Super Duplex Stainless Steel S32750 / F53
Super Duplex stainless steel S32750 provides extremely high strength and superior resistance to pitting, crevice corrosion, and stress corrosion cracking. Its balanced ferritic-austenitic structure delivers excellent mechanical performance in severe environments.
This alloy is commonly used in offshore oil & gas, subsea components, heat exchangers, and pressure-containing equipment where maximum corrosion resistance and strength are required.
Specifications
- UNS: 532750
- ASTM: A182 F53, A276
- EN/DIN: 1.4410
- Structure: Super Duplex
- Condition Supplied: Solution Annealed
Data Tables
Chemical Composition:
| C | Mn | P | S | Si | Cr | Ni | Ti | Mo | N | Cu | Fe | Co | Nb (+Ta) | V | W | Al | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 24 | 6 | 3 | 0.24 | |||||||||||||
| Max | 0.03 | 1.2 | 0.035 | 0.02 | 0.8 | 26 | 8 | 5 | 0.32 | 0.5 | Bal |
Mechanical Properties:
| Material Grade | ASTM Standard | Desgnation(EN /UNS) | Yield Strength (MPa) | Yield Strength (KSI) | Tensile Strength (MPa) | Tensile Strength (KSI) | Elongation (%) | Reduction of Area (%) | Hardness(HRC/HBWMax) | Condition | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Super Duplex F53 | ASTM A276 / A182 / A479 | EN 1.4410(S32750) | 550 | 79.7709 | 750 | 108.7785 | 25 | - | 290 BHN | Solution Annealed | |
| Super Duplex F55 | ASTM A276 / A182 / A479 | EN 1.4501(S32760) | 550 | 79.7709 | 750 | #VALUE! | 25 | 45 | 310 BHN | Solution Annealed |
Physical Properties:
| Material Grade | Density (g/cm³) | Melting Range (°C) | Modulus of Elasticity (GPa) | Thermal Conductivity (W/m·K) | Thermal Expansion (×10⁻⁶ /°C) | Electrical Resistivity (µΩ·m) | Magnetic Behavior |
|---|---|---|---|---|---|---|---|
| Super Duplex S32750 / F53 | 7.8 | 1350–1400 | 200 | 18 | 13 | 0.8 | Partially magnetic |
Key Features
- Very high mechanical strength
- Outstanding resistance to pitting and crevice corrosion
- Excellent resistance to stress corrosion cracking
- High resistance to erosion and corrosion fatigue
- Suitable for extreme service environments
Applications
- Subsea and offshore components
- Oil and gas production equipment
- High-pressure valves and pumps
- Heat exchangers
- Structural components in corrosive environments