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Super Duplex Stainless Steel Pipe ASTM A790 UNS32750 Oil Gas Chemical Tube Sheet
Overview
UNS S32750 is a stainless steel containing high chromium, high molybdenum, high nitrogen and low carbon for excellent corrosion resistance and high strength. It excels in highly chlorinated and acidic environments and is widely used in the chemical, oil and gas industries.
Heat treatment is the process of changing the organizational structure and properties of UNS S32750 through process treatments such as heating and cooling. Carbon is an important alloying element in UNS S32750 and has a great influence on the properties of UNS S32750.
Characteristic of ASTM A790 UNS32750
Corrosion resistance is one of the most prominent properties of UNS S32750, which is mainly influenced by elements such as chromium, nickel and molybdenum. Corrosion mechanism is the root cause of UNS S32750 corrosion damage, corrosion mechanism of the different corrosion mechanism on the corrosion performance of UNS S32750 material has a significant effect
Chemical Analysis
| C | N | P | Si | Mn | Mo | Ni | Cr | S | Other |
| 0.030 | 0.24/0.32 | 0.035 | 0.80 | 1.20 | 3.0/5.0 | 6.00/8.00 | 24.0/26.0 | 0.020 | Cu:0.50 |
Mechanical Properties
| Pipe Density | Pipe melting point | Pipe yield strength | Pipe tensile trength | Pipe elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi - 80000 , MPa - 550 | Psi - 116000 , MPa - 800 | 15 % |
Physical Properties of ASTM A790 UNS32750
| Density (Kg.m-1) | 7810 |
| Magnetic Permeability | 33 |
| Young’s Modulus (N/mm2) | 199 x 103 |
| Specific Heat, 20°C (J.Kg-1.°K-1) | 475 |
| Fracture Toughness, Kq (MPa.m) | 475 |
| Specific Electrical Resistance, 20°C (µO.m) | 0.80 |
| Thermal conductivity, 20°C (W.m-1.°K-1) | 14.2 |
| Mean coefficient of thermal expansion, 20-100°C (°K-1) | 11.1 x 10-6 |
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 |
Supplementary Testing : Apart from the above mentioned tests, we also carry out on the
manufactured products supplementary testing. The tests conducted
under this include:
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Application
Chemical
Oil and Gas
Pollution Control
Food
Agrochemicals
