Micro-screws used in consumer electronics and appliances.
Suppliers often provide material data sheets (MDS) complying with JIS G 3539. Conclusion
The standard was known for its specific material grades, identified by the prefix "SWCH," which stands for teel W ire for C old H eading. The number indicated the approximate carbon content.
To understand JIS G 3539, one must first understand the manufacturing process it governs. Cold heading is a high-speed forging process that transforms metal wire into specific shapes—such as the heads of screws or bolts—at room temperature. This process is favored for its efficiency and ability to produce parts with excellent surface finish and dimensional accuracy. jis g3539 pdf
To access the JIS G3539 PDF document, users can visit the Japanese Standards Association (JSA) website or other authorized distributors. The document can be downloaded in PDF format, allowing users to access and reference the standard easily.
JIS G3539 specifies the carbon steel wires to be used for the manufacture of various types of screws, bolts, nuts, rivets, and other parts shaped by cold heading or cold forging processes.
The Japanese Industrial Standard is a crucial technical document for manufacturers, engineers, and procurement specialists in the automotive and fastener industries. This standard specifies the requirements for carbon steel wires used for cold heading and cold forging applications. What is JIS G3539? Micro-screws used in consumer electronics and appliances
Strict diameter tolerances ensure consistent feeding into automated cold heading machinery. Why Do Engineers Need the JIS G3539 PDF?
The use of JIS G3539 PDF offers several benefits, including:
Often used for high-tensile bolts requiring subsequent heat treatment. Common Applications (SWCH Grades) The number indicated the approximate carbon content
Annealed at an intermediate or final stage to restore maximum ductility. DA: Drawn and subsequently annealed. Microstructural Integrity
| | Typical Value/Requirement | | :-------------------------- | :-------------------------------------------------- | | Tensile Strength | 440 MPa (min) / 470 MPa (min) depending on process | | Yield Strength | Information not directly available in search | | Elongation | Dependent on wire diameter and condition | | Reduction of Area | ≥ 55% (typical for cold heading quality wire) | | Surface Quality | Smooth, free from defects detrimental to cold work |