Super Duplex Steel Bars

Super duplex stainless steel bars are solid, high-alloy metal products built from a dual-phase microstructure roughly 50% ferritic and 50% austenitic. The primary grades are UNS S32750 (2507) and UNS S32760, with chromium content at 24–26%, molybdenum at 3–4%, and nitrogen up to 0.32%. This composition provides super duplex bars with a PREN (Pitting Resistance Equivalent Number) above 40, placing them well above standard duplex grades in corrosion performance. Minimum yield strength reaches 550 MPa, nearly 25% higher than conventional duplex grades. Oil and gas, chemical processing, desalination, and marine engineering are the key industries that rely on super duplex bar most heavily, where a combination of structural load and aggressive corrosive media eliminates lower-grade materials as viable options.

Super Duplex Stainless Steel Bar Price

Super Duplex Stainless Steel bar prices depend on the grade, shape, size accuracy, and order. quantity. Here are the key cost factors to help you plan your budget.

Approximate Price Range

Super duplex stainless steel bars are priced between Rs. 650 and Rs. 1,000 per kg for standard grades and profiles. Final pricing varies by grade; S32750 and S32760 carry a premium over standard duplex due to higher molybdenum and nickel content.

Factors Affecting Price

Grade and alloy content: S32750 and S32760 are more expensive than 2205 due to the alloy's high chromium, nickel, and molybdenum content. Each percentage point of molybdenum increases the cost of raw material.

Size and profile: Larger cross-section products require more material per metre, this increasing per-piece weight and cost. Hex and flat bars may have slightly different rates than round bars due to additional production stages.

Manufacturing finish: Cold-drawn and ground bars carry a higher price than hot-rolled options. Tighter dimensional tolerances require additional machining, which is reflected in the cost.

Order volume and market conditions: Base rates correspond to global nickel, chromium, and molybdenum commodity prices. Always confirm the current pricing per kg of super duplex stainless steel bars before placing bulk purchases, as rates fluctuate with market cycles.

Super Duplex Stainless Steel Bar Grades

The super duplex bar grades are selected based on their operating environment, chloride concentration, temperature, and mechanical load requirements. The five main grades are listed below.

Super Duplex Stainless Steel S32750 Bars
Super Duplex Stainless Steel S32760 Bars
Super Duplex Stainless Steel 2507 Bars
Super Duplex Stainless Steel Ferralium 255 Bars
Super Duplex Stainless Steel Zeron 100 Bars

Types Of Super Duplex Stainless Steel Bar

Super duplex stainless steel bars are available in 4 standard profiles, each suited to specific load types, fabrication methods, and dimensional requirements.

Round Bars
Square Bars
Hex Bars
Flat Bars

Super Duplex Stainless Steel Bar Specifications

The table below covers the governing standards, material grades, dimensional parameters, and available finish conditions for super duplex bar procurement and engineering reference.

Category	Parameter	Specification details
General	Material grades	UNS S32750 (2507), UNS S32760 (F55)
General	Standards	ASTM A276, ASTM A479, ASME SA 479
General	Density	7.8 g/cm³
General	Supply condition	Annealed, H&T, or Cold-worked
Finish	Cold drawn & polished	Sizes: 3.00 – 75.00 mm (Tolerance: h8 – h11)
Finish	Cold drawn & ground	Sizes: 10.00 – 75.00 mm (Tolerance: h8 – h11)
Finish	Peeled & polished	Sizes: 40.00 – 150.00 mm (Tolerance: h11, DIN 1013)
Finish	Peeled & ground	Sizes: 20.00 – 50.00 mm (Tolerance: h9 – h11)

Super Duplex Stainless Steel Bar Size Chart

Super duplex stainless steel bars are stocked across a broad dimensional range covering all standard profiles, with lengths typically from 3,000 mm to 6,000 mm and custom forged lengths available on request.

Profile	Standard size range
Round bar	3 mm – 800 mm (Diameter)
Hex bar	2 mm – 100 mm (Across flats)
Square bar	4 mm – 100 mm
Flat bar	Thickness: 2 mm – 150 mm; Width: 10 mm – 500 mm
Rectangular bar	33 x 30 mm – 295 x 1066 mm
Hollow bar	32 mm OD x 16 mm ID – 250 mm OD x 200 mm ID

Key Features Of Super Duplex Stainless Steel Bar

Super duplex bars offer 10 performance characteristics that standard austenitic or conventional duplex grades cannot match under combined mechanical stress and corrosive operating conditions.

Superior corrosion resistance
High strength
Durability in extreme conditions
Reduced maintenance costs
Versatile applications
Enhanced safety
Cost efficiency
Improved performance in high-stress applications
Compatibility with standard fabrication techniques
Sustainability

Applications Of Super Duplex Stainless Steel Bar

Super duplex stainless steel bars are used across 9 key sectors where carbon steel or standard austenitic grades fail due to corrosion, high mechanical loads, or aggressive operating media.

Oil and gas industry
Chemical processing
Desalination plants
Marine engineering
Heat exchangers
Pulp and paper industry
Water treatment plants
Power generation
Structural applications

How To Choose The Right Super Duplex Stainless Steel Bar Supplier And Manufacturer?

Selecting the right super duplex bar supplier directly affects material quality, delivery time, and project cost. Evaluate vendors on the 4 criteria below before issuing any purchase order.

Selecting The Right Supplier And Manufacturer:

Confirm the manufacturer supplies super duplex stainless steel bars in the exact grade, profile, and size required. Not every facility stocks all super duplex variants or handles custom bar lengths. Verify production capabilities and available stock before sending an RFQ. We at Metline Industries maintain ready stock across S32750 and S32760 in multiple profiles.

Technical Considerations:

Make sure the grade matches the specified service conditions. Use S32750 for regular high-chloride applications and S32760 or Zeron 100 for difficult situations. Request a Material Test Certificate (MTC), which will verify the chemical composition and mechanical properties. The bars should conform to ASTM A276 or A479 standards as appropriate. Custom sizes often need 6- to 10-week wait times; verify stock availability early.

Evaluating Supplier Credibility:

A reliable super duplex bar supplier holds ISO 9001 certification at a minimum. Each batch must carry a heat number traceable to the originating mill. This traceability is essential for quality audits and documentation requirements in regulated industries such as oil and gas and nuclear power.

Procurement Strategy:

Send a clear RFQ that includes the UNS number, profile type, size, finish, governing standard, and order quantity. Evaluate at least three supplier proposals based on pricing, lead time, MTC availability, and minimum order quantities. For bulk orders, plan a pre-dispatch inspection (PDI) or third-party inspection (TPI) at the manufacturing facility.