The A143/A143M-07(2014) is a standard specification for free-cutting carbon steel rod for cold heading and machining. It specifies the chemical composition, mechanical properties, and other requirements for this steel grade.
Chemical Composition:
The chemical composition of A143/A143M-07(2014) steel grade is as follows:
– Carbon (C): 0.15% maximum
– Manganese (Mn): 0.60% to 0.90%
– Phosphorus (P): 0.040% maximum
– Sulfur (S): 0.055% maximum
– Silicon (Si): 0.10% to 0.35%
Mechanical Properties:
The mechanical properties of A143/A143M-07(2014) steel grade are specified as follows:
– Tensile Strength: The minimum tensile strength of the steel is 65,000 psi (448 MPa).
– Yield Strength: The minimum yield strength of the steel is 45,000 psi (310 MPa).
– Elongation: The minimum elongation of the steel is 24% in 1 inch (25.4 mm).
Applications:
A143/A143M-07(2014) steel grade is commonly used for manufacturing various components and parts that require easy machining and excellent surface finish. Some of its applications include:
– Cold heading: This steel grade is suitable for cold heading operations, where the steel is formed into fasteners, such as screws, bolts, and rivets, without the need for additional machining.
– Machining: Due to its free-cutting properties, this steel grade is also used for general machining operations, such as turning, milling, and drilling. It enables efficient and precise machining, resulting in smooth surfaces and close tolerances.
– Automotive industry: A143/A143M-07(2014) steel grade is often used in the automotive industry to produce various components, such as engine parts, transmission parts, and fasteners.
– Precision parts: Its excellent machinability and surface finish make it suitable for manufacturing precision parts, such as gears, shafts, and bushings.
Overall, A143/A143M-07(2014) steel grade is a versatile and widely used carbon steel grade that offers good machinability, surface finish, and strength properties.