Alloy 20 Flanges
Alloy 20 Flanges
High-quality Alloy 20 Flanges manufactured for secure, leak-tight pipe connections in pressure piping and process systems.
- Alloy 20
- Weld Neck
- Slip On
- Blind
- Socket Weld
- Threaded
- Lap Joint
- RTJ
Alloy 20 Flanges Manufacturer in India
Sawariya Metal Industries is a manufacturer, supplier, stockist and exporter of Alloy 20 Flanges in different sizes, grades, specifications and finishes for industrial and engineering applications.
Alloy 20 Flanges are forged or machined components used to connect pipes, valves, pumps and equipment, allowing easy assembly, inspection and maintenance of piping systems.
Alloy 20 (UNS N08020) is designed for excellent resistance to sulphuric acid. Alloy 20 (UNS N08020) is a niobium-stabilized nickel-iron-chromium alloy with copper and molybdenum, developed for excellent resistance to sulphuric acid and other aggressive chemical environments.
Typical applications for Alloy 20 Flanges include chemical processing, sulphuric acid plants, pharmaceutical, petrochemical, pickling equipment, food processing, synthetic fibre plants, heat exchangers and general engineering.
Key Features of Alloy 20
Sulphuric Acid Resistance
Developed specifically for sulphuric acid service.
Stress Corrosion Resistance
Good resistance to chloride stress corrosion cracking.
Niobium Stabilized
Reduced risk of carbide precipitation during welding.
Good Fabricability
Suitable for forming, machining and welding.
Alloy 20 Flanges Specifications
| Parameter | Specification |
|---|---|
| Standards | ASTM, ASME Flanges, ANSI Flanges, DIN Flanges, EN Flanges, BS Flanges etc |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc |
| Specifications | ASTM B 564 / ASME SB 564 |
| Grade | Alloy 20 – UNS N08020 |
| Size | 1/2"NB TO 60"NB |
| Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
| Pressure | DIN PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160 |
Equivalent Grades of Alloy 20
| STANDARD | WERKSTOFF NR | UNS | AFNOR | EN |
|---|---|---|---|---|
| Alloy 20 | 2.4660 | N08020 | Z2NCUD31-20AZ | NiCr20CuMo |
Chemical Composition of Alloy 20
| Element | Alloy 20 |
|---|---|
| Ni | 32 – 38 |
| Fe | Bal |
| C | 0.02 max |
| Mn | 1 – 2 |
| Si | 0.7 max |
| Cu | 3 – 4 |
| Cr | 19 – 21 |
| Mo | 2 – 3 |
| S | 0.005 max |
| P | 0.02 max |
| Nb | 0.1 – 0.3 |
Mechanical Properties of Alloy 20
| Element | Alloy 20 |
|---|---|
| Density | 8.1 g/cm3 |
| Melting Point | 1443 °C (2430 °F) |
| Tensile Strength | Psi -80,000, MPa -551 |
| Yield Strength (0.2%Offset) | Psi – 35,000, MPa – 241 |
| Elongation | 30 % |
Types of Alloy 20 Flanges
Weld Neck Flanges
Butt-welded flanges for high-pressure and high-temperature service.
Slip On Flanges
Slip over the pipe for easy alignment and welding.
Blind Flanges
Solid flanges used to close pipe ends and openings.
Socket Weld & Threaded Flanges
Compact connections for smaller bore piping.
Lap Joint Flanges
Used with stub ends for easy alignment.
Spectacle & RTJ Flanges
Positive isolation and high-pressure sealing.
Applications & Industries
- Chemical Processing
- Sulphuric Acid Plants
- Pharmaceutical
- Petrochemical
- Pickling Equipment
- Food Processing
- Synthetic Fibre Plants
- Heat Exchangers
- Process Piping
- Storage Tanks
- Fabrication
- General Engineering
Quality & Inspection
Quality-Focused Manufacturing & Supply
Alloy 20 Flanges can be supplied with inspection, testing and documentation according to the applicable specification and customer purchase requirements.
- Dimensional inspection
- Visual and surface inspection
- Material grade verification
- Chemical composition verification
- Mechanical testing as applicable
- Flange face and bolt-hole inspection
- Non-destructive testing as applicable
- Mill Test Certificate (MTC)
- Third-party inspection support
Why Choose Our Alloy 20 Flanges?
Multiple Pressure Classes
150# to 2500# and PN ratings.
All Flange Types
Weld neck, slip on, blind, socket weld and more.
Accurate Machining
Precise facing and drilling for leak-tight joints.
Custom Flanges
Manufactured as per drawings on request.
Alloy 20 Flanges Manufacturer, Supplier & Exporter
Sawariya Metal Industries supplies Alloy 20 Flanges for domestic and international projects in a wide range of sizes, grades and specifications. Products can be supplied in standard and custom dimensions according to drawings and purchase order requirements.
Every order can be supported with Mill Test Certificates, inspection reports, third-party inspection on request and secure export-worthy packaging.
Share your size, grade, quantity and specification requirements with our team to receive a competitive quotation for Alloy 20 Flanges.
Related Alloy 20 Products Products
Alloy 20 Buttweld Pipe Fittings
Alloy 20 (UNS N08020) is designed for excellent resistance to sulphuric acid.
Alloy 20 Socket weld Pipe Fittings
Alloy 20 (UNS N08020) is designed for excellent resistance to sulphuric acid.
Alloy 20 Valves
Alloy 20 (UNS N08020) is designed for excellent resistance to sulphuric acid.
Technical Note: Technical values should be verified against the applicable ASTM / ASME / EN specification, purchase order requirements and Mill Test Certificate (MTC) for the supplied product.