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Zinc Coated Allen Bolt
QS Fastener: Zinc Coated Allen Bolt
Name: Zinc Coated Allen Bolt
Standard: ASTM
Material: A320 L7
Size: M6 to M100
Total Length: 30 to 1000 mm
Grade: A
Application: Oil Pipeline, Machinery, Chemical Industry, Building
Standard: ASTM
Material: A320 L7
Size: M6 to M100
Total Length: 30 to 1000 mm
Grade: A
Application: Oil Pipeline, Machinery, Chemical Industry, Building
Quantity
The Zinc Coated Allen Bolt adheres to ASTM standards and is made of high-strength A320 L7 alloy steel with a zinc-coated surface, offering excellent corrosion resistance and mechanical properties. It covers sizes from M6 to M100, with lengths ranging from 30 to 1000 mm, making it suitable for oil pipelines, mechanical equipment, chemical industries, and construction. It is an ideal fastening solution for harsh environments.
The design core of ASTM A320 standard fasteners lies in their excellent low-temperature performance, maintaining high strength and toughness in extreme low-temperature environments to avoid brittle fractures. Below is an analysis of the applicable temperature ranges and performance of different material grades, particularly tailored to the application scenarios of the Zinc Coated Allen Bolt.
1. Grade L7: -73°C to -101°C
Grade L7 is a medium carbon alloy steel that achieves high strength and toughness through quenching and tempering. It is suitable for moderate low-temperature environments and is one of the commonly used materials for the Zinc Coated Allen Bolt.
Grade L7 is a medium carbon alloy steel that achieves high strength and toughness through quenching and tempering. It is suitable for moderate low-temperature environments and is one of the commonly used materials for the Zinc Coated Allen Bolt.
Temperature Range
The applicable temperature range for Grade L7 is -73°C to -101°C.
The applicable temperature range for Grade L7 is -73°C to -101°C.
Low-Temperature Performance
At -73°C, the Charpy V-notch impact toughness of L7 typically exceeds 20 J, effectively resisting low-temperature brittleness.
At -73°C, the Charpy V-notch impact toughness of L7 typically exceeds 20 J, effectively resisting low-temperature brittleness.
At -101°C, the impact toughness remains above 15 J, meeting the minimum requirements of ASTM A320 and ensuring the reliability of the Zinc Coated Allen Bolt in low-temperature environments.
2. Grade L43: -101°C to -196°C
Grade L43 is a high-strength alloy steel specifically designed for lower temperature environments, offering excellent impact resistance and low-temperature toughness. It is suitable for high-performance scenarios of the Zinc Coated Allen Bolt.
Grade L43 is a high-strength alloy steel specifically designed for lower temperature environments, offering excellent impact resistance and low-temperature toughness. It is suitable for high-performance scenarios of the Zinc Coated Allen Bolt.
Temperature Range
The applicable temperature range for Grade L43 is -101°C to -196°C.
The applicable temperature range for Grade L43 is -101°C to -196°C.
Low-Temperature Performance
At -101°C, the Charpy V-notch impact toughness of L43 typically exceeds 25 J, demonstrating exceptional low-temperature toughness.
At -101°C, the Charpy V-notch impact toughness of L43 typically exceeds 25 J, demonstrating exceptional low-temperature toughness.
At -196°C, the impact toughness remains above 20 J, ensuring that the Zinc Coated Allen Bolt does not experience brittle fractures at liquid nitrogen temperatures.
3. Grade B8: -196°C to 400°C
Grade B8 is an austenitic stainless steel that combines low-temperature toughness with high-temperature strength. It is suitable for a wide temperature range from ultra-low to medium-high temperatures, making it an ideal material choice for the Zinc Coated Allen Bolt.
Grade B8 is an austenitic stainless steel that combines low-temperature toughness with high-temperature strength. It is suitable for a wide temperature range from ultra-low to medium-high temperatures, making it an ideal material choice for the Zinc Coated Allen Bolt.
Temperature Range
The applicable temperature range for Grade B8 is -196°C to 400°C.
The applicable temperature range for Grade B8 is -196°C to 400°C.
Low-Temperature Performance
At -196°C, the Charpy V-notch impact toughness of B8 typically exceeds 30 J, demonstrating excellent low-temperature toughness.
At -196°C, the Charpy V-notch impact toughness of B8 typically exceeds 30 J, demonstrating excellent low-temperature toughness.
At -253°C (liquid hydrogen temperature), the impact toughness remains above 25 J, making it suitable for extremely low-temperature environments.
High-Temperature Performance
At 400°C, the tensile strength of B8 remains above 80 ksi (551 MPa), and the yield strength remains above 50 ksi (345 MPa), ensuring the stable performance of the Zinc Coated Allen Bolt in high-temperature environments.
At 400°C, the tensile strength of B8 remains above 80 ksi (551 MPa), and the yield strength remains above 50 ksi (345 MPa), ensuring the stable performance of the Zinc Coated Allen Bolt in high-temperature environments.
4. Experimental Data and Validation
The low-temperature performance of ASTM A320 fasteners has been rigorously validated through experiments, including:
The low-temperature performance of ASTM A320 fasteners has been rigorously validated through experiments, including:
1) Charpy V-notch Impact Test
Impact tests were conducted at -73°C, -101°C, -196°C, and -253°C to verify the low-temperature toughness of the materials.
Impact tests were conducted at -73°C, -101°C, -196°C, and -253°C to verify the low-temperature toughness of the materials.
Results: The impact toughness values of Grades L7, L43, and B8 at different temperatures all meet the ASTM A320 standards, ensuring the low-temperature reliability of the Zinc Coated Allen Bolt.
2) Low-Temperature Tensile Test
Tensile tests were conducted at -196°C to verify the tensile strength and yield strength of the materials.
Tensile tests were conducted at -196°C to verify the tensile strength and yield strength of the materials.
Results: The tensile strength and yield strength of Grades L43 and B8 showed no significant decline, proving the excellent performance of the Zinc Coated Allen Bolt in low-temperature environments.
The applicable temperature range of ASTM A320 fasteners covers a wide interval from -196°C to 400°C, meeting the engineering needs of various low-temperature and high-temperature environments. Grades L7, L43, and B8 are optimized for different temperature ranges and have been rigorously validated through experiments and practical applications, ensuring the safety and reliability of the Zinc Coated Allen Bolt in high and low-temperature environments. Whether in liquefied natural gas equipment, chemical installations, or aerospace devices, the Zinc Coated Allen Bolt provides an ideal low-temperature solution for your engineering projects.
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