Jiaxing MT stainless steel co.,ltd.
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2205 Duplex Steel Tube , ASTM A789/SA789 Seamless Stainless Steel Tubing Cold Rolled
Duplex stainless steel grades must be cooled as quickly as possible to room temperature after hot forming to avoid the precipitation of intermetallic phases (Sigma phase in particular) which drastically reduce the impact resistance at room temperature as well as the corrosion resistance..
Alloying elements Cr, Mo, W, Si increase the stability and the formation of intermetallic phases. Therefore super duplex grades have a higher hot working temperature range and require faster cooling rates than the lean duplex grades.
| Grade
| TP 304; TP304H; TP304L; TP316; TP316L; TP 321;TP321H; TP317L; TP310S; TP347H |
| Standard
| ASTM A213, ASTM A 269, ASTM A 270,EN10216-5; ASTM B 622;ASTM B516;ASTM A789, etc |
| Size | OD: 3.18- 101.6 MM |
| WT: 0.5- 20MM | |
| Length: Fixed Length Or Random Length | |
| Advantage | Superior surface finish ,better mechanical property; more precise dimension; perfect inspection method and inspection equipment |
| Application | Boiler tube applies to petroleum,chemical industry,electric power,boiler,high temperature resistant,low temperature resistant,corrosion resistant.The size can be made according to the customers requirements.High pressure boiler pipe applies to container,petrochemical and so on.Note:Generally,high pressure boiler pipe’s working pressure above 9.88Mpa and working temperature between 450 to 650. |
| Package | Plywood case; woven bag |
| UNS Designation | C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu |
| max | max | max | max | max | ||||||
| S31803 | 0.03 | 1 | 2 | 0.03 | 0.02 | 21.0 - 23.0 | 4.5 - 6.5 | 2.5 - 3.5 | 0.08 - 0.20 | - |
| S32205 | 0.03 | 1 | 2 | 0.03 | 0.02 | 22.0 - 23.0 | 4.5 - 6.5 | 3.0 - 3.5 | 0.14 - 0.20 | - |
| S32750 | 0.03 | 0.8 | 1.2 | 0.035 | 0.02 | 24.0 - 26.0 | 6.0 - 8.0 | 3.0 - 5.0 | 0.24 - 0.32 | 0.5 max |
| S32760 | 0.05 | 1 | 1 | 0.03 | 0.01 | 24.0 - 26.0 | 6.0 - 8.0 | 3.0 - 4.0 | 0.20 - 0.30 | 0.50 -1.00 |
