Od20mm 28mm 30mm SAE Stkm Steel Tubes Cold Drawn Mechanical Tube

Customization:	Available
Type:	Seamless
Technique:	Cold Drawn

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Basic Information

Material:Carbon and Alloy

Surface Treatment:Bright Annealing, Black Phosphating, Galvanizing

Section Shape:Round

Standard:DIN2391, En 10305-1, JIS G3445, ASTM A519

Steel Grade:St35, St45, St52, E235, E355, 1010, Stkm 11A

Specification:OD2-60mm

Delivery Condition:BK, GBK, BKW, BKS or NBK

Certificate:ISO 9001, TS16949

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Detailed Photos

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Technical Specifications

Standards	Steel Grades	Size Range
DIN 2391 / 1629 / 1630	ST35/45/52, ST37/44/52	OD2 - 60mm × WT0.3 - 10mm
GB/T 8162 / 8163 / 3639	10/20/16Mn/35/45/30CrMo/etc	OD2 - 60mm × WT0.3 - 10mm
EN 10305-1 / 10305-4	E215/235/255/355	OD2 - 60mm × WT0.3 - 10mm
ASTM A519 / A179 / A822	1010/1015/1025/1045/4130/etc	OD2 - 60mm × WT0.3 - 10mm
JIS G3445 / G3455	STKM11A/12A/13A/S45C/STS35/etc	OD2 - 60mm × WT0.3 - 10mm
ISO 8535	ST 35 / 45 / 52 / 37.4 / 44.4	OD3 - 30mm × ID 1 - 12.5 mm

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Delivery & Quality Control

Delivery Conditions: BK (+C), BKW (+LC), BKS (+SR), GBK (+A), NBK (+N)
Inspection Items: Tensile strength, Yield strength, Elongation, Flattening, Flaring, Chemical analysis, 100% Eddy Current Test, 100% Size & Surface checking.

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Product Applications

✔Vehicle Powertrain (Fuel lines, Diesel lines, SCR & EGR)

✔Fluid Handling Systems (Air-conditioning, Clutch actuator)

✔Drive & Steering Systems (Power-steering pipes)

✔Hydraulic & Pneumatic Pressure Lines

✔Mechanical Engineering (Heat Exchange, Gas Cylinders)

✔Energy Generation (Aerospace, Wind Power Equipment)

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Manufacture Process

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Manufacturing Capabilities

Our facilities specialize in producing precision steel tubes for the automotive industry and hydraulic systems, as well as steel forgings for marine, power, boiler, and petrochemical fields. With a total area of 150,000 square meters and over 200 employees, all products undergo double inspection by professional quality controllers to ensure rigorous testing standards are met before delivery.

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Packaging & Shipping

Standard transport package includes plywood boxes or bundles for secure transit.

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Frequently Asked Questions

What materials are used for these precision tubes?

The tubes are manufactured from high-quality Carbon and Alloy steel, available in various grades such as St35, St45, St52, E235, and E355.

What surface treatments are available?

We offer Bright Annealing, Black Phosphating, and Galvanizing to meet different environmental and application requirements.

Which international standards do your products follow?

Our production complies with major global standards including DIN 2391, EN 10305-1, JIS G3445, and ASTM A519.

What is the typical size range for your cold-drawn tubes?

We provide tubes with an Outer Diameter (OD) ranging from 2mm to 60mm, with various wall thicknesses to suit precision applications.

How do you ensure the quality of the tubes?

We perform 100% size and surface checks, along with 100% Eddy Current Tests. Major mechanical tests include Tensile strength, Yield strength, and Flaring analysis.

What are the primary applications for these steel tubes?

They are widely used in automotive powertrain systems, fuel lines, hydraulic systems, construction machinery, and heat exchangers.