Stud bolts, particularly those of classes 8.8, 10.9, and 12.9, are high-strength fasteners designed to withstand significant tensile and shear loads. They are often used in critical applications where reliability and durability are paramount.
Introduction:
Class 8.8 Studs: These are made from low-carbon alloy steel or medium-carbon steel and are heat-treated (quenched and tempered) to achieve their strength. They have a minimum tensile strength of 800 MPa and a minimum yield strength of 640 Mpa.
Class 10.9 Studs: These are also made from low-carbon alloy steel and are heat-treated to achieve even greater strength than class 8.8. They have a minimum tensile strength of 1000 MPa and a minimum yield strength of 900 Mpa.
Class 12.9 Studs: These are the highest strength among the mentioned classes, with a minimum tensile strength of 1200 MPa and a minimum yield strength of 1080 Mpa.
Stainless Steel (304/316): Offers superior corrosion resistance and is suitable for moist or corrosive environments. The 316 grade has additional molybdenum, providing even better corrosion resistance, especially in marine applications.
Carbon Steel: Provides good strength and is the most common material for bolts. It may require additional surface treatments like galvanizing for increased corrosion resistance.
Alloy Steel: Offers enhanced strength and durability. It is often used in high-stress applications where high tensile strength is required.
Advantage:
High Strength: These studs can withstand high tensile, compressive, and shear forces, making them suitable for heavy-duty applications.
Reliability: The heat treatment process ensures that the studs maintain their strength and durability over time, even in challenging environments.
Threading: Full threading along the length of the stud allows for versatile application in various assembly configurations.
Corrosion Resistance: Many high-strength studs are available with surface treatments like black oxide, zinc plating, or hot-dip galvanizing, which protect against corrosion.
Scope of Application
Construction: Used in structural applications such as bridges, high-rise buildings, and other heavy structures where high clamping forces are required.
Automotive Industry: Employed in the assembly of vehicles, especially in areas that require high strength and safety, such as engine and chassis assemblies.
Aerospace: Utilized in aircraft construction for joining components that need to withstand high stress and vibration.
Mechanical and Plant Engineering: Used for securing machinery components, such as pumps, motors, and other equipment that requires high-strength fastening solutions.
Quality Certification
Hebei Bentley is ISO9001:2015 certified and equipped with relevant certificates for quality assurance. Due to its specific dimensions and performance levels, it is suitable for a wide range of industrial and commercial scenarios including, but not limited to: machine building, construction work, transport, energy industry, timber frame connections.
Quality inspection
Bentley has invested a huge amount of money to builda product testing laboratory, equipped with importedhigh-end instruments:such as thread comprehensivescanners, high temperature tensile testing machines,high frequency fatigue testing machines, etc., to ensurethat all products are strictly tested before leaving thewarehouse to ensure the reliability of customers duringuse.