Duplex Stainless Steel 2404 Round Bar
➡️ Duplex 2404 | UNS S82441 | EN 1.4662 | X2CrNiMnMoCuN24-4-3-2 | ASTM A276
➡️ ASTM, EN, JIS & International Standards
➡️ Supply Conditions
➡️ Multiple Diameters & Supply Lengths
➡️ Global Export & International Delivery
Country of Origin:
Europe, Japan, USA
Material Type:
Stainless Steel
UNS Number:
S82441
Wr. No.:
1.4662
MTC Available:
EN 10204 3.1
Product Description for Duplex Stainless Steel 2404 Round Bar
Duplex Stainless Steel 2404 Round Bar is a high-strength lean duplex bar made to UNS S82441, known in Europe as 1.4662 (X2CrNiMnMoCuN24-4-3-2). It contains about 23–25% chromium, 3.0–4.5% nickel, 2.5–4.0% manganese, 1.0–2.0% molybdenum and 0.20–0.30% nitrogen.
The grade was developed to give corrosion resistance close to that of 2205 duplex in many environments while using less nickel and molybdenum. Its pitting resistance equivalent is usually around 33–34, which is higher than 316L and 2304.
Strength is a major advantage. The yield strength of annealed 2404 is higher than that of 2304 and 2205, which allows weight savings in structural and pressure parts. The duplex structure also gives good resistance to chloride stress corrosion cracking.
Duplex 2404 bar is certified as UNS S82441 to ASTM A479 or as 1.4662 to EN 10088-3, solution annealed. Most 2404 bar is hot rolled or forged, then peeled or turned to remove surface scale. The grade is magnetic and cannot be hardened by heat treatment. Welding is carried out with duplex filler metals and controlled heat input.
Common uses include shafts, rebar and structural parts, bolts and fasteners, pump and valve parts, water and desalination equipment, pulp and paper parts, and storage tank components. It is a cost-effective choice where 316L is not strong or corrosion resistant enough, and full 2205 is more than needed. Availability in bar form is narrower than for 2205, so buyers should check sizes early. It is also a good choice for shafts and fasteners where strength and corrosion resistance are both needed. Shipbuilders and offshore fabricators use 2404 for shafts, pump parts and fixings where they want 2205-type corrosion resistance with a lower alloy surcharge.
Common Applications of Duplex Stainless Steel 2404 Round Bar
➡️ Machined shafts, spindles, valve stems, pump sleeves and pins for food, beverage, dairy and pharmaceutical equipment, where the passive chromium oxide film resists both product acids and caustic clean-in-place chemicals.
➡️ Fasteners, studs, bolts, threaded rod and anchor components produced from bar stock, chosen for corrosion resistance combined with the ductility needed for cold heading and thread rolling.
➡️ Chemical, water treatment and general process plant parts such as agitator shafts, flange blanks, nozzles and support components handling water, steam and mildly corrosive media free of significant chlorides.
➡️ Architectural and structural hardware including handrail stanchions, balustrade fittings, tension rods and bollards, where a bright ground or polished bar finish provides both appearance and low maintenance.
International Equivalent Grade for Duplex 2404 Round Bar
Standard
Country / Region
Grade
UNS
USA
UNS S82441
ASTM
USA
ASTM A276 / ASTM A479
EN 10088-3 / DIN
Europe
1.4662 (X2CrNiMnMoCuN24-4-3-2)
BS EN 10088-3
United Kingdom
1.4662 (X2CrNiMnMoCuN24-4-3-2)
Technical Specification for Duplex Stainless Steel 2404 Round Bar
Specification
Value
Unit
Material
Stainless steel (duplex)
-
Grade
2404 / UNS S82441 / 1.4662
-
Standard
ASTM A479 / A479M, EN 10088-3
-
Product Form
Round bar
-
Diameter (supply range)
10–300
mm
Length (random)
3–6
m
Manufacturing Process
Hot rolled or forged, then solution annealed
-
Surface Finish
Pickled, peeled, turned, centreless ground or polished
-
Heat Treatment / Delivery Condition
Solution annealed and rapidly cooled
-
Tolerance Standard
ASTM A484 / EN 10060 / EN 10278
-
Density
7.8
g/cm³
Thermal Conductivity at 20°C
15
W/m·K
Coefficient of Thermal Expansion 20–100°C
13.0
µm/m·K
Specific Heat at 20°C
500
J/kg·K
Electrical Resistivity at 20°C
0.80
µΩ·m
Modulus of Elasticity at 20°C
200
GPa
Magnetic Properties
Magnetic (duplex ferrite-austenite structure)
-
Testing / Inspection
Chemical analysis, tensile, hardness, ferrite content, optional ASTM A923 / impact / UT / PMI
-
Certification
EN 10204 3.1 (3.2 on request), NACE MR0175 / ISO 15156 where specified
-
Technical Specifications
Get the key technical specifications for Duplex Stainless Steel 2404 Round Bar
Duplex 2404 Round Bar is supplied to ASTM A479 / A479M with general requirements from ASTM A484, or to EN 10088-3 as 1.4662 in the solution-annealed condition. Because the grade is newer than 2205, buyers should confirm the edition of the standard and the available size range with the mill.
