Custom Metal CNC Machining
FastPreci provides a wide selection of premium metal materials, including aluminum, steel, stainless steel, brass, copper, and specialized alloys. Meeting the needs of different projects for strength, corrosion resistance, and specialized physical properties, suitable for both precision components and large structural parts.
Advantages of CNC Metal Parts
High Strength and Durability
Metal CNC parts are known for their excellent mechanical strength and fatigue resistance, making them ideal for load-bearing and high-impact applications.
Superior Thermal and Electrical Conductivity
Metals like aluminum, copper, and brass offer excellent heat and electrical conductivity, which is critical for applications in electronics, automotive, and power systems.
Tight Tolerances and Precision
CNC machining of metals allows for extremely tight tolerances and consistent accuracy, which is crucial in industries like aerospace, medical, and robotics.
Wide Material Selection
From lightweight aluminum to high-strength steel and corrosion-resistant stainless steel, CNC metal machining supports a broad range of material options to suit various functional needs.
Versatile Surface Finishes
Metal parts can be easily post-processed with anodizing, plating, polishing, or powder coating, offering both aesthetic appeal and enhanced performance.
Cost-Effective for Prototypes and Production
CNC machining metal parts is highly efficient for both low-volume prototyping and high-volume production, reducing lead times and tooling costs.
Common Metal CNC Machining Materials
Aluminum is widely used in CNC machining for its light weight, high strength and corrosion resistance. It is suitable for precision machining and complex designs, and is commonly used in aerospace, automotive, electronics and medical devices. The main models are 6061, 7075, 2024, etc.
| Model | Density (g/cm³) | Tensile Strength (MPa） | Yield Strength (MPa） | Elongation (%) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Thermal Expansion (µm/m°C) |
| 6061 | 2.7 | 310-350 | 275-310 | 10-17 | 95 | 167 | 23.6 |
| 7075 | 2.81 | 510-570 | 430-480 | 5-11 | 150 | 130 | 23.5 |
| 2024 | 2.78 | 420-470 | 290-330 | 10-15 | 120 | 138 | 23.2 |
| 5052 | 2.68 | 228-260 | 193-210 | 12-20 | 60 | 138 | 23.8 |
| 5083 | 2.66 | 275-350 | 125-135 | 15-20 | 75 | 117 | 24.2 |
| 6063 | 2.7 | 190-240 | 150-215 | 8-12 | 70 | 200 | 23.5 |
Steel is widely used in CNC machining for its high strength, wear resistance and good machinability, suitable for tools, machine parts and structural supports in high stress environments. Commonly used models are such as 1018, 1045, 4140, etc.
| Model | Density (g/cm³) | Tensile Strength (MPa） | Yield Strength (MPa） | Elongation (%) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Thermal Expansion (µm/m°C) |
| 1045 (carbon steel) | 7.85 | 570-700 | 370-470 | 16-20 | 170 | 46 | 11.8 |
| A36 (structural steel) | 7.85 | 400-550 | 250-350 | 20-25 | 130 | 50 | 11.8 |
| 4140 (Alloy Steel) | 7.85 | 680-850 | 450-635 | 20-30 | 207 | 41 | 11.5 |
| 4340 (Alloy Steel) | 7.85 | 750-930 | 635-760 | 12-20 | 241 | 45 | 11.6 |
| SS304 (Stainless Steel) | 7.93 | 520-720 | 210-310 | 40-50 | 160 | 16 | 17.3 |
| SS316 (Stainless Steel) | 7.98 | 520-720 | 210-290 | 35-50 | 150 | 16 | 16.5 |
| ToolSteel | 7.85 | 900-1200 | 500-1000 | 5-10 | 400-700 | 30 | 11 |
Stainless steel is widely used in CNC machining for medical, food processing, automotive parts and building structures due to its excellent corrosion resistance, strength, heat resistance and machinability. Commonly used types such as 304, 316 and 17-4PH.
