Particularly when compared to austenitic alloys, duplex stainless steel alloys often have better mechanical and corrosion resistance qualities. For instance, ASTM A790 UNS S32750 Seamless Pipe (Seamless and Welded pipe) has nearly twice the mechanical strength of austenitic steels. The alloy's remarkable corrosion resistance and superb mechanical qualities have been linked to its chemistry. A super Duplex S32750 Seamless Pipe's chemical make-up also includes the inclusion of 25% chromium, 4% molybdenum, and 7% nickel.
The chemical processing sector, petrochemical refineries, and seawater equipment are among the industries that can benefit from this composition. Despite having many intriguing characteristics, the ASTM A790 UNS S32750 Welded Pipe's outstanding resistance to chloride ion stress corrosion cracking stands out the most. Stress corrosion cracking problems are typically impossible to solve with standard stainless steel alloys. However, the ASTM A790 UNS S32750 pipe is particularly resistant to chloride ion stress corrosion cracking because to the heterogeneous microstructure of the alloy and the presence of chromium. The SA 790 UNS S32750 Tube's outstanding resistance to problems including pitting, crevice corrosion, and general corrosion are among its other crucial characteristics.
| Standard Specification | ASTM A 312/ ASME SA 312/ A790/ SA790/ EN10216-5 |
| Size | ½” to 6” NB Sch 10s, 40s, & 80s, 160s |
| Wall Thickness | 0.1 - 60 mm |
| SS Seamless Pipe Length |
|
| Seamless SS Pipe Surface Finish | Cold Finish, Bright, Polished, Annealing, Pickling, or as per client requirements |
| Standard | JIS, AISI, ASME, ASTM, AMS, GB, DIN, EN, GOST |
| Manufacturing types | Seamless, Welded, ERW, EFW |
| Manufacturing Shapes | Round, Square, Rectangle, Box Section |
| Manufacturing Technology | Hot / Cold Formed |
| Other Grades | SS 446 |
| Inspection, Test Reports | EN 10204 3.1, Mill Test Certificates, PMI Test Reports, Chemical Reports, Mechanical Reports, NABL Approved Lab Reports, Visual Inspection Reports, Destructive and Non Destructive Test Reports, Third Party Inspection |
| Technique | Cold Rolled Hot Rolled |
| Element | Composition, % |
|---|---|
| TypeC | 2507 |
| Carbon | 0.03 max |
| Manganese | 1.20 max |
| Phosphorus | 0.035 max |
| Sulfur | 0.020 max |
| Silicon | 0.80 max |
| Nickel | 6.0 - 8.0 |
| Chromium | 24.00 - 26.0 |
| Molybdenum | 3.0 - 5.0 |
| Nitrogen | 0.24 - 0.32 |
| Copper | 0.5 |
| Process | Value |
|---|---|
| TypeA | 2507 |
| Annealing Temperature °F [°C] | 1880–2060 [1025–1125] |
| Quenching | Rapid Cooling in Water |
| Property | Value | |
|---|---|---|
| TypeA | 2507 | |
| Tensile Strength, min, ksi, [MPa] | 116 [800] | |
| Yield Strength, min, ksi [MPa] | 80 [550] | |
| Elongation in 2 in. or 50mm, min, % | 15 | |
| Hardness, max | HBW | HRC |
| 300 | 32 | |
| NPS Designator | Permissible Variations in Outside Diameter | |
|---|---|---|
| Over In. | Under In. | |
| 1/8 to 1-1/2, incl | 1/64 (0.015) | 1/32 (0.031) |
| Over 1-1/2 to 4, incl | 1/32 (0.031) | 1/32 (0.031) |
| Over 4 to 8, incl | 1/16 (0.062) | 1/32 (0.031) |
| Over 8 to 18, incl | 3/23 (0.093) | 1/32 (0.031) |
| PIPE SIZE | OD IN INCHES | A.S.A. Pipe Schedules | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5s | 5 | 10s | 10 | 40s & Std. | 40 | 60 | 80s & E.H. | 80 | 120 | 160 | DBL E.H. | ||
| 1/8 | .405 | .035.1383 | .049.1863 | .049.1863 | .068.2447 | 068.2447 | 0.95.3145 | 0.95.3145 | |||||
| 1/4 | .540 | .049.2570 | .065.3297 | .065.3297 | .088.4248 | 088.4248 | .119.5351 | .119.5351 | |||||
| 3/8 | .675 | .049.3276 | .065.4235 | .065.4235 | .091.5676 | .091.5676 | .126.7338 | .126.7338 | |||||
| 1/2 | .840 | .065.5383 | .065.5383 | .083.6710 | .083.6710 | .109.8510 | .109.8510 | .1471.088 | .1471.088 | .1871.304 | .2941.714 | ||
| 3/4 | 1.050 | .065.6838 | .065.6838 | .083.8572 | .083.8572 | .1131.131 | .1131.131 | .1541.474 | .1541.474 | .2181.937 | .3082.441 | ||
| 1 | 1.315 | .065.8678 | .065.8678 | .1091.404 | .1091.404 | .1331.679 | .1331.679 | .1792.172 | .1792.172 | .2502.844 | .3583.659 | ||
| 1-1/4 | 1.660 | .0651.107 | .0651.107 | .1091.806 | .1091.806 | .1402.273 | .1402.273 | .1912.997 | .1912.997 | .2503.765 | .3825.214 | ||
| 1-1/2 | 1.900 | .0651.274 | .0651.274 | .1092.085 | .1092.085 | .1452.718 | .1452.718 | .2003.631 | .2003.631 | .2814.859 | .4006.408 | ||
| 2 | 2.375 | .0651.604 | .0651.604 | .1092.638 | .1092.638 | .1543.653 | .1543.653 | .2185.022 | .2185.022 | .3437.444 | .4369.029 | ||
| 2-1/2 | 2.875 | .0832.475 | .0832.475 | .1203.531 | .1203.531 | .2035.793 | .2035.793 | .2767.661 | .2767.661 | .37510.01 | .55213.70 | ||
| 3 | 3.500 | .0833.029 | .0833.029 | .1204.332 | .1204.332 | .2167.576 | .2167.576 | .30010.25 | .30010.25 | .43714.32 | .60018.58 | ||
| 3-1/2 | 4.000 | .0833.472 | .0833.472 | .1204.973 | .1204.973 | .2269.109 | .2269.109 | .31812.51 | .31812.51 | .63622.85 | |||
| 4 | 4.500 | .0833.915 | .0833.915 | .1205.613 | .1205.613 | .23710.79 | .23710.79 | .28112.66 | .33714.98 | .33714.98 | .43719.01 | .53122.51 | .67427.54 |
| 4-1/2 | 5.000 | .24712.53 | .35517.61 | .71032.53 | |||||||||
| 5 | 5.563 | .1096.349 | .1096.349 | .1347.770 | .1347.770 | .25814.62 | .25814.62 | .37520.78 | .37520.78 | .50027.04 | .62532.96 | .75038.55 | |
| 6 | 6.625 | .1097.585 | .1097.585 | .1349.290 | .1349.290 | .28018.97 | .28018.97 | .43228.57 | .43228.57 | .56236.39 | .71845.30 | .86453.16 | |
| 7 | 7.625 | .30123.57 | .50038.05 | .87563.08 | |||||||||
| Medium Type = Wall thickness in inches Bold Type = Steel weight per foot in pounds | |||||||||||||
