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Ayten Tube Fittings, located in Addis Ababa, Ethiopia, has made a name for itself as a top-notch manufacturer and supplier of high-quality Duplex Steel Hydraulic Fittings. The company is committed to providing durable, high-performance fittings that are designed to operate reliably in tough hydraulic systems. With a keen emphasis on precision, innovation, and quality control, Ayten Tube Fittings guarantees exceptional resistance to pressure, corrosion, and wear. Their Duplex Steel Hydraulic Fittings are crafted to ensure leak-free, long-lasting connections across various industries, including oil and gas, marine, petrochemical, and power generation, establishing Ayten as a trusted player in Ethiopia’s industrial manufacturing landscape.
Duplex Steel Hydraulic Fittings are made up of chromium (21–23%), nickel (4.5–6.5%), molybdenum (2.5–3.5%), manganese, and nitrogen, creating a balanced dual-phase structure of ferrite and austenite. This unique composition offers remarkable mechanical properties, boasting a tensile strength of 620–850 MPa and a yield strength of 450–550 MPa. Duplex steel is known for its impressive resistance to pitting, stress corrosion cracking, and fatigue. The material’s outstanding toughness and strength ensure that the fittings can handle high-pressure hydraulic operations while remaining durable and resistant to chemical and environmental wear.
| DESIGN STANDARD | DIN 2353/ ISO 8434-1 |
| MATERIAL | DUPLEX 2205 |
| SERIES | LL- LOW PRESSURE , L- MEDIUM PRESSURE, S- HIGH PRESSURE |
| WORKING PRESSURE | 1 BAR TO 700 BAR |
| SIZE RANGE | 6 MM TO 42 MM |
| CONNECTIONS | TUBE TO TUBE , TUBE TO MALE THREAD , TUBE TO FEMALE THREAD , TUBE TO BUTT WELD , TUBE TO SOCKET WELD , TUBE TO JIC 37* , TUBE TO 24* CONE, TUBE TO SWIVEL END , TUBE TO ADJUSTBALE STANDPIPE |
| WELD NIPPLE TO MALE THREAD , WELD NIPPLE TO FEMALE THREAD , WELD NIPPLE TO BUTT WELD , WELD NIPPLE TO SOCKET WELD , WELD NIPPLE TO 24* CONE , WELD NIPPLE TO 37* JIC , WELD NIPPLE TO SWIVEL | |
| BODY TYPE | FORGED, BAR STOCK |
| SURFACE | EXPORT BRIGHT FINISH, SHORT BLASTED FINISH, ELECTROPLATED FINISH |
ELEMENT | DUPLEX 2205 | DUPLEX 31803 |
|---|---|---|
NI | 4.50 – 6.50 | 4.50 – 6.50 |
C | 0.030 max | 0.030 max |
MN | 2.00 max | 2.00 max |
P | 0.030 max | 0.030 max |
S | 0.20 max | 0.020 max |
SI | 1.00 max | 1.00 max |
CR | 21.0 – 23.0 | 22.0 – 23.0 |
MO | 2.50 – 3.50 | 3.0 – 3.5 |
N | 0.08 – 0.20 | 0.14 – 0.20 |
FE | 63.54 min | 63.72 min |
| Grade | YS (MPa) | UTS (MPa) | % Elongation | Hardness(BHN) |
| 31803 | 450 min. | 620 min. | 25 min. | 293 max. |
| 2205 | 450 min. | 655 min. | 25 min. | 293 max. |
| Density (Kg.m-1) | 7810 |
| Magnetic Permeability | <50 |
| Young’s Modulus (N/mm2) | 190 x 10^3 |
| Specific Heat, 20°C (J.Kg-1.°K-1) | 400 |
| Specific Electrical Resistance, 20°C (µO.m) | 0.85 |
| Thermal conductivity, 20°C | 15 |
| Mean coefficient of thermal expansion | 11 x 10^-6 |
| STANDARD | WERKSTOFF NR. | UNS |
|---|---|---|
| Duplex 2205 Plate | 1.4462 / 1.4462 | UNS S31803 / UNS S32205 |
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Duplex Steel Hydraulic Fittings find their place in applications that demand high strength, pressure resistance, and corrosion protection. They are frequently used in hydraulic systems for oil and gas exploration, petrochemical facilities, marine engineering, and offshore drilling operations. These fittings are particularly suited for harsh environments that involve seawater, chemicals, and extreme temperatures. Moreover, they are also employed in power generation, mining, and construction equipment, guaranteeing reliable performance and leak-proof hydraulic connections. Their blend of durability, mechanical strength, and corrosion resistance makes them indispensable for modern industrial hydraulic systems.
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