Grade 12.9 Hex Bolts: Specifications, Properties, and Top Manufacturers

Introduction to Grade 12.9 Hex Bolts

Grade 12.9 Hex Bolts are renowned for their exceptional strength, durability, and resistance to high stress. These bolts are widely used in industries where high tensile strength is critical, such as automotive, construction, aerospace, and heavy machinery. The “12.9” designation indicates that these bolts possess a tensile strength of 1,200 MPa and a yield strength of 90% of the tensile strength, making them ideal for applications requiring high performance under challenging conditions.

Key Features of Grade 12.9 Hex Bolts

1. High Tensile Strength: With a tensile strength of 1,200 MPa, these bolts can withstand heavy loads.
2. Enhanced Durability: Designed to resist wear and tear in demanding environments.
3. Corrosion Resistance: Depending on surface treatment, they offer resistance to rust and corrosion.
4. Versatile Applications: Suitable for critical industries including automotive, construction, and heavy engineering.

Specifications of Grade 12.9 Hex Bolts

To ensure consistency and reliability, Grade 12.9 Hex Bolts are manufactured to precise specifications. The common format includes:

1. Material Composition: Alloy steel with elements like carbon, chromium, and molybdenum for added strength.
2. Dimensions: Available in various sizes ranging from M4 to M100, depending on application requirements.
3. Thread Type: Coarse, fine, or custom threads.
4. Surface Finish: Black oxide, zinc-plated, hot-dip galvanized, or plain.
5. Standards: Conforming to international standards such as ISO 898-1, DIN 933, and ANSI.

Mechanical Properties of Grade 12.9 Bolts

The mechanical properties of Grade 12.9 Bolts make them a top choice for high-stress applications:

• Tensile Strength: 1,200 MPa (minimum)
• Yield Strength: 90% of tensile strength (1,080 MPa)
• Hardness: 385-435 HB
• Elongation: 8% (minimum)
• Shear Strength: Approximately 0.6 times the tensile strength

These properties ensure the bolts provide superior performance even under extreme stress and high temperatures.

Applications of Grade 12.9 Hex Bolts

Grade 12.9 Hex Bolts are extensively used in:

1. Automotive Industry: For engine assembly, chassis, and other critical components.
2. Construction Sector: For structural frameworks, bridges, and heavy equipment.
3. Aerospace Industry: To ensure safety and reliability in high-pressure environments.
4. Machinery and Equipment: For joining heavy components securely.

Grade 12.9 Bolt Manufacturers

Ananka Group is a leading manufacturer and supplier of Grade 12.9 Bolts, offering high-quality fasteners tailored to industry needs. Our products are available in various sizes, dimensions, and finishes, and we also provide customization to suit specific requirements.

Why Choose Ananka Group for Grade 12.9 Hex Bolts?

1. Top-Notch Quality: Our bolts are manufactured using premium alloy steel and advanced technology.
2. Global Standards: Compliance with ISO, DIN, and ANSI standards.
3. Customization: We offer tailored solutions to meet unique application needs.
4. Timely Delivery: With a robust supply chain, we ensure prompt delivery.
5. Expert Support: Our experienced team provides guidance to select the right bolts for your application.

Conclusion

Grade 12.9 Hex Bolts are indispensable in industries that demand superior strength, reliability, and durability. With their exceptional mechanical properties and versatile applications, these bolts continue to be a preferred choice for high-performance fastening solutions. Ananka Group’s commitment to quality and innovation makes us the ideal partner for all your fastener needs.

Frequently Asked Questions (FAQ)

Q1. What does the grade "12.9" signify in hex bolts?

The grade "12.9" indicates a tensile strength of 1,200 MPa and a yield strength that is 90% of the tensile strength.

Q2. Can Grade 12.9 Hex Bolts be used in high-temperature environments?

Yes, they are suitable for high-temperature environments due to their robust material composition and mechanical properties.

Q3. Are Grade 12.9 Hex Bolts resistant to corrosion?

Depending on the surface finish, such as zinc plating or hot-dip galvanization, they offer good corrosion resistance.

Q4. Does Ananka Group provide customized Grade 12.9 Hex Bolts?

Yes, we offer customization in dimensions, thread type, and surface finish to meet specific application requirements.

Q5. What industries commonly use Grade 12.9 Hex Bolts?

These bolts are widely used in automotive, aerospace, construction, and heavy machinery industries.