1.4362 / Alloy 2304 / S32304 Duplex Stainless Steel
At FUSHUN SPECIAL STEEL, we pride ourselves on being a premier manufacturer of high-performance duplex stainless steels. Among our diverse portfolio, the 1.4362 (Alloy 2304 / S32304) stands out as a lean duplex stainless steel grade. It is designed to provide corrosion resistance similar to 316L austenitic stainless steel but with yield strength that is nearly double.
As a dedicated factory, we control every step of the production process, ensuring that our FUSHUN SPECIAL STEEL products meet the rigorous demands of global industries. We welcome bulk orders and long-term partnerships with downstream distributors and end-users.
1. Introduction and Applications of 1.4362 / Alloy 2304
Alloy 2304 (UNS S32304) is a molybdenum-free duplex stainless steel structure consisting of ferritic and austenitic phases. It offers an excellent combination of high mechanical strength and good corrosion resistance. Its high chromium content (23%) and moderate nickel content (4%) make it a cost-effective alternative to 316L, especially in environments where stress corrosion cracking is a concern.
Key Applications
Used extensively in bridges, rebar for concrete, and structural components requiring high strength and durability against environmental corrosion.
Ideal for bleaching equipment, digesters, and storage tanks due to its resistance to alkaline and acidic solutions.
Utilized in brewery tanks, juice storage, and food processing machinery where hygiene and corrosion resistance are paramount.
Applied in slurry handling systems, feed water heaters, and other equipment subject to abrasion and corrosion.
2. Chemical Composition
The chemical balance of S32304 ensures its dual-phase structure. Below is the typical composition range produced by FUSHUN SPECIAL STEEL.
| Grade | C | Mn | Si | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| S32304 / 1.4362 | ≤ 0.030 | ≤ 2.50 | ≤ 1.00 | ≤ 0.040 | ≤ 0.030 | 21.0 – 24.0 | 3.0 – 5.5 | 0.05 – 0.60 | 0.05 – 0.20 |
3. Mechanical Properties
The following table highlights the superior strength of 1.4362 compared to standard austenitic grades.
| Property | Metric Value | Imperial Value |
|---|---|---|
| Tensile Strength (Rm) | 600 – 820 MPa | 87 – 119 ksi |
| Yield Strength (Rp0.2) | ≥ 400 MPa | ≥ 58 ksi |
| Elongation (A5) | ≥ 25% | ≥ 25% |
| Hardness (HB) | ≤ 290 HB | – |
4. Heat Treatment
Proper heat treatment is crucial to maintaining the balanced duplex microstructure.
- Solution Annealing: The material should be heated to a temperature range of 950°C – 1050°C (1742°F – 1922°F).
- Cooling: Rapid cooling (water quenching) is essential immediately after annealing to prevent the formation of detrimental phases such as sigma phase.
5. Equivalent Grades and Standards
| Region / Standard | Grade Designation |
|---|---|
| USA (ASTM/UNS) | S32304 / Alloy 2304 |
| Europe (EN/DIN) | 1.4362 / X2CrNiN23-4 |
| China (GB) | 022Cr23Ni4MoCuN |
| Japan (JIS) | SUS 32304 |
6. Supply Forms and Dimensions
As a comprehensive manufacturer, FUSHUN SPECIAL STEEL offers flexible production capabilities. We can produce both Hot Rolled and Hot Forged materials tailored to your project needs.
Round Bar
Diameter: 16mm – 600mm
Finish: Black, Peeled, Polished, or Turned.
Flat Bar & Plate
Thickness: 10mm – 200mm
Width: Up to 800mm (Forged/Rolled).
Wire Rod
Diameter: 5.5mm – 20mm
Condition: Coil or Cut-to-length.
Custom Sizes
We specialize in non-standard sizes. If you have specific dimensional requirements, please contact us for a custom solution.
We are the manufacturer. For large-scale projects and bulk orders, please visit FUSHUN SPECIAL STEEL to consult with our technical team.
7. Why Choose FUSHUN SPECIAL STEEL?
Advanced Smelting Technology
We utilize premium smelting processes including Electric Slag Remelting (ESR), Vacuum Induction Melting (VIM), and Vacuum Arc Remelting (VAR). This ensures high purity, low inclusion levels, and superior performance for our high-end steel grades.
Integrated Heat Treatment
Our in-house heat treatment facilities allow us to precisely control the mechanical properties of the steel. This guarantees stable quality and faster delivery times compared to suppliers who outsource this critical step.
Machining Services
We provide value-added services such as turning (peeling) and grinding. By delivering pre-machined material, we save our downstream customers significant time and machining costs.
Direct Manufacturer
Dealing directly with FUSHUN SPECIAL STEEL means no middlemen. We welcome large quantity orders and can offer competitive factory-direct pricing.
Ready to order high-quality 1.4362 / Alloy 2304?
Contact FUSHUN SPECIAL STEEL today for a quote. We are your trusted partner for premium special steel solutions.
