Are Staples Stainless Steel? 

Staples are the unsung heroes of the fastening world, holding our world together in the quiet corners where nails and screws can't quite reach. However, for those who take woodworking or upholstery seriously, choosing between materials can be the difference between longevity and regret. One crucial question is whether staples are made of stainless steel and can resist the telltale signs of oxidation — rust. 

Here's everything you need to know about the materiality of your staples and what to consider when choosing the right ones for your next project.

Do Stainless Steel Staples Rust?

Stainless steel is an alloy primarily made of iron and chromium. The addition of chromium gives the metal unique properties, making it highly corrosion-resistant. Staples come in various materials, including steel, copper, aluminum, and galvanized. 

However, the most common type is stainless steel staples. These rust-resistant fasteners offer significant advantages over other materials.

Stainless steel is often lauded for its resistance to rust and corrosion, but that doesn't mean all stainless steel is created equal. Regarding staples, two common grades stand out: 304 and 316. These grades are the best for stainless steel performance. They contain more chromium and nickel, making them more corrosion-resistant. Regular carbon steel and lower grades of stainless steel are not as resistant to corrosion.

Understanding the Grading System

The American Society for Testing and Materials (ASTM) has standardized a categorization system for different steel alloys based on their chemical composition, extending to stainless steel. Grade 304, which may be more prone to rusting than 316, is still highly resistant to other materials due to its 18-8 composition. The 18-8 in 304 stainless steel means the alloy meets a minimum of 18% Chromium and 8% Nickel.

On the other hand, 316 stainless steel contains molybdenum, an element not present in 304. It further increases its ability to withstand pitting and crevice corrosion, making it ideal for marine or chloride-rich environments. 

Both grades of stainless steel staples are durable and versatile for various fastening needs. However, the environment and specific application will help dictate the right grade.

What Factors Contribute to Rusting?

While stainless steel staples boast corrosion resistance, they are not entirely impervious to rust, especially if used in corrosive environments without proper care. Factors like exposure to chloride (saltwater or chlorinated environments), scratches or dents in the steel's protective oxide layer, and high temperatures can lead to rusting. 

To ensure the longevity of your stainless steel staples, it's important to consider what kind of environment they'll be subjected to and any potential risks.

Staples on Steel? A Potential Problem

It's vital to clarify that staples are generally limited to wood. Trying to staple into steel using a staple gun designed for wood can be dangerous, likely damaging the staple gun and causing injury. Staples are specifically crafted for particular applications, and using them unintendedly can lead to poor performance and safety hazards. 

Not to worry, however. For all your wood fastening needs, there are suitable stainless steel options. One particularly well-known series is the Arrow T50, a staple synonymous with quality and efficiency. It is available in stainless steel and galvanized staple options, with the latter being the most common choice for many users.

We Supply All Your Fastening Needs

At FastenerUSA, we provide a wide range of staples to meet all your fastening needs. We understand the importance of choosing the right material for your project, so we offer various grades of stainless steel staples for different applications.

Whether you need staples for marine applications or general woodworking projects, our extensive selection has you covered. So next time you need staples, choose FastenerUSA for quality and reliable products. Browse through our inventory and get free delivery.