Duplex Steel Round Bars Manufacturer & Supplier in India
Unifit Fastener is a reputed manufacturer and supplier of superior duplex steel round bars that are used in high-performance usage in various demanding industries. We also have duplex steel round bars, bright bars, hex bars, square bars, flat bars, rectangular bars, and forged bars, which are manufactured with the best quality raw materials in accordance with international standards. Our duplex steel grade includes UNS S32205 / UNS S31803, which is very tough in terms of mechanical strength and resistance to corrosion.
We provide duplex steel round bars with a uniform microstructure, which has a high resistance to pitting corrosion, crevice corrosion, and stress corrosion cracking. These bars have great tensile and yield strength and therefore can be used in severe environments such as offshore equipment, chemical processing units, heat exchangers, marine fittings, and oil and gas components. Diversity in finishes has made our products suitable for various fabrication needs, with some of their finishes being bright, polished, hot-rolled, and cold-drawn.
At Unifit Fastener, we are selling duplex steel bars in various sizes and different sizes so that we are guaranteed accuracy, longevity, and uniformity. Their strength and long-term reliability greatly allow them to find application in the production of shafts, valves, fasteners, pumps, and structural components. Unifit Fastener believes in quality and prompt delivery, and therefore, it has been supplying reliable duplex steel round bar products to industries across the world.
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Request QuoteTable of Contents
- What are Duplex Steel Round Bars?
- Specification of Duplex Steel Round Bars
- Send Your Enquiry
- Types of Duplex Stainless Round Bar
- Equivalents of Duplex Steel Round Bar
- Duplex Alloy Square Bar Chemical Composition
- Mechanical Properties Duplex Steel Round Bar
- Duplex Steel Round Bars Price List
- Applications of Duplex Steel Round Bars and Square Bars
- FAQs about Duplex Steel Round Bar
What are Duplex Steel Round Bars?
Duplex steel round bars are made using forging to create a solid, blowhole-free structure. They go through heat treatment to increase hardness and strength. Available in grades like UNS S31803 and S32205, these bars are strong, durable, and highly resistant to corrosion. They can withstand impact, pressure, and heavy loads without bending or breaking.
Duplex round bars are ideal for use in industries where strength and resistance to harsh conditions are important. They are suitable for making shafts, fasteners, valves, pumps, and other critical components that require long-lasting performance.
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Grades of Duplex Steel Fasteners
Specification of Duplex Steel Round Bars
Duplex steel round bars are engineered to meet stringent industrial specifications, ensuring high strength, corrosion resistance, and durability. They are available in various diameters, finishes, and conditions to suit different applications.
| Category | Details |
|---|---|
| Standard | ASTM A276, ASME SA276 |
| Dimensions | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Round Bar Size | Diameter: 3–800 mm |
| Hex Bar Size | 2–100 mm A/F |
| Flat Bar Size | Thickness: 2–100 mm, Width: 10–500 mm |
| Square Bar Size | 4–100 mm |
| Angle Bar Size | 3–20 mm × 20–12 mm × 100 mm |
| Rectangular Bars Section | 3.0–12.0 mm thickness |
| Channel Bar Size | 80 × 40 mm to 150 × 75 mm section; 5.0–6.0 mm thickness |
| Hollow Bar Size | 32 mm OD × 16 mm ID to 250 mm OD × 200 mm ID |
| Billet Size | 1/2–495 mm Diameter |
| Rectangular Size | 33 × 30 mm to 295 × 1066 mm |
| Hex Bars Finish | Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, rough turned, bright, polish, grinding, centreless ground & black |
| Hollow Bar Tolerance | H8, H9, H10, H11, H12, H13, K9, K10, K11, K12, or as per client’s requirements |
| T-Bar Surface | Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline |
| Flat Bars Condition | Hardened & tempered, annealed |
| Cold Rolled Bar Technique | Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar, Rod |
| Rod Processing | Bar cutting to 650 mm |
| Rounds Bar Form | Round, Rod, T-Bar, Channel Bar, Precision Ground Bar, Flat Bar, Square, Blocks, Round Rod, Rings, Hollow, Triangle, Rectangle, Hex (A/F), Threaded, Half Round Bar, Profiles, Billet, Ingot, I/H Bar, Forging, etc. |
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Types of Duplex Stainless Round Bar
Duplex Round Bars
DSS Hex Bar
Duplex Stainless Flat Bars
Duplex Steel Rod
Duplex SS Rounds
SS Duplex Bars
Duplex Alloy Annealed Bar
Duplex Square Bars
Stainless Steel Duplex Bright Bar
DSS Polished Bars
Steel Duplex Black Bar
DSS Round Bars Cold Drawn
DSS Flat Bars
DSS Round Bars
DSS Square Bar
DSS Flat Bars Cold Drawn
Equivalents of Duplex Steel Round Bar
Duplex steel round bars are equivalent to Werkstoff 1.4462 and UNS S31803/S32205, offering reliable mechanical properties and compatibility with international standards.
| Product | Werkstoff Nr. | UNS |
|---|---|---|
| Duplex Round Bar | 1.4462 | S31803 / S32205 |
Duplex Alloy Square Bar Chemical Composition
Duplex alloy square bars consist of controlled levels of chromium, nickel, molybdenum, nitrogen, and other elements. This composition ensures excellent corrosion resistance and mechanical strength.
