Home Businesses Aerospace Metal Composites Thank You Thank You Thank you for your interest in Materion Aerospace Metal Composites. Our team is working on your request and our goal is to respond to you as soon as possible to address your RoHS inquiry. Other Resources Upcoming Events Technical Resources: SupremEX® Data Sheets News & Research Materion receives second SAE-AMS Specification. This time for SupremEX® 640XA MMCs. Read the news release to learn more. New research with the Advanced Forming Research Centre shows SupremEX 225XE MMCs can be cost effectively made into automotive pistons. Read the SAE article.