Maduka Metals, based in Abuja, Nigeria, stands out as a top-notch manufacturer and supplier of high-quality industrial metals, with a special focus on premium Alloy 20 Round Bars. Known for its dedication to precision, durability, and customer satisfaction, Maduka Metals caters to a variety of industries, including chemical processing, marine, and power generation. The company skillfully blends advanced manufacturing techniques with rigorous quality control to ensure that its products meet international standards. The Alloy 20 Round Bars from Maduka Metals are designed to resist corrosion, maintain their structural integrity under high stress, and deliver reliable performance in tough industrial settings, making them a go-to choice for engineers and fabricators alike.
These Alloy 20 Round Bars are primarily made up of nickel (32–38%), iron (39–44%), and chromium (19–21%), with added copper (2–3%) and molybdenum (2–3%) to boost corrosion resistance. This austenitic alloy showcases remarkable resistance to both oxidizing and reducing acids, including sulfuric acid. On the mechanical side, Alloy 20 Round Bars provide a tensile strength of 620–850 MPa, yield strength of 310–450 MPa, and hardness that ranges from 187–217 HB. The blend of toughness, ductility, and thermal stability enables it to endure high-stress applications while remaining durable in harsh chemical environments.
Alloy 20 Round Bar Specification : ASTM B473 , ASME SB473
Dimension Standard : EN, DIN, JIS, ASTM, BS, ASME, AISI
Size : 14mm-300mm
Thickness : 50 mm to 6000 mm Long
Length : 1 To 6 Meters, Custom Cut Length
Form : Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc.
| Grade | C | Mn | Si | S | Cu | Ni | Cr | Fe | Mo | P |
|---|---|---|---|---|---|---|---|---|---|---|
| Alloy 20 | 0.07 max | 2.00 max | 1.00 max | 0.035 max | 3.00 – 4.00 | 32.00 – 38.00 | 19.00 – 21.00 | 29.85 min* | 2.00 – 3.00 | 0.045 max |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|---|
| Alloy 20 | 8.1 g/cm3 | 1443 °C (2430 °F) | Psi -80,000, MPa -551 | Psi – 35,000, MPa – 241 | 30 % |
| STANDARD | UNS | WNR. | EN | AFNOR |
|---|---|---|---|---|
| Alloy 20 | N08020 | 2.4660 | NiCr20CuMo | Z2NCUD31-20AZ |
Type | SIZES (mm) | ISO Tolerance | SIZES (Inches) |
|---|---|---|---|
Peeled and Polished | 40.00 to 150.00 | h11-DIN 1013 | 1.50″ to 6.00″ |
Cold Drawn and Ground | 10.00 to 75.00 | h9-h8-h11-h10 | 5/6″ to 2.50″ |
Cold Drawn and Polish | 3.00 to 75.00 | h9-h8-h11-h10 | 1/8″ to 3.00″ |
Peeled and Ground | 20.00 to 50.00 | h10-h9-h11 | 3/4″ to 2.00″ |
Cut to size on request (tolerance +2/-0 mm). Standard lengths of Alloy 20 Bars 2000 mm up to 6000 mm available
50.0 | 6.0 |
65.0 | 9.0 |
55.0 | 7.0 |
45.0 | 5.0 |
70.0 | 10.0 |
60.0 | 8.0 |
75.0 | 12.0 |
90.0 | 20.0 |
80.0 | 16.0 |
130.0 | 30.0 |
100.0 | 25.0 |
160.0 | 35.0 |
120.0 | 40.0 |
Choose the right Alloy 20 Round Bar based on factors like corrosion resistance, strength requirements, and compatibility with your specific application environment.
The pressure rating of Alloy 20 Round Bar depends on factors such as size, temperature, and specific application conditions, typically determined through engineering calculations.
Yes, Alloy 20 Round Bar can be welded, offering excellent weldability with proper techniques.
Alloy 20 Round Bars find their place in industries that demand outstanding corrosion resistance and mechanical strength. They’re frequently used in chemical processing plants, especially for equipment that deals with sulfuric acid, nitric acid, and other aggressive chemicals. Moreover, they play a vital role in pumps, valves, heat exchangers, and tanks within the marine and petrochemical sectors. Thanks to their resistance to pitting and crevice corrosion, they are also well-suited for the power generation and pharmaceutical industries. Plus, their excellent fabricability allows for precise machining and welding, ensuring long-lasting reliability and performance in critical industrial applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Maduka Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Abuja, Nigeria
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