Austenitic Stainless Steel Flange
High-Performance Austenitic Stainless Steel Flanges for Demanding Industries
SSM specializes in manufacturing austenitic stainless steel flanges from grades 304, 316, and 316L. Our flanges offer exceptional corrosion resistance, high strength, and excellent formability, making them ideal for chemical processing, oil & gas, marine, and food processing applications.
Austenitic Stainless Steel Flange Specifications
1. Standard Dimensions & Pressure Ratings
| Type | Size Range | Pressure Ratings | Standards |
|---|---|---|---|
| Slip-On (SO) | 1/2" - 60" (DN15 - DN1500) | Class 150 - 2500 (PN6 - PN100) | ASME B16.5, EN 1092-1 |
| Weld Neck (WN) | 1/2" - 60" (DN15 - DN1500) | Class 150 - 2500 (PN6 - PN100) | ASME B16.5, EN 1092-1 |
| Blind (BL) | 1/2" - 60" (DN15 - DN1500) | Class 150 - 2500 (PN6 - PN100) | ASME B16.5, EN 1092-1 |
| Threaded (TH) | 1/2" - 24" (DN15 - DN600) | Class 150 - 900 (PN6 - PN40) | ASME B16.5, BS 4504 |
| Socket Weld (SW) | 1/2" - 4" (DN15 - DN100) | Class 150 - 600 (PN6 - PN25) | ASME B16.5, BS 4504 |
2. Material Properties & Characteristics
| Property | 304 (1.4301) | 316 (1.4401) | 316L (1.4404) |
|---|---|---|---|
| Structure | Austenitic | Austenitic | Austenitic |
| Yield Strength (MPa) | 205 | 205 | 170 |
| Tensile Strength (MPa) | 515 | 515 | 485 |
| Elongation (%) | 40 | 40 | 40 |
| Hardness (HB) | 201 | 217 | 217 |
| Magnetic Permeability | <1.02 | <1.02 | <1.02 |
3. Corrosion Resistance Comparison
| Environment | 304 Performance | 316 Performance | 316L Performance |
|---|---|---|---|
| General Corrosion | Excellent | Excellent | Excellent |
| Pitting Resistance | Good | Excellent | Superior |
| Crevice Corrosion | Fair | Good | Excellent |
| Stress Corrosion Cracking | Fair | Good | Excellent |
| Chloride Resistance | Limited | Good | Superior |
Key Advantages of SSM Austenitic Stainless Steel Flanges
✔ Superior Metallurgical Stability - Maintains properties at high temperatures (up to 800°C)
✔ Excellent Weldability - Low carbon content prevents carbide precipitation
✔ Non-Magnetic Properties - Ideal for sensitive electronic environments
✔ Cryogenic Toughness - Performs well in extreme low temperatures (-196°C)
✔ Hygienic Surface - Easy to clean and sterilize for food/pharma applications
Special Features & Custom Options
Enhanced Surface Finishes:
#4 Brushed Finish
Mirror Polish (Ra ≤ 0.4μm)
Electropolished (for ultra-clean surfaces)
Special Configurations:
RTJ (Ring Type Joint) faces for high-pressure applications
Tongue-and-groove faces for precise alignment
Custom bolt hole patterns
Testing & Certification:
100% PMI (Positive Material Identification)
IGC (Intergranular Corrosion) testing
Ferrite content verification
Third-party inspection available
Industry Applications
Chemical Processing:
Acid storage tanks
Reactor vessels
Chemical transport pipelines
Oil & Gas:
Offshore platforms
Refinery piping
LNG terminals
Food & Beverage:
Brewery equipment
Dairy processing
Pharmaceutical piping
Marine & Coastal:
Seawater desalination
Shipbuilding
Coastal power plants
Why Choose SSM for Austenitic Stainless Steel Flanges?
• In-House Metallurgical Lab for quality assurance
• Advanced CNC Machining for precision tolerances
• Complete Traceability from raw material to finished product
• Global Certifications: PED 2014/68/EU, ASME, API, ISO 9001:2015
• Just-in-Time Manufacturing for urgent requirements
Request Your Custom Quote Today
SSM provides competitive pricing and fast delivery for all austenitic stainless steel flange requirements. Our engineering team can assist with:
Material selection guidance
CAD modeling
Pressure rating calculations
Application-specific recommendations
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