Description
In Europe, high-strength screws and bolts class 8.8 or higher, obtained after heat treatment type quenching tempering, are produced from boron grades. Recently, there has been more competition from imported carbon grade parts coming from countries with low labor costs. This paper compares the potential of carbon steel grades versus boron steel grades for the production of bolts class 8.8 as defined by standard ISO 898.1. This study uses metallurgical investigations, mechanical tests, and modelling.