Alloy steels

NeoNickel supply high quality alloy steel to businesses across Europe. Our highly skilled team of technicians can provide alloy steel in various product forms, cut to your specific needs.

Alloy steels (2)

Products: Flat Bar, Round Bar
Alloy type: Alloy Steels
4340 Alloy Steel
Products: Round Bar
Alloy type: Alloy Steels

What is alloy steel?

Steel is technically already an alloy, as it is made from iron and carbon. However, alloy steel must contain iron, carbon and one or more other alloying elements. The alloying element is chosen to give the alloy steel certain desired characteristics or physical properties. For example, to make it stronger, harder or more heat resistant.

Alloy steels might be categorised in a few different ways. We could group them according to the alloying element used, for example nickel, molybdenum or chromium. Most commonly though, we group alloy steels according to whether they are high alloy steel or low alloy steel. High alloy steel contains 8% or more alloying elements, whilst low alloy steel contains less than 8% alloying elements.

What are the properties of alloy steel?

The properties of alloy steel will vary depending on which alloying elements are used. Different alloying elements will introduce different properties. Here are the properties of the alloy steel available at NeoNickel.

NeoNickel supply 300M/S155 alloy steel. 300M/S155 is a low alloy steel containing chromium, manganese, molybdenum, nickel and silicon. These alloying elements combine to give it high strength and good fatigue resistance. 

NeoNickel also supply 4340 alloy steel. This is another low alloy steel containing chromium, manganese, molybdenum, nickel and silicon, but at slightly different percentages. It contains less silicon than 300M/S155, which means it is more ductile and less brittle. It is also high strength and heat resistant.

What is alloy steel used for?

Alloy steel is used in a wide variety of applications, from aviation to the nuclear industry. The application of each alloy steel will depend on the specific properties it has. For example, 300M/S155 alloy steel is high strength and fatigue resistant, so it is often used in gears and shafts for both aeroplanes and cars - after all, you don’t want those breaking. 4340 alloy steel is high strength and heat resistant, so it is often used in forged hydraulic systems (as well as the aerospace and automotive industry).

Benefits of Using NeoNickel Alloy Steel

  • Increased corrosion resistance
  • Better hardenability
  • Greater strength
  • Easy machinability
  • High or low-temperature stability
  • Improved ductility
  • Increased toughness
  • Better wear resistance

What’s the difference between stainless steel and alloy steel?

Stainless steel is just a specific type of alloy steel. It is a high alloy steel, which must contain 10.5% or more chromium. This high percentage of chromium makes it highly corrosion resistance, which it is best known for. It can also be combined with other alloying elements to enhance its properties further. So it is still an alloy steel, just its own distinct category of it.

Why choose NeoNickel alloy steel?

NeoNickel are trusted alloy steel suppliers to businesses across Europe. We have offices and manufacturing sites in various European cities, from Milton Keynes to Milan. With a diverse and qualified workforce that speaks a total of 8 different languages, we can ensure excellent customer service for all our clients.

We have obtained quality approvals from industry-leading names like Rolls-Royce, BAE Systems and Safran. Our sites are also subject to regular quality and compliance checks, which they pass with flying colours. We also encourage staff to undertake individual training courses in everything from product compliance to training on the latest machinery. This is how we ensure we offer the very best service.

Take a look at our alloys

Browse our collection of alloys on the NeoNickel website. Every alloy has its own data sheet available to download at the bottom of the page. This will tell you all the important information about this alloy, including its metal composition, properties and applications.

If you need help finding a specific alloy, want to learn more or place an order, contact your nearest NeoNickel office or email

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