Breakdown of Volkswagen Body-in-White: Mild-High-Strength-Hot-Formed Steel & Aluminum Application
Yield strength＜160 MPa Mild steel
DC01
DC03
DC04
CR4
Hot-dip galvanized mild steel: DX51D+Z, DX53D+Z, DX54D+Z
Application Locations:
Rear-wheel arch liners, non‑reinforced areas of trunk side panels, auxiliary sheet-metal parts for some exterior body panels, and several non-load-bearing mounting brackets.
Characteristics: It features excellent plasticity and good formability for stamping. It enables crash-energy absorption through deformation during collisions and shall not serve as load-bearing components.
Yield strength＜220 MPa High-Strength Steel
HC220YD
H220BD
DX52D+Z
Application Locations:
Front bumper brackets, engine-bay internal connecting plates, partial thin-gauge sheets inside doors, dash side panels.
Functions: Provide auxiliary structural support while balancing stamping formability and basic stiffness.
Yield strength＜420 MPa Extra-High-Strength Steel
HC340LA
HC420LA
DP450
Application Locations:
Complete floor pans, seat cross members, rocker inner reinforcements, mid-front rails, rear-house reinforcements, inner door frames.
Main load-carrying parts of vehicle body with optimized lightweight and rigidity.
Yield strength>1000 MPa Hot-Formed Steel
Corresponding Grade: Usibor-1500 (22MnB5, boron steel, corresponding brand of Baosteel: B1500HS, tensile strength approximately 1500 MPa).
Application Locations:
Full-range sections of A-pillars and B-pillars, roof side rails, main rocker-panel reinforcements, vehicle center tunnel, upper-door reinforcements and rear‑end cross members.
Functions: These form the vehicle’s core safety zone. They barely deform during crashes to prevent occupant-compartment intrusion. This material accounts for approximately 19.8% of the body-in-white for Golf 8.
Aluminum (Extruded Rocker Inserts)
6063-T6
Application in Rocker-panel inner inserts
Optimized material selection is the foundation of a reliable vehicle. Proper steel‑grade application brings better safety experience to end‑users. Contact us anytime for quotations and support.
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