Custom Steel CNC Machining Services in China
High-Strength, Durable, and Precision-Machined Steel Components for Demanding Applications.
- ISO 9001 Certified
- Alloy, Carbon & Tool Steels
- In-House Heat Treatment & Finishing
Your Expert Partner for Steel Machining
Celerity Precision is a premier manufacturer in China specializing in the CNC machining of steel and its alloys. Steel is the material of choice for applications where strength, toughness, and durability are the most critical requirements. From robust industrial machinery components to high-stress automotive parts, steel provides unparalleled performance and cost-effectiveness. Our factory is equipped with powerful CNC milling and turning centers and the expertise to effectively machine a wide range of steel grades. We transform raw steel stock into precision components that are built to last, meeting the most rigorous industrial standards.
Why Choose Steel for Your Machined Parts?
Steel offers an unmatched combination of mechanical properties and value, making it one of the most widely used engineering materials in the world. Its high tensile strength and wear resistance make it ideal for creating parts that can withstand extreme loads, high pressures, and abrasive conditions. At Celerity Precision, we have deep expertise in machining various steel alloys. We utilize rigid, high-torque CNC machines, specialized cutting tools, and optimized parameters to cut, mill, and turn this tough material into components with exceptional accuracy and precision.
Exceptional Strength & Toughness
Provides very high tensile and yield strength, capable of withstanding extreme loads and impacts.
Superior Hardness & Wear Resistance
Can be heat-treated to achieve very high hardness levels, making it ideal for high-wear components.
Cost-Effectiveness
Carbon steel offers an excellent strength-to-cost ratio, making it a highly economical choice for a vast range of parts.
Material Versatility
A huge range of alloys are available, allowing properties to be tailored for specific needs (e.g., strength, machinability, hardenability).
Weldability
Most common steel grades are easily weldable, enabling the creation of complex and robust fabrications.
Magnetic Properties
Its ferromagnetic nature is essential for applications involving magnets, sensors, and electromagnetic components.
1018 Steel (Low Carbon Steel)
A general-purpose, low-carbon steel with good machinability and excellent weldability. It is a cost-effective choice for parts that do not require high strength.
| Tensile Strength, Yield (MPa) | 440 MPa |
| Elongation at Break (%) | 15% |
| Hardness (Brinnell) | 126 |
| Density (g/cm³) | 7.87 |
1045 Steel (Medium Carbon Steel)
A popular medium-carbon steel that offers higher strength and hardness than 1018. It can be heat-treated to further increase its strength.
| Tensile Strength, Yield (MPa) | 625 MPa |
| Elongation at Break (%) | 16% |
| Hardness (Brinnell) | 179 |
| Density (g/cm³) | 7.87 |
4140 Steel (Alloy Steel)
A versatile chromium-molybdenum alloy steel known for its good toughness, strength, and wear resistance. It responds very well to heat treatment.
| Tensile Strength, Yield (MPa) | 655 MPa |
| Elongation at Break (%) | 25.7% |
| Hardness (Brinnell) | 197 |
| Density (g/cm³) | 7.85 |
A36 Steel (Structural Steel)
A common structural steel with good strength and excellent weldability, often used for frames, base plates, and structural applications.
Tensile Strength, Yield (MPa) | 400-550 MPa |
Fatigue Strength (MPa) | 150 MPa |
Elongation at Break (%) | 20% |
Hardness (Brinnell) | 119-159 |
Density (g/cm³) | 7.85 |
Surface Finishing Options for Steel
Because steel is susceptible to rust, a protective finish is required for nearly all applications. We offer a full range of durable and protective coatings.
As Machined
The raw machined surface. This is only suitable for parts used in a non-corrosive environment or that will be finished later. Steel will rust quickly.
Black Oxide
A chemical conversion coating that provides mild corrosion resistance and a deep black finish with no dimensional change.
Zinc Plating
A common and cost-effective sacrificial coating that provides excellent corrosion protection.
Powder Coating
A very tough and durable decorative finish that offers superior protection against corrosion, chemicals, and abrasion.
Painting
Offers an unlimited range of colors and provides good protection when applied over a proper primer.
Electroless Nickel Plating
Provides a uniform layer of hard, wear-resistant, and corrosion-resistant nickel.
Heat Treatment
A thermal process (not a finish) to increase the hardness and strength of the steel. Often followed by a protective finish.
Pros and Cons of Steel CNC Machining
Pros
- High Strength and Durability: The primary advantage, making steel the best choice for parts under high stress.
- Excellent Value: Carbon steel provides a very high level of performance for its cost.
- Hardenability: Can be heat-treated to achieve exceptional hardness and wear resistance.
- Vast Alloy Selection: An enormous range of alloys exists to meet specific engineering needs.
- Good Weldability: Most steels are easy to weld, enabling complex fabrications.
Cons
- Susceptible to Rust: Steel will rust easily and requires a protective coating for almost all applications.
- Heavy Weight: It is a very dense material, which is a major drawback for weight-sensitive applications in aerospace or automotive racing.
- Difficult to Machine: Steel is tougher and harder to machine than aluminum or brass, which can lead to longer cycle times and higher costs.
- Lower Thermal Conductivity: Not a good choice for applications that require rapid heat dissipation, such as heat sinks.
Applications of CNC Machined Steel Parts
Industrial Machinery
Gears, shafts, spindles, machine frames, and fixtures.
Automotive
Drivetrain components, suspension parts, axles, and brackets.
Tooling & Molds
Molds, dies, jigs, and fixtures made from tool steels.
Aerospace
High-strength landing gear components and structural fittings.
Energy
Components for oil and gas drilling, valves, and turbine parts.
Robotics & Automation
Structural components, actuator mounts, and end-effectors.
Steel Machining FAQ
What is the main difference between carbon steel and alloy steel?
Carbon steel’s properties are primarily defined by its carbon content. Alloy steel contains additional alloying elements (like chromium, molybdenum, nickel) to improve properties like hardness, toughness, and corrosion resistance.
Will my steel parts rust?
Yes, if left uncoated, any carbon or alloy steel will rust when exposed to moisture. A protective finish like zinc plating or powder coating is essential.
What is "heat treatment"?
It is a process of heating and cooling steel under controlled conditions to alter its internal crystal structure, which significantly increases its hardness and strength.
Why is steel harder to machine than aluminum?
Steel has higher strength and hardness, which requires more powerful machines, tougher cutting tools, and slower cutting speeds to machine effectively.
What is the difference between 1018 and 1045 steel?
1045 has a higher carbon content than 1018, which makes it stronger and harder, and allows it to be heat-treated to a much higher hardness. 1018 is softer and better for welding.
Can you machine parts that are already hardened?
Yes, this process is called “hard machining” or “hard milling.” It requires very rigid machines and specialized cutting tools, and it is a capability we offer for high-precision work.
What is the most common finish for steel parts?
For industrial parts, zinc plating is very common due to its low cost and good corrosion protection. For parts requiring a cosmetic finish, powder coating is a popular choice.
How do I specify a steel alloy and its condition on my drawing?
Be specific. For example, “Material: 4140 Alloy Steel, Heat Treat to HRC 30-34” or “Material: 1018 Carbon Steel.”