Super duplex stainless steels are classified as duplex, but their key distinction is how much chromium they contain. While chromium is present in duplex alloys at a level of about 22 percent, it is present at a level of at least 25 percent in Super Duplex 32760 Pipe. The alloy's resistance to corrosion also rises when the amount of chromium is significantly increased. In contrast to duplex alloys and standard stainless steel, ASTM A790 UNS S32760 Seamless Pipe (Seamless and Welded pipe) has a substantially better level of pitting resistance.
The ASTM A790 UNS S32760 Welded Pipe's resistance to pitting is computed using the PREN value. The Pitting Resistance Equivalent number is referred to as the PREN value. The super Duplex S32760 Seamless Pipe's PREN value in this instance is 40.0. Superior resistance to pitting is indicated by a rating of 38 points or higher. The SA 790 UNS S32760 Tube's excellent resistance to crevice corrosion is another essential quality.
The material of astm a790 uns s32760 pipe is resistant to stress corrosion cracking, when standard alloys like 316 fail, like several other duplex alloy grades. The A790 S32760 Pipes are perfect for maritime engineering because they have a yield strength of 570 MPa, great resistance to SSC, strong ductility, and outstanding corrosion resistance in marine settings.
| 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 & Sth. | 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 |
