AISI S904
Full Name
AISI S904 – Test Standard for Determining the Tensile and Shear Strengths of Steel Screws
Scope
AISI S904 is a standardized test method developed by the American Iron and Steel Institute (AISI) to evaluate the tensile and shear strength properties of steel screws used in various construction and industrial applications. This standard provides a consistent and reliable procedure for manufacturers, engineers, and quality control personnel to assess the performance and suitability of steel screws for their intended use.
Scope and applicability: AISI S904 applies to steel screws of all diameters and lengths, including those with various head styles, thread forms, and coatings. The standard covers both quenched and tempered and non-heat-treated screws.
Test methods:
- Tensile strength test: this test determines the maximum tensile load a screw can withstand before fracturing. The screw is gripped by threaded grips in a tensile testing machine and subjected to a uniaxial tensile load until failure. The tensile strength is calculated as the maximum load divided by the screw’s stress area.
- Shear strength test: this test measures the resistance of a screw to shear forces. The screw is inserted through pre-drilled holes in two steel plates and subjected to a shear load until failure. The shear strength is calculated as the maximum shear load divided by the shear area of the screw.
Specimen preparation and testing procedures: AISI S904 outlines specific procedures for preparing test specimens, including the number of screws required, the dimensions of the test plates for shear testing, and the gripping methods for tensile testing. The standard also specifies the testing machine requirements, loading rates, and data recording procedures.
The results obtained from AISI S904 testing provide critical information about the mechanical properties of steel screws. This data is essential for:
- Quality control: ensuring that screws meet the required strength specifications.
- Design and engineering: selecting appropriate screws for specific applications based on their load-bearing capacity.
- Material comparison: evaluating the performance of different steel grades and coatings.
- Failure analysis: investigating screw failures in structures or assemblies.
AISI S904 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the AISI S904 standard. Our testing services can help you verify the quality of your screws, optimize your designs, and ensure the safety and reliability of your products.
Contact us today to learn more about how our AISI S904 testing services can meet your specific needs.
Resources
Keywords
steel screws; tensile strength; shear strength; test method; mechanical properties; stress area; shear area; tensile testing machine; specimen preparation; gripping methods; loading rates; data recording; quality control; failure analysis