ASTM A513 Tubing
ASTM A513 Tubing - industrial steel product
Automotive engineering demands materials with superior strength, stability, and durability.
Factory supply high-precision cold drawn automotive tubing, custom bending, honing, threading and surface treatment. Stable tight tolerances, excellent weldability and bending performance for all vehicle structural and hydraulic parts.
The automotive industry sets strict standards for precision, fatigue strength and formability across all vehicle tubular parts. Our full portfolio of cold drawn seamless tubes is widely applied in passenger cars, commercial trucks, buses and agricultural machinery for chassis beams, suspension arms, steering sleeves and hydraulic cylinder barrels. Our extensive lineup of premium automotive tubing covers every vehicle manufacturing application. Locate the matching steel grade and dimension to fit your production requirements from our complete product groups.
Automotive tubes endure constant vibration, alternating loads and temperature changes during driving. Therefore consistent dimensional tolerances, uniform wall thickness, smooth inner and outer surfaces and stable fatigue performance are non-negotiable. We supply two core automotive tube categories: precision structural tubes for frame & suspension assemblies, and mirror honed tubes for vehicle hydraulic systems, fully compliant with European EN, German DIN, US ASTM and Chinese GB industry standards.
| Standard System | Standard Code | Application Scope |
|---|---|---|
| European EN Standard | EN 10305, EN 10268 | EU passenger car & light commercial vehicle precision tubing |
| German DIN Standard | DIN 2391, DIN 2448 | Vehicle hydraulic cylinder blanks, bent suspension tubes |
| US ASTM Standard | ASTM A519 | North American heavy-duty truck alloy structural tubing |
| Chinese GB Standard | GB/T 3639, GB/T 8162 | Domestic auto chassis and vehicle hydraulic parts |
| Steel Grade | Material Feature | Typical Automotive Usage |
|---|---|---|
| E355 / ST52 | High strength low alloy, superior bend & weld ability | Chassis beam, suspension control arm, truck frame tube |
| ST45 / 45# | Medium carbon steel, suitable for hardening treatment | Steering column sleeve, small transmission shaft blank |
| 20# / 1026 | Mild carbon steel, excellent weldability | Exhaust pipe blank, auxiliary support frame |
| 4130 Cr-Mo Alloy | Medium high strength, good fatigue resistance | Light commercial vehicle high-pressure hydraulic cylinder |
| 4140 Cr-Mo Alloy | Ultra high strength, heavy load fatigue resistance | Off-road vehicle, mining truck suspension & hydraulic parts |
E355 / ST52 is the most widely used grade for passenger car and light commercial vehicle structural tubes due to balanced mechanical performance and cold forming capacity.
| Mark | Treatment State | Automotive Processing Suitability |
|---|---|---|
| BK | Cold Hard, No Annealing | Rigid straight sleeves without bending processing |
| BKW | Stress Relieved | Slightly bent chassis auxiliary support tubes |
| GBK | Fully Annealed | Complex bent suspension arms, U-shaped hydraulic pipelines |
| NBK | Normalized | High-fatigue heavy truck frames and alloy hydraulic cylinders |
EN 10204 3.1 / 3.2 official MTC material test certificates are issued for each batch, fully meeting strict incoming QC standards of global auto OEM and Tier 1 component suppliers.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
