1.4420 S31655 Stainless Steel Manufacturer and Supplier
Professional Manufacturing by FUSHUN SPECIAL STEEL | High Performance Alloy Solutions
1. Introduction and Applications of 1.4420 S31655
FUSHUN SPECIAL STEEL is a premier manufacturer and exporter specializing in high-grade stainless steels, including the robust 1.4420 (S31655) grade. As a leader in the special steel industry since 1998, we utilize advanced smelting technologies to provide materials that meet rigorous international standards.
Grade 1.4420, often associated with the UNS S31655 designation, is a high-alloy austenitic stainless steel. It is characterized by its distinct chemical composition which typically includes Nitrogen additions to enhance strength and corrosion resistance compared to standard 316 types. This steel is engineered to withstand aggressive environments while maintaining excellent formability and weldability.
Typical Applications
Due to its superior properties, 1.4420 S31655 is widely used in industries requiring durability and resistance to pitting and crevice corrosion. Common applications include:
At FUSHUN SPECIAL STEEL, we ensure that every batch of 1.4420 S31655 produced meets the specific demands of these critical industries.
2. Chemical Composition of 1.4420 S31655
The chemical balance of 1.4420 S31655 is strictly controlled during our smelting process to ensure optimal performance. The addition of Nitrogen is key to its enhanced mechanical properties.
| Grade | C (Carbon) | Si (Silicon) | Mn (Manganese) | P (Phosphorus) | S (Sulfur) | Cr (Chromium) | Ni (Nickel) | Mo (Molybdenum) | N (Nitrogen) |
|---|---|---|---|---|---|---|---|---|---|
| 1.4420 / S31655 | ≤ 0.030% | ≤ 1.00% | ≤ 2.00% | ≤ 0.045% | ≤ 0.015% | 16.5 – 18.5% | 10.5 – 13.5% | 2.0 – 3.0% | 0.12 – 0.22% |
*Note: Compositions may vary slightly based on specific standard requirements (ASTM/EN). Please consult our sales engineers for exact heat analysis.
3. Mechanical Properties
1.4420 S31655 exhibits higher yield strength than conventional austenitic stainless steels due to solid solution strengthening from Nitrogen. Below are typical properties at room temperature.
| Property | Value (Typical) | Unit |
|---|---|---|
| Tensile Strength (Rm) | 600 – 850 | MPa |
| Yield Strength (Rp0.2) | ≥ 290 | MPa |
| Elongation (A5) | ≥ 40 | % |
| Hardness (HB) | ≤ 215 | HB |
4. Heat Treatment of 1.4420 S31655
Proper heat treatment is essential to restore the corrosion resistance and mechanical properties of the steel after hot working. FUSHUN SPECIAL STEEL provides materials in the solution annealed condition unless otherwise specified.
- Solution Annealing: Heat to a temperature range of 1040°C – 1120°C.
- Quenching: Rapid cooling in water or air (depending on section thickness) is required to prevent the precipitation of chromium carbides, ensuring maximum corrosion resistance.
5. Equivalent Grades and Standards
We manufacture 1.4420 S31655 in accordance with major international standards to ensure global compatibility.
| Region / Standard | Grade Designation |
|---|---|
| Europe (EN / DIN) | 1.4420 / X5CrNiMo18-11 |
| USA (ASTM / UNS) | S31655 (Related to Type 316LN variants) |
| Japan (JIS) | SUS 316LN (Equivalent category) |
| China (GB) | 022Cr17Ni12Mo2N |
6. Supply Forms and Dimensions
As a comprehensive manufacturer, FUSHUN SPECIAL STEEL offers 1.4420 S31655 in a variety of shapes and conditions. We are equipped to handle large-scale production for both Hot Rolled and Hot Forged products.
Round Bar
Process: Hot Rolled / Hot Forged
Diameter: 10mm – 800mm
Surface: Black, Peeled, Polished, or Turned
Flat Bar & Block
Process: Hot Rolled / Forged
Thickness: 20mm – 500mm
Width: 200mm – 1200mm
Plate & Sheet
Process: Hot Rolled
Thickness: 3mm – 100mm
Dimensions: Standard or Custom Cut
Wire & Coil
Process: Cold Drawn / Hot Rolled
Diameter: 0.5mm – 20mm
Condition: Annealed, Pickled
Customization: We understand that every project is unique. If you require special dimensions or tight tolerances not listed above, please contact us. We welcome bulk orders and custom inquiries.
7. Why Choose FUSHUN SPECIAL STEEL?
Choosing FUSHUN SPECIAL STEEL means partnering with a manufacturer that controls the entire production lifecycle. Our commitment to quality ensures you receive the best 1.4420 S31655 material available.
Advanced Smelting
We possess state-of-the-art smelting facilities including EAF, LF, VD, and VOD. For high-end requirements, we utilize ESR (Electro-Slag Remelting), VIM (Vacuum Induction Melting), and VAR (Vacuum Arc Remelting) to ensure high purity and superior internal structure of the steel.
In-House Heat Treatment
Quality stability is our priority. We perform all heat treatment processes in-house. This allows us to strictly control mechanical properties and microstructure, ensuring consistent quality across batches and faster delivery times.
Value-Added Processing
To save our customers time and machining costs, we offer extensive cold processing services. We can supply materials that are turned, peeled, milled, or ground to precise tolerances, ready for your immediate production use.
Global Experience
With an industrial presence in over 18 countries and decades of experience since 1998, our technically trained sales engineers provide extensive product knowledge and application support. We are experts in handling large-volume international orders.
Ready to Order 1.4420 S31655?
Contact FUSHUN SPECIAL STEEL today for a competitive quote. We are your reliable manufacturer for special steel, tool steel, and stainless steel.
Email: info@fushunspecialsteel.com | Tel: +86-731-89903933
