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Exploring ASTM A194 Grade 2H Nut Fasteners

Exploring ASTM A194 Grade 2H Nut Fasteners

In the realm of fasteners, nuts play a pivotal role in holding together various components in mechanical assemblies, structures, and industrial equipment. Among the diverse range of nut materials available, ASTM A194 Grade 2H nuts stand out for their exceptional strength, reliability, and suitability for high-pressure and high-temperature applications. In this article, we delve into the characteristics, applications, and benefits of ASTM A194 Grade 2H nut fasteners.

Understanding ASTM A194 Grade 2H Nuts:

ASTM A194 Grade 2H is a specification covering carbon, alloy, and stainless steel nuts for high-pressure and high-temperature service. Grade 2H nuts are specifically heat-treated carbon steel heavy hex nuts, intended for use in high-pressure and high-temperature applications such as flanges, valves, and pressure vessels. The Grade 2H designation signifies that the nuts are heat-treated to achieve a specified hardness range and mechanical properties.

Properties of ASTM A194 Grade 2H Nuts:

1. High Strength: ASTM A194 Grade 2H nuts are renowned for their exceptional strength, making them suitable for applications where high tensile strength is crucial for structural integrity and safety.

2. Heat Resistance: These nuts exhibit excellent resistance to elevated temperatures, ensuring reliable performance in environments where heat is a factor, such as in boilers, heat exchangers, and exhaust systems.

3. Corrosion Resistance: While not inherently corrosion-resistant like stainless steel nuts, Grade 2H nuts can be coated or plated to enhance their resistance to corrosion, extending their service life in harsh environments.

4. Hardness: Grade 2H nuts are heat-treated to achieve a specified hardness range, typically between HRC 32 and 39, ensuring sufficient hardness for secure fastening without brittleness.

Applications of ASTM A194 Grade 2H Nut Fasteners:

ASTM A194 Grade 2H nuts find wide-ranging applications across various industries where robust fastening solutions are required. Some common applications include:

1. Oil and Gas Industry: Grade 2H nuts are extensively used in oil refineries, offshore platforms, and pipelines for bolting flanges, valves, and pressure vessels subjected to high pressures and temperatures.

2. Power Generation: In power plants, including nuclear, thermal, and hydroelectric facilities, Grade 2H nuts are employed in turbines, boilers, and steam systems where reliable fastening is critical for operational safety and efficiency.

3. Construction and Infrastructure: These nuts are utilized in the construction of bridges, buildings, and other infrastructure projects, providing secure fastening in structural applications subjected to heavy loads and environmental stresses.

4. Heavy Machinery: In heavy machinery and equipment manufacturing, Grade 2H nuts are used in engines, turbines, and manufacturing equipment where high-strength fastening is essential for maintaining operational reliability and safety.

Benefits of ASTM A194 Grade 2H Nut Fasteners:

1. Reliability: With their high tensile strength, heat resistance, and hardness, Grade 2H nuts offer reliable performance even in the most demanding applications, ensuring long-term structural integrity and safety.

2. Versatility: These nuts are available in various sizes and configurations to accommodate different application requirements, providing versatility in design and assembly.

3. Compliance: Manufactured to stringent ASTM standards, Grade 2H nuts ensure compliance with industry regulations and specifications, offering assurance of quality and reliability in critical applications.

4. Cost-Effectiveness: Despite their premium quality and performance, ASTM A194 Grade 2H nuts are competitively priced, providing excellent value for money in terms of durability and longevity.


In conclusion, ASTM A194 Grade 2H Nut fasteners exemplify strength, reliability, and versatility in fastening solutions for high-pressure and high-temperature applications across diverse industries. With their robust properties, wide-ranging applications, and numerous benefits, Grade 2H nuts continue to be a preferred choice where uncompromising performance and safety are paramount.

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Each Stainless Steel ASTM A194 Grade 2H Nut Fasteners is otherwise designed based on the characteristics of the applying and additionally the pressure. Consequently, different industries use different ASTM A194 Grade 2H Nut Fasteners. We also produce customized ASTM A194 Grade 2H Nut Fasteners Products at our factory as per our client’s requirements. For any types of ASTM A194 Grade 2H Nut Fasteners Price List Call on +91 9152160158 or drop an Email to |

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