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CNC Machining Alloy Steel Service

Alloy steel is a type of steel material whose properties are improved by adding other elements (such as chromium, nickel, molybdenum, vanadium, silicon and manganese) to the steel.

DEK specializes in machining all types of alloy steel, providing you with high precision custom alloy steel parts. Our advanced equipment and machining technology allows us to achieve tight tolerances of +/- 0.005 mm and complex geometries with superior surface finishes, making us a preferred partner of choice for a wide range of industries.



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Custom Alloy Steel Parts in CNC Machining

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Alloy steel refers to steel that has a certain proportion of other metal elements or non-metallic elements added to steel to change its physical, chemical and mechanical properties. It can be divided into low alloy steel and high alloy steel.

At DEK, we have advanced CNC milling machines, CNC lathes, laser cutting machines, EDM machines, etc. and professional machining technology. We specialize in machining various types of alloy steel, such as alloy steel 4140, 4340, 1215, 4130, A514 and 8620. Whether it is simple cutting or complex precision machining, DEK always meets your diversified needs.

In addition, you can also get high-quality surface treatment (plating, painting, powder coating, etc.) as well as tight tolerances at DEK. Our precision service ensures high-quality parts for industries such as machine building, automotive and aerospace, and is ideal for gears, bearings, engine parts, turbine blades, and more. If you want a one-stop shop for customized alloy steel parts, contact us now!

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Alloy Steel Material List

Alloy Steel 1215

Alloy Steel 1215 is not a common alloy steel. It is a resulfurized and rephosphorized steel known as free machining steel.

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Alloy Steel 4130

Alloy steel 4130 is a versatile and widely used material in CNC machining, particularly in the aerospace and automotive industries.

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Alloy Steel 4140

Alloy Steel 4140, also known as chromoly steel, is a versatile low-alloy steel that contains chromium, molybdenum, and manganese.

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Alloy Steel 4340

Alloy Steel 4340 belongs to the AISI 4000 series of steels, a heat-treatable, low-alloy steel with high strength and toughness.

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Alloy Steel 8620

Alloy steel 8620 is a low-alloy steel containing nickel, chromium, and molybdenum with high strength and toughness. It is a commonly used steel that can be carburized.

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Alloy Steel A514

Alloy steel A514 is a cost-effective, high-performance material known for its strength, weldability, and toughness, especially in low temperatures.

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Basic Knowledge of Alloy Steel

What is Alloy Steel?

Alloy steel is a type of steel that contains additional elements such as manganese, silicon, nickel, copper, chromium, and others in varying proportions to enhance its properties. It is an iron-based material that can be categorized based on major alloying elements or the percentage of all alloying elements present. These alloys improve the steel's strength, hardness, corrosion resistance, and other characteristics.

It has two types– low alloy steel and high alloy steel. Low alloy steels contain small amounts of alloying elements (usually less than 5%), such as nickel, chromium, molybdenum, and manganese. On the other hand, high alloy steels contain higher amounts of alloying elements, often more than 5%. Examples of high alloy steels include stainless steels with high chromium content or tool steels with added tungsten and vanadium for improved hardness and wear resistance.

Advantages of Alloy Steel

High strength

Excellent toughness

Good wear resistance

Corrosion resistance

Heat resistance

Versatility in applications


Applications of Alloy Steel

Automotive parts

Aircraft components

Construction equipment

Oil and gas pipelines

Pressure vessels

Power generation turbines

Springs and coil springs

Cutlery and blades



Machining Alloy Steel Buying FAQ

Alloy steel is made by adding specific alloy elements to steel, refining by blast furnace ironmaking or electric furnace steelmaking, alloying treatment, vacuum degassing or electroslag remelting, continuous casting or die casting, and heat treatment processes such as quenching, tempering, annealing, and finally rolling, forging and machining to make steel with excellent characteristics such as high strength, wear resistance, corrosion resistance and high temperature performance.
Alloy steel is generally stronger than aluminum; it has higher tensile and yield strength.
Alloy steel is less prone to breaking than other materials due to its strength and durability.
Alloy steel is not recommended for cooking due to its composition and potential reactions with food. Stainless steel is a safer option for cookware.
Yes, alloy steel can be welded, but the specific welding process and precautions depend on the alloy's composition and intended application.

Other Materials



Bronze is a copper-tin alloy with good castability and excellent wear resistance, corrosion resistance and chemical stability. And it is one of the most important metals in manufacturing different products.

More info about Bronze


Brass pairs well with various styles. Mixing it with natural materials can create a balanced and sophisticated look. Experiment with different textures for a stylish combination.

More info about Brass
Aluminum-cnc-machine parts


Aluminum is one of the most commonly used metals in the world because of its excellent strength-to-weight ratio, low cost, and recyclability.

More info about Aluminum

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