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Help CenterDuplex 2205 Stainless Steel Rod 25mm 30mm 35mm Diameter ASTM A479
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Welcome to Hemaokang Steel (Shandong) Co., Ltd. – your reliable partner for high-performance duplex stainless steel solutions. Our Duplex 2205 Stainless Steel Rods in 25mm, 30mm, and 35mm diameters, manufactured in strict compliance with ASTM A479, combine exceptional strength and corrosion resistance, making them ideal for demanding environments. With our factory established in 2025 and annual export value exceeding US$50 million, we bring you precision-engineered rods that meet global standards, backed by ISO9001 certification. Whether you need standard sizes or custom lengths, our rods are designed to deliver superior performance in oil and gas, chemical processing, and marine applications.
Product Overview: Duplex 2205 is a nitrogen-enhanced duplex stainless steel with a microstructure of approximately 50% austenite and 50% ferrite. This unique balance provides nearly double the yield strength of conventional 316L stainless steel, while maintaining excellent resistance to stress corrosion cracking, pitting, and crevice corrosion. Our ASTM A479 compliant rods are available in 25mm, 30mm, and 35mm diameters, with uniform roundness and tight tolerances for seamless integration into your projects.
Key Features & Technical Specifications
- High Strength: Yield strength ≥ 450 MPa (65 ksi) – significantly higher than austenitic grades, enabling lighter and more cost-effective designs.
- Excellent Corrosion Resistance: PREN (Pitting Resistance Equivalent Number) ≥ 35, offering superior resistance to chlorides, acids, and aggressive media.
- Good Weldability: Suitable for standard welding processes with proper filler metals, maintaining mechanical properties and corrosion resistance in the heat-affected zone.
- Wide Temperature Range: Serviceable from -50°C to 300°C (-58°F to 572°F) with stable mechanical properties.
- Precise Dimensions: Diameters of 25mm, 30mm, and 35mm with tolerance per ASTM A479 (typically ±0.5mm). Lengths can be customized from 1m to 12m.
- Surface Options: Available in bright (cold drawn), black (hot rolled with oxide scale), or pickled (acid cleaned) finish to suit your downstream processing needs.
| Parameter | Value |
|---|---|
| Material Grade | UNS S31803 / S32205 (Duplex 2205) |
| Standard | ASTM A479 / ASME SA479 |
| Diameter Tolerance | ±0.5 mm (for 25-35mm) |
| Chemical Composition (Typical) | C: 0.03 max, Cr: 22-23, Ni: 4.5-6.5, Mo: 3.0-3.5, N: 0.14-0.20 |
| Tensile Strength | ≥ 620 MPa (90 ksi) |
| Yield Strength (0.2% offset) | ≥ 450 MPa (65 ksi) |
| Elongation | ≥ 25% |
| Hardness (Brinell) | ≤ 290 HB |
Benefits to Your Application: By choosing our Duplex 2205 rods, you gain a material that reduces weight and thickness compared to 316L, lowering overall project costs. The exceptional resistance to chloride stress corrosion cracking makes it the preferred choice for heat exchangers, pressure vessels, and offshore platforms. Our rods are also fully traceable with mill test certificates, ensuring compliance with international standards.
Trust & Reliability
As a newly established but rapidly growing enterprise, Hemaokang Steel (Shandong) Co., Ltd. has already achieved an impressive annual export volume of US$50 million to US$100 million, serving clients across North America, South America, Europe, Asia, Africa, and Oceania. Our team of 51-100 skilled professionals ensures rigorous quality control at every stage – from raw material sourcing to final inspection. We are proud to be ISO9001 certified, reflecting our commitment to consistent quality and customer satisfaction. Every rod is manufactured in our modern facility in Liaocheng, Shandong, China, with state-of-the-art equipment and experienced technicians.
We understand that in demanding industries, material failure is not an option. That's why we provide comprehensive documentation, including material test reports, chemical analysis, and mechanical property data. Our flexible packaging options (bundled, wooden crates, or as per your requirement) ensure safe delivery worldwide. With competitive pricing, short lead times, and dedicated customer support, we are your trusted partner for duplex stainless steel products.
Ready to source high-quality Duplex 2205 rods? Contact us today for a quotation or technical consultation. Let Hemaokang Steel be your reliable supply chain partner.
Frequently Asked Questions (FAQ)
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Q: What is the difference between Duplex 2205 and standard 316L stainless steel?
A: Duplex 2205 offers approximately twice the yield strength of 316L and significantly better resistance to stress corrosion cracking and pitting, especially in chloride-rich environments. It is a cost-effective alternative when high strength and corrosion resistance are required. -
Q: Can these rods be supplied in custom lengths?
A: Yes, we offer custom lengths ranging from 1 meter to 12 meters. Please specify your exact requirement when placing an order. -
Q: What surface finishes are available?
A: We provide bright (cold drawn), black (hot rolled with oxide), and pickled (acid cleaned) finishes. The choice depends on your application and subsequent machining or welding needs. -
Q: Do you provide material test certificates (MTC)?
A: Absolutely. Every shipment includes a mill test certificate per ASTM A479, showing chemical composition, mechanical properties, and heat number for full traceability. -
Q: What is the typical lead time for orders?
A: For standard diameters (25mm, 30mm, 35mm) and lengths, lead time is 7-15 days after order confirmation. Custom sizes may require additional time. We prioritize urgent requests with our efficient production planning. -
Q: Are these rods suitable for welding?
A: Yes, Duplex 2205 can be welded using standard techniques (TIG, MIG, SMAW) with appropriate filler metals such as ER2209. Proper procedures should be followed to maintain corrosion resistance and mechanical properties. -
Q: What is the minimum order quantity (MOQ)?
A: Our MOQ is typically 500 kg per diameter, but we can accommodate smaller trial orders for new customers. Please contact our sales team for details. -
Q: How do you ensure quality control?
A: We follow ISO9001 quality management system. Each rod undergoes dimensional inspection, surface defect check, and mechanical testing. Random samples are sent to third-party labs for verification when required.
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