Name: ASTM F3125 A490 Structural Bolt Hex Heavy Bolts
Brand: Ningbo Yokelink Machinery Co.,Limited
Price: 0.25 USD
Availability: InStock

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ASTM F3125 A490 Structural Bolt Hex Heavy Bolts

Product Details:

Place of Origin:	CHINA
Brand Name:	Yokelink

Payment & Shipping Terms:

Minimum Order Quantity:	10000pcs
Price:	$0.25~$0.55
Packaging Details:	Carton & Pallet
Payment Terms:	T/T

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Detailed Product Description

ASTM A490 Structural Bolt

ASTM A490 bolts are high-strength, heavy hex structural bolts used primarily in structural steel applications. These bolts are specifically designed to handle heavy loads, making them essential for large-scale construction projects like bridges, buildings, and wind turbine installations. In this article, we will provide an in-depth overview of ASTM A490 bolts, including their specifications, applications, and benefits.

What is an ASTM A490 Bolt?

ASTM A490 bolts are high-strength, heat-treated structural bolts made from alloy steel. They have a minimum tensile strength of 150 ksi (1034 MPa), making them significantly stronger than standard structural bolts like ASTM A325. These bolts are typically used in situations where maximum load capacity and durability are required, such as in steel-to-steel connections.

Key Specifications of ASTM A490 Bolts

ASTM A490 bolts Material: Alloy steel, heat-treated

ASTM A490 bolts Tensile Strength: Minimum of 150 ksi

A490 Bolt Type: Heavy hex structural bolts

ASTM A490 bolts Sizes: Commonly available in diameters from ½ inch to 1½ inches

ASTM A490 bolts Finish: Typically plain (black finish) or with mechanical zinc coating. Hot-dip galvanizing is not allowed due to hydrogen embrittlement risk

ASTM A490 vs. ASTM A325

While both ASTM A490 and ASTM A325 bolts are used in structural steel applications, A490 bolts have higher tensile strength. Here’s a comparison:

Specification	ASTM A490	ASTM A325
Material	Alloy steel	Medium-carbon steel
Minimum Tensile Strength	150 ksi (1034 MPa)	120 ksi (827 MPa)
Heat Treatment	Yes	Optional
Applications	Heavier load capacities	Standard structural use

Applications of ASTM A490 Bolts

Due to their superior strength, ASTM A490 bolts are used in heavy-duty construction applications, such as:

Bridges: For steel connections in large spans.

High-Rise Buildings: Essential for ensuring the structural integrity of skyscrapers.

Wind Turbine Installations: Ideal for connecting heavy components in onshore and offshore wind turbines.

Cranes and Heavy Machinery: Providing secure connections for lifting equipment.

Benefits of Using ASTM A490 Bolts

High Tensile Strength: With a tensile strength of 150 ksi, A490 bolts can withstand significant loads, making them suitable for critical structural applications.

Durability: Their heat-treated alloy steel construction ensures long-lasting performance under heavy stress and environmental conditions.

Cost Efficiency: While A490 bolts may be more expensive upfront compared to lower-grade bolts, their high performance and durability lead to fewer replacements and repairs, offering long-term savings.

Precision in Steel-to-Steel Connections: ASTM A490 bolts provide a reliable fastening solution in steel structures, ensuring safety and stability.

A490 Installation and Torque Requirements

Proper installation is essential for the performance of ASTM A490 bolts. These bolts must be installed using controlled tensioning methods, typically by turning the nut while holding the bolt in place. To achieve the necessary clamping force, A490 bolts are often tensioned using calibrated torque wrenches or tension control bolts.The torque values depend on bolt size, and it’s important to follow the specified guidelines to prevent under-tensioning or over-tightening, which could compromise the bolt's integrity.

A490 Limitations and Considerations

Hydrogen Embrittlement: A490 bolts cannot be hot-dip galvanized due to the risk of hydrogen embrittlement. For corrosion protection, mechanical galvanization or Dacromet coating is recommended.

Not for Dynamic Loads: A490 bolts are typically not used in applications subject to cyclic loads or vibrations, as these can lead to fatigue failure.

Contact Details

Ningbo Yokelink Machinery Co.,Limited

Contact Person: Mr. Tony

Tel: 86-574-86882908

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