Even steels with a high hole expansion capacity (HEC) can sometimes experience edge failures during forming if their fracture toughness is low. By evaluating fracture toughness, we have gained a deeper understanding of its relationship with the hole expansion ratio.

These insights have been crucial in developing HyperFlange, our advanced steel solution that combines high HEC with strong fracture toughness for superior edge ductility. With CP800 HyperFlange, you can reduce rejection rates, minimise edge cracks, and achieve better material flatness - leading to higher yields, fewer line stops, and improved press shop efficiency. 

70%

With a typical HEC value of 65% combined with an average A50 of 16%, the complex phase HR CP800-UC HyperFlange offers the freedom necessary for innovative chassis designs, even with deeper and wider flanges.  


FRACTURE TOUGHNESS

2x

Its fracture toughness is twice that of our HR XPF800-UC. When combined with the higher hole expansion capacity, CP800 HyperFlange delivers superior edge ductility and manufacturing robustness.


tENSILE STRENGTH

800 MPa

The high ultimate tensile strength allows for 15% reduction in weight compared to a high-strength low-alloy S420MC, as shown in our simulations using a redesigned lower control arm. The 800 MPa strength sweet spot is ideal for most press shops, aligning with the capabilities of their machines and expertise, while avoiding the additional expenses associated with utilizing 1000 MPa. 
 

Improved fuel economy and reduced CO₂ emissions are key drivers in the development of lightweight chassis components. When used in a suspension part that moves rapidly, the lightweighting effect of a CP800 HyperFlange translates to even higher CO₂ and energy savings per km driven.

The product’s superior edge ductility also translates to fewer part rejects, less material waste, and, overall, a lower CO₂ footprint.