Stainless Steel 304H Flanges are widely used in high-temperature and high-pressure applications where strength, corrosion resistance, and long service life are critical. Designed with a higher carbon content than standard 304 stainless steel, SS 304H flanges offer improved creep resistance and excellent mechanical stability at elevated temperatures. Because of these properties, they are extensively used in refineries, power plants, petrochemical industries, and process piping systems.
As a Stainless Steel 304H Flanges Manufacturer & Supplier in India, we supply premium-quality flanges that comply with international standards such as ASTM A182, ANSI B16.5, DIN, BS10, and other global specifications. Our focus is always on delivering reliable products that perform consistently in demanding industrial environments.
What Are Stainless Steel 304H Flanges?
SS 304H flanges are wrought austenitic stainless steel flanges manufactured from ASTM A182 F304H / SS UNS S30409 material. The “H” grade indicates higher carbon content, which enhances strength and resistance to deformation under prolonged exposure to high temperatures.
These flanges are commonly used to connect pipes, valves, pumps, and other equipment in piping systems. Their excellent weldability, oxidation resistance, and durability make them suitable for both moderate and severe service conditions.
Key Features of Stainless Steel 304H Flanges
Stainless Steel ASTM A182 304H Industrial Flanges are chosen for applications where performance and safety are non-negotiable. Some key benefits include:
- Excellent strength at elevated temperatures
- Superior resistance to oxidation and corrosion
- Good weldability with standard welding techniques
- High durability and long service life
- Smooth surface finish for leak-free connections
- Suitable for high-pressure and thermal cycling applications
Because of these advantages, Wrought Austenitic Stainless Steel 304H Industrial Flanges are trusted across industries worldwide.
Types of SS 304H Flanges We Supply
We manufacture and stock a complete range of Stainless Steel 304H Flanges to meet diverse piping requirements:
➤ SS 304H Slip On (SO) Flanges
SS 304H SO flanges are easy to install and cost-effective. They slide over the pipe and are welded at the top and bottom, making them suitable for low to medium pressure applications.
➤ SS 304H Weld Neck Flanges
SS 304H weld neck flanges are designed for high-pressure and high-temperature services. The long tapered hub provides excellent stress distribution. We are a Global Supplier of SS 304H Weld Neck Flange with consistent quality and dimensional accuracy.
➤ SS 304H Blind Flanges
SS 304H blind flanges are used to close the end of piping systems or pressure vessels. As trusted SS 304H Blind Flanges Dealer in India, we supply blind flanges that ensure complete leak-proof sealing.
➤ SS 304H Flat Face Flanges
SS Grade F304H Flat Flange designs are ideal for applications where even gasket compression is required. These flanges are commonly used with cast iron or soft-material connections.
➤ SS 304H Socket Weld Flanges
SS 1.4301 Socket Weld Flanges are suitable for small-diameter, high-pressure pipelines. They provide strong weld joints and smooth bore flow.
➤ SS 304H Threaded Flanges
We are a reliable SS 304H Threaded Flanges Supplier in Mumbai, India, offering threaded flanges for applications where welding is not possible or not preferred.
➤ ANSI B16.5 SS 304H Orifice Flanges
ANSI B16.5 SS 304H Orifice Flanges are used for flow measurement applications. They are precision-machined to support accurate pressure differential readings.
Applications of Stainless Steel 304H Flanges
Because of their excellent heat resistance and strength, SS S30409 Flanges are widely used in:
- Oil & gas refineries
- Petrochemical plants
- Power generation units
- Heat exchangers and boilers
- Chemical processing industries
- Pulp and paper plants
- Food and pharmaceutical industries
Their ability to perform under high temperature and pressure makes them a preferred choice for critical services.
Mechanical Properties – Stainless Steel 304H Flanges (ASTM A182 F304H)
| Property | Value |
|---|---|
| Tensile Strength | 515 MPa (minimum) |
| Yield Strength (0.2% Offset) | 205 MPa (minimum) |
| Elongation | 40% (minimum) |
| Hardness | 201 HB (maximum) |
| Impact Strength | Good at elevated temperatures |
| Creep Resistance | Excellent (designed for high-temperature service) |
Chemical Composition – Stainless Steel 304H Flanges – ASTM A182 F304H
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 11.0 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Physical Properties – SS 304H / SS UNS S30409 Flanges
| Physical Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1400 – 1450°C |
| Thermal Conductivity | 16.2 W/m·K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity | 0.72 µΩ·m |
| Modulus of Elasticity | 193 GPa |
| Magnetic Property | Non-magnetic (may become slightly magnetic after cold working) |
Standards & Specifications of SS 304H flanges
Our Stainless Steel 304H Flanges – Manufacturer, Supplier range is available in multiple international standards:
- ASTM A182 / ASME SA182 F304H
- ANSI B16.5 Stainless Steel 304H Flanges
- BS10 Table D & Table E Flanges
- DIN Standard Flanges
- SS UNS S30409 Pipe Flanges
- SS F304H Flange
Manufacturing Process & Quality Assurance
We manufacture Stainless Steel 304H Flanges using high-quality raw materials sourced from approved vendors. Each flange goes through controlled forging, machining, heat treatment, and surface finishing processes.
To ensure reliability, every product is tested for:
- Chemical composition verification
- Mechanical strength
- Dimensional accuracy
- Surface finish and visual inspection
This strict quality approach ensures that our ASTM A182 Stainless Steel 304H Flanges Suppliers meet international expectations and real-world operational demands.
Why Choose Our SS 304H Flanges?
As an experienced Stockist of SS 304H Slip On Flanges and other flange types, we understand what industries need: reliability, consistency, and timely delivery.
Here’s what sets us apart:
- Wide stock range for quick dispatch
- Competitive pricing with consistent quality
- Custom sizes and pressure classes available
- Global export capability
- Technical support for material selection
We also offer the Best Price of 304H SS WNRF Flanges Exporter solutions without compromising on quality or standards.
Stainless Steel 304H Flanges Manufacturer & Supplier in India
As a trusted Stainless Steel 304H Flanges Manufacturer & Supplier in India, we are committed to providing high-quality products, technical expertise, and dependable service. Whether you need ASTM A182 304H SS Weld Neck Flanges, 304H SS Slip On Flanges, or SS 304H Blind Flanges, we are ready to support your project with precision- engineered solutions.
For specifications, pricing, or technical assistance, connect with us today and experience dependable stainless steel flange solutions built for performance and durability.
Request Your Stainless Steel 304H Flanges
