Although super duplex stainless steels are categorized as a duplex, the main difference between them is the content of chromium. While the content of chromium in duplex alloys is about 22%, the content for this element in Super Duplex 32760 Pipe is about 25% and higher. When the content of chromium is raised to a significant level, the corrosion resistance of the alloy also increases. For instance, the pitting resistance of ASTM A790 UNS S32760 Seamless Pipe (Seamless and Welded pipe) is at a much higher level in comparison to conventional stainless steel as well as duplex alloys.
Resistance to pitting of the ASTM A790 UNS S32760 Welded Pipe is calculated with the PREN value. The PREN value is an abbreviation of the Pitting Resistance Equivalent number. In this case, the PREN value for the super Duplex S32760 Seamless Pipe stands at 40.0. A value of 38 points or higher is indicative of superior resistance to pitting. Another vital characteristic of the SA 790 UNS S32760 Tube is that it exhibits high resistance to crevice corrosion.
Like some other duplex alloy grades, the material of astm a790 uns s32760 pipe is resistant to stress corrosion cracking, where conventional alloys like 316 fail. With a yield strength of 570 MPa, excellent resistance to SSC, and good ductility, including outstanding corrosion resistance in marine environments, the A790 S32760 Pipes is ideal for marine engineering.
| 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 |
| N | Mn | Si | P | S | Fe | r | Ni | Mo | C | W | Cu |
| 0.2-0.3 | 1.00 Max | 1.0 Max | 0.03 Max | 0.01 Max | Balance | 24.0-26.0 | 6.0-8.0 | 3.0-4.0 | 0.030 Max | 0.5-1.0 | 0.50-1.0 |
| Grade | Mechanicals | ||||
| Specification | UTS N/mm² (min) |
0.20% Proof (min) |
Elong % (min) |
Hardness HB (max) |
PREN |
| UNS S32760 | 750 | 550 | 25 | 270 | 40 |
| 0.2% Proof Stress (N/mm2 ) [ksi] minimum | 550 [79.8] |
| Ultimate Tensile Strength (N/mm2) [ksi] minimum | 750 [108.8]] |
| Elongation (%) minimum | 25 |
| Hardness (HBN) | 270max |
| Reduction of Cross Section Area (%) minimum | 45 |
| Charpy V-notch Impact at ambient Temp (J) [ft.lb] | 80min [59min] |
| Charpy V-notch Impact at -46°C (J) [ft.lb] | 45av, 35min [33av, 25.8min] |
| 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 | |||||||||||||
We have supplied S32760 stainless steel pipes and tubes to these places recently:
| ASTM A928 CL1 (UNS S32760), BE CASING PIPES B-36.19 | South Africa, Bahrain, Nigeria, Singapore |
| E.FS.W, 12.0 INCH super duplex uns s32760 Pipes | Australia, Singapore, Philippines, UK |
| 0.5" Sch. 40 Super Duplex SS A790 S32760 Pipes | United Arab Emirates (UAE), Turkey, Malaysia, Norway |
| 6" SCH 80S SDSS SEAMLESS PIPE ASME B36.19 ASTM A790 S32760 | Malaysia, Netherlands, Dubai, Russia |
| Sch 80S Super Duplex SS A790 S32760 | Indonesia, Dammam -KSA,Belgium, Philippines |
| 25 Cr Duplex Stainless Steel Seamless Pipes A790 S32760 | France, Qatar, Thailand, Europe |
| s32760 duplex 6" Pipe Sch.10S Material | UAE, Malaysia, Oman, Hong Kong |
| 6" NB x Sch.40 A790 UNS S32760 Pipes | Chile, Italy, Singapore, Iran |
| Ratnamani and ISMT make S32760 Stainless Steel Pipes | United Kingdom -UK, Europe, UAE, Malaysia |
| Super Duplex s32760 Pipe Class 2500 Sch.40S | Canada, UK, Ellington -United States,Poland |
| A-790 UNS S32760 Pipes Super Duplex SS | Malaysia, Japan, Europe, Romania |
| Class 2500 Sch.XS A790 S32760 Pipes | Sweden, Colombia, China, Malaysia |
| grade UNS S32760 Super Duplex Pipes | Malaysia, Taiwan, Philippines, Los Alamos -Mexico |
| SMLS PIPE 6" SCH 80S A790 UNS S32760 | Spain, Egypt, UK, Mexico |
| 14inh ASTM A790 SDSS UNS S32760 Sch 10S Pipes | Malaysia, Philippines, Canada, Brazil |
| UNS S32760 ASTM A928MCI welded pipes | Singapore, Saudi Arabia (KSA), South Africa |
| SCH 40S UNS S32760 Seamless Pipes | Kuwait, South Korea, Malaysia, Singapore, NY 12203 (USA) |
| ASTM A789 A790 UNS S32760 Seamless Stainless Steel Duplex Tube | Malaysia,Germany, Czechia, Thailand |
| ASTM A790 Gr UNS S32760 smls and welded pipes | USA, Malaysia, Finland, Bangladesh |
