Stainless Steel Bolts
Stainless steel bolts are often chosen for their corrosion resistance. They are highly popular for a wide range of applications in the aerospace and marine industries, as well as for applications in the commercial food industry. Stainless steel bolts are considered one of the best all-round fasteners because stainless steel, in addition to offering excellent corrosion resistance, provides good strength at a cost-efficient price.
There are several stainless steels from which to choose when considering which stainless steel bolts to purchase. The most commonly used stainless grades are 18-8 (basic stainless), 304 and 316. Which is best for your application? The higher the type number, the greater the corrosion-resistance. So, 18-8 stainless is less corrosion-resistant while 304 offers more resistance and 316 even more. As a result, 304 stainless steel bolts are considered good commercial grade fasteners while 316 stainless is considered marine grade because of its higher corrosion resistance to salt water and rust.
There are several things worth remembering about stainless steel bolts:
- The higher the type number the greater the corrosion resistance
- The greater the resistance to corrosion the lower the strength of the steel
- Stainless steel is a relatively poor electrical conductor, making stainless steel bolts a good choice for applications requiring low conductivity
While there are actually over two dozen grades of stainless steel, many are not used for fasteners – for example 420 and 440 stainless are popular knife blade steels. For the sake of simplicity, many fastener product professionals treat 18-8, 304, and A2 stainless grades are nearly identical and are often used interchangeably.
To learn more about stainless steel bolts, contact the stainless steel experts here at Electronic Fasteners. We can recommend the right stainless steel bolts for your specific application.