What Are Bolts Made Of?: The Materials and Applications
Bolts are an integral tool within the building industry for both professional builders and DIYers alike.
With various options available on the market, there’s an abundance of materials and types designed for different applications.
By paying attention to the small details, such as what materials are used to manufacture bolts, you can ensure that your purchase includes everything you need: safety, durability, and efficiency.
Stay with Efixings as we explore the different materials bolts are crafted from and what applications they’re best suited for.
The Common Materials Used in Bolts
The material composition of a bolt greatly impacts its durability in certain conditions and applications. One material may be suited for load-bearing installations, and another may not.
Understanding the uses and benefits of each type can help you make an informed decision.
Steel Bolts
Steel bolts are the most common choice for general structural work and DIY projects.
These bolts are strong and shock-resistant, providing long-lasting strength and durability. When placed in high-humidity conditions, they can resist moisture and chemicals, maintaining structural integrity.
This is a cost-effective option for budget-constraint applications.
Key applications
- Automotive tasks
- Construction work
- Machinery assembly
Stainless Steel Bolts
While similar to steel bolts, stainless steel has a few more benefits that outweigh the latter option.
Stainless steel is the better choice for load-bearing applications. It offers additional strength and is more resistant to corrosion. Its ability to withstand harsh weather makes it a strong choice for outdoor and hydraulic applications.
Stainless steel is resistant to high temperatures, so it doesn’t experience thermal expansion or contraction.
Key applications
- Marine environments
- Outdoor fixtures
- Food processing equipment
Titanium Bolts
Titanium bolts are lightweight, making them easy to work with. However, don’t be fooled by their delicate design; they offer exceptional strength.
As they’re around 45% lighter than steel, they are favoured for applications where weight is carefully controlled (especially for structures where fuel efficiency is crucial).
Titanium bolts are used for marine and medical applications because they are excellently resistant to salt water, chemicals, and chlorine, as well as non-toxic and biocompatible.
Key applications
- Aerospace
- Marine projects
- Medical equipment
- Sports equipment
Aluminium Bolts
Similar to titanium, aluminium bolts are lightweight, making them easy to handle and install.
These affordable fixings are more suited to lighter-duty applications, such as furniture assembly or small structures. Aluminium bolts are also beneficial for applications where weight reduction is vital.
When exposed to moisture, aluminium forms a protective oxide coating, resisting corrosion. However, it lacks the strength of steel.
Key applications
- Automotive parts
- Electronics
- Maritime applications
Brass Bolts
Brass is a durable alloy that is resistant to corrosion from harsh chemicals and moisture.
Its golden colour can be used for decorative purposes, enhancing the look of architectural features or furniture. Because of its high thermal conductivity, it is often used for industrial operations.
Brass is also water resistant, making it ideal for humid environments and outdoor applications.
Key applications
- Decorative fixtures
- Plumbing
- Electrical work
Coatings and Finishes for Added Durability
Many bolts are designed with added coatings and finishes for additional durability and added benefits.
Some of the most popular finishes include:
- Zinc plating: Zinc provides additional resistance to rust and corrosion. When added to bolts, it provides a protective layer between the steel and any moisture content. This is beneficial for automotive parts, general construction, and indoor applications.
- Galvanisation: Hot-dip galvanised bolts are dipped into molten zinc to create a thick, robust coating. This offers superior protection against corrosion and is often used for marine and outdoor applications.
- Anodising: This is an electrical process that converts an aluminium surface into a decorative, anodic oxide finish. This process hardens the metal surface and increases corrosion resistance. Anodised bolts are used for electronics and lightweight structures
- Nickel plating: This is common for applications where endurance and appearance are equally crucial since it provides a polished finish and exceptional corrosion resistance. Nickel-plated bolts are beneficial for home decor, furniture, and plumbing.
Find High-Quality Bolts for Your Projects at Efixings
For premium-quality bolts in various materials, browse our website and explore our range of durable, reliable bolts and fixings, perfect for any project.
We have everything for all of your construction needs.