Auto stamping parts cover almost all parts of the vehicle body, chassis, engine, electric powertrain components for new energy vehicles, interior, and safety systems. A traditional gasoline-powered vehicle contains 1,500 to 2,500 stamped parts. Although the structure of new energy vehicles is simplified, the proportion of high-precision stamped parts such as battery pack housings, electric drive brackets, and hot-formed safety components is actually higher.
Auto Stamping Parts (AS/MS) are automotive-specific components produced by applying pressure to sheet metal using a press and molds at room temperature or high temperature, causing separation or plastic deformation to meet specific dimensional, shape, and strength requirements. AS/MS is characterized by its suitability for mass production, high efficiency, and low cost; strong part consistency; suitability for standardized and automated assembly; ability to form complex surfaces, reinforcing ribs, flanges, and holes in a single process; and significant lightweighting potential. AS/MS serves as a core component for lightweight vehicle bodies and must meet the stringent strength, fatigue, corrosion resistance, and safety standards of the automotive industry.
Auto stamping parts can be categorized in many ways, but based on forming process, they can be divided into four types:
Cold stamping parts: Formed at room temperature, this is the most widely used type, offering high efficiency, low cost, and good surface quality. These mainly include door inner panels, hoods, fenders, brackets, and reinforcing plates.
Hot stamping parts: Boron steel is heated to over 900℃ and stamped, achieving a strength of 1500MPa after quenching. This results in ultra-high strength, significant lightweighting, and extremely high collision safety, making them core components for the safety structure of new energy vehicles.
Precision stamped parts: These have a completely bright cross-section, free of tears and burrs, and exhibit extremely high precision. They are suitable for engine mounts, gearbox gear plates, and chassis precision brackets, with tolerances down to ±0.02mm, and can replace some machined parts.
Deep-drawn parts: These are three-dimensional shell-forming parts, such as oil pans, battery pack covers, muffler housings, and spare tire wells.
Based on the parts and functions of a car, Auto Stamping Parts can be further classified into the following categories:
Body structural components, A-pillar, B-pillar, etc. Columns, floor panels, longitudinal beams, transverse beams, and door rings: high-strength, high-fatigue, and collision-critical components, primarily using high-strength steel and hot-formed steel;
Body panel components: doors, hood, tailgate, fenders, and roof; high appearance requirements, complex curves, large dimensions, and moderate rigidity requirements;
Chassis stamped parts: suspension brackets, control arms, subframes, and swing arms; high vibration, high load, and strict fatigue requirements, primarily using high-strength steel and aluminum alloys;
New energy vehicle-specific stamped parts: battery pack covers, lower trays, electric drive housings, high-voltage connectors, and water-cooled plates; high sealing requirements, lightweight, strict corrosion resistance, and high strength;
Powertrain stamped parts: brackets, heat shields, flanges, flywheel discs, and muffler components; key characteristics are high temperature resistance, high vibration, and stable precision;
Small and medium-sized structural components and brackets: various mounting brackets, fixing plates, reinforcements, and clips; large quantity, high versatility, and cost-sensitive.
When purchasing Auto Stamping Parts, the following parameters must be clearly defined, otherwise it is very easy to receive the wrong product. Many users are concerned about dimensional tolerances, typically ±0.1～±0.5mm, and ±0.02～±0.05mm for precision parts; positional tolerances, as mounting hole positions directly affect assembly, usually require ±0.1mm; and surface quality, free from cracks, wrinkles, pitting, scratches, and burrs.
When purchasing Auto Stamping Parts, it is essential to follow a standardized process. First, clearly define your requirements, including drawings/samples, materials, material thickness, surface treatment, precision, quantity, application scenarios, and standards. Select manufacturers capable of small-batch trial production to verify product stability. Require each batch to provide a shipment inspection report, material certificate, and dimensional inspection report.
Auto stamping parts may seem ordinary, but they are actually highly systematic, standardized, and heavily regulated core automotive components. The success of procurement depends not on price, but on material matching, reasonable processes, controllable precision, stable quality, and compliance with regulations.