ASTM A325 Bolts

ASTM A325 fasteners are generally high-strength structural bolts in a specialized classification of fasteners. A325 fasteners are very different from general fasteners because ASTM A325 defines exact criteria for chemical, mechanical and configuration requirements making them a necessity for top heavy-duty construction. 

These bolts are manufactured from medium-carbon or alloy steel and undergo a crucial heat treatment process of quenching and tempering. This treatment is what develops their signature high tensile strength, with a minimum of 120 ksi (approximately 830 MPa), and a Rockwell hardness of 25-35 HRC. A defining feature of an A325 Hex bolt is its heavy hexagonal head, which provides a larger bearing surface for high-torque applications.

The ASTM A325 specification includes two distinctly different types of quenched and tempered (HTCP) steel heavy hex bolts:

• Type 1 Fasteners: Type 1 Fasteners must have, at a minimum, a tensile strength of 105 ksi (approx. 724 MPa), with a minimum yield strength of 81 ksi (approx. 558 MPa), also requiring hardness range of 25-35 HRC.
• Type 3 Fasteners: Weathering steel bolting materials providing similar strength to Type 1 but with enhanced corrosion protection. Type 3 fasteners possess a unique self-healing capability, forming a protective oxide layer when damaged, ideal for humid environments.

“Contact Jade Special Metals today with your requirement for ASTM A325 Bolts. We assure you of the best quote.

Heavy Machinery & Equipment: Assembling heavy-duty equipment like cranes, earth-movers, and industrial presses where high strength and vibration resistance are critical.
Industrial & Infrastructure: Building robust structures like pipe racks and equipment supports in refineries, factories, and transportation systems like railways and shipping ports.
Mining Operations: Constructing and maintaining heavy equipment and structural supports in harsh mining environments.

Choosing the right supplier for critical components like ASTM A325 Fasteners is essential for project safety and success. At Jade Special Metals, we are not just a distributor; we are a dedicated partner committed to excellence. Here are some reasons our trusted partners utilize our services:

• Expert Manufacturer & Global Exporter: We have deep expertise in manufacturing A325 bolts to exact specifications and a robust logistics network to export them worldwide, ensuring you get factory-direct quality and pricing.
• Guaranteed Quality & Full Traceability: Quality is our top priority. All our ASTM A325 fasteners are supplied with Mill Test Certificates (MTCs) as per EN 10204 3.1, guaranteeing compliance with material chemistry and mechanical properties.
• Competitive Price & Value: Our efficient manufacturing processes and large-scale procurement allow us to offer a highly competitive price on all A325 products, providing exceptional value without compromising on quality.
• Extensive Inventory for Fast Delivery: We maintain a vast inventory of standard-size A325 Structural Bolts, including ASTM A325 Galvanized Bolts, ensuring we can meet your project timelines with prompt delivery.
• Custom Manufacturing Capabilities: If your project requires non-standard lengths, custom threading, or unique configurations like A325 anchor bolts, our in-house manufacturing capabilities allow us to produce them to your exact drawings.