Automotive Grade Carbon Steel Round Tube
Precision engineered for demanding vehicle and machinery applications, our Automotive Grade Carbon Steel Round Tube delivers exceptional strength, durability, and reliability. This tubing is the backbone of critical automotive systems, including roll cages, chassis components, suspension parts, and structural reinforcements. Manufacturers and fabricators choose our high-grade tubing for its superior weldability, formability, and consistent mechanical properties, which are essential for both OEM production and aftermarket high-performance modifications. For applications requiring flawless internal integrity and high-pressure resistance, our Seamless Carbon Steel Round Tube is the premier choice. When cost-effective, high-volume structural components are needed, our ERW Carbon Steel Round Pipe offers excellent dimensional accuracy. Our product line meets rigorous industry standards, including the versatile ASTM A53 Carbon Steel Round Tube for general mechanical and pressure applications, and the high-temperature service ASTM A106 Grade B Round Pipe for exhaust and drivetrain systems.
The manufacturing of Automotive Grade Carbon Steel Round Tube involves a stringent process from billet selection to final inspection. Only controlled chemistries are used to ensure optimal carbon and manganese content, providing the perfect balance between tensile strength and ductility. This precise chemical composition is critical for crashworthiness and fatigue resistance in automotive environments. Each length of tubing undergoes non-destructive testing, such as ultrasonic or eddy current inspection, to guarantee it is free from defects that could compromise performance. The surface finish is carefully controlled, often featuring a smooth, scale-free condition ideal for subsequent painting, powder coating, or plating processes. This rigorous quality control ensures that every Automotive Grade Carbon Steel Round Tube performs reliably under the stress, vibration, and thermal cycles inherent in vehicular operation.
Key Specifications & Mechanical Properties
- Material Grades: SAE/AISI 1020, 1026, 1035, 4130, ASTM A519
- Primary Standards: ASTM A53 (Type F, E, S), ASTM A106, ASTM A519, SAE J524, J525
- Key Process: Cold Drawn Seamless (CDS), Electric Resistance Welded (ERW), Hot Finished Seamless (HFS)
- Typical Yield Strength: 30,000 psi to 70,000 psi (min)
- Typical Tensile Strength: 55,000 psi to 90,000 psi (min)
- Surface Finish: Cold drawn (smooth), hot rolled (with scale), pickled & oiled, bare
- Common End Finish: Plain end, deburred, square cut, beveled for welding
Standard Available Sizes & Tolerances
| Outer Diameter (OD) | Wall Thickness (WT) | Common Lengths | OD Tolerance (CDS) | Wall Tolerance |
|---|---|---|---|---|
| 0.500" to 0.750" | 0.035" to 0.120" | 12' to 24' | ±0.005" | ±10% |
| 0.750" to 2.000" | 0.049" to 0.250" | 12' to 24' | ±0.005" | ±10% |
| 2.000" to 4.000" | 0.083" to 0.375" | 12' to 24' | ±0.007" | ±10% |
| 4.000" to 8.000" | 0.120" to 0.500" | 12' to 24' | ±0.010" | ±10% |
Typical Chemical Composition (%)
| Grade (Example) | Carbon (C) | Manganese (Mn) | Phosphorus (P) max | Sulfur (S) max |
|---|---|---|---|---|
| SAE 1020 | 0.18 - 0.23 | 0.30 - 0.60 | 0.040 | 0.050 |
| SAE 1026 | 0.22 - 0.28 | 0.60 - 0.90 | 0.040 | 0.050 |
| SAE 4130 | 0.28 - 0.33 | 0.40 - 0.60 | 0.035 | 0.040 |
| ASTM A106 Gr. B | 0.30 max | 0.29 - 1.06 | 0.035 | 0.035 |
Related Products
Hot Products
Galvanized Square Hollow Section
Tianjin Shunchen Industrial is a professional China manufacturer and supplier of galvanized square hollow section. Adopting fully automatic hot-dip galvanizing technology with full inner-wall zinc coverage, our products deliver uniform 275-500g/m² zinc coating, solving common pain points like inner corner missing plating, weld seam rusting and short service life in outdoor corrosive environments. It is the ideal material for building curtain walls, photovoltaic supports, municipal guardrails and steel structure projects, welcome to send inquiries for free samples and quotes.
Seamless Round Steel Pipe for Pressure Applications
The Shunchen Seamless Round Steel Pipe For Pressure Applications delivers exceptional strength, uniform wall thickness, and weld-free structural integrity. Made from Q235B, Q345B, Q355B, or stainless steel, it handles high internal pressures, dynamic surge loads, and harsh industrial environments.
Spiral Welded Steel Pipe for Water Transmission
Shunchen specializes in large diameter Spiral Welded Steel Pipe for water transmission. Compliant with AWWA C200 and API 5L, our pipes feature non-toxic internal linings and 3PE anti-corrosion coatings. We offer diameters up to 3620mm for safe, long-distance fluid transport.
PV Carport Mounting System
Shunchen Industrial's High-quality PV Carport Mounting System is an integrated installation support system specifically tailored for solar photovoltaic modules. This system integrates high-quality components such as custom-designed embedded panels, high-strength brackets, threaded steel, and precision connectors, cleverly divided into two main categories based on application scenarios: rooftop and ground-mounted. Through precise design and professional installation, it provides a stable and reliable foundation for photovoltaic modules while flexibly adapting to angle adjustment needs, ensuring that the modules always receive sunlight in the optimal position, achieving efficient power generation and long-term stable operation.
Cold Rolled Steel Strip
Tianjin Shunchun factory's Cold Rolled Steel Strip (in coil form) is made from hot-rolled strip steel through processes such as rolling, annealing, and pickling at room temperature. It is supplied in coils for large-scale processing. Its core advantage stems from the room-temperature processing technology, which avoids the formation of iron oxide scale and uneven temperature drop from the source, providing a high-precision, high-surface-quality base material.
Hot Rolled Steel Hexagon Bar for Machining Parts
Shunchen provides Hot Rolled Steel Hexagon Bar For Machining Parts for wholesale purchase and industrial applications. Manufactured from Q235B and Q355B carbon structural steel, these hexagonal bars feature stable dimensions, machining-friendly surfaces and flexible processing options. Available with cutting, drilling, threading and surface treatments, they comply with GB, ISO, EN, ASTM and DIN standards for mechanical parts, fasteners and equipment manufacturing.
- Related Blog
- Reviews
