Dongfeng DFAC CAPTAIN truck parts Bumper bracket 8406020-T1500 in stocked

Built to support the DFAC CAPTAIN’s heavy-duty front bumper (up to 80kg) and absorb minor collision impacts, the bracket is crafted from Q355ND low-alloy high-strength steel—specifically designed for low-temperature and heavy-load commercial vehicle applications. This material delivers a minimum yield strength of 355 MPa, tensile strength of 470–630 MPa, and impact toughness of ≥34 J at -40°C, enabling the bracket to bear a maximum static load of 5kN without deformation. The steel undergoes a quenching and tempering process (880°C quenching, 550°C tempering) to enhance hardness (HB 180–220) and fatigue resistance, passing 3 million load cycles (equivalent to 200,000 km of road use) without crack formation. Compared to ordinary Q235 steel brackets, this Q355ND design extends service life by 70% under frequent heavy-duty use (e.g., construction site hauling)

Engineered to dissipate impact energy and protect the DFAC CAPTAIN’s front chassis, the bracket features a “V-shaped” reinforcing rib structure (5mm thick) along its vertical axis—increasing impact resistance by 45% compared to flat-plate designs. The bracket’s top and bottom edges are folded (15mm flange) to form a closed cross-section, enhancing torsional stiffness by 38% and preventing bending during minor front-end collisions (e.g., hitting curbs or small obstacles at ≤10km/h). A 10mm-thick buffer plate is welded to the bracket’s bumper contact surface, absorbing 30% of impact force before it transfers to the chassis frame. Unlike rigid brackets that crack under impact, this optimized design balances strength and flexibility, reducing bumper and chassis damage in low-speed collisions

Designed to resist corrosion from road salt, mud, and rain (common in commercial vehicle undercarriage environments), the bracket undergoes a five-stage protective process. First, a chemical degreasing and shot blasting treatment removes surface rust and contaminants. Next, a zinc phosphate conversion coating (60μm thickness) creates a porous base for coating adhesion. Then, an electrophoretic primer (80μm) forms a uniform moisture barrier, preventing rust from forming on steel surfaces. A high-build epoxy mid-coat (70μm) fills minor surface defects, followed by a polyurethane topcoat (50μm) that resists chipping, chemical damage (e.g., diesel, road deicers), and UV degradation. This coating system passes 1,500 hours of neutral salt spray testing without rust or peeling, ensuring durability in snowy, coastal, or mining regions where the DFAC CAPTAIN often operates

Designed for efficient replacement by fleet technicians, the bracket simplifies installation with user-friendly details. All mounting holes (chassis and bumper) are drilled to H8 tolerance, ensuring perfect alignment with the DFAC CAPTAIN’s M14 chassis bolts and M12 bumper bolts—avoiding cross-threading during assembly. The bracket’s weld joints are ground smooth to eliminate sharp edges that could damage adjacent components (e.g., wiring harnesses, brake lines). The package includes 4 grade 10.9 high-tensile bolts (M14×60mm for chassis, M12×40mm for bumper) and lock washers, pre-lubricated with molybdenum disulfide to prevent thread galling in high-temperature environments. Installation takes 40–50 minutes: remove the old bracket by detaching the bumper and chassis bolts, align the new bracket’s reference marks with the frame, torque the bolts to 200 N·m (chassis) and 150 N·m (bumper) per OEM specs, and verify bumper alignment. Each unit undergoes dimensional inspection via CMM, load-bearing testing, and weld quality checks, backed by a 24-month warranty against defects (e.g., cracking, coating peeling, dimensional inaccuracies)