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UNS S32750 Super Duplex Steel Round Bars
496.0 INR/Kilograms
Product Details:
- Processing Peeled, Centerless Ground, Turned, Polished
- Grade S32750
- Diameter 6 mm to 400 mm, Custom Sizes
- Application Oil & Gas, Chemical Processing, Marine, Petrochemical, Power Generation
- Technique Hot Rolled & Cold Drawn
- Material UNS S32750 Super Duplex Steel
- Length 100 mm to 6000 mm, Custom Cut Lengths
- Click to view more
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UNS S32750 Super Duplex Steel Round Bars Price And Quantity
- 1 Kilograms
- 496.0 INR/Kilograms
UNS S32750 Super Duplex Steel Round Bars Product Specifications
- S32750
- Peeled, Centerless Ground, Turned, Polished
- UNS S32750 Super Duplex Steel
- 100 mm to 6000 mm, Custom Cut Lengths
- ASTM A276, ASTM A479, ASME SA276, ASME SA479
- Oil & Gas, Chemical Processing, Marine, Petrochemical, Power Generation
- Manufacturing, Engineering, Machining Components
- 6 mm to 400 mm, Custom Sizes
- Hot Rolled & Cold Drawn
- H9, H11, H13 or As Required
- Round Bar
- Bright, Black, Rough Turned, Polished
- Excellent to pitting and crevice corrosion
- Magnetic
- 7.8 g/cm3
- Seaworthy Packing, Wooden Boxes, Bundled
- Annealed & Pickled / Solution Annealed
- Rockwell C 32 max
- 550 MPa min
- 795 MPa min
- 15% min
Product Description
UNS S32750 is the unified numbering system designation for one of the most widely used super duplex stainless steel grades in the worldmost commonly known by its proprietary brand name, SAF 2507 (and its European equivalent Werkstoff Nr. 1.4410).
As a super duplex alloy, it features a highly engineered 50/50 balanced microstructure of austenite and ferrite. This dual-phase structure gives UNS S32750 round bars exceptional mechanical strength alongside outstanding resistance to localized corrosion and stress corrosion cracking.
Technical Profile
1. Chemical Composition (Wt% per ASTM A276 / A479)
The high additions of Chromium, Molybdenum, and Nitrogen are highly controlled to maximize corrosion resistance without causing phase instability during welding or heat treatment.
| Element | Minimum % | Maximum % |
| Chromium (Cr) | 24.00 | 26.00 |
| Nickel (Ni) | 6.00 | 8.00 |
| Molybdenum (Mo) | 3.00 | 5.00 |
| Nitrogen (N) | 0.24 | 0.32 |
| Carbon (C) | 0.030 | |
| Copper (Cu) | 0.50 | |
| Manganese (Mn) | 1.20 | |
| Silicon (Si) | 0.80 | |
| Iron (Fe) | Balance | Balance |
2. Guaranteed Mechanical Properties (ASTM A479 for Hot-Finished Bars)
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Tensile Strength ($R_m$): $ge 750 text{ MPa}$ ($109 text{ ksi}$)
-
Yield Strength ($0.2% text{ Offset}$): $ge 550 text{ MPa}$ ($80 text{ ksi}$)
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Elongation (in 2 inches): $ge 25%$
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Hardness: Maximum 32 HRC (typically restricted to $le 28 text{ HRC}$ or 270 HBW when intended for NACE sour service compliance).
3. Pitting Resistance Equivalent Number (PREN)
UNS S32750 is strictly formulated to hit a very high PREN value, certifying its resistance to localized chloride pitting:
$$text{PREN} = % text{Cr} + 3.3(% text{Mo}) + 16(% text{N}) ge 41$$
Critical Engineering Advantages
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Weight Reduction: Because its yield strength is double that of conventional austenitic stainless steels (such as 316L), engineers can reduce wall thickness or specify smaller bar diameters in structural or pressure-containing components, minimizing overall weight and material costs.
