ASME SA789 SMLS UNS S32205 Duplex Steel Bend U Boiler Tubes
YuHong Group can offer SA789/A789 UNS S32205 duplex steel bend U tubes and we sell these products with highest quality in more than 70 countries.
ASME SA789 / ASTM A789 This specification covers grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.
Specifications
| Sizes / Thickness | OD: 0.25"- 6" ; W.T: 0.02" - 0.5" or as required by clients |
| Manufacture | Shall be made by the seamless or welded process with no filler metal added. |
| Heat Treatment | For seamless tubes, as an alternate to final heat treatment in a continuous furnace or batch-type furnace, immediately following hot forming while the temperature of the tubes is not less than the specified minimum solution treatment temperature, tubes may be individually quenched in water or rapidly cooled by other means. S32205---(1020-1100℃) Quench:rapid cooling in air water |
| Length | As required by clients |
| Surface Condition | All tubes shall be free of excessive mill scale, suitable for inspection. A slight amount of oxidation will not be considered as scale. |
| Bending Radius | From 1.5*OD(Outside Diameter) To 1500mm, ≤1.5*OD,necessary To agree precision of geometrics |
| Straight Tubes | max length 35000mm |
U tubes are made by bending straight tubes and bending is done cold on an automatic U-bend. For ensuring tube wall thinning and diameter ovality are controlled, tube bending is accomplished with a mandrel inserted into the tube. Besides, the U-bend of the U-tube is stress relieved under controlled conditions and cycles for extended life.
Duplex stainless steels are called “duplex” because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel.Whilst duplex stainless steel are considered resistant to stress corrosion cracking, they are not as resistant to this form of attack as ferritic stainless steel. Duplex stainless steel are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.Duplex S32205 stainless steel is used extensively in applications that require good corrosion resistance and strength.It is also used extensively in applications that require good corrosion resistance and strength.
Test Required Bend U tube
Corrosion Test
Chemical Analysis
Reverse-bend and Re. flat tests
Eddy Current Testing
Hydrostatic Testing
Visual Inspection
Mechanical Tests: Tension test, Flattening test, Flaring test, Flange test, Hardness Test and Hydrostatic test
Chemical Composition UNS S32205
| Chemical Composition Max | C | Mn | P | S | Si | Ni | Cr | Mo | N |
| 0.03 | 2 | 0.03 | 0.02 | 1 | 4.5-6.5 | 22-23 | 3-3.5 | 0.14-0.2 |
Mechanical Property
| Steel Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | Hardness max |
| UNS S32205 | 655min | 485min | 25min | 290HBW 30 HRC |
Applications Industry
Pharmaceutical Equipment
Power Generation
Petrochemicals
Pressure Vessel
Heat Exchangers / Condensers / Boiler
Oil and Gas Processing
Specialty Chemicals
General Engineering
Pulp and Paper Industry
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ASME SA789 SMLS UNS S32205 Duplex Steel Bend U Boiler Tubes Images
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