Overview
Cold heading (also known as cold forging) involves applying pressure to metal wire at room temperature to form the rivet head. Unlike machining, which cuts through the grain structure and can create weak points, cold heading aligns the material's grain structure along the rivet's contours – reducing the risk of fatigue failure and enhancing durability.
As a direct manufacturer of rivets, we handle the entire process from bar stock to finished rivets-which gives us complete flexibility to tailor the chemical composition and dimensions to your specific application.
Key Features
| Feature | Benefit |
|---|---|
| High strength | Achieves tensile strength up to 400–500 MPa through cold heading work hardening |
| Continuous grain flow | Cold heading aligns grain structure along rivet contour, enhancing fatigue resistance |
| High purity | ≥99.8% Fe with ultra-low carbon and impurities |
| Excellent ductility | Rivet expands uniformly without cracking during setting |
| Custom head styles | Round, flat, countersunk or custom designs |
| Custom dimensions | Diameter 2–20mm, length 5–150mm – any size to your specification |
| Batch traceability | Full Certificate of Analysis with every shipment, matched to heat number |
| Surface options | As-forged, oil-coated, zinc-plated, phosphate-coated – you choose |
Quick Specifications
| Parameter | Value / Range |
|---|---|
| Purity (Fe) | ≥99.8% |
| Carbon (C) | ≤0.002% (ultra-low on request) |
| Sulfur (S) | ≤0.004% |
| Tensile Strength | 350–450 MPa (standard); 400–500 MPa (high-strength) |
| Diameter Range | custom on request |
| Length Range | custom |
| Head Styles | Round, flat, countersunk, truss, large flange, custom |
| Surface Finish | As-forged, oil-coated, zinc-plated, phosphate-coated |
| Standards | DT4, DT4C, ASTM A848, or custom chemistry |
Manufacturing Process
Raw material preparation – High-purity pure iron wire/bar
Cold heading – Precision cold forging at room temperature to form the rivet head
De-burring – Removal of sharp edges for safe and easy installation
Surface treatment – Optional oil coating, zinc plating, or phosphate coating
Quality inspection – 100% dimensional checks
Frequently Asked Questions
Q: What does "cold-headed" mean?
A: Cold heading (cold forging) forms the rivet head by applying pressure to wire at room temperature. This work-hardens the material and aligns the grain structure, resulting in stronger, more fatigue-resistant rivets.
Q: What is the minimum order quantity?
A: Flexible – from sample quantities to bulk orders. Contact us with your need.
Q: Can these rivets be used outdoors?
A: Pure iron rusts in humid environments. For outdoor service, we recommend zinc plating, phosphate coating, or other protective finishes.
Q: What is the typical lead time?
A： Standard sizes: 7–10 days. Custom designs: 12–15 days.
Q: Do you provide a Certificate of Analysis?
A: Yes. Every batch includes a COA with chemical composition and heat traceability.
Q: Q: Can I get a sample before placing a bulk order?
A: Yes – sample orders are welcome. Contact us with your specification.
Ready to order? Share your diameter, length, head style, finish, and quantity – we will deliver cold-headed pure iron rivets that combine high strength with the unique properties of pure iron.
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