JIS G3539 classifies the wires into several grades, generally designated by the acronym (Steel Wire Cold Heading) followed by a number indicating the approximate carbon content or grade type. Common grades specified under JIS G3539 include:
Without JIS G 3539, every batch of wire would require extensive testing to ensure it won't crack the dies. By adhering to this standard, the mill guarantees that the wire possesses the specific metallurgical structure (typically a fine pearlite or spheroidized structure) necessary for the forming process. This standardization reduces friction in the supply chain, lowers rejection rates, and ensures that a Grade 10.9 bolt produced in one factory performs identically to one produced in another.
Utilizing the exact testing methodologies prescribed by the Japanese Standards Association (JSA).
JIS G3539 is a standard that covers steel wires used for cold heading and cold extruding, which are processes used to manufacture fasteners, such as bolts, nuts, and rivets. The standard specifies the requirements for the chemical composition, mechanical properties, and microstructure of steel wires used for these applications. The standard also provides guidelines for the testing and inspection of steel wires to ensure that they meet the required specifications.
Production of high-precision screws and rivets.
Cold heading and cold forging are severe plastic deformation processes. Metal is formed at room temperature using high-pressure dies. JIS G3539 specifies carbon steel wires explicitly tailored to withstand these extreme forces without cracking or internal tearing. Core Applications
This process alters the microscopic structure of carbon steel into spherical carbide shapes. It maximizes the material's ductility, making it ideal for severe cold deformation.
Purchase directly from the JSA Web Desk or authorized global distributors like IHS Markit, Techstreet, or SAI Global.
The American National Standards Institute offers global standards, including JIS documents, for purchase.
If you need to check specific tensile strengths or chemical compositions, I can help you locate the exact tables in the standard. Let me know which, if any, specific you are looking for.
The wire rods used for manufacturing these wires must conform to JIS G 3507 .
JIS G3539 is distinct from other Japanese steel standards, though it is often mentioned alongside them. The table below highlights the key differences:
The standard classifies wire rods into various grades based on carbon content and intended application severity. Common designations follow the format (Steel Wire for Cold Heading), followed by a number indicating the carbon content or specific grade characteristics (e.g., SWCH10A, SWCH12A, SWCH15A, SWCH18A, SWCH20A, etc.).
No. It was officially withdrawn and replaced by (later revisions confirmed) as of January 20, 2005.
Engine bolts, chassis fasteners, special pins, and studs.