Development of Innovative Steel Grades and Their Applications in Automotive Structures

Innovative AHSS Products from AK Steel

Coated Bake Hard 440 provides light weighting opportunities for  surface- - critical applications

Next Generation AHSS 1000 and 1200 with improved elongations over Dual Phase steels with equivalent strength

NITRONIC ® ® 30 existing stainless steel grade with optimized cost, good formability, high strength, corrosion resistant and premium surface finish

NanoSteel NXG™ 1200 3 rd generation AHSS, for high strength and great formability in multiple applications

Light Weighting Case Studies

Review 5 case studies:

• CS1: BH440 Exposed Door Study

• CS2: Full Size Truck on Frame Front Structure

• CS3: B-Size Sedan Door Ring Study

• CS4: B-Sized Sedan PHS vs Cold Stamping

• CS5: C Size Sedan Small Offset Rigid Barrier (SORB) Considerations:

• Only major load cases are evaluated

• All parts are reviewed for stamping feasibility

• Other load cases will affect results

• More savings can be achieved if materials are considered early in the design process

Results:

• Reduce mass of the selected parts by  29.2  kgs

• Stamping feasibility complete

• Meets front crash requirements

• Plan for reducing torsional rigidity effects

Product Highlights

Applications of Next Generation, BH440 and NanoSteel

• Energy absorbing parts

• Parts needing improved formability and high strength

• Part consolidation

• Extremely high strength parts

• Mass reduction• Exposed panel mass reduction

Ongoing customer projects to:

• Fully implement with other load case considerations

− Durability

− NVH

− Crash

− Local loading requirements