| Model | Density | Tensile Strength (MPa） | Yield Strength (MPa） | Elongation (%) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Thermal Expansion (µm/m°C) |
| SS304 | 7.93 | 520-720 | 210-310 | 40-50 | 160 | 16 | 17.3 |
| SS316 | 7.98 | 520-720 | 210-290 | 35-50 | 150 | 16 | 16.5 |
| SS310 | 7.9 | 520-750 | 210-310 | 40-45 | 170 | 20 | 17 |
| SS430 | 7.7 | 450-600 | 200-300 | 12-22 | 160 | 24 | 11 |
| SS17-4PH | 7.75 | 930-1100 | 600-750 | 10-12 | 300 | 16 | 12.8 |
| SS2205(Duplex) | 7.8 | 650-850 | 450-600 | 25-35 | 250 | 15 | 16.5 |
| SS446 | 7.8 | 450-600 | 200-300 | 15-25 | 200 | 20 | 14.5 |
Brass is often used in CNC machining to make highly corrosion-resistant, electrically and thermally conductive parts, such as plumbing fittings, electronic connectors and decorative parts. Its soft texture, anti-bacterial and wear-resistant, easy to process complex structures, and the finished product has an elegant golden appearance. Commonly used models include C360, C260 and C385.
| Model | Density (g/cm³) | Tensile Strength (MPa） | Yield Strength (MPa） | Elongation (%) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Thermal Expansion (µm/m°C) |
| C36000(Free-CuttingBrass) | 8.55 | 550-700 | 200-300 | 20-35 | 60 | 120 | 19.0 |
| C37700(CastingBrass) | 8.5 | 350-500 | 150-250 | 25-40 | 90 | 110 | 20.0 |
| C46400(NavalBrass) | 8.50 | 510-690 | 230-300 | 30-40 | 110 | 90 | 20.5 |
| C22000(YellowBrass) | 8.50 | 310-450 | 120-200 | 30-40 | 75 | 120 | 21.0 |
| C26000(MuntzMetal) | 8.55 | 420-600 | 170-250 | 30-40 | 85 | 120 | 21.2 |
| C90200(RedBrass) | 8.75 | 450-550 | 150-250 | 15-30 | 110 | 90 | 21.5 |
Bronze is widely used in CNC machining for marine fittings, bearings, gears and pumps and valves due to its excellent corrosion and wear resistance and high hardness properties. Its excellent anti-friction properties make it suitable for high loads and friction environments. Common types include C932, C954, C863, etc.
| Model | Density (g/cm³) | Tensile Strength (MPa） | Yield Strength (MPa） | Elongation (%) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Thermal Expansion (µm/m°C) |
| AluminumBronze,C95400 | 7.6-7.8 | 620-800 | 250-400 | 10-25 | 150 | 85 | 18.5 |
| PhosphorBronze,C51000 | 8.9 | 500-600 | 200-300 | 25-30 | 120 | 70 | 19.0 |
| TinBronze,C90700 | 8.8 | 400-600 | 150-250 | 15-25 | 100 | 60 | 19.5 |
| LeadedBronze,C93200 | 8.5 | 400-500 | 200-300 | 20-30 | 90 | 70 | 20.0 |
| BismuthBronze,C63000 | 8.7 | 500-700 | 250-350 | 15-30 | 120 | 80 | 20.2 |
Copper (pure copper) is widely used in electrical and electronic components, radiators, piping systems and other fields due to its excellent electrical and thermal conductivity and corrosion resistance. Copper is soft and easy to process, with high surface finish, suitable for high-precision machining. Commonly used models such as C110, C101 and so on.
