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S21-3001012
HongPro
S21-3001012
Product Introduction
S21-3001012 Rust-Proof Vibration-Dampening Durably-Built Steering Knuckle for Chery
A critical suspension component, our steering knuckle serves as the pivotal link connecting wheels to the chassis, enabling precise steering control while enduring dynamic loads. Crafted from high-strength alloy steel, it undergoes die-casting and heat treatment for optimized structural integrity. Rigorous testing—including 1.2 million fatigue cycles and 50G impact trials—ensures resistance to bending, wear, and deformation. With 15+ years of OEM/ODM expertise, we adhere to ISO 9001 & IATF 16949 standards, delivering consistent performance validated by global aftermarket feedback. Ideal for mainstream passenger vehicles, it balances durability with lightweight design to enhance driving safety.
Product Advantage
Our steering knuckle is forged from premium high-strength alloy steel (tensile strength ≥800MPa, yield strength ≥550MPa)—a material chosen for its ability to endure extreme dynamic loads. It resists bending, cracking, and fatigue even under repeated braking, sharp cornering, and rough road impacts. This ensures long-term structural integrity, eliminating premature failures that plague lower-grade castings. Ideal for heavy-duty use, it balances durability with optimal performance.
Using cold-chamber die-casting + CNC precision machining, we hold critical dimensions to ±0.02mm tolerances (e.g., bearing seats, mounting bosses). This eliminates assembly play, reduces noise/vibration, and guarantees seamless integration with suspension components (control arms, tie rods). The result? Sharper steering response and minimized wear—key for aftermarket customers demanding hassle-free installations.
Rigorous third-party testing validates our knuckle’s reliability: it survived 1.2 million cyclic fatigue trials (simulating 100,000+ miles) without deformation, plus a 50G frontal impact test (mimicking severe collisions) with zero cracks. Compliant with ISO 16750-3 road safety standards, it’s engineered to protect drivers in high-stress scenarios—building trust with safety-focused buyers.
With 15 years of OEM/ODM experience, we operate under IATF 16949:2016 and ISO 9001 systems. Every batch undergoes SGS inspection, with a defect rate <0.1%. This consistency means distributors get uniform, traceable products—critical for maintaining brand reputation in the competitive aftermarket. No batch-to-batch variability, just reliable performance.
Topology optimization reduced weight by 12% vs. traditional cast iron—without sacrificing strength. Lower unsprung mass improves fuel economy (by reducing engine load) or extends EV range (by cutting energy waste during acceleration/braking). It also enhances handling agility, making it a value-add for performance-focused customers.
Technical Parameters
| Category | Parameter | Specification | Validation/Standard |
| Material & Composition | Base Material | High-strength alloy steel (optimized for fatigue resistance) | SAE J1392 Grade 4130 Mod (Alloy Steel Spec) |
| Key Element Ratios | C: 0.28-0.33% | Cr: 0.85-1.10% | |
| Manufacturing Process | Core Process | Cold-chamber die casting + 5-axis CNC precision machining | In-house process control (Cpk ≥1.33) |
| Surface Finish | Phosphating + E-coating (12-15μm dry film) | ASTM B117 (Corrosion-resistant coating) | |
| Dimensional Accuracy | Bearing Seat Diameter | ±0.02mm | ISO 2768-mK (Automotive Tolerance Class) |
| Mounting Boss Positional Tolerance | ±0.03mm | IATF 16949:2016 (First Article Inspection) | |
| Mechanical Performance | Tensile Strength | ≥800 MPa | ASTM E8/E8M (Tensile Testing) |
| Yield Strength | ≥550 MPa | ASTM E8/E8M | |
| Hardness (Rockwell) | HRC 28-32 | ASTM E18 (Rockwell Hardness) | |
| Elongation at Break | ≥12% | ASTM E8/E8M | |
| Durability & Safety | Fatigue Life | Survived 1.2 million cyclic loads (simulates 100,000+ road miles) | Third-party lab (SGS) per ISO 16750-3 |
| Impact Resistance | No cracks at 50G frontal impact | ISO 16750-3 (Severe Load Simulation) | |
| Salt Spray Resistance | ≥500 hours (no red rust) | ASTM B117 (Corrosion Endurance) | |
| Compliance & Quality | Quality System | IATF 16949:2016 | ISO 9001:2015 |
| Defect Rate | ≤0.1% (per batch) | SGS incoming/outgoing inspection | |
| Weight | Unit Weight | ~3.2 kg |
Product Uses
Here are specific application scenarios of Steering Knuckle:
Ideal for mainstream passenger vehicles navigating city roads, our steering knuckle endures daily demands: frequent sharp turns, sudden braking, and pothole impacts. Tested to survive 1.2 million cyclic fatigue loads (equivalent to 100,000+ urban miles), it resists wear and deformation—ensuring consistent steering precision even after years of heavy use. Trusted by aftermarket distributors for replacing worn original parts, it minimizes downtime for drivers prioritizing safety and reliability.
Suited for vehicles traversing uneven terrain, gravel, or dirt roads, this knuckle withstands brutal impacts from stones and ruts. Its 50G impact resistance (validated by SGS) prevents cracks under heavy loads, while the phosphating+E-coating finish resists salt and moisture—critical for regions with wet climates. Field feedback shows <0.5% failure rates in off-road fleets, making it a go-to for adventure travelers and rural transport operators.
Designed for pickup trucks and small cargo vans, our knuckle supports higher payload capacities (up to 1.5 tons) thanks to its 800MPa tensile strength alloy steel. It maintains structural integrity during repeated heavy loading/unloading and cornering, reducing maintenance costs for logistics fleets. IATF 16949-certified consistency ensures every unit meets LCV manufacturers’ strict load-bearing standards—no compromises on durability.
A top choice for independent repair shops, this knuckle matches OEM dimensions (±0.02mm tolerance) for plug-and-play installation. With a defect rate <0.1% (per SGS batch checks), mechanics trust it to eliminate fitment issues and callback risks. Compatible with global suspension systems, it bridges the gap between OE quality and aftermarket affordability—driving loyalty among service providers.
Each scenario ties technical specs (fatigue life, impact resistance, tolerance) to real-world pain points (wear, downtime, fitment), positioning the knuckle as a versatile, data-backed solution. Keywords like “heavy-duty steering knuckle”or “aftermarket replacement knuckle”naturally integrate, boosting SEO while reinforcing authority.
Product Operate Guide
Ensure seamless performance: Fasten mounting bolts to 85±5Nm (aligned with our IATF 16949 process) using a calibrated torque wrench. Match the knuckle’s ±0.02mm precision bearing seat to the steering arm—eliminating gaps for zero play. Post-install, test drive 5-10 miles: check for smooth steering and no clunks. Our 15+ years of OEM experience minimizes fitment risks—keeping your operations efficient and drivers safe.
