Alloy Steel CNC Machining Services In China

At EJ CNC, we provide a wide range of alloy steel CNC machining services, including milling, turning, drilling, threading, and tapping, to meet the needs of our customers. We have a team of experienced and skilled engineers who are able to create high-quality alloy steel parts and custom alloy steel parts using the latest technology.
No matter what your alloy steel CNC machining needs are, we are here to help. Contact us today to get started on your project!

our capability for Alloy steel CNC machining


CNC Milling for Alloy Steel

Our company is proud to offer the highest quality alloy steel CNC milling capabilities. We have an experienced team of engineers and machinists who specialize in precision CNC machining of all types of alloy steel components. Our advanced CNC equipment allows us to create complex parts with tight tolerances, as well as intricate shapes and details that would be impossible to achieve with traditional methods. Whatever your needs may be, our team is here to help you get the job done right. 

CNC turning for Alloy Steel

CNC Turning for Alloy Steel

At our company, we take pride in our alloy steel CNC turning capability. We specialize in manufacturing parts with tight dimensional tolerances and complex geometries. Our CNC turning machines are equipped with the latest technology to ensure accuracy, speed, and efficiency. Our skilled engineers have extensive experience in machining a wide range of materials, including alloys such as stainless steel, aluminum, and titanium. With our state-of-the-art equipment and experienced personnel, we are able to produce parts that meet the highest standards of quality.

Common Alloy steel

Alloy steel 1.7131 is comprised of two primary elements: iron and carbon. The carbon content within the steel produces a microstructure known as pearlite, which is a combination of two minerals: ferrite and cementite. 

Alloy steel 1.7131 properties

Alloy steel 1.7225 is consisted of chromium, molybdenum, and vanadium as strengthening elements. This steel has good ductility and toughness. Therefore alloy steel 1.7225 is suitable for applications where high strength is required such as gears, shafts, connecting rods, bolts, etc.

properties alloy steel 1.7225

Alloy steel 1215 is made up of carbon, manganese, silicon, phosphorus, and sulfur. If you are looking for steel that is not only strong but also has a good amount of corrosion resistance, then alloy steel 1215 is the right choice. Alloy steel 1215 is easy to weld and can be machined without much difficulty.

properties of 1215

4140 steel is a high-strength chromium-molybdenum steel that can be heat-treated to a variety of desired properties. Its strength, hardness, and toughness make it ideal for use in a variety of applications, such as shafts, gears, pins, and bushings. 

Properties of 4140

4340 steel is a high-strength alloy steel that is commonly used in applications requiring superior strength and toughness. It is typically used in applications where strength and toughness are required.

Properties of 4340

Popular Alloy Steel Machined Parts

There are many different types of machined parts, each with its own unique purpose and function. 
Here are some alloy steel machined parts we provided for our clients: 
  • Alloy steel bolts usually used in large power plants 
  • Alloy steel gears used in wind turbines 
  • Alloy steel shafts for compressors and pumps 
  • Alloy steel valves used in oil and gas pipelines 
  • Alloy steel bearings for heavy machinery 
  • Alloy steel casting for mining equipment 
  • Alloy steel forgings for construction machinery 
  • Alloy steel welding wire and electrodes 
  • Alloy steel pipe fittings and flanges 
  • Alloy steel fasteners used in shipbuilding 
  • Alloy steel plate and sheet for pressure vessels 
  • Alloy steel screws for automotive applications
Why choose our services

Why choose our alloy Steel CNC machining Services?

quality control

We have a professional quality control team to strictly control the quality of products from raw materials to finished products, and have obtained ISO9001:2008 certification.


EJ CNC has been in operation for many years, with strong technical strength and rich experience.

product delivery

We have a professional logistics team to ensure that the products are delivered to you in a safe and timely manner.

after-sales service

We have a professional after-sales service team to provide you with timely and efficient after-sales service.

CNC machining tolerance of alloy steel

CNC machining tolerance is the amount of allowable variation in the dimensions of a part produced by a CNC machine. 
The tolerance of alloy steel for CNC machining is related to the alloying elements in the steel and their effects on the steel. 
We follow ISO 2768 standards for alloy steel machined by CNC. You can check the below chart for reference.
alloy steel tolerance

Surface Finishing Options for Alloy steel


Black oxide is applicable to alloy steels, and it is a conversion coating used to improve corrosion resistance and minimize light reflection.


Plating is a process often used to improve the appearance or functionality of alloy steel parts and it is often used for steel parts that need to be protected from wear and tear.


Polishing is often used to create a high-quality, mirror-like finish. It can also improve the functionality of the alloy steel part by reducing friction or making it easier to clean.  

powder coating

Powder coating is ideal for alloy steel parts that will be exposed to high temperatures or harsh chemicals. It is a strong, wear-resistant finish that is compatible with all metal materials.


Some alloy steels can have their properties significantly improved through carburizing. This process infuses the surface with additional carbon that improves its hardness and wear resistance.


Sandblasting is typically used to create a textured finish. This process can be used on alloy steel and it creates a rougher surface that can provide better grip or adhesion for paint and other finishes.


CNC machining steel is different from other materials in a few ways. First, steel is much harder than most other materials, so it requires more time and effort to machine. Second, steel is more likely to chip or break during the machining process, so it’s important to use high-quality tools and techniques.

CNC machining is often used to create parts for the aerospace and military industries because of the high precision required. CNC machining can also be used to create parts for the automotive, medical, and consumer goods industries.Some common applications for CNC machined alloy steel parts include:
  • Aerospace components
  • Military equipment
  • Automotive parts
  • Medical implants and devices
  • Consumer goods
Some advantages of CNC machining steel include the ability to produce very precise and detailed parts, the ability to replicate parts quickly and easily, and the fact that CNC machining can be done relatively inexpensively. Additionally, CNC machining steel can be done on a variety of different types of materials. 

Are you looking for a reliable Alloy Steel CNC machining service?

 Look no further than EJCNC. We invite you to take advantage of our reliable services and call us today for a free consultation so that we can help you meet your goals in a timely manner.

Get in touch with us now!