Galvanized Low Carbon Steel (C1015): Most common flat wire belt material used because of low cost and resistance to rust in most plant environments. Galvanized steel can be used in temperatures up to 500 degrees (F), although it is usually limited to 350 degrees (F) as the galvanizing will flake off above this temperature.

Bright High Carbon Steel (C1045): This material is used in the 350 degrees (F) to 800 degrees (F) range for dry non-corrosive environments. High carbon steel provides for higher strength at elevated temperatures and has a greater resistance to abrasion than galvanized low carbon steel.

Type 201 Stainless Steel: This is Keystone's standard stainless material. Type 201 stainless steel is comparable to T-304 stainless in many respects, and it can provide some advantages over T-304 SS in certain applications. T-201 stainless is a lower cost stainless due to a lower nickel content. It also has higher tensile and yield strengths along with the hardness due to the addition of manganese. This can lead to increased wear resistance. Type 201 stainless exhibits similar corrosion resistance when compared with T-304 stainless steel. Keystone does not recommend T-201 stainless steel above 1000 degrees.

Type 304 Stainless Steel: It is highly resistant to most corrosive atmospheres and can be used in temperatures up to 1100 degrees (F). However, at temperatures above 800 degrees (F) there can be a loss of corrosive resistance.

Type 316L Stainless Steel: It is more resistant than T-304 stainless steel to sulfuric, acetic and phosphoric acids. At elevated temperatures, T-316L stainless is stronger and offers greater resistance to corrosion than T-304 stainless.