Metal CNC Machining

Taidexing 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.

Get an Instant Quote

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

Aluminium

Steel

Stainless Steels

Brass

Bronze

Copper

Titanium

Magnesium

Zinc

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 (g/cm³)	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