The ASTM A325 is a type of high-strength heavy hex structural bolt with diameters ranging from 0.5 inches to 1.5 inches. They possess a shorter thread length than standard hex bolts, since they are manufactured for use in structural connections. In contrast, for those who wish for bolts for general applications, such as anchor bolts, Specification A449 bolts are more suitable.
The ASTM A325 heavy hex structural bolts were manufactured in three types: Type 1, which are medium carbon, carbon boron or medium carbon alloy steel; Type 2, which was withdrawn in November 1991; and Type 3, which is made from weathering steel. In addition, there was a type T manufactured that is a fully threaded version of the A325, restricted to four times its diameter in length, and the type M, which is a metric version of the A325.
The ASTM A325 structural bolt possesses three types of connections: SC, a slip critical connection; N, a bearing type connection with threads included in the shear plane; and X, a bearing type connection with threads excluded from the shear plane.
ASTM A325 structural bolts can come with two different mechanical specifications. The first can be between 0.5 inches and 1 inch, have tensile ksi of 120 min, a yield ksi of 92 min, an elongation percentage per minute of 14 percent, and an RA percentage per minute of 35 percent. The second type possesses a size between 1.125 inches and 1.5 inches, has tensile ksi of 105 min, a yield ksi of 81 min, an elongation percentage per minute of 14 percent, and an RA percentage per minute of 35 percent.
Recommended Nuts and Washers
For Type 1 A325 structural bolts, the recommended complementary nuts are: A563C, C3, D, DH, DH3 plain types and A563DH galvanized types. The complementary washers are F436-1. Type 3 A325 structural bolts can be paired with both A563C3 and DH3 plain nuts. The compatible washers for Type 3 bolts are F436-3 types. In addition, the nuts that conform to the A194 Grade 2H can be used as a suitable substitute for use with the ATSM A325 structural bolts.
- Photo Credit Jupiterimages/Photos.com/Getty Images
What Is A193?
A193 is defined as a type of stud bolt or fastener, often made of stainless steel or an alloy material. Another type...
Specifications for the ASTM A320 L7 Bolt
ASTM International, commonly known as and formerly called the American Society for Testing and Materials, creates standards for materials and fasteners. The...
SDR-35 PVC Pipe Specifications
PVC pipe that falls under the SDR (or standard direct ratio) classification are categorized based on the ratio of their average outside...
Anchor Bolt Specifications
Anchor bolts, also called wedge anchors, are used to secure structures to concrete or masonry. The bolt extends into a hole drilled...
Standard Bolt Specifications
Nuts and bolts are fastening devices that are used together to construct objects and hold objects together. The nut rests on the...
The Specifications of Steel ASTM A-27 Grade 60-30
American Society for Testing and Materials A-27 steel, grade 60-30, is a low- to medium-carbon steel with a simple chemistry. This steel,...
ASTM C-33 Specifications
The ASTM C-33 guidelines address specifications for concrete aggregates, or items that are added to concrete to prepare it for use. Aggregates...
ASTM Bolt Specifications
The American Society for Testing and Materials (ASTM) has helped set standards for many different industries since it was founded in 1898....
ASTM Material Specifications
The American Society for Testing and Materials (ASTM) is an international organization that publishes standards for a wide range of products and...