This grade, with its molybdenum content slightly higher than Type 316 is the most corrosing resistant of the 300 series alloys and posesses the highest tensile and creep strength properties at elevated temperatures. It is designed for use in pharmaceutical, chemical and pulp and paper processing equipment to reduce product contamination to a minimum.

Type 317L with its .03 maximum carbon content is used in applications where it is not possible to anneal after welding and where maximum corrosion resistance is required.

Corrosion Resistance: Improved resistance over Type 316. Often successfully applied where Type 316 has given only moderate performance.

Heat Resistance: Good oxidation resistance in intermittent service to 166 degrees F and in continuous service to 1700 degrees F. Continuous use of 317 in 800 degrees.1575 degrees F range is not recommended but often performs well in temperatures fluctuating above and below this range. Type 317L is more resistant to carbide precipitiation and can be used in the above temperature range.

Heat Treatment: Annealing-heat to 1850-2050 degrees F and cool rapidly for maximum corrosion resistance. These grades cannot be hardened by any form of thermal treatment.

Welding: Good welding characteristics suited to all standard methods. Use 317L or 309Cb filler rods or electrodes. Welded sections on Type 317 require post weld annealing for maximum corrosion resistance.

Typical Applications
Sodium sulphate evaporators
Starch size containers
Insulation strapping
Acetic acid distillation columns and condensers
Pulp and paper machinery
Inc manufacturing and dyeing equipment.