Stainless Steel Grades. As stainless steel suppliers, our products are frequently used for engineering and industrial applications. Their general properties include strength, corrosion resistance, and fabrication characteristics. Below is an overview of the types of stainless steels, as well as their properties and industry uses. 200 Series stainless steel 404, stainless steel 404 Suppliers and Manufacturers AISI 404 Stainless Steel Pipe Tube With Competitive Price Jinan Zunkai Materials Co., Ltd.