Understanding and Preventing Hydrogen Embrittlement in Threaded Fasteners

by Aanuraj | Mar 14, 2024 | ASTM A193 Gr.347 UNS S34700

Hydrogen embrittlement poses a significant challenge in various industries, particularly in the realm of hot-dip galvanized materials. This phenomenon occurs when metals absorb hydrogen during processes like electroplating, leading to a brittle and failure-prone material. In this technical blog, we delve into the intricacies of hydrogen embrittlement, its causes, and most importantly, the preventive measures that can be employed to mitigate its effects.

Understanding Hydrogen Embrittlement:
Hydrogen embrittlement is characterized by the brittleness of metals due to the absorption of hydrogen atoms into the material’s structure. The degree of embrittlement correlates directly with the amount of hydrogen absorbed. This absorption can occur during various manufacturing processes, including electroplating and pickling.

Causes of Hydrogen Embrittlement:
1. Hydrogen Absorption: Metals absorb hydrogen from the surrounding environment during processes like electroplating.
2. Residual Stress: Residual or applied stress in the material exacerbates its susceptibility to embrittlement.
3. Material Composition: Certain materials, particularly high-strength steels, are more prone to hydrogen embrittlement.
4. Environmental Factors: Exposure to hydrogen-containing environments during manufacturing processes can accelerate embrittlement.

Preventive Measures:
1. Minimize Hydrogen Exposure: Implement measures to reduce exposure of materials to hydrogen-containing environments during manufacturing processes.
2. Post-Plating Baking: After electroplating, subject the material to baking at temperatures ranging from 190 to 220°C for several hours. This facilitates the diffusion of hydrogen out of the material, mitigating embrittlement.
3. Material Selection: Opt for materials with lower susceptibility to hydrogen embrittlement, such as lower strength steels.
4. Stress Reduction: Minimize residual and applied stresses in the material to decrease the likelihood of embrittlement-induced cracking.
5. Proper Handling and Storage: Ensure proper handling and storage of materials to prevent contamination with hydrogen-containing substances.
6. Surface Treatments: Implement surface treatments or coatings that act as barriers to hydrogen absorption.
7. Testing and Quality Control: Incorporate rigorous testing procedures to detect hydrogen embrittlement early in the manufacturing process, coupled with robust quality control measures to prevent its occurrence.

Conclusion:
Hydrogen embrittlement poses a significant challenge in industries reliant on metal materials. However, by understanding its causes and implementing preventive measures, such as minimizing hydrogen exposure and post-plating baking, manufacturers can mitigate its adverse effects and ensure the integrity and reliability of their products. As the demand for high-performance materials continues to rise, addressing hydrogen embrittlement becomes increasingly crucial in maintaining product quality and safety.

Keywords: Hydrogen Embrittlement, Metal Materials, Preventive Measures, Electroplating, Baking Process, Material Integrity, Manufacturing Processes.

Galling of Stainless Steel Threads

by Aanuraj | Mar 11, 2024 | Aanuraj Fasteners Pvt Ltd

“Tackling Fastener Thread Galling: Effective Solutions”

Galling is a prevalent issue encountered with stainless steel fasteners, stemming from friction-induced wear between surfaces. This problem often arises during bolt installation into threaded holes due to the inherent stickiness of stainless steel. Fortunately, there are effective strategies to mitigate galling and maintain the integrity of stainless steel fastenings.

To prevent galling, lubrication stands out as the foremost solution. By applying lubricants, a protective layer forms between surfaces, facilitating smooth sliding and reducing heat and friction generation. Another preventive measure involves utilizing two different steel grades, each with distinct hardness ratings. This approach minimizes the likelihood of material deformation.

Moreover, controlling the installation speed is crucial for reducing friction between fastener materials. Sensitivity to resistance during installation is paramount; halting at the slightest indication of resistance can forestall galling progression. Additionally, caution must be exercised to avoid pulling joints together forcefully, as this can lead to thread deformation and bolt damage.

At Aanuraj, we offer a comprehensive range of stainless steel fasteners that adhere to ASTM standards and boast exceptional resistance against galling. Our inventory includes stainless steel bolts, full-threaded studs, hex nuts, and washers, all engineered to withstand challenging environments and prolonged usage.

To summarize the key points:
1. Utilize lubrication to create a protective barrier between surfaces and minimize friction.
2. Opt for stainless steel fasteners with varying hardness ratings to prevent material deformation.
3. Control installation speed to mitigate friction and reduce the likelihood of galling.
4. Exercise caution and stop immediately upon encountering resistance during installation to prevent galling.
5. Avoid forcefully pulling joints together to prevent thread deformation and bolt damage.

At Aanuraj, we prioritize the longevity and performance of our stainless steel fasteners, ensuring they meet stringent quality standards and offer superior galling resistance. Trust us for your fastening needs, and experience durability and reliability like never before.

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SMO 254 Materials Studs Bolts Nuts

by Aanuraj | Jan 20, 2023 | ASTM A193 Gr.347 UNS S34700

SMO 254 Studs Bolts Nuts For Various Industries:

SMO 254 (6Mo or 6Moly) is a high-alloy stainless steel that is known for its excellent corrosion resistance and high strength.