| Grade | C (max) | Mn (max) | Si (max) | P (max) | Mo (%) | Ni (%) | N (%) | Fe (min) | S (max) | Cr (%) |
|---|---|---|---|---|---|---|---|---|---|---|
| S31803 | 0.030 | 2.00 | 1.00 | 0.030 | 3.0–3.5 | 4.50–6.50 | 0.14–0.20 | 63.72 | 0.020 | 22.0–23.0 |
| S32205 | 0.030 | 2.00 | 1.00 | 0.030 | 2.50–3.50 | 4.50–6.50 | 0.18–0.20 | 63.54 | 0.020 | 21.0–23.0 |
Mechanical Properties Duplex Steel Round Bar
Duplex steel round bars exhibit high yield strength, tensile strength, elongation, and hardness, making them ideal for structural, marine, and chemical industry applications.
| Property | Minimum Value | Maximum Value |
|---|---|---|
| Yield Strength (0.2% Proof, MPa) | 450 | – |
| Tensile Strength (MPa) | 655 | – |
| Elongation (% in 50 mm) | 25 | – |
| Hardness (HB) | – | 293 |
Duplex Steel Round Bars Price List
Duplex steel round bars are available in a range of sizes with corresponding weights and prices in USD and AED, ensuring easy selection and cost planning for industrial projects.
| Size | KGS / MTR | KGS / Foot | Price (USD) | Price (AED) |
|---|---|---|---|---|
| 3 mm | 0.055 | 0.017 | $4.21 | 15.44 |
| 1/8″ | 0.062 | 0.019 | $4.23 | 15.53 |
| 5/32″ | 0.095 | 0.029 | $4.25 | 15.62 |
| 4 mm | 0.098 | 0.03 | $4.28 | 15.71 |
| 3/16″ | 0.141 | 0.043 | $4.30 | 15.80 |
| 5 mm | 0.154 | 0.047 | $4.33 | 15.88 |
| 7/32″ | 0.19 | 0.058 | $4.35 | 15.97 |
| 6 mm | 0.223 | 0.068 | $4.37 | 16.06 |
| 1/4″ | 0.249 | 0.076 | $4.40 | 16.15 |
| 7 mm | 0.298 | 0.091 | $4.42 | 16.24 |
| 5/16″ | 0.387 | 0.118 | $4.45 | 16.33 |
| 8 mm | 0.398 | 0.12 | $4.47 | 16.41 |
| 9 mm | 0.498 | 0.152 | $4.49 | 16.50 |
| 3/8″ | 0.557 | 0.17 | $4.52 | 16.59 |
| 10 mm | 0.62 | 0.189 | $4.54 | 16.68 |
| 11 mm | 0.748 | 0.228 | $4.57 | 16.77 |
| 7/16″ | 0.761 | 0.232 | $4.59 | 16.86 |
| 12 mm | 0.889 | 0.271 | $4.61 | 16.94 |
| 1/2″ | 0.994 | 0.303 | $4.64 | 17.03 |
| 13 mm | 1.043 | 0.318 | $4.66 | 17.12 |
| 14 mm | 1.207 | 0.368 | $4.69 | 17.21 |
| 9/16″ | 1.256 | 0.383 | $4.71 | 17.30 |
| 15 mm | 1.391 | 0.424 | $4.74 | 17.39 |
| 5/8″ | 1.551 | 0.473 | $4.76 | 17.47 |
| 16 mm | 1.578 | 0.481 | $4.78 | 17.56 |
| 17 mm | 1.791 | 0.543 | $4.81 | 17.65 |
| 11/16″ | 1.88 | 0.573 | $4.83 | 17.74 |
| 18 mm | 2.001 | 0.61 | $4.86 | 17.83 |
| 3/4″ | 2.237 | 0.682 | $4.88 | 17.91 |
Applications of Duplex Steel Round Bars and Square Bars
- Chemical and Petrochemical Industry: Used in equipment like heat exchangers, pressure vessels, tanks, and reactors due to excellent corrosion resistance.
- Oil & Gas Industry: Ideal for pipelines, offshore platforms, and drilling equipment exposed to seawater and harsh chemicals.
- Marine Industry: Used in shipbuilding, seawater piping, and desalination plants for their high resistance to pitting and crevice corrosion.
- Power Generation: Employed in boilers, condensers, and turbine components where strength and corrosion resistance are critical.
- Construction & Structural Applications: Suitable for bridges, structural frameworks, and architectural components requiring durability and strength.
- Automotive & Engineering: Used in mechanical parts, fasteners, shafts, and high-stress components for superior toughness.
- Food & Pharmaceutical Industry: Ideal for hygienic applications, equipment, and piping due to resistance to chemicals and easy maintenance.
FAQs about Duplex Steel Round Bar
What is a Duplex Steel Round Bar?
Duplex steel round bar is a high-strength, corrosion-resistant alloy combining austenitic and ferritic properties, ideal for industrial and structural applications.
What grades are available for Duplex Steel Round Bars?
Common grades include S31803 and S32205, which correspond to Werkstoff 1.4462 and UNS standards, offering excellent mechanical and chemical properties.
What Duplex steel round bars sizes are available?
Available in diameters from 3 mm to 800 mm, with various shapes like round, square, flat, hex, T-bar, channel, hollow, and rectangular bars
Can Duplex Steel Round Bars be customized?
Yes, they can be cut to required lengths, supplied in different surface finishes, and tolerances can be customized according to client requirements.