ASTM A789 / ASME SA789 Stainless Steel Duplex Tube for Seawater Treatment
ASTM A789 / ASME SA789 Stainless Steel Duplex Tube for Seawater Treatment
Super duplex stainless such as duplex is a mixed microstructure of austenite and ferrite which has improved strength over ferritic and austenitic steel grades . The main difference is super duplex has a higher molybdenum and chromium content which gives the material greater corrosion resistance .
Super duplex has the same benefits as its counterpart - it has lower production costs when compared with similar ferritic and austenitic grades and due to the materials increased tensile and yield strength , in many cases this gives the purchaser the welcomed option of purchasing smaller thicknesses without the need to compromise on quality and performance .
| Standard | ASTM A789 / ASME SA789 , ASTM A790 / ASME SA790 , EN10216-5 Etc |
| Material | UNS S31803 , UNS S32205 , UNS S32304 , UNS S32750 , UNS S32760 , ETC . |
| Outer Diameter | 6.00mm - 48.00mm |
| Wall Thickness | 0.71mm - 2.11mm |
| Length | Normally fixed length 6m , can as per customer’s requirement |
| Ends | PE / Plain Ends , BE / Beveled Ends |
| Surface Treatment | Pickling / Bright Annealing |
| Heat Treatment Condition | Solution Annealing and water rapid quenched, Bright Annealing,Stess Relieving Heat Treatment for U tubes |
| Test Requirement | Eddy Current Test , Hydrostatic Test , UT , Penetrant Test , Air underwater pressure Test , |
| PMI Test , Spectro Test , Intergranular Corrosion Test , Sharpy Impact Test , Hardness Test , | |
| Tension Test ( Elongation , Yield Strength , Tensile Strength ) , Flarring Test etc . | |
| Application | Gas and Fluid Transportation ; Mechanical Pipline ; Engineering Projects ; Petrochemical industry ; Power Station |
Terms & Conditions :
1 . Price Term : FOB , CFR , CIF or as negotiation
2 . Payment : T / T , L / C or as negotiation
3 . Delivery time : 30 working days after received your deposit ( Normally according to the order quantity )
4 . Package : Iron case ; woven bag or as per customer’s requirement
5 . Quality Requirement : Mill Test Certificate will be supplied with shipment , Third Part Inspection is acceptable
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