AISI S903
Full Name
AISI S903 – Test Standard for Determining the Uniform and Local Ductility of Carbon and Low-Alloy Steels
Scope
AISI S903 is a standard test method developed by the American Iron and Steel Institute (AISI) to evaluate the ductility of carbon and low-alloy steels. Specifically, it focuses on determining the uniform elongation and local elongation, which are crucial properties for understanding a steel’s ability to deform before fracturing. These properties are essential for various applications, particularly in construction and manufacturing, where steel components may experience tensile stresses.
The standard outlines a procedure using a tensile test to determine ductility. A standard tensile specimen is machined from the steel being evaluated. This specimen is then subjected to a uniaxial tensile load until fracture. During the test, the elongation of the specimen is measured.
Uniform elongation represents the percentage increase in the specimen’s gauge length before the onset of necking (localized reduction in cross-sectional area). It indicates the material’s ability to undergo uniform plastic deformation under tensile stress.
Local elongation measures the percentage increase in the specimen’s gauge length after fracture, focusing on the necked region. It reflects the material’s ability to withstand localized deformation before failure.
The data obtained from AISI S903 testing provides valuable insights into the steel’s formability, drawability, and overall resistance to fracture. This information is critical for:
- Material selection: choosing appropriate steel grades for specific applications based on their ductility requirements.
- Quality control: ensuring that steel products meet the desired ductility standards.
- Product design: optimizing designs to account for the material’s ductility limitations.
- Failure analysis: investigating the causes of failures related to ductility issues.
AISI S903 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the AISI S903 standard.
Contact us today to learn more about how our AISI S903 testing services can help you ensure the quality and performance of your steel materials.
Resources
Keywords
uniform elongation; local elongation; ductility; tensile test; carbon steel; low-alloy steel; yield strength; tensile strength; gauge length; necking; fracture; strain; stress; specimen; extensometer