38~50	±0.20	±0.20~±0.25
50~80	±0.25~±0.35	±0.25~±0.35

Mechanical Property of Carbon Seamless Steel Pipes:

Steel Grade	Yield strength	Tensile Strength	Elongation
	ReH	Rm	A
	min.	min.	min.
	MPa	MPa	%
ST37.4/E235	≥235	340 to 480	≥25
ST35	≥235	340 to 480	≥25
ST45	≥255	410 to 520	≥25
ST52/E355	≥355	490 to 630	≥22

Advantages of Precision Hydraulic Steel Pipes:

Excellent mechanical properties: Because seamless hydraulic steel tube have no welds, they have higher tensile strength and compressive resistance.
Able to withstand high pressure and high load, they are ideal for hydraulic and pneumatic system pipelines.
Cold drawing or cold rolling process, with high-precision dimensions. Especially suitable for hydraulic systems, precision equipment and the automotive industry.

Why Seamless Steel Pipes is Cold Drawn or Cold Rolled?

The main purpose of cold drawing or cold rolling is to further improve the precision, strength and surface quality of seamless precision carbon steel hydraulic tubes through plastic deformation process.

Therefore, seamless precision steel tubes have higher dimensional accuracy, surface quality and mechanical properties.

cold drawn seamless precision steel tubes can be better used in hydraulic and pneumatic systems. As well as precision machinery and engineering machinery and other fields.

Application of Precision Seamless Steel Pipes

With advanced technology, seamless precision carbon steel tubes are designed to meet the stringent requirements of a wide range of industries. Superior strength, precision and durability make them a choice you can trust:

Hydraulic or pneumatic systems: Mainly used in pipelines and booms of construction machinery, agricultural machinery, and industrial equipment.
Automotive industry: As a key component in suspension systems, fuel lines and other precision engineering parts.
Industrial machinery: Provide powerful and precise solutions for fluid delivery and structural support.
Aerospace and defense: Meet stringent performance and safety standards in high-risk environments.

Machinery Boom

Diesel Engine

Hydraulic or Pneumatic System

Package & Shipping

All EN1305-1, EN1305-4, DIN2391 cold drawn seamless precision steel pipes are carefully packed to provide maximum anti-collision protection to ensure their intact transportation.

The packaged seamless carbon steel precision hydraulic tubes are packed in wooden boxes or containers. It depends on the quantity of goods.

Packaging for Seamless Hydraulic Tubes

Wooden Box Package

Container Shipping

Factory of Carbon Seamless Steel Pipe

Our factory has more than fifteen years of export experience, has advanced production equipment, and has cooperated with customers in more than forty countries.