| Model | Density (g/cm³) | Tensile Strength (MPa） | Yield Strength (MPa） | Elongation (%) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Thermal Expansion (µm/m°C) |
| C11000 (electrolytic copper) | 8.92 | 210-250 | 50-110 | 40-50 | 35-50 | 398 | 16.5 |
| C10200 (Oxygen-free copper) | 8.96 | 210-250 | 55-110 | 40-50 | 30-45 | 390 | 16.7 |
| C12000 (Copper Alloy) | 8.96 | 250-350 | 80-150 | 40-60 | 40-55 | 380 | 16.3 |
| C14500 (Phosphorus Copper) | 8.92 | 250-350 | 100-200 | 40-50 | 45-55 | 370 | 16.1 |
| C17500 (Beryllium Copper) | 8.25 | 900-1100 | 600-800 | 5-15 | 180-230 | 120 | 16.2 |
Titanium is widely used in CNC machining in aerospace, medical implants, and automotive high-performance parts due to its high strength, light weight, corrosion and heat resistant properties. Its high biocompatibility and strength-to-weight ratio make it particularly suitable for demanding applications, and commonly available models are Ti-6Al-4V (Grade 5) and Grade 2.
| Model | Density (g/cm³) | Tensile Strength (MPa） | Yield Strength (MPa） | Elongation (%) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Thermal Expansion (µm/m°C) |
| Grade2（CommerciallyPureTitanium） | 4.51 | 370-550 | 230-300 | 20-30 | 160-200 | 21.9 | 8.5 |
| Grade3 | 4.50 | 550-620 | 480-560 | 20-25 | 210-250 | 21.7 | 8.5 |
| Grade5（Ti-6Al-4V） | 4.43 | 900-1100 | 800-1000 | 10-15 | 330-350 | 7.6 | 8.6 |
| Grade5（Ti-6Al-4VELI）（ExtraLowInterstitial） | 4.43 | 1000-1200 | 900-1100 | 15-18 | 340-360 | 7.6 | 8.6 |
| Grade23（Ti-6Al-4VELI） | 4.43 | 860-1000 | 790-950 | 15-20 | 350-375 | 7.6 | 8.6 |
Magnesium metal in CNC machining is widely used in aerospace, automotive and electronic housings where weight reduction is in high demand due to its ultra-light mass, high strength and vibration damping properties. Magnesium alloys are easy to machine and are suitable for complex structures and high-precision parts, with common models such as AZ31, AZ91 and WE43.
| Model | Density (g/cm³) | Tensile Strength (MPa） | Yield Strength (MPa） | Elongation (%) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Thermal Expansion (µm/m°C) |
| AZ31B | 1.77 | 230-260 | 170-200 | 15-20 | 60-80 | 156 | 26.7 |
| AZ61A | 1.78 | 260-280 | 210-240 | 15-20 | 70-100 | 156 | 27.1 |
| ZK60A | 1.81 | 320-350 | 270-300 | 20-25 | 90-120 | 156 | 27.5 |
| WE43 | 1.80 | 380-400 | 310-350 | 18-22 | 100-130 | 130 | 26.0 |
| Elektron21 | 1.78 | 250-300 | 190-220 | 20-25 | 80-100 | 130 | 26.5 |
Zinc metal is widely used in CNC machining in the electronics, automotive and construction industries due to its excellent castability, corrosion resistance and economy. Zinc alloy has good impact resistance and dimensional stability, which makes it suitable for complex parts and thin-walled structures, and the commonly used models are Zamak3, Zamak5 and ZA-8, etc.
| Model | Density (g/cm³) | Tensile Strength (MPa） | Yield Strength (MPa） | Elongation (%) | Hardness (Brinell) | Thermal Conductivity (W/m-K) | Thermal Expansion (µm/m°C) |
| Zinc3(Z3) | 6.7 | 220-270 | 170-220 | 5-10 | 40-70 | 120 | 25 |
| Zinc5(Z5) | 6.9 | 250-280 | 190-220 | 10-15 | 50-90 | 120 | 25.2 |
| Zinc8(Z8) | 6.8 | 270-300 | 220-250 | 15-20 | 60-100 | 120 | 25.3 |
| ZA-12 | 7.1 | 380-420 | 290-330 | 5-10 | 85-120 | 130 | 25.6 |
| ZA-27 | 7.2 | 420-460 | 330-370 | 6-12 | 100-140 | 130 | 25.8 |
Metal CNC Machining Tolerances
We ensure precision in metal parts production with advanced CNC milling, turning, and multi-axis machining, achieving tight tolerances in various metals. We tailor our machining strategy to your tolerance and performance needs, whether for prototypes or production scaling.
