Principal Metals Principal Metals is a leading worldwide supplier of specialty metals. Combining our vast inventory with a wide range of fabrication capabilities, we are often able to meet your requirements when no other supplier can. In addition to highlighting the products we offer, our website gives you access to a tremendous diversity of information designed to help you every day. We hope that you find what you need during your visit and that you take a moment to bookmark our site. As an active customer of Principal, we offer you free access to our in-house library and we are always willin