Duplex stainless steel - Fine Tubes - #1

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w w w. f i n e t u b e s . c o m Introduction Manufacturing Specifications Seamless tube: NFA 49 217 Seamless and welded tube: ASTM A789 Seamless and welded pipe: ASTM A790 Fine Tubes Production Specification: FT1077 & FT2349 Size Range for Seamless Tubing www. f i n e t u b e s . com e 112 - august 2008 duplex stainless steel Fine Tubes UNS31803 is a duplex stainless steel (austenitic-ferritic) characterised by: • high resistance to stress corrosion cracking in chloride-bearing environments • high resistance to stress corrosion cracking in environments containing hydrogen sulphide • high resistance to general corrosion, pitting and crevice corrosion • high mechanical strength-roughly twice the yield strength of austenitic stainless steel • high resistance to erosion corrosion and corrosion fatigue • good thermal conductivity properties • good weldability Datasheet Standards UNS EN W.Nr SS S31803 1.4462 1.4462 2377 DIN X2 CrNiMoN 22 5 3 AFNOR Z 2 CND 22 5 3 Straight Lengths Coils 0 1.8 3.2 4.5 6.4 8.0 12.7 19.0 27.0 30.0 35.0 45.5 0 1/18 1/8 3/18 1/4 5/18 1.2 3/4 1 1/16 1 3/16 1 3/8 1 3/4 SWG 44 40 36 34 30 26 24 22 20 16 12 9 7 4 mm ins mm wall OD ins 0.188 0.144 0.104 0.064 0.033 0.028 0.022 0.018 0.012 0.009 0.007 0.005 0.003 0 4.77 3.85 2.84 1.83 0.90 0.70 0.58 0.48 0.30 0.23 0.18 0.13 0.08 0