This supersession is not an indication that the material specifications are obsolete, but rather that the standard has been established as a newer, more comprehensive document for the same product category. The table below outlines the official succession of standards for cold heading steel materials:
JIS G3539 is a Japanese Industrial Standard (JIS) that specifies the requirements for steel wires for cold heading and cold extruding. The standard is widely used in Japan and other countries for the production of steel wires used in various industrial applications, such as bolts, nuts, and other fasteners. In this essay, we will provide an overview of JIS G3539 and its significance, as well as discuss the contents of the JIS G3539 PDF.
| | Superseding Standard | Superseded Date | | :-------------------- | :---------------------------------------------- | :----------------------------- | | JIS G3539:1991 | JIS G3507-2:2005 (Cold heading steel - Wire) | January 20, 2005 | jis g3539 pdf
For the most straightforward way to legally acquire the standard:
A: The English title is " Carbon steel wires for cold heading and cold forging ", and the Japanese title is " 冷間圧造用炭素鋼線 ". This supersession is not an indication that the
Used for high-strength bolts and automotive components that undergo subsequent heat treatment (quenching and tempering). 2. Chemical Composition
| | Carbon Content (C) Approx. | Characteristics and Typical Applications | | :--------------- | :----------------------------- | :-------------------------------------------------------------------------------------------------------------------------------------------------- | | SWCH 10A | 0.10% | Excellent ductility and formability. Ideal for manufacturing simple, low-strength parts like rivets, washers, and small-diameter fasteners. | | SWCH 12A | 0.12% | A low-carbon grade offering a good balance of strength and formability for standard cold heading processes. | | SWCH 15A | 0.15% | Used for medium-strength fasteners, offering increased hardness over lower carbon grades while maintaining adequate cold formability. | | SWCH 17K | 0.17% | Provides enhanced mechanical properties suitable for automotive components where higher strength is required. | | SWCH 18A | 0.18% | A popular grade for general-purpose fasteners, offering good strength and consistent performance in cold heading. | | SWCH 22A (SWRCH22A) | 0.18-0.23% | A medium-carbon, aluminum-killed steel with excellent plasticity, superior weldability, and good workability for complex part geometries. | | SWCH 24K | 0.24% | Designed for applications requiring higher tensile strength, such as high-strength bolts and screws. | | SWCH 35K | 0.32-0.38% | A higher-strength grade for large-diameter bolts and critical structural fasteners, offering superior hardness and wear resistance. | In this essay, we will provide an overview
These values are approximate, as precise tensile strength depends on the wire diameter and processing condition.
Production of high-tensile bolts, screws, rivets, and studs.