Decarburization depth and surface seams are strictly limited. A PDF reference sheet outlines the maximum allowable seam depth relative to the wire diameter.
. These wires are primarily used to manufacture fasteners like bolts, nuts, rivets, and machine screws. Key Technical Specifications
Since JIS standards are copyrighted documents, they are not available for free on official channels. However, you can purchase a legitimate PDF from authorized sources.
JIS G3539, though now superseded by JIS G3507-2:2005, remains a significant document in the history of cold heading wire specifications. It established the benchmarks for a wide range of SWCH grades that continue to be used in fastener and cold-formed component production. For engineers, quality control teams, and procurement professionals, understanding this standard is essential for verifying material compliance, especially in contexts where legacy drawings or older manufacturing records are still in use. jis g3539 pdf
For larger diameter wires, the wire is flattened to a specified height ratio. Surface must remain crack-free.
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Specifies the minimum strength required to withstand forming forces. Decarburization depth and surface seams are strictly limited
Automotive, construction, machinery manufacturing, and fastener industries often require this standard for safety and reliability. Key Technical Specifications of JIS G3539
Low carbon content (below 0.15%) provides the high ductility required for severe cold heading. Higher carbon would cause cracking during the forming of screw heads or threads.
JIS G 3539 specifies the requirements for carbon steel and alloy steel wire rods intended for cold heading and cold forging. Unlike generic steel standards which may focus solely on tensile strength or chemical composition, G 3539 places a heavy emphasis on . These wires are primarily used to manufacture fasteners
: Limits how much carbon can be lost from the surface during heat treatment, preserving surface hardness. 🔬 Classification & Grades
Accessing the official JIS G3539 PDF manual is critical for several supply chain steps: