Chimney Liner Metal Alloys

Chimney liner metal alloys range from 316TI to AL-29-4C. What is all this about? Keep in mind these different types of stainless steels are alloy differences. It has nothing to do with the actual thickness of the metal. In this article we will explain the multiple options you have in choosing liner metal and which one to use in different circumstances. You have to be very careful when choosing a chimney liner. Different metals are made for different appliances and fuel combination's.

The name stainless steel originates from the fact that stainless steel does not stain, corrode or rust as easily as ordinary steel. It is also the term for grades of steel that contain more than 10% chromium with or without other alloying elements.

Stainless steel resists corrosion, maintains it's strength at high temperatures and is easily maintained. For these reasons, it is used widely in items such as automotives, home and food processing products, as well as medical and health equipment. The most common types are: 304; 316; 316Ti; 316L; 29-4C.

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316TI Stainless Steel
316TI is a stainless steel alloy with a small amount of titanium added. It's make-up allows it to resist acids and the stresses of hot and cold cycles. It can be used with solid fuels (wood, coal and pellet), gas and oil. It can withstand temperatures up to 2100 degrees.

316L Stainless Steel
316L chimney liner metal is commonly found in some thicker flexible chimney liners as well as in rigid chimney liners. The titanium is left out because of the added thickness of liners made from 316L stainless steel. 316L stainless steel is acceptable for use with coal, wood, gas or oil systems.