| Product Name: | SUPER DUPLEX STAINLESS STELL | Specification: | ASTM A790， ASME SA790 |
|---|---|---|---|
| Standard: | ASTM， ASME， And API | Material Grade: | UNS S32750 |
| Size: | 1/8″NB TO 30′ NB INCH | Schedule: | SCH20， SCH30， SCH40， STD， SCH80 |
| Length: | Single Random， Double Random & Cut Length. | End: | Plain End， Beveled End， Treaded |
| Type: | Seamless / ERW / Welded / Fabricated | ||
| High Light: | astm 1.4410 super duplex pipe， uns s32750 super duplex pipe， astm round duplex tubes | ||
ASTM A790 UNS S32750 ( 1.4410 ) SUPER DUPLEX Stainless Steel
ASTM A790 UNS S32750 is a Super duplex stainless steel with 25% chromium， 4% molybdenum， and 7% nickel material for seamless and welded pipes in duplex stainless steel alloy for general corrosive service， with particular emphasis on resistance to stress corrosion cracking (SCC) ， designed for demanding applications which require exceptional strength and corrosion resistance， such as chemical process， petrochemical， and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking， high thermal conductivity， and a low coefficient of thermal expansion.
Super Duplex 2507 offers greater corrosion resistance as well as increased strength as compared to the Duplex version， especially because of the presence of additional molybdenum， chromium and nitrogen content. We have Super Duplex S32750 which are used in offshore platforms， heat exchangers mechanical and structural components along with other seawater piping and chemical processing industries.
Specification
ASTM A790/A790M-20 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
| Specifications | ASTM A 790 ASME SA 790 |
| Standards | ASTM， ASME， and API |
| Size | 1/8″NB TO 30″NB IN |
| Schedule | SCH20， SCH30， SCH40， STD， SCH80 |
| Type | Seamless / ERW / Welded / Fabricated |
| Form | Round Pipes， Custom Pipes， Square Pipes， Rectangular Pipe， “U” Shape， Hydraulic Pipes |
| Length | Single Random， Double Random & Cut Length. |
| End | Plain End， Beveled End， Treaded |
Equivalent Grades:
| Grade | UNS No | WERKSTOFF NR. |
| Super Duplex S32750 | S32750 | 1.4410 |
Chemical Composition
| Grade | C max | Si max | Mn max | P max | S max | Cr | Ni | Mo | N |
| UNS S32750 | 0.030 | 0.8 | 1.2 | 0.030 | 0.015 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.24-0.32 |
| UNS S31803 | 0.030 | 1.0 | 2.0 | 0.020 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| UNS S31500 | 0.030 | 1.0 | 1.2-2.0 | 0.030 | 0.030 | 18.0-19.0 | 4.5-5.5 | 2.5-3.5 | 0.05-0.10 |
Mechanical Properties
Grade | Density | MeltingPoint | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
|---|---|---|---|---|---|
| S32750 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 ， MPa – 550 | Psi – 116000 ， MPa – 800 | 15% |
Physical Properties
| Grade | Y.S.MPa min | T.S.Mpa min | Elongation % | Hardness HRC |
| UNS S32750 | 550 | 800 | 15 | 20 |
| UNS S31803 | 450 | 620 | 25 | 20 |
| UNS S31500 | 440 | 630 | 30 | 20 |
Some of the quality tests carried out by us includes:
| Corrosion Test | Conducted only when specially requested by the client |
| Chemical Analysis | Test done as per required quality standards |
| Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests | Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms， which ensures trouble-free expansion， welding & use at customers end |
| Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing | 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage， and biggest pressure we can support 20Mpa/7s . |
| Air Under Pressure Test | To check any evidence of air leakage |
| Visual Inspection | After passivation， every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
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Applications
1. Chemical processing， Transport and Storage.
2. Oil and gas exploration and offshore rigs.
3. Oil and gas refining.
4. Marine environments.
5. Pollution control equipment.
6. Pulp and paper manufacturing.
7. Chemical process Plant.
