DN200 ASTM A790 SAF2205 / 1.4462 Big Size Duplex Steel Pipe For Food Industry
Duplex stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steels . “ Duplex ” describes a family of stainless steels that are neither fully austenitic , like 304 stainless , nor purely ferritic , like 430 stainless . The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy ( stress corrosion cracking resistance and high strength ) with those of an austenitic alloy ( ease of fabrication and corrosion resistance ) .
Use super duplex stainless steel pipes can improve corrosion resistance compared to other materials . And super duplex steel pipes have greater tensile and yield strength , good ductility and yield strength , good stress corrosion cracking resistance . Also can help clients reduce their purchase costs , but can gurantee the quality etc .
Material Grade S32205 , S31803 , S32304 , S32750, F51 , F53 , 2205 , 2507 etc
10.3mm – 1219mm
Wall Thickness 1.24mm – 54.59mm
Length as per customer’s requirement
ASTM A789 ; ASTM A790 ; EN 10216-5ect .
Grade C Si Mn P S Cr Ni Mo N
max max max max max
UNS S32750 0.03 0.8 1.2 0.03 0.015 24.0-26.0 6.0-8.0 3.0-5.0 0.24-0.32
UNS S31803 0.03 1 2 0.02 0.02 21.0-23.0 4.5-6.5 2.5-3.5 0.08-0.20
Grade Y.S.MPa min T.S.Mpa min Elongation % Hardness HRC /
UNS S32750 550 800 15 20 /
UNS S31803 450 620 25 20 /