Specializing in angle steel production (specifications: 40×5～90×10), we adopt a semi-continuous rolling process to manufacture high-quality carbon structural steel and low-alloy structural steel products. Leveraging end-to-end automated control, high-performance equipment configuration, and targeted process optimization, we achieve closed-loop management from raw material processing to automatic stacking—balancing production efficiency, dimensional accuracy, and operational stability. Our line delivers premium section steel for diverse sectors including infrastructure, machinery manufacturing, and equipment processing, with differentiated core advantages in equal-angle steel production to meet stringent requirements across various scenarios.
Core Technical Advantages
1. Robust Equipment Configuration: Solid Foundation for Production
- A complete rolling system consisting of 14 high-performance mills: 6×Φ550 roughing mills for initial billet shaping and 8×Φ450 finishing mills for precision sizing. All mills feature Morgan closed stands, offering exceptional rigidity and deformation resistance to address uneven stress on the two right-angle sides during equal-angle steel rolling, ensuring stable and controllable operations.
- Individual DC motor drives (power range: 450KW~1000KW) enable precise micro-tension control, with a maximum finishing exit speed of ~10m/s. The seamless coordination between motors and mills guarantees uniform cross-sectional dimensions of equal-angle steel, eliminating deviations such as uneven thickness on one side.
- Hydraulic roll change system adopting “integral roll system extraction + precise positioning push” design. The roll change process is efficient, with the replacement time for a single roll system shorter than the industry average—significantly reducing non-productive downtime and enhancing continuous production efficiency.
- Comprehensive auxiliary equipment: Crank-type section steel multiple-length flying shears for precise cutting at 8m/s with smooth, burr-free edges; 1800mm fixed-length cold saws paired with hydraulic clamping devices for ±20mm cutting accuracy (6~12m fixed lengths); automatic section steel stackers with electromagnetic adsorption + servo control, achieving a stacking cycle of ≤12S for neat, transport-friendly bundles.
2. End-to-End Intelligent Control: Mastering Precision Details
- Automated closed-loop workflow: 150×150mm continuous casting billets undergo raw material inspection → conveyed to walking beam heating furnaces via feeding roller tables and heated to the optimal rolling temperature (~1250℃) → 6 passes of H-V alternating rolling in the roughing area to form the initial equal-angle steel cross-section → continuous rolling in 8 finishing mills for precise dimension control → uniform cooling on walking rack-type cooling beds to avoid deformation from temperature differences → straightening by 10-roll cantilever straighteners → fixed-length cutting via multiple-length flying shears and cold saws → automatic stacking into bundles (max. weight per bundle: 6t). Minimal manual intervention is required, realizing automated flow from raw material to finished product.
- Advanced PLC control system integration: Features closed-loop temperature control, real-time workpiece tracking, and dimensional accuracy feedback. During heating, thermocouples monitor billet temperature in real time, automatically adjusting burner intensity to ensure uniform billet temperature (cross-sectional temperature difference ≤30℃). In the rolling phase, encoders and displacement sensors collect roll gap and workpiece dimension data dynamically, optimizing rolling parameters. The side length deviation, perpendicularity, and angle tolerance of equal-angle steel fully comply with GB/T11263－2005, GB/T706－2008, and JIS standards. During cooling, the cooling bed speed is automatically adjusted based on workpiece specifications for uniform cooling.
- Targeted process optimization: A dedicated pass system in the finishing mill group addresses the high demand for consistent forming of the two right-angle sides of equal-angle steel, ensuring uniform side lengths and regular internal angles through multi-pass progressive forming. The 10-roll cantilever straightener adopts “staggered upper/lower rolls + graded pressure adjustment” to correct lateral bending and torsion issues post-rolling, significantly improving product straightness (straightness error ≤2mm/m) and shape regularity.
3. Exclusive Advantages of Equal-Angle Steel: Adapting to Diverse Needs
- Ultra-precise cross-sections: Through a three-stage process (“roughing for contour + finishing for dimension + straightening for shape”), the side length deviation of equal-angle steel is controlled within ±0.5mm, thickness uniformity error ≤0.3mm, and internal angle perpendicularity error ≤0.2°. High fit during assembly enables direct splicing without additional grinding, reducing downstream production costs.
- Stable and reliable mechanical properties: Repeated shaping and uniform cooling refine the metal structure, resulting in tensile strength ≥355MPa, yield strength ≥235MPa, and elongation ≥21% with minimal dispersion. Exceptional load-bearing capacity and deformation resistance make it suitable for heavy-duty structural scenarios such as building frames, bridge supports, and equipment bases.
- Superior surface quality: High-quality continuous casting billets are used with strict control over surface defects (no cracks, folds, or scars). Optimized roll lubrication during rolling reduces scale adhesion, and combined forced ventilation + water mist spraying during cooling prevents surface oxidation discoloration. The final product features a smooth, uniform surface free of obvious scale, scratches, or pits—combining aesthetic and intrinsic quality.