Our cutting-edge equipment and stringent quality control enable us to deliver ±0.005 mm tolerances on critical features, ensuring components meet the highest accuracy, repeatability, and functionality standards.
| Parameter | Standard Tolerance | Tight Tolerance |
| Dimension | ±0.05 mm | ±0.01 mm |
| Hole Diameter | ±0.025 mm | ±0.005 mm |
| Flatness (100 mm) | 0.03 mm | 0.01 mm |
| Parallelism | 0.04 mm | 0.01 mm |
| Perpendicularity | 0.05 mm | 0.02 mm |
| Surface Roughness | Ra 3.2 μm | Ra 0.8 μm |
| Concentricity | ±0.02 mm | ±0.01 mm |
Metal CNC Machining for Various Industries
Medical
Surgical tools, dental implants, wear-resistant components.
Electronics
Insulators, chip carriers, substrates, precision fixtures.
Aerospace
Thermal shields, sensor housings, lightweight high-strength parts.
Industrial Equipment
Pump seals, bearings, cutting tools for harsh environments.
Energy
Electrical insulators, high-temperature components, fuel cell parts.
Automotive
Oxygen sensors, engine components requiring heat resistance.
Custom Metal Parts Finishing Options
We provide an extensive array of surface finishing solutions designed to enhance the durability, aesthetic appeal, corrosion resistance, and functional efficacy of your CNC machined metal components. Our offerings span from meticulous technical finishes to sophisticated cosmetic treatments, ensuring that your components are primed for production or direct application.
| Finishing Option | Description | Typical Applications |
| Anodizing (Type II/III) | Electrochemical process that enhances corrosion resistance and allows for coloring; available in matte or bright finishes. | Aluminum housings, heat sinks, aerospace parts |
| Bead Blasting | Creates a smooth, uniform matte texture and removes tool marks or burrs. | Consumer products, electronic enclosures |
| Powder Coating | Durable and colorful polymer coating providing impact and weather resistance. | Outdoor equipment, automotive parts |
| Plating | Adds a metallic layer for improved appearance, wear resistance, or conductivity. | Decorative surfaces, connectors, tools |
| Electropolishing | Electrochemical process to remove micro-defects, enhance smoothness, and improve corrosion resistance. | Medical components, food-grade parts |
| Precision Grinding | Achieves high dimensional accuracy and flatness with tight tolerances. | Tooling, sealing faces, mold components |
| Lapping & Polishing | Provides ultra-flat or mirror-like surfaces for functional or aesthetic purposes. | Optical interfaces, reflective parts |
| Brushing | Produces a directional satin finish by linear abrasion, often used for appearance. | Decorative panels, consumer hardware |
| Laser Marking | High-precision, non-contact method to engrave serial numbers, logos, or QR codes. | Product identification, branding, traceability |
Custom Metal Parts Gallery
Why Choose FastPreci for Metal CNC Machining?
Fast
Metal CNC parts delivered as fast as 3 days. We help accelerate your R&D cycles and keep your production on schedule, even with urgent deadlines.
Precision
Tolerances down to ±0.005 mm. Backed by advanced 5-axis CNC machines, mill-turn centers, and high-precision grinding, we meet the tightest tolerance demands across diverse geometries.
Cost-effective
We develop the most efficient machining strategies based on your functional and volume requirements. Combined with in-house production, we help you achieve the best balance of performance and cost.
One-stop Solution
From CNC milling to CNC turning, from precision grinding to surface treatment, from prototyping to production, easily and efficiently customize various ceramic parts.
Strict Quality Control
Certified to ISO 9001 standards and equipped with advanced inspection tools including Zeiss CMMs, we ensure consistent quality from first article to final batch.
Engineering Support
Our skilled engineering team offers end-to-end support, including material selection, DFM feedback, cost analysis, and design optimization — helping you turn ideas into manufacturable parts faster.
Metal CNC Machining Knowledge
