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Stainless Specification
 
Stainless Corrosion      
Grade Resistant Strength Life Span Maintenance
302SS poor best fair fair
304SS good best good fair
305SS good best good fair
316SS best good excellent excellent
17-4 PH fair excellent good fair

 

      Max Max Max Max   Max Copper Other
Stainless Chromium Nickel Carbon Mangen. Phosph. Sulpher Molybd. Silicon NA Elements
18-8 17-20% 8-13% .08% 2% 2% .03-15% NA 1% 0-4% NA
302 17-19% 8-10% .15% 2% .045% .03% NA 1% NA NA
303 18-20% 8-10% .15% 2% .02% .15% min .6 max 1% NA NA
304 18-20% 8-10.5% .08% 2% .45% .03% NA 1% NA NA
304L 18-20% 8-12% .03% 2% .045% .03% NA 1% NA NA
305 17-19% 10.5-13% .12% 2% .045% .03% NA 1% NA NA
316 (A-4) 16-18.5% 10.5-14% .08% 2% .045% .03% 2-3% 1% NA NA
316L 16-18% 11-14% .03% 2% .045% .03% 2-3% 1% NA NA
347 17-19% 9-13% .08% 2% .045% .03% NA 1% NA Columbium and tantalum- 10 times carbon
17-4 PH 15-17.5% 3-5% .07% 1% .04% .03% NA 1% 3-5% Carbon, boron, tantalum
Nitronic 50 20.5-23.5% 11.5-13.5% .06% 4-6% .04% .03% 1.5-3% 1% NA Carbon, boron, nitrogen, vanadium in minute quantities
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