AG400CL Hot Rolled Steel Coil
AG400CL High-Yield Hot Rolled Steel for Automotive Wheels and Structural Parts
Comprehensive data sheet of AG400CL hot rolled steel according to Baosteel standard Q/BQB 310-2009, including chemical composition, mechanical and physical properties, international equivalents and application guidance.
Cutting, bending, stamping, welding, punching, roll forming
- Phone : +8618037372205
- Email : [email protected]
- WhatsApp: Contact via Whtsapp
- WeChat: +8618037372205
AG400CL Hot Rolled Steel Coil Introduction
AG400CL is a hot-rolled high-yield-strength steel grade designed for automotive structural and wheel applications, specified in Baosteel enterprise standard Q/BQB 310-2009. It offers a minimum yield strength of 400 MPa, good formability and excellent weldability. The steel is typically supplied in the hot-rolled condition and is suitable for parts requiring strength and durability, such as wheel rims, discs and chassis components. Its controlled chemical composition ensures consistent mechanical properties and reliable performance in forming and welding processes.
AG400CL Hot Rolled Steel Coil Chemical Composition
Ladle analysis according to Q/BQB 310-2009. All values are maximum unless a range or minimum is indicated. The aluminium content is specified to ensure fine grain and deoxidation.
| Element | Standard Value (%) | Remarks |
|---|---|---|
| C | ≤0.12 | |
| Si | ≤0.50 | |
| Mn | ≤1.20 | |
| P | ≤0.030 | |
| S | ≤0.025 | |
| Alt (total aluminium) | ≥0.015 | Minimum value for fine grain practice |
AG400CL Hot Rolled Steel Coil Thermal and Electrical Physical Properties
Typical values for carbon and low-alloy steels at room temperature, unless otherwise specified. These are not specified in the standard but serve as engineering reference.
| Property | Typical Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | 20 °C |
| Elastic Modulus (E) | 210 | GPa | 20 °C, static |
| Shear Modulus (G) | 80 | GPa | 20 °C, static |
| Poisson's Ratio (ν) | 0.30 | – | 20 °C, elastic range |
| Thermal Expansion Coefficient (α) | 12.0 × 10⁻⁶ | K⁻¹ | 20–100 °C |
| Thermal Conductivity (λ) | 50 | W/(m·K) | 20 °C |
| Specific Heat Capacity (cp) | 460 | J/(kg·K) | 20 °C |
| Electrical Resistivity (ρe) | 0.16 | μΩ·m | 20 °C |
AG400CL Hot Rolled Steel Coil Mechanical Properties
Transverse test specimens. Tensile properties and bend test according to Q/BQB 310-2009. Elongation measured on proportional gauge length L0=50 mm for thickness <3 mm; for thickness ≥3 mm, L0=5.65√S0.
| Property | Specified Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | 400 – 520 | MPa | Transverse, all thicknesses |
| Tensile Strength (Rm) | ≥490 | MPa | Transverse, all thicknesses |
| Elongation after fracture (A) | ≥18 | % | Thickness <3 mm, L0=50 mm |
| Elongation after fracture (A) | ≥22 | % | Thickness ≥3 to <6 mm, L0=5.65√S0 |
| Elongation after fracture (A) | ≥24 | % | Thickness ≥6 mm, L0=5.65√S0 |
| Bend Test (Bend Diameter) | 2.0a (bend diameter = 2 × thickness a) | – | 180° bend, no cracks |
AG400CL Hot Rolled Steel Coil Fully Equivalent Material Standards & Substitute Grades Recommendation
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JFS A 3001 | JSH590R | Comparable yield and tensile requirements for automotive high-strength hot-rolled steel |
| Europe | EN 10149-2 | S420MC | Yield strength min. 420 MPa, comparable formability |
| China | Q/BQB 310-2009 | AG400CL | Original standard and grade |
AG400CL Hot Rolled Steel Coil Application Introduction
AG400CL is specifically designed for lightweight automotive parts where high yield strength and good fatigue resistance are essential. It can be processed by cold forming, welding and bending.
Product Applications: Steel wheels for passenger cars, trucks and agricultural vehicles, Wheel rims and wheel discs, Chassis frames and subframes, Structural brackets and reinforcements
Processed into products: Wheel rim (outer & inner rim), Wheel disc / spider, Cross member, Longitudinal beam, Suspension arm, Engine cradle, Reinforcement panel
Application industries: Automotive manufacturing, Commercial vehicle production, Agricultural machinery, Construction machinery
AG400CL Hot Rolled Steel Coil Similar / Alternative Material Recommendations
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G 3134 | SPFH590 | Minimum yield 420 MPa, higher strength class, similar application |
| Japan | JIS G 3134 | SPFH540 | Minimum yield 325 MPa, lower strength |
| Europe | EN 10149-2 | S315MC to S500MC | Series of high-strength low-alloy grades with comparable formability |
| Germany | DIN EN 10149-2 | QStE420TM | Similar yield strength (≥420 MPa), thermomechanical rolled |
| China | GB/T 20887.1 | HR420 | Domestic equivalent with min. yield 420 MPa |
Notes:
For thicknesses outside the range specified in Q/BQB 310-2009, mechanical properties shall be agreed upon. The steel is not intended for heat treatment; typical delivery condition is as-rolled. Surface quality is intended for parts where normal surface imperfections are acceptable, unless improved quality is specified. Welding suitability is ensured by controlled carbon equivalent (CEV typically ≤0.35%).
- Share
