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Aluminum alloy cast automotive shock absorber struts, as critical load-bearing and guiding components of the suspension system, utilize precision forming processes such as differential pressure casting and extrusion casting to transform the lightweight and tough properties of aluminum alloy into precise chassis dynamic response. The strut body integrates ball joint mounting holes, bushing press-fit seats, and sensor brackets, significantly reducing unsprung mass while providing the suspension with superior road-feel resolution. With excellent impact toughness and high-cycle fatigue strength, it effortlessly withstands the rigorous challenges of random road disturbances and extreme driving conditions. The surface undergoes multi-layer protective treatment, making it impervious to road salt, mud, and stone impacts. With its lightweight yet robust construction, it delivers a supremely confident and responsive driving experience.
Product Name: Aluminum Alloy Cast Automotive Shock Absorber Mount
Installation Location: Front/Rear Lower Control Arms, Shock Mounts, Longitudinal Thrust Rods
Product usage scenarios
1. Long-Range New Energy Vehicles and Comfort Scenarios
Product Name: Lightweight Integrated Die-Cast Aluminum Alloy Lower Control Arm
Installation Location: Lower control arm of the front suspension on all-electric and hybrid models
To address the dual demands of range and ride comfort in new energy vehicles, the design utilizes a high-elongation aluminum-silicon-magnesium alloy and a hollow, thin-walled cast structure, reducing weight by more than 35% compared to steel components. This significantly lowers unsprung mass, enabling the suspension to respond more quickly and smoothly to road bumps, improving tire-to-road contact. The control arm body integrates mounting points for the shock absorber fork and stabilizer bar linkages, formed in a single process to reduce welding and assembly tolerances. This also provides more space for battery pack layout, offering greater design flexibility for chassis engineering.
2. High-Performance Sports Driving Scenarios
Product Name: High-Rigidity Forged Die-Cast Aluminum Alloy Control Arm
Installation Location: Front double-wishbone or multi-link suspension on sports/high-performance models
Designed for precise steering and ultimate handling, it utilizes a near-forged die-casting process that results in a dense, streamlined internal structure and refined grain size, delivering yield strength and impact toughness far exceeding those of ordinary castings. The control arms feature a thickened design at critical points, effortlessly absorbing the immense longitudinal and lateral forces generated during high-speed cornering and sudden braking. The periphery of the bushing holes has been reinforced through cold extrusion, achieving a fatigue life exceeding 2 million cycles. By precisely controlling the movement of the suspension components, it delivers scalpel-sharp steering response to the driver, embodying the ultimate in man-machine harmony.
3. High-durability load-bearing scenarios for commercial vehicles
Product Name: High-Load Differential Pressure Die-Cast Aluminum Alloy Thrust Rods and Shock Absorber Mounts
Installation Location: Rear Suspension Tie Rods and Shock Absorber Mounts for Light Commercial Vehicles/Pickup Trucks
Designed specifically for heavy loads and varied road conditions, this component utilizes differential pressure casting combined with localized reinforcing ribs. It offers load-bearing capacity comparable to steel parts while eliminating the burden of heavy inertia. The thick-walled bushing housing is precision-bored and milled to ensure long-term alignment of the rubber bushing after press-fitting, thereby eliminating uneven wear and abnormal noises. The surface is treated with a thick, corrosion-resistant coating that withstands continuous exposure to mud, gravel, and mildly acidic or alkaline environments. The structure remains secure and rust-free throughout its entire service life, ensuring high commercial vehicle uptime and reducing fleet maintenance costs.
Product Specifications
| Parameter Categories | Key Indicators |
|---|---|
| material (that sth is made of) | A356.2 / AlSi7Mg0.3 / AlSi10MnMg / 6082 series wrought alloys (extrusion casting) |
| Molding process | Differential pressure casting, die casting (liquid die forging), low-pressure casting + heat treatment |
| tensile strength | ≥300 MPa (samples taken from the T6-conditioned matrix) |
| yield strength | ≥230 MPa |
| elongation | ≥8% (A356 grade), some die-cast parts ≥12% |
| Fatigue Limit | Tensile-compressive symmetric cyclic fatigue strength ≥120 MPa (1×10? cycles) |
| Tolerances for Ball Pin Socket Bore Diameter | IT6 grade, cylindricity ≤ 0.008 mm |
| Press-fit force for bushing holes | Meets 3–8 kN press-in/pull-out force requirements, with interference fit in accordance with OEM standards |
| intensity | Approximately 2.68 g/cm3 |
| surface treatment | Chromium-free passivation + epoxy-polyester powder coating (or electrophoretic coating), film thickness 60–100 μm |
| Salt Spray Resistance | Neutral salt spray ≥720 hours (no red rust or blistering) |
| Resistant to stone impacts | Complies with the SAE J400 standard; coating adhesion ≤ Grade 1 |
| weights | Typical weight per piece: 1.2 kg–4.5 kg (35%–50% lighter than steel) |
| Compatible Vehicle Models | Passenger cars, SUVs, MPVs, and light commercial vehicles in classes A0 through C |
Product Advantages
- Extreme Weight Reduction Under the Suspension: A Win-Win for Handling and Comfort
Each control arm weighs over 35% less than its steel counterpart, significantly reducing unsprung mass. This results in agile suspension response and smooth shock absorption, while also enhancing steering feedback and tire grip, striking a balance between comfort and handling. - Integrated Molding: A Leap Forward in Precision and Integration
The control arm body integrates multiple functional components—including shock absorber mounting brackets, sensor mounts, and brake line clips—thereby reducing the number of welded assemblies, eliminating the risk of weld toe cracking, and ensuring excellent dimensional consistency and interchangeability. - Outstanding fatigue resistance; safe and reliable throughout its entire service life
The microstructure is dense, with no shrinkage or porosity defects. Based on results from multi-axis test bench simulations and road spectrum tests, its fatigue life far exceeds the design benchmark, eliminating the risk of fracture caused by material fatigue. - High environmental resilience, low maintenance costs
The aluminum substrate is naturally corrosion-resistant and, combined with multiple layers of protection, can withstand de-icing salt, coastal salt fog, and exposure to muddy water. The coating offers excellent resistance to stone impact, eliminating the need for users to spend money on rust prevention and maintenance. - Wide design flexibility, driving chassis innovation
The casting process can produce complex hollow cross-sections and topologically optimized ribs, enabling lightweight designs with equivalent strength and providing greater engineering flexibility for chassis tuning and layout.
Manufacturing & Services
Ningbo Hexin Molding Co., Ltd. has over 20 years of experience in precision aluminum alloy casting and has established a fully integrated, closed-loop production process—from material development, casting process simulation, and mold design and manufacturing to differential pressure/extrusion casting, heat treatment, precision machining, and surface treatment. The factory is IATF 16949 certified and equipped with a full suite of validation facilities, including industrial CT scanners, coordinate measuring machines, and fatigue testing machines, ensuring that our suspension arm products fully comply with OEMs’ stringent standards in terms of strength, fatigue resistance, sealing, and cleanliness. We offer multi-tiered, flexible delivery options ranging from raw castings to finished assemblies and support VMI/JIT models. Through the depth of our joint R&D capabilities and an agile supply chain system, we provide global customers with reliable, cost-effective, and lightweight suspension component solutions.
