The JIS G3539 standard applies to steel wires with diameters ranging from 0.1 mm to 30 mm, used in various fields such as:
Here is the breakdown of the typical chemical composition for several common SWCH grades defined by JIS G3539:
Limits on surface seams, cracks, or scale. jis g3539 pdf
If you are in the process of sourcing, ensure your supplier provides certifications confirming compliance with the latest standard. If you'd like, I can help you: Compare specific SWCH grades (e.g., SWCH10A vs. SWCH20A).
The primary use is the production of fasteners such as screws, bolts, and nuts. The JIS G3539 standard applies to steel wires
The American National Standards Institute provides access to foreign standards, including JIS documents, for legal download.
Accessing JIS G 3539 as a digital document allows engineers to quickly keyword search for specific tables—such as the maximum allowable diameter reduction or specific chemical bounds for a grade like SWRCH 35K. However, this accessibility comes with the caveat of version control. Standards are living documents, updated to reflect new materials and technologies (such as the transition to boron steels as a substitute for scarce alloying elements). Engineers relying on a PDF must ensure they are referencing the latest revision, as an outdated document could lead to non-compliance or safety hazards. SWCH20A)
Decarburization depth and surface seams are strictly limited. A PDF reference sheet outlines the maximum allowable seam depth relative to the wire diameter.
The wires certified under JIS G3539 are primary raw materials for producing high-strength fasteners and complex mechanical components. Common applications include: Bolts, nuts, screws, rivets, and studs.
Using third-party document-sharing websites to download free PDFs introduces serious compliance risks. Outdated revisions may contain obsolete testing methods or chemical limits, leading to manufacturing defects, product failures, or rejected quality audits. Always verify that your document version matches the current industry requirement. If you need help analyzing this standard, let me know: