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DESIGN FEATURES 316/316L

• 316 is resistant to dilute solutions (1-5%) of sulfuric acid to 49ºC (120ºF), except in some oxidising acids, where 316 is less resistant than 304.
• 316 is susceptible to inter granular corrosion in the as-welded condition
• 316 is prone to carbide precipitation from 427ºC to 816ºC (800ºF to 1500ºF)
• Corrosion resistance can be restored by post-welding annealing
• 316L offers same composition but with less than 0.03% carbon
• 316L presents similar corrosion resistance and other characteristics as 316 but with added resistance to inter granular attack in the as-welded condition or with short exposures in the 427ºC to 816ºC (800ºF to 1500ºF) range
• 316L is appropriate in applications where it’s impossible to avoid exposure in the carbide precipitation range and when post-welding annealing isn’t practical; lengthy exposure in this range may make the material brittle and susceptible to inter granular attack
• 316 maximum temperature for scaling resistance is 899ºC (1650ºF) in continuous service and 816ºC (1500ºF) in intermittent service applications
• 316L has a slightly lower pressure rating at very high temperatures compared to 316
• Susceptible to stress-corrosion cracking
• Slightly magnetic in the cold-worked condition
• Nonmagnetic and non harden able in the annealed condition
• Enhanced resistance to chlorides