- Flexible specifications and wide adaptability: Customizable production of equal-angle steel in multiple specifications (40×5, 50×5, 63×6, 70×7, 90×10) and fixed lengths (6m, 9m, 12m). The line can also switch to producing channel steel, I-beams, and H-beams with low adjustment costs, enabling rapid response to market order changes and meeting diverse industry needs.
- Significant environmental and energy-saving benefits: Natural gas-fired heating furnaces with air regenerative chambers recover waste heat, achieving thermal efficiency above 75% and lower natural gas consumption per ton of steel than the industry average. Centralized oil supply and circulating filtration for hydraulic and lubrication systems ensure ≥95% hydraulic oil recovery and 30% reduced lubricant consumption. The turbid circulating water purification system achieves 97% water reuse, minimizing pollutant emissions and resource waste.
4. Efficient and Flexible Production: Reducing Comprehensive Costs
- Outstanding large-scale production capacity: The line is tailored for high-volume orders with a continuous operation rate above 85%, stably producing over 300 tons of equal-angle steel per shift. It meets the concentrated supply requirements of large infrastructure projects, effectively shortening construction cycles.
- Humanized fixed-length and packaging options: Supports custom fixed lengths (6~12m) and high-strength steel strip bundling with uniform spacing (max. 6t per bundle), ensuring stability during transportation and ease of on-site hoisting and handling.
- Industry-leading switchover efficiency: Preconfigured rolling parameters and pass data for different section steels in the intelligent control system enable equipment adjustment and parameter configuration in just 30 minutes when switching between equal-angle steel and other section steels. This significantly reduces order switching costs, adapting to small-batch, multi-variety market demands.
- Precise energy consumption control: In addition to eco-friendly designs, the line is equipped with an energy monitoring system that tracks real-time consumption of electricity, gas, water, and oil. Big data analysis optimizes production processes, reducing comprehensive energy consumption per ton of steel by 15%~20% compared to traditional lines—enhancing customer cost competitiveness.
5. Full-Chain Quality Assurance: Eliminating Quality Risks
- Strict raw material inspection: A raw material qualification system conducts comprehensive inspections of 150×150mm continuous casting billets, including dimensional tolerance (length tolerance +80mm, straightness ≤20mm/m), surface quality (no obvious defects), and mechanical properties (compliant with YB/T2011-2004). Unqualified raw materials are rejected.
- Real-time process monitoring: Over 20 detection points are installed at key stages (heating, rolling, cooling, straightening, cutting) to collect real-time data on temperature, dimensions, and speed, forming traceable production records. If parameters deviate from set ranges, the system automatically alarms and triggers adjustment mechanisms to address issues promptly.
- Multi-layered finished product testing: Finished equal-angle steel undergoes appearance inspection (surface, shape, dimensions), mechanical property testing (tensile and bending tests), and non-destructive testing (ultrasonic flaw detection to identify internal defects). Only qualified products receive certification and are warehoused; unqualified products are classified and disposed of to prevent market entry.
- Closed-loop quality traceability: A unique traceability code is assigned to each batch, covering raw material batch, heating parameters, rolling data, test results, and delivery date. Customers can query the full product lifecycle data via the code, ensuring accountable quality responsibility.
One-Stop Service Support
- Customized solutions: Based on customer needs (capacity, product specifications, site conditions), we provide end-to-end customized services including production line planning, process design, equipment selection, and workshop layout—ensuring optimal alignment with actual requirements.
- Full-lifecycle technical support: Professional technical teams oversee equipment installation and commissioning with on-site guidance. Theoretical and hands-on training is provided for operators and maintenance personnel, covering process principles, equipment operation, troubleshooting, and daily maintenance—enabling independent and efficient production.
- Rapid-response after-sales service: A multi-channel response mechanism (hotline, email, online communication platform) ensures initial response and preliminary solutions after receiving customer feedback. For cross-border clients, a dedicated international service team is established, combining regional service outlets and remote technical support to reach key markets (response time can be negotiated for special regions). Detailed equipment wear parts lists and global spare parts supply services are provided, with spare parts warehouses in major regions for fast replenishment—minimizing production downtime.
- Long-term process upgrades: We continuously track industry technological advancements and customer needs, offering value-added services such as production line process upgrades and equipment modifications to help customers improve product quality, expand capacity, reduce costs, and maintain market competitiveness.
Whether for building frames, bridge supports, curtain wall keels in infrastructure, or equipment brackets, base frames, transmission components in machinery manufacturing, or structural connectors and custom non-standard parts in equipment processing, our angle steel production line delivers high-cost-performance solutions leveraging the superior cross-sectional accuracy, mechanical properties, and surface quality of equal-angle steel. We look forward to collaborating with partners worldwide to explore new opportunities in the industry!
