AHL Corten Group. E-mail:info@ahl-corten.com. Wechat: +86 18937276360. Corten Steel. Weathering steel,also known as corten steel, is a series of low alloy steels between ordinary steel and stainless steel, which has a rusted appearance and corrosion resistance characteristics. BBQ Grill. Corten Steel | Metfab. Call (03) 9720 2653 Quick Enquiry