| Grade | C (Carbon) | Si (Silicon) | Mn (Manganese) | P (Phosphorus) | S (Sulfur) | Application Notes | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | | ≤ 0.10 | — | ≤ 0.60 | ≤ 0.040 | ≤ 0.040 | Extra low carbon for severe deformation; Suitable for rivets and special parts | | SWCH 10A | 0.08 - 0.13 | ≤ 0.10 | 0.30 - 0.60 | ≤ 0.030 | ≤ 0.035 | General low-carbon steel; Excellent for standard machine screws | | SWCH 12A | 0.10 - 0.15 | ≤ 0.10 | 0.30 - 0.60 | ≤ 0.030 | ≤ 0.035 | Slightly higher strength; Used for fasteners requiring higher core hardness | | SWCH 16A | 0.13 - 0.18 | ≤ 0.10 | 0.60 - 0.90 | ≤ 0.030 | ≤ 0.035 | Medium carbon content; Commonly utilized for self-tapping screws | | SWCH 22A | 0.18 - 0.23 | ≤ 0.10 | 0.70 - 1.00 | ≤ 0.030 | ≤ 0.035 | Higher strength; Suitable for structural bolts and nuts | | SWCH 35K | 0.32 - 0.38 | 0.10 - 0.35 | 0.60 - 0.90 | ≤ 0.030 | ≤ 0.035 | High strength carbon steel; Requires heat treatment after forming | | SWCH 45K | 0.42 - 0.48 | 0.15 - 0.35 | 0.60 - 0.90 | ≤ 0.030 | ≤ 0.035 | High strength; Capable of achieving high hardness after quenching and tempering |
High Ductility, Surface Integrity, Controlled Carbon Content
JIS G3539 typically categorizes wire based on its chemical composition and the type of finish. Common designations include:
Custom cold-headed components requiring high dimensional accuracy. Steel Grades and Chemical Composition jis g3539 pdf
Precision is vital for cold heading machinery. JIS G3539 outlines strict tolerances for wire diameter and ovality (out-of-roundness) to prevent jams in automated feed systems. Manufacturing Processes and Surface Treatments
Q: What is JIS G3539? A: JIS G3539 is a Japanese Industrial Standard that specifies the requirements for steel wires used in prestressed concrete structures.
High-strength structural screws, anchors, and rivets. | Grade | C (Carbon) | Si (Silicon)
For larger diameter wires, the wire is flattened to a specified height ratio. Surface must remain crack-free.
Understanding this Japanese Industrial Standard (JIS) helps engineers, manufacturers, and procurement specialists ensure material compatibility, structural integrity, and manufacturing efficiency. 1. Scope and Application of JIS G3539
Note: Always ensure you purchase or download the latest revision of the standard, as technical updates regarding environmental regulations or material testing criteria are periodically implemented. JIS G3539 outlines strict tolerances for wire diameter
The standard details specific test methods for tensile strength, reduction of area, and surface defects. The PDF serves as a reference for your QC lab.
The official storefront of the Japanese Standards Association.
In simpler terms: is the raw material; SWCH is the finished, ready-to-use input for the fastener production line.
