This grade, with its molybdenum content slightly higher than 316/316L, is the most corrosion resistant of the 300 series alloys and possesses the highest tensile and creep strength properties at elevated temperatures. It is designed for use in pharmaceutical, chemical, and pulp & paper processing equipment to reduce product contamination to a minimum. The .03 maximum carbon content of this grade enables use in applications where it is not possible to anneal after welding, and further enhances corrosion resistance.
Corrosion Resistance: Improved resistance over all other 300 series alloys.
Heat Resistance: Good oxidation resistance in intermittent service to 1600°F [871°C] and in continuous service to 1700°F [927°C]. Continuous use of 317/317L in 800 – 1575°F [427 – 857°C] is acceptable, as it is more resistant to carbide precipitation, and often performs well in temperatures fluctuating above and below this range.
Heat Treatment: Solution anneal and quench – heat to min. 1900°F [1040°C] and liquid cool immediately below 500°F [260°C] for maximum corrosion resistance. This grade cannot be hardened by thermal treatment.
This grade is available in all flanges and fittings.
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