Bars are hot rolled or forged and then solution annealed, usually at about 1000–1100°C, followed by rapid cooling. This gives a balanced ferrite-austenite structure. Like other duplex grades, 2404 is not hardened by heat treatment, and its high strength comes from nitrogen and a fine two-phase structure.
Long exposure in the range of about 300–950°C can form brittle phases and reduce corrosion resistance. Tests such as ASTM A923, ferrite measurement and impact testing can be ordered to confirm correct heat treatment.
Physical values for 2404 are reference data taken from producer literature. The material is magnetic. Standard inspection includes heat analysis, tensile, hardness and dimensional checks. For offshore orders, ultrasonic testing, PMI and third-party witnessing of 2404 bar can be arranged. For 2404, size tolerances follow ASTM A484, EN 10060 or EN 10278, depending on finish and standard.
Duplex 2404 is a newer grade, so buyers should confirm that the design code or client specification accepts UNS S82441 before ordering. Bars are solution annealed at about 1020–1100°C and water quenched. For offshore or pressure service, specify ferrite content and Charpy impact tests, and ask for UT on larger diameters.
Chemical Composition for Duplex Stainless Steel 2404 Round Bar
Element
Symbol
Min
Max
Unit
Carbon
C
-
0.030
%
Manganese
Mn
2.50
4.00
%
Silicon
Si
-
0.70
%
Phosphorus
P
-
0.035
%
Sulfur
S
-
0.005
%
Chromium
Cr
23.0
25.0
%
Nickel
Ni
3.0
4.5
%
Molybdenum
Mo
1.00
2.00
%
Nitrogen
N
0.20
0.30
%
Copper
Cu
0.10
0.80
%
Chemical Composition
View the chemical composition and applicable material limits for Duplex 2404 Round Bar
The table shows the ASTM limits for UNS S82441. The EN grade 1.4662 has closely matching limits in EN 10088-3.
Chromium at 23–25% and molybdenum at 1.0–2.0% provide the main corrosion resistance. Nitrogen at 0.20–0.30% adds strongly to pitting resistance and to strength. Together these give a PREN of about 33–34, close to 2205 and well above 316L and 2304.
Manganese at 2.5–4.0% and nickel at 3.0–4.5% stabilise the austenite phase. Manganese also raises nitrogen solubility, which allows the high nitrogen level. Using manganese this way reduces the need for costly nickel.
Carbon is held at 0.030% maximum to prevent carbide precipitation. Sulfur is kept very low, at 0.005% maximum, to help hot workability and pitting resistance. Copper adds some resistance in reducing acids. On 2404 certificates, confirm that nitrogen, molybdenum and copper are all within range. The low sulfur limit of 0.005% helps hot workability and pitting resistance. When comparing mill certificates, check nitrogen and molybdenum together, because both drive the PREN.
Manganese at 2.5–4.0% also raises nitrogen solubility, which lets the steel hold enough nitrogen for its high strength. Nickel at 3.0–4.5% is lower than in 2205, which is where the cost saving comes from.
