Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60000 PSI Tensile Strength

Theory:

This writeup covers tensile testing of carbon steel bolts and rods. These materials can be seperated based on their Grades - either A, B, or C. The grade specifies the tensile strength of the steel. Grade A studs and threaded rods have a minimum tensile strength of 60 ksi and are intended for general uses. Bolts with a tensile strength between 60 and 100 ksi are labeled as Grade B. Higher Strength materials in Grade C now fall under the slightly different specificaiton which is F1554 which is used for structural applications. 

Geometry:

The tensile rods can range from one quarter of an inch all the way up to 4 inches. There is no reduced section with these samples and they are usually tested "as is" as opposed to being machined into a dogbone style specimen. 

Solution:

ASTM A307 is relatively simple to perform. Bolt Grips are used on a material testing system. There are slightly different varieties of threaded gripes depending on if the sample rods are externally threaded, or just headed with a Hex nut. 

Analysis:

Tensile strength, Elongation, and yield strength are the 3 main results for this type of test. Universal Grip carries all of the equipment needed to perform this type of test including software for data analysis. 

Similar Specifications:

ASTM E8 - Metal Tensile Test

ASTM A370 - Test Methods for Steel Products

ASTM F1544 - Tensile Test on Anchor Bolts