Graded Multi-material Body-in-White Solution: Material Layout Analysis of BYD Vehicle Structure
Hot-Formed Steel (Purple)
Material Features: Manufactured via hot stamping and die quenching. Its tensile strength reaches 1300–1500 MPa with ultra-high deformation resistance. It delivers superior forming accuracy and is ideal for complex closed structural components.
Application Locations: A-pillar, B-pillar, rocker reinforcement, roof side rail, door ring frame, center tunnel and other core occupant cabin frameworks.
Core Function: Restrains cabin deformation and resists intrusion during frontal and side impacts to preserve survival space for passengers. It serves as the most critical material for vehicle passive safety.
Commonly Used Domestic Grades (Mainstream for BYD Supply Chain): B1500HS / BR1500HS (Baosteel), PHS1500 (Shougang / HBIS)
Overseas Equivalent Grade: GMW15192M – Usibor 1500P
AHSS | Advanced High Strength Steel (Pink)
Material characteristics: Includes duplex steel DP, heat-treated hardened BH, and multiphase CP steel; offers both high strength and excellent elongation, balancing energy absorption and structural rigidity, suitable for complex curved surface stamping.
Application locations: B-pillar reinforcement plates, door impact reinforcement components, floor transverse reinforcement beams, upper longitudinal beams, wheel well reinforcement components.
Common domestic grades: HC550/980DP, HC420/780DP, B180H2 (heat-treated hardened steel)
Compared with GMW standard: CR420Y780T-DP, CR180B2
HSS | High Strength Steel (Blue)
Material Characteristics: Medium strength, excellent formability, moderate cost, suitable for large-area panels and ordinary structural components.
Application Locations: Vehicle floor, door inner panel, rear wheel cover, rear side panel inner panel, ordinary beam support components.
Common Domestic Brands: HC340LA, HC380LA, SPFH590
Benchmarking against GMW: CR340LA, CR380LA
Mild Steel | Low-carbon Soft Steel (Light Blue)
Material Characteristics: Excellent deep drawing performance, good plasticity, lowest cost; relatively low strength, not capable of bearing the main collision loads.
Application Areas: Exterior body panels, fenders, roof covers, rear door inner panels, etc. for appearance stamping parts.
Common Grades: DC04, DC06; GMW grades CR4, CR5
Aluminum | Aluminum Alloy (Green)
Material Characteristics: Significantly enhanced lightweight advantage, with a density only 1/3 that of steel, and excellent energy absorption properties.
Application Locations: Front impact beam (the green component at the front end in the figure), some battery pack supports.
Common Grades: 5754, 6061, 6016 automotive body aluminum sheets
R.Plastic | Modified Engineering Plastic (Yellow Reinforced Plastic)
Material Characteristics: Lightweight, high degree of design freedom, corrosion-resistant; does not withstand high-intensity impact loads.
Application Locations: Front bumper frame, radiator support frame.
Selecting proper automotive raw steel is the foundation of vehicle passive safety. We provide a full range of hot stamped steel, AHSS and HSS materials to support your lightweight & crash safety design. Feel free to reach out to us for material specification consultation and technical support.
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Automotive Steel Stainless Steel Coils & Sheets SUS304, 316L, 301, 321, 430
Stainless‑steel coils and sheets are alloy‑based steel products mainly composed of chromium, nickel and iron. A dense chromium‑rich passive film forms on the steel surface, providing excellent rust‑proof and oxidation‑resistant performance to prevent corrosion.
Electrogalvanized Steel Sheet – Automotive‑Grade Application
Electrogalvanized sheet is a kind of metal electrochemical deposition coating product with excellent processability, good corrosion resistance and coating performance, which can meet the processing of high-quality automotive body parts.
Automotive Steel high-quality cold-rolled electrical steel (silicon steel sheet)
We supply high-quality automotive cold-rolled electrical steel (automotive silicon steel sheet), including non-oriented and grain-oriented grades tailored for the automotive industry.
High Strength Automotive Steel CR330Y590T-DP CR440Y780T-DP CR440Y780T-DH CR700Y980T-DP
High‑strength automotive steel refers to advanced high‑strength steel (AHSS) designed for automobile manufacturing complying with VDA standards.
Cold Rolled DP Dual Phase Steel HC340/590DP
No yield extension, no room-temperature aging, low yield/tensile strength ratio, high strain hardening exponent and high bake hardening value.
Automotive 5000 & 6000 Series Aluminum Coil for Lightweight Vehicles
Aluminum coil is a long continuous sheet of aluminum alloy rolled into a coil shape. We mainly supply automotive-grade 5000series and 6000 series aluminum coils for vehicle Lightweighting.
Hot Dipped Galvanized Steel Coil
Hot Dipped Galvanized Steel Coil DX54D+Z HC420LAD+Z HC420/780DPD+Z HC700/980DPD+Z Automotive HDG AHSS Steel
Hot Rolling: SPHC, SPHD, SPHE, SPHT1/2/3, S355J0, S355JR, S355J2
All three grades are JIS G3131 standard hot rolled low-carbon steel, specially designed for automotive stamping & cold forming.
High Strength Hot Rolled Pickled Steel S550MC / S600MC / S650MC / S700MC
Hot Rolled Pickled High-Strength Structural Steel S550MC, S600MC, S650MC and S700MC. This series of steel conforms to EN 10149-2. It is high-strength hot rolled steel produced via thermomechanical rolling, specially designed for cold forming.
