Uns S32750 Sheet
UNS S32750 sheet is a super duplex stainless steel material with outstanding strength and excellent corrosion resistance. Its high chromium, molybdenum, and nitrogen content make it highly resistant to chloride and seawater corrosion.
Because of its superior mechanical and corrosion-resistant properties, UNS S32750 is widely used in oil and gas, marine engineering, chemical processing, and high-performance industrial systems where standard stainless steels are not sufficient.
- Description
UNS S32750 sheet is a super duplex stainless steel material with very high strength and excellent corrosion resistance. It is commonly known as 2507 super duplex stainless steel and is widely used in harsh industrial environments where ordinary stainless steels cannot provide sufficient performance.
The microstructure of UNS S32750 combines:
- Austenitic stainless steel characteristics
- Ferritic stainless steel characteristics
This dual-phase structure gives the material both high mechanical strength and strong corrosion resistance.
Chemical Composition of UNS S32750
UNS S32750 contains high levels of chromium, molybdenum, and nitrogen, which significantly improve corrosion resistance.
| Element | Content (%) | Function |
|---|---|---|
| Chromium (Cr) | 24.0 – 26.0 | Improves corrosion resistance |
| Nickel (Ni) | 6.0 – 8.0 | Enhances toughness and stability |
| Molybdenum (Mo) | 3.0 – 5.0 | Improves pitting resistance |
| Nitrogen (N) | 0.24 – 0.32 | Increases strength and corrosion resistance |
| Carbon (C) | ≤ 0.03 | Improves weldability |
| Iron (Fe) | Balance | Base metal |
Mechanical Properties of UNS S32750 Sheet
UNS S32750 has much higher strength than standard stainless steel grades such as 304 or 316.
| Property | Performance |
|---|---|
| Tensile strength | Very high |
| Yield strength | Approximately twice that of 316 stainless steel |
| Hardness | High |
| Impact toughness | Good |
| Fatigue resistance | Excellent |
The material is especially suitable for high-pressure and heavy-load environments.
Corrosion Resistance Performance
One of the main advantages of UNS S32750 is its outstanding corrosion resistance.
Excellent Resistance To:
- Chloride corrosion
- Pitting corrosion
- Crevice corrosion
- Stress corrosion cracking
- Seawater corrosion
This makes it suitable for marine and chemical industries.
Key Features of UNS S32750 Sheet
1. High Strength
Super duplex structure provides:
- High load-bearing capability
- Reduced material thickness possibility
- Better structural efficiency
2. Excellent Corrosion Resistance
The high chromium and molybdenum content significantly improves corrosion resistance in aggressive environments.
3. Good Weldability
Although it is a high-alloy material, UNS S32750 can still be welded using appropriate procedures.
4. Long Service Life
The material performs well in:
- Humid environments
- Chemical exposure
- Marine conditions
- High-pressure systems
Common Applications of UNS S32750 Sheet
UNS S32750 sheets are widely used in industries requiring high strength and corrosion resistance.
Oil and Gas Industry
- Offshore platforms
- Subsea equipment
- Heat exchangers
- Pressure vessels
- Pipeline systems
Chemical Processing Industry
- Chemical storage tanks
- Processing equipment
- Corrosion-resistant reactors
- Industrial piping systems
Marine Engineering
- Seawater desalination equipment
- Shipbuilding components
- Marine structural systems
- Saltwater handling equipment
Energy Industry
- Power plant systems
- Flue gas desulfurization equipment
- High-pressure industrial systems
Structural and Industrial Applications
- Heavy-duty structural panels
- High-strength industrial components
- Aggressive environment fabrication systems
Comparison With 316 Stainless Steel
| Item | UNS S32750 | 316 Stainless Steel |
|---|---|---|
| Strength | Very high | Medium |
| Corrosion resistance | Excellent | Good |
| Chloride resistance | Excellent | Moderate |
| Cost | Higher | Lower |
| Marine performance | Superior | Standard |
UNS S32750 is generally selected for more demanding environments than 316 stainless steel.
Common Sheet Specifications
| Thickness Range | Common Applications |
|---|---|
| 0.5 – 3 mm | Precision and chemical equipment |
| 3 – 10 mm | Structural and industrial systems |
| 10 mm+ | Heavy-duty pressure applications |
Custom sizes and processing are commonly available.
