Applications for stainless steel can vary but some common examples include cookware, cutlery, sinks, aerospace components, medical device instruments, oil and gas lines, beverage applications, or laboratory instruments. Stainless steel is a good choice for applications where corrosion and heat resistance are important in material selection. More specifically, austenitic stainless steels are used for heat exchangers, food & beverage equipment, chemical equipment, and architectural applications. Ferritic stainless steels are used for automotive applications, appliance trim and cooking utensils. Martensitic stainless steels are used for fasteners and pump shafts. Precipitation hardening stainless steels are used for valves, gears, and petrochemical equipment. And duplex stainless steels are used across applications similar to austenitic and ferritic stainless steels. Examples include marine environments and pollution control equipment.