Product Specification

304Cu S-Coated Stainless Steel Nail Wire

Product Introduction

TOPONE 304Cu stainless steel nail wire is designed for stainless steel nail, screw, bolt, and other fastener manufacturing processes that require cold forming.

The wire uses SUS 304Cu with a minimum 3% Cu and is supplied with a skin-pass and soap-coated surface. Copper-containing 304Cu is commonly selected for cold heading applications because its material characteristics are suited to stainless steel fastener forming.

Available diameters are 0.15–12mm, allowing buyers to specify wire according to nail dimensions, forming equipment, tooling, and finished-part requirements.

For production, material grade, wire diameter, mechanical condition, surface coating, and forming process should be confirmed together rather than selecting the wire by diameter alone.

Product Specifications

The applicable standard and mechanical properties should be confirmed according to the customer's required specification and forming process. TOPONE's current 304Cu cold-heading range is also listed at 0.15–12mm.

Why Choose 304Cu Nail Wire?

304Cu with Minimum 3% Copper

304Cu is a copper-containing austenitic stainless steel grade used in cold heading and stainless steel fastener manufacturing.

TOPONE's published material information lists 304Cu with Cu 3–4% under its cold heading wire specifications.

The copper content is particularly relevant when selecting stainless steel wire for cold forming, especially for screws, nails, bolts, and other components requiring substantial deformation.

S-Coated Surface for Cold Forming

Soap coating provides a lubricating surface condition for forming operations.

For cold heading or nail production, surface condition should be considered together with the forming equipment, die design, deformation level, and lubrication requirements.

The required coating condition should therefore be confirmed according to the actual production process.

Skin-Pass Processing

Skin-pass processing can be specified as part of the wire's surface and dimensional preparation.

For precision fastener production, buyers should confirm diameter tolerance, surface condition, mechanical properties, and applicable standard before production.

0.15–12mm Diameter Range

TOPONE's stainless steel wire range covers 0.15–12mm.

For nail and fastener production, the correct diameter should be selected according to the finished component dimensions, forming allowance, tooling, and production equipment.

Applications

Stainless Steel Nail Manufacturing

304Cu S-coated wire can be used for stainless steel nail production where the selected material and mechanical condition meet the forming requirements.

Screw Manufacturing

The wire can also be used for stainless steel screws produced through cold heading and subsequent threading or finishing processes.

Bolt and Fastener Production

304Cu wire can be specified for bolts, pins, studs, and other cold-formed stainless steel fasteners.

TOPONE's published 304Cu cold heading wire information lists screws, bolts, rivets, pins, studs, and other fasteners as typical applications.

How to Select 304Cu Nail Wire

1. Confirm the Material

Specify SUS 304Cu and the required copper content according to the applicable material standard.

2. Confirm Wire Diameter

Select the required diameter within the 0.15–12mm range.

For nail and screw production, diameter tolerance is also important because dimensional variation can affect forming and subsequent processing.

3. Check the Mechanical Condition

The required tensile strength, elongation, hardness, and other mechanical properties should be matched to the forming process.

TOPONE's published cold-heading data shows that mechanical requirements vary according to grade, diameter, and material condition.

4. Specify the Surface

For this product, the key surface specification is S-coated / soap-coated with skin-pass processing.

If the customer uses a different lubrication system or requires a bright surface, the surface condition should be confirmed before production.

5. Provide the Finished-Part Information

For a more accurate wire specification, buyers should provide:

• Nail or screw dimensions

• Wire diameter

• Forming method

• Number of forming stages

• Tooling requirements

• Required surface condition

• Mechanical requirements

• Applicable material standard

• Required coil weight

304Cu vs. Standard 304 Wire for Fasteners

304 and 304Cu belong to the austenitic stainless steel family, but they should not simply be treated as interchangeable materials.

304Cu contains copper specifically as part of its alloy composition and is commonly used in cold heading and fastener applications. TOPONE's published data identifies 304Cu as a specialized grade for stainless steel fastener production.

When choosing between 304 and 304Cu, the buyer should compare:

The final selection should follow the applicable material standard and actual forming process.

Technical Specification Checklist

Before purchasing 304Cu stainless steel nail wire, confirm:

FAQ

What is 304Cu stainless steel nail wire?

304Cu stainless steel nail wire is a copper-containing austenitic stainless steel wire used for manufacturing nails, screws, bolts, and other cold-formed fasteners.

What does Min. 3% Cu mean?

It means the specified 304Cu material contains a minimum copper content of 3%. TOPONE's published material data lists Cu at 3–4% for 304Cu.

What does S-coated mean?

S-coated refers to a soap-coated surface condition used to provide lubrication during forming and processing. The exact coating specification should be confirmed according to the customer's production process.

What is skin-pass processing?

Skin pass is a light finishing operation applied to wire to help control its surface and dimensional condition. The exact requirements should be specified according to the applicable standard and customer drawing.

What diameter range is available?

The current TOPONE specification for this stainless steel wire range is 0.15–12mm.

Can 304Cu wire be used for screws and bolts?

Yes. 304Cu is commonly used for stainless steel fastener manufacturing, including screws, bolts, rivets, and pins, when the grade and mechanical condition match the forming process.