THE MAD METALLURGY OF ADVANCED HIGH STRENGTH STEEL IN MODERN CARS

EV Channels Review

John Cadogan delves into the often-overlooked world of advanced high-strength steel (AHSS) in modern automotive manufacturing, using the 2018 Hyundai Santa Fe as a prime example. He highlights how AHSS significantly increases torsional stiffness (by 15.4%), contributing to better handling, a more predictable ride, and crucially, a safer passenger cell during collisions. The video contrasts AHSS with mild steel and high-speed steel, explaining its unique balance of strength (up to 1500 MPa) and workability (up to 25% elongation). Cadogan argues that this material science is 'proper engineering porn,' far more significant than flashy infotainment features. The increased use of AHSS allows manufacturers to reduce vehicle weight (potentially saving 100kg per vehicle), leading to improved fuel economy, acceleration, and braking, while also offering substantial environmental benefits through reduced steel consumption on a global scale. The review praises the material's role in creating a rigid safety cage and enabling crumple zones, making cars more survivable and predictable in crashes.