It is commonly used in a wide range of industries where corrosion resistance and high strength are required.

Some of the main industries where SMO 254 nuts and bolts are used include:

Oil and Gas Industry: SMO 254 is often used in the oil and gas industry for equipment that is exposed to harsh environments, such as offshore platforms, pipelines, and refineries. Its excellent corrosion resistance and high strength make it well-suited for use in these environments

Chemical Industry: The chemical industry uses a lot of corrosive chemicals, and SMO 254’s high resistance to chloride-induced stress corrosion cracking makes it an ideal choice for use in this industry.

Power Generation Industry: SMO 254 is commonly used in the power generation industry for components such as heat exchangers, boilers, and other high-temperature equipment. Its high-temperature resistance makes it well-suited for use in this industry.

Pharmaceutical and Biotech Industry: SMO 254 is also used in the pharmaceutical and biotech industries for equipment such as fermenters, mixers, and other process equipment. The material’s excellent corrosion resistance makes it well-suited for use in these environments.

Marine and Shipbuilding Industry: SMO 254 is also used in the marine and shipbuilding industry for components such as shafts, propellers, and other equipment that is exposed to harsh marine environments. Its excellent corrosion resistance and high strength make it well-suited for use in this industry.

Paper Industry: SMO 254 is well-suited for use in paper industries because of its high resistance to heat and high temperatures, as well as its corrosion resistance.

Nuclear Industry: SMO 254 is also used in the nuclear industry for components such as valves, pumps, and other equipment that is exposed to high radiation and corrosive environments.

Aerospace Industry: SMO 254 is also used in the aerospace industry for components such as landing gear, engine parts, and other high-performance equipment.

Aanuraj Fasteners Pvt Ltd, have experties in mfg and supply of SMO 254 Nuts And Bolts under Third Party Inspection for India’s Leading chemical plant in Gujarat.

Please Click here to see the Range.

Coated High Tensile Fasteners For Petrochemical Plants

by Aanuraj | Jan 19, 2023 | ASTM A193 Gr.347 UNS S34700

Coated High Tensile Fasteners are a game-changer for Petro-chemical Plants.

Coated High Tensile Studs, Nuts, Bolts, and Fasteners are designed to withstand harsh environments, making them a perfect fit for the Petrochemical industry.

One of the biggest challenges in petrochemical plants is corrosion. Traditional fasteners simply cannot handle the constant exposure to chemicals, salt water, and extreme temperatures. This results in frequent replacements, which can be costly and time-consuming.

Coated High Tensile Fasteners, on the other hand, are designed to resist corrosion. They are coated with a layer of material that protects the fastener from the harsh environment. This not only extends the life of the fastener but also reduces the need for frequent replacements.

In addition to corrosion resistance, these fasteners also offer High Tensile Strength. They can withstand heavy loads and maintain their integrity under pressure. This is crucial in the petrochemical industry where Safety is of the utmost importance.

Another benefit of Coated High Tensile Fasteners is their Versatility. They can be used in a variety of applications, including pipelines, storage tanks, and process equipment. This makes them a cost-effective solution for petrochemical plants.

In conclusion, Coated High Tensile Fasteners are an excellent solution for the petrochemical industry.

They offer corrosion Resistance, High Tensile Strength, and Versatility, making them a Reliable and Cost-Effective option for petrochemical plants.

It is a perfect fit for companies and plants that are looking for a cost-effective solution for their fastening needs, with the added benefit of longevity and safety.

Aanuraj Fasteners Pvt Ltd, manufactures High Tensile Studs Bolts And Nuts with

XYLAN Coating, PTFE Coating, HDG Coating, Zinc Galvanized.

Threaded Fasteners For Infrastructure Projects

by Aanuraj | Jan 19, 2023 | ASTM A193 Gr.347 UNS S34700

Threaded Fasteners Used For Infrastructure Projects:

High-tensile foundation bolts, also known as anchor bolts, are used in infrastructure projects to secure structures to concrete foundations. These bolts are made from high-strength materials, such as alloy steel, and are designed to withstand significant loads and forces.

One of the main benefits of using high-tensile foundation bolts is their ability to provide a strong and secure connection between the structure and the foundation. This is particularly important in infrastructure projects, such as bridges and buildings, where the safety and stability of the structure is of paramount importance.

Another benefit of high-tensile foundation bolts is their ability to resist corrosion. This is important for infrastructure projects that are located in areas with high levels of moisture or exposure to the elements. The use of high-tensile foundation bolts can help to extend the life of the structure and reduce maintenance costs.

When selecting high-tensile foundation bolts for an infrastructure project, it is important to consider the specific requirements of the project, such as the loads and forces that the bolts will be subjected to, and the environmental conditions of the location. It is also important to ensure that the bolts are installed correctly and in compliance with all relevant building codes and standards.

In summary, high-tensile foundation bolts are an important component in infrastructure projects, as they provide a strong and secure connection between the structure and foundation, and resist corrosion. They are important to consider when selecting the right anchor bolts to fit specific project requirements and location conditions.

Aanuraj Fasteners Pvt Ltd, Manufactures Foundation Bolts, High Tensile Hex Bolts, and Studs in the Grade and specification as per customer’s requirements.