As the duplex and super duplex stainless steel has both the advantages of ferritic stainless steel and the austenitic stainless steel, they are widely used to produce heat transferring tubing for petrochemical industry, sea water treatment.... in aggressive acidic, chloride containging environments. Lifeng Tube supply duplex tubes with high quality. Grade: UNS S31803, S32205, S32750, S32760, S32707....
Applications
Heater, Heat Exchanger, Condenser, Instrumentation, pipe lines....
Standard
ASTM/ASME A/ SA789 Seamless and welded Ferritic/Austenitic Stainless Steel Tubing for General Service
ASTM/ASME A/SA790 Seamless and welded Ferritic/Austenitic Stainless steel pipe
Chemical Content of typical Duplex Stainless Steel
Grade | c | Mn | P | S | Si | Cr | Ni | Mo | N | Cu |
UNS S32101 | 0.03 Max | 2.0 Max | 0.03 Max | 0.03 Max | 1.0 Max | 20.0-23.0 | 1.0-3.0 | 0.6 Max | 0.05-0.17 | 1.0 Max |
UNS S32304 | 0.03 Max | 2.5 Max | 0.04 Max | 0.04 Max | 1.0 Max | 21.5-24.5 | 3.0-5.5 | 0.05-0.6 | 0.05-0.20 | 0.05-0.6 |
UNS S31803 | 0.03 Max | 2.0 Max | 0.03 Max | 0.03 Max | 1.0 Max | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
|
UNS S32205 | 0.03 Max | 2.0 Max | 0.03 Max | 0.03 Max | 1.0 Max | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 |
|
UNS S32750 | 0.03 Max | 1.2 Max | 0.035 Max | 0.03 Max | 0.8 Max | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 | 0.5 Max |
UNS S32760 | 0.05Max | 1.0 Max | 0.03 Max | 0.03 Max | 1.0 Max | 24.0-26.0 | 6.0-8.0 | 3.0-4.0 | 0.20-0.30 | 0.5-1.0 |
UNS S32707 | 0.03 Max | 1.5 Max | 0.035 Max | 0.03 Max | 0.5 Max | 26.0-29.0 | 5.5-9.5 | 4.0-5.0 | 0.30-0.50 | 1.0 Max |
GB | ASTM | UNS | DIN |
|
022Cr23Ni4MoCuN | S32304 | S32304 | 1.4362 | SAF2304(Sandvik) |
022Cr22Ni5Mo3N | S31803 | S31803 | 1.4462 | - |
022Cr23Ni5Mo3N | S32205 | S32205 | 1.4462 | SAF2205(Sandvik) |
022Cr25Ni7Mo4N | S32750 | S32750 | 1.4410 | SAF507(Sandvik) |
022Cr25Ni7Mo3WCuN | S31260 | S31260 | - | - |
03Cr25Ni6Mo3Cu2N | S32550 | S32550 | 1.4507 | UR25+ |
022Cr25Ni7Mo4WCuN | S32760 | S32760 | 1.4501 | Zeron100 |
00Cr27Ni7Mo5N | S32707 | S32707 | - | SAF2707(Sandvik) |
Available Size
Products | OD | WT | Length |
Inch | MM | Inch | MM | Inch | Meter |
Tube | 1/2”-3” | 12-76.2 | 0.02”-0.5” | 0.5-12.0 | 105’ | 32 |
Pipe | NPS 1/2”-10” | 21.34-273.05 | Sch10-Sch80 | 2.11-12.7 | 98’ | 30
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