Stainless Steel 304 Flanges: Unmatched Versatility and Performance
At ASC LLP, we take pride in offering a wide range of high-quality steel products, and our 304 stainless steel flanges are no exception. Renowned for their exceptional properties and versatility, these flanges are integral to numerous industries worldwide. In this comprehensive guide, we’ll explore what is 304 stainless steel flanges, their properties, and advantages, and why they are the preferred choice for many applications.
What is 304 Stainless Steel Flanges?
304 stainless steel flanges are a type of flange made from 304-grade SS, which is the most commonly used stainless steel alloy in the world. This material is austenitic stainless steel containing 18% chromium and 8% nickel, which provides excellent corrosion resistance and strength. The flanges are used to connect pipes, valves, pumps, and other equipment in a piping system, ensuring a secure and leak-proof connection.

Flanges 304 Stainless Steel Properties
The popularity of stainless steel flanges 304 can be attributed to the outstanding properties of 304 stainless steel. Here are some key characteristics:
- Corrosion Resistance: One of the most significant properties of 304 SS flanges is their exceptional resistance to corrosion. The presence of chromium forms a passive layer of chromium oxide on the surface, which protects the material from rust and corrosion, even in harsh environments.
- High Strength: 304 SS flanges offer excellent mechanical properties, including high tensile strength, which makes them suitable for high-pressure applications. They maintain their strength at both cryogenic and elevated temperatures.
- Heat Resistance: These flanges can withstand high temperatures up to 870°C (1600°F), making them ideal for applications that involve heat and thermal cycling.
- Formability and Weldability: 304 SS flanges are easily formable and weldable. They can be shaped into various flange types, including slip-on, weld neck, and blind flanges, without compromising their structural integrity.
- Hygienic: The smooth, non-porous surface of 304 grade SS flanges makes them easy to clean, which is crucial for industries like food processing and pharmaceuticals, where hygiene is paramount.
Advantages of 304 Stainless Steel Flanges
Choosing 304 SS flanges comes with several advantages that contribute to their widespread use across different sectors:
- Versatility: The versatility of stainless steel 304 flanges is unmatched. They are used in a variety of industries, including oil and gas, petrochemicals, water treatment, food processing, and more. Their adaptability to different environments and applications makes them a go-to choice for engineers and designers.
- Cost-Effective: Despite their superior properties, 304 SS flanges are relatively affordable compared to other stainless steel grades. This makes them an economical choice for projects that require both quality and cost-efficiency.
- Durability: The combination of corrosion resistance, strength, and heat resistance ensures that 304 stainless steel flanges have a long service life. This durability reduces the need for frequent replacements, thereby lowering maintenance costs.
- Aesthetic Appeal: The bright, polished surface of 304 SS flanges adds an aesthetic appeal to any installation. This is particularly important in applications where the appearance of the equipment is as crucial as its functionality.
- Availability: As the most widely used stainless steel grade, 304 stainless steel flanges are readily available in various sizes, shapes, and specifications. This availability ensures that project timelines are not delayed due to supply chain issues.


Schedule and Size Chart for Stainless Steel 304 Flanges
Schedule | Nominal Pipe Size (NPS) | Flange OD (mm) | Bolt Circle Diameter (mm) | Number of Bolts | Bolt Diameter (mm) | Thickness (mm) |
SCH 10 | 1/2″ – 24″ | 88.9 – 762 | 60.3 – 673.1 | 4 – 16 | 15.9 – 31.8 | 6.4 – 19.1 |
SCH 40 | 1/2″ – 24″ | 88.9 – 762 | 60.3 – 673.1 | 4 – 16 | 15.9 – 31.8 | 6.4 – 22.2 |
SCH 80 | 1/2″ – 24″ | 88.9 – 762 | 60.3 – 673.1 | 4 – 16 | 15.9 – 31.8 | 7.1 – 24.1 |
SCH 160 | 1/2″ – 24″ | 88.9 – 762 | 60.3 – 673.1 | 4 – 16 | 15.9 – 31.8 | 7.1 – 30.2 |
Mechanical Properties Chart
Property | Value | Units |
Tensile Strength, Ultimate | 515 – 750 | MPa |
Tensile Strength, Yield | 205 | MPa |
Modulus of Elasticity | 193 – 200 | GPa |
Elongation at Break | 70 | % |
Hardness, Rockwell B | 70 – 90 | – |
Specifications Chart
Standard | Specification |
ASTM | ASTM A182 / A240 |
ASME | ASME SA182 / SA240 |
ANSI | ANSI B16.5 |
DIN | DIN 2576, DIN 2631, DIN 2632 |
EN | EN 1092-1 |
Chemical Composition Chart
Element | Composition (%) |
Carbon (C) | ≤ 0.08 |
Manganese (Mn) | ≤ 2.00 |
Silicon (Si) | ≤ 1.00 |
Phosphorus (P) | ≤ 0.045 |
Sulfur (S) | ≤ 0.030 |
Chromium (Cr) | 18.00 – 20.00 |
Nickel (Ni) | 8.00 – 10.50 |
Nitrogen (N) | ≤ 0.10 |
Iron (Fe) | Balance |
Physical Properties Chart
Property | Value | Units |
Density | 8.00 | g/cm³ |
Melting Point | 1400 – 1450 | °C |
Thermal Conductivity | 16.2 | W/m·K |
Electrical Resistivity | 0.072 | Ω·mm²/m |
Specific Heat Capacity | 500 | J/kg·K |
Application Chart
Industry | Applications |
Oil and Gas | Pipeline connections, valves, pumps, and pressure vessels |
Chemical Processing | Corrosive chemical transport systems, reaction vessels |
Food and Beverage | Hygienic piping systems, food processing equipment |
Water Treatment | Desalination plants, potable water systems |
Pharmaceutical | Sterile piping systems, bioreactors, clean room equipment |
Petrochemical | Refinery piping systems, heat exchangers |
Marine | Seawater cooling systems, shipbuilding, marine engineering |
Why Choose ASC LLP for 304 Stainless Steel Flanges?
At ASC LLP, we are committed to providing our customers with the highest quality steel products, including 304 stainless steel flanges. Here’s why you should choose us:
- Extensive Inventory: We maintain a large inventory of stainless steel flanges 304 in various sizes and specifications, ensuring that we can meet the needs of any project, big or small.
- Quality Assurance: Our flanges undergo rigorous quality checks to ensure they meet international standards. We are dedicated to delivering products that meet the highest levels of performance and reliability.
- Competitive Pricing: We offer 304 SS flanges at competitive prices without compromising on quality. Our efficient supply chain management allows us to pass on cost savings to our customers.
- Expertise: With years of experience in the steel industry, our team of experts is always available to provide technical support and guidance. We work closely with our clients to understand their specific requirements and deliver tailored solutions.
- Global Reach: As a leading supplier of steel products, ASC LLP serves customers around the world. Our global network ensures timely delivery and consistent product availability.
304 SS flanges are a cornerstone of many industrial applications due to their exceptional properties, versatility, and cost-effectiveness. At ASC LLP, we are proud to offer these high-quality flanges to our customers. Whether you’re in the oil and gas industry, food processing, or any other sector, you can rely on our 304 grade stainless steel flanges to deliver performance and reliability.
Global Reach
Amardeep Steel Centre boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality Stainless Steel 304 Flanges. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.

Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.