Stainless Steel 309 Flanges are specially designed flange components known for their excellent resistance to high temperatures, oxidation, and corrosion. These flanges are widely used in industries where equipment is exposed to extreme heat, pressure, and corrosive environments. As an ASME SA182 F309s Flanges Manufacturer in India, we supply a complete range of UNS S30900 and WNR 1.4828 alloy flanges that meet international quality and performance standards.
With years of hands-on industry experience, we understand how critical flange reliability is for piping systems. That is why our Stainless Steel 309 Flanges are manufactured using tested raw materials, precision forging techniques, and strict quality control procedures.
What Are Stainless Steel 309 Flanges?
Stainless Steel 309 is a high-alloy austenitic stainless steel containing high chromium and nickel content, making it ideal for high-temperature applications. Flanges made from this grade retain their strength and corrosion resistance even at temperatures above 1000°C
Common standards and designations include:
- UNS S30900 Forge Flange
- DIN 1.4828 Flanges
- ASME SA182 SS 309 Flanges
Because of these properties, SS 309 Flanges are commonly used in furnaces, heat exchangers, refineries, petrochemical plants, and power generation units.
Key Benefits SS 309 Flanges
- Excellent high-temperature strength
- Outstanding oxidation and scaling resistance
- Good creep resistance
- Strong weldability and formability
- Reliable performance in continuous heat service
Types of Stainless Steel 309 Flanges We Offer
We manufacture and stock a wide variety of Stainless Steel 309 Flanges to meet diverse industrial requirements.
➤ ASTM A182 SS 309 Weldneck Flange
The ASTM A182 SS 309 Weldneck Flange is designed for high-pressure and high- temperature pipelines. Its long tapered hub provides excellent stress distribution, making it ideal for critical services.
➤ SS 309 Slip On Flange
SS 309 Slip On Flange is easy to install and cost-effective for low to medium pressure systems. It is commonly used where frequent inspection or maintenance is required.
➤ 309 SS SORF Flange
The 309 SS SORF Flange (Slip On Raised Face) is widely used in process piping systems due to its simple alignment and good sealing capabilities.
➤ Stainless Steel 309 Blind Flange
A Stainless Steel 309 Blind Flange is used to close pipeline ends or pressure vessel openings. It is ideal for high-temperature isolation and future expansion points.
➤ SS 309 Longweld Neck Flange
The SS 309 Longweld Neck Flange is mainly used in pressure vessels and columns where reinforcement is needed due to extreme thermal conditions.
➤ SS 309 Ring Type Joint – RTJ Flanges
SS 309 Ring Type Joint – RTJ Flanges are designed for very high-pressure and high- temperature services. The metal-to-metal seal ensures leak-proof performance.
➤ SS 309 RTJ Flange
The SS 309 RTJ Flange is commonly used in oil & gas and refinery applications where safety and sealing integrity are critical.
➤ ASME SA182 SS 309 Socketweld Flange
ASME SA182 SS 309 Socketweld Flange is suitable for small-bore, high-pressure piping. It offers strong weld joints and clean internal flow paths.
➤ 309 SS Threaded Flange
A 309 SS Threaded Flange is used where welding is not possible. It is ideal for temporary lines or hazardous environments.
➤ DIN 1.4828 Flat Flange
DIN 1.4828 Flat Flange is widely used in European-standard piping systems and high- temperature furnace equipment.
➤ DIN 1.4828 Lap Joint Flange
The DIN 1.4828 Lap Joint Flange is used with stub ends and allows easy alignment and rotation, making maintenance simpler.
➤ DIN 1.4828 Orifice Flange
DIN 1.4828 Orifice Flange is used to measure flow rate in pipelines and is common in steam and gas applications.
➤ UNS S30900 Square Flange
UNS S30900 Square Flange is mainly used in structural and non-standard piping applications.
➤ UNS S30900 Groove Flange
A UNS S30900 Groove Flange is designed for quick installation and easy disassembly, commonly used in fire protection and utility piping.
➤ 309 SS Reducing Flange
309 SS Reducing Flange is used to connect pipes of different sizes while maintaining high-temperature resistance.
Applications of Stainless Steel 309 Flanges
Based on real industry usage, SS 309 Flanges are widely used in:
- Heat exchangers
- Industrial furnaces and kilns
- Power plants and boilers
- Petrochemical processing units
- Refineries
- Cement plants
- Thermal oxidizers
- Chemical reactors
Their ability to withstand extreme heat and corrosive gases makes them a trusted choice for critical applications.
Mechanical Properties – Stainless Steel 309 Flanges (UNS S30900)
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa min |
| Yield Strength (0.2% Offset) | 205 MPa min |
| Elongation (%) | 40% min |
| Hardness (Brinell) | ≤ 217 HB |
| Impact Strength (Charpy V-notch) | Good at elevated temperatures |
| Modulus of Elasticity | 193 GPa |
| Creep Resistance | Excellent |
| Fatigue Strength | Good |
Chemical Composition – Stainless Steel 309 Flanges (UNS S30900 / DIN 1.4828)
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Chromium (Cr) | 22.0 – 24.0 |
| Nickel (Ni) | 12.0 – 15.0 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Physical Properties – Stainless Steel 309 Flanges
| Physical Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting Point | 1399 – 1454°C |
| Thermal Conductivity | 14.2 W/m·K (at 100°C) |
| Specific Heat Capacity | 500 J/kg·K |
| Coefficient of Thermal Expansion | 15.5 µm/m·°C (20–100°C) |
| Magnetic Permeability | Non-magnetic (annealed) |
| Thermal Stability | Excellent at high temperatures |
Manufacturing Standards and Specifications
Our ASME SA182 F309s Flanges Manufacturer in India operations follow globally accepted standards:
- ASTM A182 / ASME SA182
- DIN EN 10088 (1.4828)
- ASME B16.5 / B16.47
- EN, BS, IS standards
Each UNS S30900 Forge Flange is manufactured using advanced forging methods to ensure dimensional accuracy and superior mechanical strength.
UNS S30900 and WNR 1.4828 Alloy Supplier and Stockist in India
We are a reliable UNS S30900 and WNR 1.4828 Alloy Supplier and Stockist in India, offering both standard and custom-manufactured flanges. Our inventory includes ready stock for urgent requirements as well as made-to-order solutions for specialized projects.
As an ASME SA182 F309s Flanges Manufacturer in India, we focus on quality, consistency, and performance. Every flange is manufactured using advanced forging techniques and strict quality control procedures.
We are also a trusted UNS S30900 Socket Weld Trader, supplying flanges to domestic and international clients across multiple industries.
ASME SA182 F309s Flanges Manufacturer in India
Stainless Steel 309 Flanges made from UNS S30900 / DIN 1.4828 are an excellent choice for high-temperature and oxidation-resistant applications. Whether you need ASTM A182 SS 309 Weldneck Flange, SS 309 Slip On Flange, SS 309 RTJ Flange, or DIN 1.4828 Orifice Flange, we deliver products that meet performance, safety, and quality expectations.
If you are looking for a trusted ASME SA182 F309s Flanges Manufacturer in India or a dependable UNS S30900 and WNR 1.4828 Alloy Supplier and Stockist in India, we are ready to support your project with proven expertise and reliable products.
Request Your Stainless Steel 309 Flanges