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Chloride Stress Corrosion Cracking (SCC) Immunity: While standard 300-series stainless steels rapidly succumb to SCC in hot, chloride-rich environments, the ferritic phase within UNS S32750 makes it highly resilient against this catastrophic failure mode.
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Erosion and Fatigue Resistance: The high mechanical hardness provides strong resistance to abrasive fluid wear and erosion-corrosion, making it an ideal choice for high-velocity pump shafts, impellers, and rotors.
Common Applications for Round Bars
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Oil & Gas: Subsea manifolds, Christmas tree components, downhole tooling, valve stems, bolts, and heavy-duty fasteners for sour environments ($H_2S$).
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Marine & Desalination: High-pressure pump shafts, propulsion shafts, seawater handling valves, and reverse osmosis (RO) high-pressure piping flanges.
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Chemical Processing: Reboilers, heat exchangers, and agitator shafts handling highly corrosive organic/inorganic acids or chlorinated media.
Manufacturing Specifications & Quality Standards
When procuring UNS S32750 rods or bars, they are typically ordered, manufactured, and certified according to these international standards:
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ASTM A276: Standard Specification for Stainless Steel Bars and Shapes.
-
ASTM A479: Standard Specification for Stainless Steel Bars for Use in Boilers and Other Pressure Vessels.
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NORSOK MDS D57: Requirements for Super Duplex round bars used in the petroleum industry.
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NACE MR0175 / ISO 15156: Materials for use in $H_2S$-containing environments in oil and gas production.
High-Performance Material for Critical Industries
S32750 Super Duplex Steel Round Bars are crafted to meet the rigorous demands of oil & gas, petrochemical, marine, and power generation industries. Blending exceptional strength with extraordinary corrosion resistance, these bars excel where reliability is paramount. Their dual-phase microstructure ensures remarkable resilience against cracking and pitting, making them ideal for aggressive chemical environments.
Customization and Quality Assurance
Available in diameters from 6 mm up to 400 mm and lengths spanning 100 mm to 6000 mm, S32750 round bars cater to both standard and bespoke requirements. Manufactured with precise tolerances (H9, H11, H13), each bar undergoes strict quality checks, ensuring consistent performance. Delivered in seaworthy packaging - wooden boxes, bundles, or as requested - they guarantee safe transport and easy handling.
FAQ's of UNS S32750 Super Duplex Steel Round Bars:
Q: What are the primary applications for UNS S32750 Super Duplex Steel Round Bars?
A: These round bars are prominently used in the oil & gas, chemical processing, marine, petrochemical, power generation, manufacturing, and engineering industries. Their robustness and corrosion resistance make them ideal for environments exposed to harsh chemicals and saline conditions.Q: How do UNS S32750 round bars benefit my project compared to conventional stainless steel bars?
A: UNS S32750 offers superior mechanical properties, including higher yield and tensile strength, as well as enhanced resistance to pitting and crevice corrosion. This translates into greater durability, reliability, and lifespan for components in aggressive conditions.Q: Where are these round bars produced and exported from?
A: S32750 round bars are manufactured, fabricated, and exported by reputable suppliers, traders, and manufacturers in India, serving both domestic and international clients across critical industries.Q: What processing options and finishes are available for UNS S32750 round bars?
A: The bars can be processed through peeling, centerless grinding, turning, and polishing. Available finishes include bright, black, rough turned, and polished, allowing for adaptation to your specific engineering or machining requirements.Q: When should I consider using UNS S32750 round bars for my application?
A: Choose S32750 round bars when you require high strength, superior corrosion resistance (especially to pitting and crevice corrosion), and durability in challenging environments, such as subsea operations, chemical plants, or marine infrastructure.Q: What packaging methods are used for these round bars during delivery?
A: The round bars are packed using seaworthy methods, including wooden boxes and bundles, ensuring protection against damage during transit and storage-even for international shipping.Q: How do I specify custom sizes or lengths for my order?
A: You can order S32750 round bars in standard or custom diameters (6 mm to 400 mm) and lengths (100 mm to 6000 mm). Just inform the supplier of your exact dimensional and tolerance requirements, and they will accommodate your needs.Tell us about your requirement
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