Mechanical Properties for Duplex Stainless Steel 2404 Round Bar
Mechanical Property
Value
Unit
Tensile Strength, under 11 mm (ASTM A479, annealed)
≥ 740
MPa
Yield Strength 0.2%, under 11 mm (ASTM A479, annealed)
≥ 540
MPa
Tensile Strength, 11 mm and over (ASTM A479, annealed)
≥ 680
MPa
Yield Strength 0.2%, 11 mm and over (ASTM A479, annealed)
≥ 480
MPa
Elongation in 50 mm (ASTM A479)
≥ 25
%
Hardness (ASTM reference)
≤ 290
HB
Mechanical Properties
Check the key mechanical properties and performance requirements of Duplex 2404 Round Bar
The values shown are minimum requirements for UNS S82441 bars in the solution-annealed condition. Requirements can vary with section size and edition of the standard, so the ordered standard should always be checked. EN 10088-3 gives its own limits for 1.4662.
The yield strength of at least 480 MPa is among the highest of the lean duplex grades and is well above that of 316L. This allows lighter parts and higher design stresses. Ductility remains good, with elongation of at least 25%.
Toughness is good at room temperature and moderately low temperatures when the bar is correctly solution annealed. The grade is not meant for cryogenic use. For critical service, impact tests can be added. Use minimum standard values for design and confirm actual results on the mill certificate. ASTM A479 sets higher minimums for bars under 11 mm, because thin sections cool faster and keep a finer structure. Make sure the certificate matches the right size band. For shafts, the high yield strength allows smaller diameters than 2205 at the same load, but check fatigue and deflection limits.
Hardness is limited to 290 HB maximum in ASTM A479, which also helps meet sour-service hardness rules where they apply.
Dimension / Sizes for Duplex Stainless Steel 2404 Round Bar
Dimension / Size
Value
Unit
Available Diameter Range (supply capability)
10–250 (check stock availability)
mm
Standard Length (random)
3–6
m
Custom / Cut-to-Length
Available on request
-
Diameter Tolerance
Per ASTM A484 / A484M (hot-finished or cold-finished class) or EN 10060 / EN 10278 h9-h11
-
Length Tolerance
Per ordered standard or as agreed (commonly +50 / -0 mm for cut lengths)
-
Straightness Tolerance
Per ASTM A484 / EN 10060 or as agreed
-
End Condition
Saw cut square, chamfered or as ordered
-
Surface Finish
Pickled, peeled, turned, centreless ground or polished
-
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for Duplex 2404 Round Bar
Pricing for Duplex Stainless Steel 2404 Round Bar
Round Bar Prices are generally quoted per kilograms or meters tonnes and can fluctuate with the global raw material and market prices. The final price will depend on a variety of factors, including the grade size, diameter, length, surface finish, the quantity and whether the bars are cut to length or in standard lengths.
For smaller quantities, we can also quote per metre or per piece basis once the required dimensions have been confirmed. Container-loads or orders that are larger in size are typically priced per tonne, based upon the specifications required and the supply conditions.
Please provide your desired dimensions, grades, length number, and end for a current quote including the lead time applicable and details for certification.
Pricing
Get current Duplex Stainless Steel 2404 Round Bar pricing based on size, quantity, grade, finish, and delivery requirements.
Why Choose Us
Euro Steel Bars is an international distributor, stockist and exporter of stainless round steel bars that cover carbon, stainless alloy, special grades. We stock a variety of sizes and grades. We guarantee every order with mill test certificates as well as full quality-assurance documentation. Our name speaks to our roots: European-sourced materials that is backed by the certificates and rigor that buyers from Asia as well as the Gulf and Africa are looking for.
Each bar we deliver is accompanied by EN 10204 3.1 mill test certificates as well as complete documentation of quality, so what you receive corresponds to what’s written in the documents. We carry a selection of sizes and grades ready for transport, and cut length upon the request of customers, which results in quicker lead times, whether you’re ordering just a one-off spec or a complete project tonnage.
We operate an actual wholesale business that is that is supported with an internationally-operated supply chain therefore we are able to serve fabricators sourcing one grade the same way in the same way as an EPC contractor who is placing a large order. Our clients include manufacturers, fabricators EPC construction companies, engineers oil and gas projects as well as construction companies. we design our inventory as well as documentation to show what buyers need to bring projects forward.
Our customers trust us across Qatar, Oman, Bahrain, Kuwait, Jordan, Malaysia, Singapore, Thailand, Taiwan, Turkey, Italy and South Africa. If you’re looking to source an Gulf energy project, or a construction project within Southeast Asia, you get the same quality of certified material, the exact documentation, and the exact delivery procedure.
Frequently Asked Questions
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