: Contains a maximum of 0.25% Carbon , 0.90% Manganese , and 0.025% Phosphorus/Sulfur .

The standard differentiates "strip" from "sheet" by its stricter tolerances and specific processing requirements.

The "Temper" system in ASTM A109 is a numerical scale used to define the hardness and ductility of the steel.

In the manufacturing and engineering sectors, standardization is critical to ensuring material consistency, safety, and interoperability. ASTM International, formerly known as the American Society for Testing and Materials, is one of the largest voluntary standards development organizations in the world.

When sourcing ASTM A109 material, always verify that the supplier provides a Material Test Report (MTR) confirming that the steel meets the specific temper and chemical requirements outlined in the latest version of the standard. 3 or No. 4?

The ASTM A109/A109M standard covers cold-rolled carbon steel strip in cut lengths or coils. Unlike cold-rolled sheet, the strip designation implies a product with tighter tolerances and specific metallurgical properties. The material is produced to meet specific "tempers," which represent a range of mechanical properties from full hard to dead soft. Key Characteristics of ASTM A109 Steel

Due to its reliability and specific mechanical properties, ASTM A109 steel is a staple in various industries: