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Steel CNC Service from MQJM

MQJM's Steel Material Grades

Steel 1018

Known for its excellent machinability and formability, 1018 steel—often classified as low-carbon or mild steel—is a popular choice in CNC machining. It offers great performance in forging, welding, and bending, making it ideal for components that demand precise shaping or repeated forming. This steel grade is frequently used for manufacturing pins, shafts, spindles, and rods. Additionally, 1018 is compatible with surface hardening treatments like carburizing, which enhances its wear resistance without affecting core ductility.

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4130 Steel

4130 steel is classified as an alloy steel because it contains higher levels of chromium and molybdenum compared to standard mild steels. Known for its exceptional strength and toughness, this material is also easy to machine and responds well to various heat treatment methods. Its excellent hardenability and fatigue resistance make it ideal for precision components subjected to high stress. Common applications include aircraft engine mounts, cutting tools like taps and drills, and other high-performance structural parts.

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4140 Steel

4140 steel is a low-alloy steel that offers improved performance over 4130 due to its higher carbon content. This enhanced chemical makeup increases its tensile strength, impact resistance, and overall toughness while maintaining good ductility. The presence of additional chromium also boosts its resistance to wear and corrosion. Thanks to its balanced mechanical properties, 4140 is widely used for demanding applications such as high-strength fasteners, precision spindles, and pressure-bearing components like thin-walled vessels.

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1045 Steel

1045 steel is a medium carbon steel known for its balanced composition, typically containing carbon, manganese, silicon, and trace amounts of sulfur or phosphorus. It is widely used in CNC machining due to its excellent strength, toughness, and wear resistance. This material performs well under mechanical stress and is ideal for components that require durability and moderate resistance to moisture. 1045 is a go-to choice for shafts, gears, axles, and other precision-machined parts in industrial applications.

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1215 Steel

Often referred to as free-machining steel, this grade contains elevated sulfur levels, which significantly improve its machinability. Commonly known as "screw machine stock," it is frequently used in high-speed automatic machining operations. While it offers excellent performance in turning, drilling, and threading processes, its weldability is quite limited. This steel is especially well-suited for manufacturing components like screws, studs, pins, and other parts that demand high machining efficiency and tight dimensional control.

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4340 Steel

4340 steel is a high-strength, low-alloy steel known for its exceptional toughness, wear resistance, and fatigue strength. It retains its mechanical properties even under elevated temperatures, making it ideal for demanding environments. Due to its excellent hardenability and durability, 4340 is commonly used in the production of heavy-duty parts such as gears, drive shafts, crankshafts, and other critical structural components in aerospace, automotive, and industrial equipment.

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Benefits of Steel Material for CNC Services

Steel is a widely used material in CNC machining services due to its outstanding mechanical properties and versatility. One of the key advantages of steel is its high strength-to-weight ratio, making it ideal for producing durable and load-bearing components across industries such as automotive, construction, heavy machinery, and tooling. Steel also offers excellent machinability in many of its grades, allowing for high-precision CNC milling, turning, and drilling with consistent dimensional accuracy. In addition, steel's ability to withstand heat and mechanical stress makes it suitable for parts operating under extreme conditions. CNC machining steel components can achieve tight tolerances and smooth surface finishes, which are essential in applications requiring reliability and high performance. Moreover, steel's adaptability allows it to be heat treated or surface coated to enhance hardness, wear resistance, or corrosion protection, depending on specific requirements. With a wide range of available alloys, CNC steel machining is a cost-effective and efficient solution for both prototyping and full-scale production. Choosing steel for CNC services ensures high-quality, long-lasting parts suitable for even the most demanding applications.

The Applications of Steel CNC Services

1. Heavy-Duty Mechanical Parts

CNC steel machining is widely used in the production of load-bearing components such as gears, shafts, couplings, and housings. Steel's high tensile strength and wear resistance make it ideal for demanding mechanical environments.


2. Automotive Powertrain & Chassis Components

In the automotive industry, CNC machined steel is essential for manufacturing engine blocks, transmission parts, suspension elements, and drive shafts. Steel ensures durability, performance, and structural integrity under stress.


3. Construction and Infrastructure Equipment

CNC steel machining supports the fabrication of critical structural parts used in cranes, bulldozers, and other heavy equipment. The robustness of steel allows it to endure extreme loads and harsh environmental conditions.


4. Tooling and Die Manufacturing

Steel is a key material in CNC machining for making molds, cutting tools, and industrial dies. Its hardness and thermal stability allow for precise and repeatable machining in high-volume production environments.

MQJM's Expertise in High-Performance Steel CNC Services

MQJM is a professional CNC machining service provider that fully leverages the unique properties of steel to deliver high-quality, precision-engineered components. Known for its high strength, excellent machinability, and wear resistance, steel is ideal for applications requiring durability and structural reliability. At MQJM, we match each project with the most suitable steel grade to ensure optimal performance and cost-effectiveness.


Our experienced engineering team carefully evaluates application requirements—such as load-bearing needs, environmental exposure, and dimensional tolerances—before recommending the right type of steel. From carbon steel for structural parts, alloy steel for high-strength applications, to stainless steel for corrosion resistance, MQJM provides expert material selection tailored to your CNC project.


Equipped with advanced 5-axis CNC machines, automated programming, and a rigorous quality control system, MQJM is capable of producing complex steel parts with tight tolerances and fast turnaround. Our deep understanding of steel properties allows us to optimize every stage of the CNC process, delivering reliable and consistent results across industries including aerospace, automotive, machinery, and energy.


By combining material expertise, technical innovation, and customer-focused service, MQJM is your trusted partner for precision CNC machining with steel.

FAQs About Steel CNC Services

What types of steel are commonly used in CNC machining?

CNC machining frequently uses carbon steel, alloy steel, and tool steel. Popular grades include 1018 (easy to machine), 1045 (higher strength), and 4140 (high toughness and wear resistance). Each type offers different mechanical properties for various industrial applications.

What industries use CNC machined steel components?

Is CNC machining steel more expensive than other materials?

What surface treatments can be applied to CNC machined steel parts?

How does steel respond to heat treatment after CNC machining?

We will follow your requirements and provide you with high quality CNC parts that exceed your expectations.
Contact Us
Building 10, Gongming Second Industrial Zone, 125 Minsheng Avenue, Guangming District, Shenzhen
Building 10, Gongming Second Industrial Zone, 125 Minsheng Avenue, Guangming District, Shenzhen
info@mqjmcnc.com +86-13717187399
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