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Alloy Steel CNC Machining

Alloy steels contain other alloying elements along with carbon, resulting in improved solidity, toughness, fatigue and wear resistance.

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Alloy Steel CNC Machining

Alloy steel is one of the steel alloys containing different elements such as molybdenum, manganese, nickel, chromium, vanadium, silicon, and boron. These alloying components are included in increased stamina, solidity, wear resistance, and toughness. The amounts of alloying elements may range from 1 and 50%.

Alloy Steel Subtypes

Ultimate tensile strength Yield strength Young’s modulus (modulus of elasticity) Elongation at break Corrosion resistance Magnetism Weldability Application
Alloy Steel 4140 355 – 370 MPa 230 MPa 208 – 216 GPa 18 – 26 % Moderate to Poor Semi-Magnetic Moderate Heavy duty shafts Connecting rods High tensile bolts Learn More
Alloy Steel 4340 690 – 1080 MPa 470 – 630 MPa 205 – 213 GPa 15 – 22 % Moderate to Poor Semi-Magnetic Moderate High tensile applications General engineering parts Connecting rods & bolts Learn More

Alloy Steel CNC Machining Surface Finishes

Alloy Steel CNC Machining Gallery

Cost-saving Design Tips

Steel is one of the cheapest materials suitable for CNC machining. However, take care to avoid unnecessary machining costs. Below are some cost-saving design tips:

1.Material selection

Inexpensive though it may seem, it is necessary to select the best steel for your particular application. Utilizing high-strength alloy steel where moderate steel will certainly work increases costs for no included advantage.

2.Part setup

Designing a part to reduce the variety of machining setups can considerably reduce the cost of production. This is particularly true when machining low-cost materials as any cost savings on the material can be quickly removed by costly configurations.


Common alloys include 4140 and4340, known for their strength and toughness.

Yes, heat treatment can further enhance the mechanical properties of alloy steel parts.

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