Do not rely on summarized tables or outdated copies. Purchase the latest official from an authorized retailer like the Japanese Standards Association or Global Engineering Documents. Your products—and your customers—depend on it.
Typical components manufactured from JIS G3539 wires include:
The Japanese Standards Association (JSA) is the primary source. jis g3539 pdf
Major steel manufacturers often provide compliance documents (PDFs) based on the JIS G3539 specifications. Summary Table of Typical JIS G3539 Properties Standard No.: JIS G3539 Common Material Symbol: SWRCH Purpose: Cold Heading and Cold Forging Wires Usage: Bolts, Nuts, Rivets
: Often followed by numbers (like 10A, 12K, 15A) indicating carbon content. Heat Treatment Symbols : D : Cold drawn. DA : Annealed after cold drawing. G : Softened by annealing. 💡 Why it matters for Engineers Do not rely on summarized tables or outdated copies
Controls the baseline strength and hardenability.
The JIS G 3539 standard serves as a cornerstone for ensuring the reliability of metallic materials in sectors ranging from automotive to general engineering. Unlike general-purpose spring steel, the materials specified under JIS G 3539 are specifically engineered for "cold-working"—a process where metal is shaped at room temperature rather than by heat. Heat Treatment Symbols : D : Cold drawn
| | SWCH8A | SWCH12A | SWCH22A | |:---|:---|:---|:---| | Carbon (C) | ≤0.10 | 0.10-0.15 | 0.18-0.23 | | Manganese (Mn) | — | 0.30-0.60 | 0.70-1.00 | | Phosphorus (P) | ≤0.030 | ≤0.030 | ≤0.030 | | Sulfur (S) | ≤0.035 | ≤0.035 | ≤0.035 | | Silicon (Si) | ≤0.10 | ≤0.10 | ≤0.10 |