ASTM A694 F42 Carbon Steel Flanges: Superior Strength for High-Pressure Applications
In the world of industrial applications, the choice of materials can make a significant difference in performance, durability, and safety. One such material that stands out for its exceptional properties is Inconel 825. At Amardeep Steel Centre LLP, we offer a wide range of Inconel products, including the highly sought-after ASTM B564 825 Inconel Flanges. This article provides a detailed overview of 825 Inconel Flanges, their properties, advantages, and uses in various industrial applications.
What is ASTM B564 825 Inconel Flanges?
ASTM B564 825 Inconel Flanges are made from Inconel 825, a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. This alloy is renowned for its exceptional resistance to various corrosive environments, including those containing sulfuric acid, phosphoric acid, and seawater. The flanges, manufactured as per the ASTM B564 standard, are designed to connect pipes, valves, pumps, and other equipment to form a piping system.
The 825 Inconel Flanges are particularly suitable for high-temperature and high-pressure environments, making them ideal for use in the oil and gas, petrochemical, chemical processing, and marine industries. These flanges are available in different types, including weld neck, slip-on, socket weld, lap joint, threaded, and blind flanges, to cater to specific application requirements.

Properties of ASTM B564 825 Inconel Flanges
The properties of Inconel Flanges ASTM B564 825 make them an excellent choice for challenging environments. Some of the key properties include:
- Corrosion Resistance: ASTM B564 825 Inconel Flanges exhibit excellent resistance to both reducing and oxidizing acids, such as sulfuric and phosphoric acids. They are also resistant to pitting and crevice corrosion in chloride-containing environments, making them suitable for marine and offshore applications.
- High-Temperature Stability: These flanges maintain their mechanical strength and corrosion resistance even at elevated temperatures, ensuring reliable performance in applications that involve extreme heat.
- Good Fabricability: Inconel ASTM B564 825 Flanges can be easily fabricated using standard machining and welding processes. This makes them versatile for a wide range of industrial applications.
- Oxidation Resistance: The high nickel content in Inconel 825 provides excellent resistance to oxidation in both aqueous and gaseous environments, preventing the formation of scales and maintaining surface integrity.
- Mechanical Strength: ASTM B564 825 Inconel Flanges possess high tensile and yield strength, which makes them ideal for high-pressure applications.
- Resistant to Stress Corrosion Cracking: The alloy’s composition provides excellent resistance to stress corrosion cracking, a common issue in harsh and corrosive environments.
Advantages of ASTM B564 825 Inconel Flanges
The use of ASTM B564 825 Inconel Flanges offers several advantages:
- Extended Service Life: The superior corrosion resistance and high-temperature stability of 825 Inconel Flanges ensure a longer service life, even in the most demanding conditions. This reduces the need for frequent replacements, thereby lowering maintenance costs.
- Versatility: Inconel Flanges ASTM B564 825 are versatile and can be used in a variety of applications, including chemical processing, oil and gas extraction, marine engineering, and pollution control equipment.
- Reliability in Extreme Conditions: The flanges maintain their structural integrity and performance under extreme conditions, including high temperatures, high pressures, and corrosive environments.
- Cost-Effectiveness: Despite their premium price, the durability and reliability of ASTM B564 825 Inconel Flanges translate to cost savings over the long term. Reduced maintenance and replacement costs make them a cost-effective choice for many industries.
- Compliance with International Standards: Manufactured to the ASTM B564 standard, these flanges ensure compliance with international quality standards, providing assurance of safety and reliability.


