Just like steel can be strengthened by adding different elements, stainless steel (itself an alloy) can also be enhanced for various purposes. Some popular stainless steel alloys include austenitic, ferritic, and martensitic.
Martensitic steel, in particular, stands out for its unique crystal structure, which gives it impressive strength and the ability to be heat-treated for incredible hardness. These qualities make it a great choice for a variety of applications.
MG Metals have been working with stainless steel of all kinds for over 20 years, so we know the ins and outs of its best uses. Below, we’ll break down some of the specific applications where martensitic steel really shines.
1. High-Performance Cutting Tools
Martensitic stainless steel is a popular choice for making high-performance cutting tools, like knives, saw blades, and surgical instruments.
One of the standout benefits of martensitic stainless steel is its incredible hardness, which allows tools to achieve sharp, precise cutting edges. This hardness, combined with strong wear resistance, helps tools stay sharper for longer, meaning they don’t need re-sharpening as often. This is especially valuable for medical instruments that need to stay sharp and sterile, as martensitic stainless steel can handle frequent sterilisation without losing its edge.
Another great feature of martensitic stainless steel is its impressive corrosion resistance. This is a big plus in environments where tools are exposed to moisture, chemicals, or biological materials that could lead to rust – for example, culinary knives, which are often used in wet or acidic settings.
Example uses:
- Kitchen and utility knives
- Medical scalpels, scissors, and other precision tools
- Industrial saw blades
- Dental scalers and forceps
- Razor blades
- Shears
2. Industrial and Structural Fasteners
Martensitic stainless steel is also a popular choice for bolts, screws, and fasteners exposed to extreme conditions. It’s especially useful in fields like aerospace and marine engineering, where components often face intense mechanical stress, temperature changes, and corrosive environments.
Martensitic stainless steel’s resistance to wear means that fasteners can handle repeated mechanical stress without losing strength, which is crucial for uses where parts experience continuous loads or vibrations. Its high resistance to corrosion – especially against saltwater and harsh chemicals – also makes it perfect for environments where metals usually break down quickly. This durability extends the life of the fasteners and reduces the need for constant maintenance or replacements in critical settings.
Example uses:
- Bolts and nuts used in automotive engines, aeroplanes, and shipbuilding
- Heavy machinery and structural screws
- Threaded rods
- Studs
- Washers
- Pins and rivets
3. Turbine Blades and Compressor Parts
Turbine blades and compressor parts are key players in powering up our world, from energy plants to aeroplanes. They work under extreme conditions and need to handle intense mechanical stress, friction, and high temperatures – for example, turbine blades often operate in environments hotter than 500°C (932°F), while compressor parts endure repeated stress and constant heating and cooling. They need materials that are both sturdy and heat-resistant to perform as needed.
Martensitic stainless steel is an ideal choice for these demanding roles. Its durability and heat resistance allow it to keep its shape under pressure, helping turbine blades and compressor parts stay reliable for longer. This durability means less frequent maintenance, fewer part replacements, and greater efficiency, which can save valuable time and money.
Example uses:
- Turbine blades
- Compressor blades
- Compressor rotors
- Discs and shafts
- Casing components
- Bearing sleeves and seals
4. Automotive and Heavy-Duty Gears
Martensitic stainless steel is popular for automotive gears because it’s tough enough to handle strong impact forces and sudden load changes without breaking. This durability is essential for gears that need to perform reliably under a wide range of conditions, like high speeds, heavy loads, and temperature shifts.
Another benefit of martensitic stainless steel is its outstanding wear resistance, which helps the gears stand up to friction and abrasion over time, reducing wear. This is especially valuable in demanding environments, like off-road vehicles or construction equipment, where gears face rough conditions regularly.
Example uses:
- Transmission gears
- Differential gears
- Camshaft and crankshaft gears
- Turbocharger gears
- Steering gears
- Winch gears
- Industrial gearboxes
- Hydraulic pump gears
Choose MG Metals for All Your Stainless Steel Needs
Looking for high-quality stainless steel for your next project? At MG Metals, we specialise in a huge range of custom-cut stainless steel options, perfect for any industrial or creative need. Our selection includes:
- Martensitic
- Austenitic
- Ferritic
- Duplex
- Super duplex
Whether you need corrosion-resistant austenitic steel for tough conditions, durable martensitic steel for wear resistance, or the strength and corrosion resistance of duplex and super duplex options, we’ve got you covered.
Get a free quote online or give us a call on 01794 521070, and let us deliver the perfect custom stainless steel solution to bring your vision to life.