What is ABREX?500 ABREX?500 is part of Nippon Steel’s ABREX™ series, engineered for high wear resistance (approximately 500?HBW hardness) champaksteel.com+11nipponsteel.com+11csecplates.com+11. Optimized for applications involving severe abrasion and impact, while retaining excellent weldability and formability nipponsteel.com+3pros