Schedule and Size Chart
Nominal Pipe Size (NPS) | Schedule | Outside Diameter (OD) (inches) | Thickness (inches) | Bolt Circle Diameter (inches) | Number of Bolt Holes | Bolt Hole Diameter (inches) |
1/2″ | SCH 40, 80 | 3.50 | 0.31 | 2.38 | 4 | 0.63 |
3/4″ | SCH 40, 80 | 3.88 | 0.44 | 2.75 | 4 | 0.63 |
1″ | SCH 40, 80 | 4.25 | 0.56 | 3.12 | 4 | 0.63 |
1-1/2″ | SCH 40, 80 | 5.00 | 0.69 | 3.88 | 4 | 0.75 |
2″ | SCH 40, 80 | 6.00 | 0.75 | 4.75 | 4 | 0.75 |
3″ | SCH 40, 80 | 7.50 | 0.94 | 6.00 | 4 | 0.88 |
4″ | SCH 40, 80 | 9.00 | 0.94 | 7.50 | 8 | 0.88 |
Mechanical Properties Chart
Property | Value |
Tensile Strength | 585 MPa (85 ksi) |
Yield Strength (0.2% offset) | 275 MPa (40 ksi) |
Elongation | 30% |
Hardness | 150-200 Brinell (HB) |
Modulus of Elasticity | 196 GPa (28.5 x 10^6 psi) |
Poisson’s Ratio | 0.29 |
Specifications Chart
Specification | Details |
Standard | ASTM B564 |
Material Grade | Inconel 825 (UNS N08825) |
Type | Weld Neck, Slip-On, Socket Weld, Blind, Threaded, Lap Joint |
Size Range | 1/2″ to 24″ |
Pressure Class | 150#, 300#, 600#, 900#, 1500#, 2500# |
Face Type | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) |
Manufacturing Process | Forged |
Chemical Composition Chart
Element | Composition (%) |
Nickel (Ni) | 38.0 – 46.0 |
Chromium (Cr) | 19.5 – 23.5 |
Iron (Fe) | Balance |
Molybdenum (Mo) | 2.5 – 3.5 |
Copper (Cu) | 1.5 – 3.0 |
Titanium (Ti) | 0.6 – 1.2 |
Manganese (Mn) | 1.0 max |
Silicon (Si) | 0.5 max |
Carbon (C) | 0.05 max |
Sulfur (S) | 0.03 max |
Aluminum (Al) | 0.2 max |
Physical Properties Chart
Property | Value |
Density | 8.14 g/cm³ (0.294 lb/in³) |
Melting Point | 1370 – 1400°C (2500 – 2550°F) |
Specific Heat Capacity | 427 J/kg·K (0.102 Btu/lb·°F) |
Thermal Conductivity | 10.8 W/m·K (74.8 BTU·in/ft²·h·°F) |
Electrical Resistivity | 1.14 µΩ·m at 20°C (68°F) |
Application Chart
Industry | Applications |
Oil and Gas | Used in offshore drilling platforms, subsea piping systems, refineries, and other oil and gas facilities. |
Chemical Processing | Employed in reactors, heat exchangers, and pipelines due to resistance to sulfuric and phosphoric acids. |
Marine Engineering | Used in shipbuilding, desalination plants, and other marine applications due to its resistance to seawater. |
Nuclear Power Plants | Utilized in reactor cores, piping, and heat exchangers due to high temperature and corrosion resistance. |
Pollution Control | Ideal for use in flue gas desulfurization systems and other pollution control equipment. |
Food Processing | Suitable for use in equipment handling acids and corrosive substances. |
Pharmaceutical | Applied in piping and equipment handling aggressive chemicals. |
Why Choose Amardeep Steel Centre LLP for ASTM B564 825 Inconel Flanges?
At Amardeep Steel Centre LLP, we are committed to providing high-quality products that meet the stringent demands of various industries. Here are a few reasons why you should choose us for your Inconel Flanges needs:
- Quality Assurance: We adhere to the highest quality standards, ensuring that our ASTM B564 825 Inconel Flanges are manufactured to precise specifications and thoroughly tested for quality and performance.
- Wide Range of Products: Our extensive inventory includes a wide variety of flange types, sizes, and specifications, allowing us to meet the unique needs of our customers.
- Expertise and Experience: With years of experience in the industry, our team of experts is well-equipped to provide guidance and support in selecting the right products for your application.
- Global Reach: We serve clients around the world, providing reliable delivery and exceptional customer service to ensure that you receive your products on time and in perfect condition.
- Competitive Pricing: Our competitive pricing ensures that you receive high-quality products at a cost-effective price, delivering value for your investment.
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 ASTM B564 Inconel 825 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.