What is chassis stamping parts used for?

Chassis stamping parts are load-bearing, shock-absorbing and safety-critical metal components manufactured via blanking, bending, deep drawing, rib embossing and progressive die stamping. Fabricated from high-strength steel, galvanized steel and lightweight aluminum alloy, they form the entire vehicle’s undercarriage framework, applicable to fuel passenger cars, commercial vehicles and new energy electric vehicles. Their core functional purposes are categorized as follows:

1. Bear the full weight of the whole vehicle

Chassis stampings act as the main supporting skeleton. Subframe stampings, longitudinal beam reinforcing plates and suspension mounting brackets bear the weight of the engine, transmission, battery pack, passenger compartment and cargo. Integrated aluminum stamped battery trays for EVs fully carry lithium battery modules and cooling systems, distributing heavy loads evenly to avoid local deformation or fracture during long-distance driving.

2. Transfer and buffer vibration & road impact

Suspension stamped supports, shock absorber brackets, stabilizer bar clamps and control arm reinforcement sheets connect wheels to the vehicle body. When vehicles pass bumpy roads, these stamped metal structures cooperate with springs and dampers to transmit vertical and horizontal impact forces while absorbing shock energy. Optimized stamped rib structures reduce vibration transmission to the cabin, improving driving smoothness and comfort.

3. Improve vehicle rigidity & handling stability

Cross beams, side sills and underbody reinforcing stampings form a closed rigid frame of the chassis. They resist torsion and bending during sharp turning, rapid acceleration and emergency braking, minimizing body distortion. This stable structural performance enhances steering accuracy, prevents vehicle sway and upgrades overall driving controllability.

4. Absorb collision energy to protect safety

High-strength stamped energy-absorbing boxes, front/rear longitudinal beams and side chassis guard plates serve as passive safety structures. In frontal, rear or side collisions, these thin-wall stamped components crumple controllably to dissipate kinetic energy, blocking impact force from reaching the passenger compartment and EV battery packs. They effectively reduce the risk of passenger injury and battery thermal runaway.

5. Fix and protect undercarriage accessories

A large number of small stamped clips, brackets and splash shields are designed for component positioning and protection:

Pipeline fixing stampings: Secure brake tubes, cooling water pipes and high-voltage wiring harnesses to avoid friction damage from vibration.

Chassis splash guards & mud shields: Block gravel, rainwater, deicing salt and mud splashes to prevent corrosion on core chassis metal parts.

Auxiliary mounting brackets: Hold fuel tanks, cooling modules, exhaust components and sensors firmly in place.

6. Realize lightweight design for new energy vehicles

Aluminum alloy integrated chassis stampings replace traditional thick steel assemblies. Aluminum’s low density cuts overall chassis weight, lowering power consumption and extending EV cruising mileage. Stamped reinforcing ribs further boost structural strength without adding extra material weight, balancing lightweight demand and mechanical performance.

7. Resist long-term corrosion and extend service life

Most chassis stampings adopt galvanized steel or receive post-stamping anti-rust treatment. The stamped underbody protective covers and brackets isolate the main load-bearing frame from corrosive media such as rain, snow and road salt, slowing rust formation and avoiding strength attenuation caused by long-term outdoor exposure.

1. GBT National Standard Citation

GB/T 30571-2014, General technical specifications for metal cold stamping parts[S]. Beijing: China Standards Press, 2014.

2. APA 7th Edition 

Liu, S., & Zhang, L. (2024). Structural function and lightweight optimization of automotive chassis stamped components. Thin-Walled Structures, 196, 111412.

3. MLA 9th Edition 

Liu, Shuang, and Lei Zhang. "Structural Function and Lightweight Optimization of Automotive Chassis Stamped Components." Thin-Walled Structures, vol. 196, 2024, p. 111412,