ASTM A109/A109M defines the standard specifications for cold-rolled carbon steel strip, focusing on tight dimensional tolerances and mechanical properties for applications requiring a maximum carbon content of 0.25%. The standard categorizes these strips into five distinct tempers, ranging from No. 1 (Hard) to No. 5 (Dead Soft), defining their respective ductility and forming capabilities. Purchase the full standard on the ASTM International website. AI can make mistakes, so double-check responses Copy Creating a public link... You can now share this thread with others Good response Bad response Show all
No. 1 (Hard): This is a very stiff, brittle steel intended for flat work where bending is not required.No. 2 (Half-Hard): Offers moderate stiffness and can be bent 90 degrees across the direction of rolling.No. 3 (Quarter-Hard): A versatile temper that allows for limited drawing and 180-degree bends.No. 4 (Skin Rolled/Soft): Highly ductile and intended for deep drawing and complex forming.No. 5 (Dead Soft): The most formable option, used for the most difficult drawing applications where minimum spring-back is required. Applications of ASTM A109 Materials
Automotive: Seat belt components, brackets, and structural clips.Hardware: Hinges, springs, and washers that require precise tension.Electronics: Shielding and small stamped enclosures.Appliances: Internal components that require high formability and a smooth finish. Why the Official ASTM A109 PDF Matters astm a109 pdf
: Produced via open-hearth, basic-oxygen, or electric-furnace processes. 📈 Tempers and Mechanical Properties
You're looking for the ASTM A109 standard in PDF format! 5 (Dead Soft), defining their respective ductility and
Chemical Composition: The standard primarily focuses on carbon steel with a carbon content generally below 0.25%. This ensures a balance between strength and formability.Dimensional Precision: One of the main reasons engineers reference the ASTM A109 PDF is for its strict thickness and width tolerances, which are more precise than standard cold-rolled sheet.Edges and Finishes: ASTM A109 defines various edge types (No. 1 through No. 6) and finishes (No. 1 matte, No. 2 regular bright, and No. 3 best bright). The Five Temper Designations
: Widths typically range from 0.5 in. to 23 15/16 in. (12.5 mm to 600 mm) with a thickness of 0.300 in. (7.6 mm) and under. You can now share this thread with others
ASTM A109 covers steel strip in cut lengths or coils, available in two primary compositions: