Custom precision CNC machining TC4 titanium parts in China

Precision-engineered TC4 titanium alloy components manufactured to your exact specifications through advanced multi-axis CNC machining processes.

TC4 titanium alloy, internationally recognized as Ti-6Al-4V, is the most widely used titanium grade across aerospace, medical, marine, and high-performance engineering sectors. Our facility specializes in custom CNC machining TC4 titanium parts in China, delivering components that balance exceptional strength-to-weight ratio with outstanding corrosion resistance and biocompatibility. Every project is handled from raw billet to finished part under strict process control, ensuring dimensional accuracy, surface integrity, and repeatable quality for both prototype and production quantities.

From single prototypes to volume batches, we offer custom CNC machining TC4 titanium parts in China with tight tolerances down to ±0.005 mm, multi-axis contouring, and advanced surface finishing options. Our machining strategies are optimized for titanium's unique thermal and mechanical characteristics, reducing tool wear, preventing work hardening, and achieving superior surface finishes without compromising material properties.


TC4 Titanium Alloy at a Glance

Alpha-Beta Microstructure

TC4 belongs to the alpha-beta class of titanium alloys, providing a balanced combination of strength, ductility, and fatigue resistance. The dual-phase structure enables heat treatment optimization for specific application requirements.

Exceptional Strength-to-Weight Ratio

With a tensile strength exceeding 895 MPa and a density of only 4.43 g/cm³, TC4 delivers performance comparable to many steels at approximately 45% less weight, making it ideal for weight-critical designs.

Superior Corrosion Resistance

The naturally forming titanium dioxide passive layer provides excellent resistance to saltwater, chlorides, acids, and industrial chemicals. TC4 components perform reliably in marine, chemical processing, and biomedical environments.

Wide Operating Temperature Range

TC4 maintains mechanical stability from cryogenic temperatures as low as -200°C up to 400°C in continuous service, with short-term exposure capability up to 500°C for aerospace and engine-adjacent applications.

Chemical Composition of TC4 (Ti-6Al-4V)

Element Typical Content (wt%) Range (wt%) Function in Alloy
Titanium (Ti) 89.0 – 91.0 Balance Base metal; provides lightweight matrix and corrosion resistance
Aluminum (Al) 6.0 5.5 – 6.75 Alpha-phase stabilizer; enhances strength and oxidation resistance
Vanadium (V) 4.0 3.5 – 4.5 Beta-phase stabilizer; improves ductility and heat treatment response
Iron (Fe) 0.10 ≤ 0.30 Incidental impurity; controlled to maintain toughness
Oxygen (O) 0.12 ≤ 0.20 Interstitial element; contributes to strength but reduces ductility if excessive
Carbon (C) 0.03 ≤ 0.08 Residual impurity; kept low to preserve weldability and toughness
Nitrogen (N) 0.02 ≤ 0.05 Interstitial element; low limits ensure adequate ductility
Hydrogen (H) 0.005 ≤ 0.015 Tightly controlled to prevent hydrogen embrittlement

Composition values are typical for annealed TC4 bar and billet stock used in CNC machining. Actual values may vary within standard specification limits depending on mill source.


CNC Machining Capabilities for TC4

Multi-Axis CNC Milling

3-axis, 4-axis, and full 5-axis simultaneous machining for complex geometries, contoured surfaces, and undercut features in TC4 titanium components.

CNC Turning & Mill-Turn

Precision CNC lathe work including live-tooling mill-turn operations for cylindrical TC4 parts such as shafts, fittings, bushings, and threaded components.

📑 Tight Tolerance Control

Dimensional accuracy maintained within ±0.005 mm for critical features. Geometric tolerancing per ISO 2768 and customer-specific drawing callouts.

📏 Thread Milling & Tapping

Thread milling and form tapping of internal and external threads in TC4, including metric, UN, Whitworth, and custom thread profiles from M1.6 to M64 and larger.

🔧 Deep Hole Drilling & Boring

Gun drilling and precision boring for deep holes up to 40× diameter in TC4 titanium, maintaining straightness, roundness, and surface finish integrity.

🛠 Surface Finishing Services

Bead blasting, anodizing, passivation, polishing, and precision grinding to achieve specified surface roughness from Ra 0.2 μm to Ra 3.2 μm on machined TC4 surfaces.


International Designation Equivalents for TC4

TC4 is the Chinese national standard designation for the Ti-6Al-4V titanium alloy. When sourcing custom CNC machining TC4 titanium parts in China, it is essential to understand the equivalent grade designations across different international standards to ensure material traceability and specification compliance for your region.

Standard / Region Designation Equivalent / Notes
China — GB/T 3620.1 TC4 National standard titanium alloy; primary designation used in Chinese manufacturing
USA — ASTM B348 / AMS 4928 Grade 5 / Ti-6Al-4V The most common titanium grade in aerospace and industrial applications worldwide
Europe — EN 10204 / DIN 17851 3.7164 / TiAl6V4 European material number system; identical chemical and mechanical requirements
Japan — JIS H 4600 TAP-6400 / Class 60 Japanese Industrial Standard designation; widely used in Asian manufacturing
Russia — GOST 19807 VT6 (ВТ6) Russian federation standard; equivalent alpha-beta titanium alloy
UK — BS 2TA10 / BS TA11 IMI 318 / TA10 British Standard aerospace material designation for Ti-6Al-4V
France — AIR 9182 T-A6V French aerospace standard; identical composition and heat treatment response
International — ISO 5832-3 Ti6Al4V ISO designation for surgical implant applications; same alloy composition

All equivalent designations refer to the same nominal composition of Ti-6Al-4V. Minor variations in impurity limits may apply depending on the specific standard and product form. Material certificates traceable to the originating mill are provided with every order.


Mechanical Properties of Machined TC4

💪 Tensile Strength (Rm)

Minimum 895 MPa in annealed condition, with values up to 1000 MPa achievable through controlled solution treatment and aging. This ensures reliable performance under high-stress service conditions.

📊 Yield Strength (Rp0.2)

Minimum 825 MPa offset yield strength, providing excellent resistance to permanent deformation. The high yield-to-tensile ratio indicates superior elastic recovery compared to many structural metals.

🔬 Elongation & Ductility

Elongation at break of 10% minimum (typically 12–15%), demonstrating sufficient ductility for forming operations, thread engagement, and resistance to crack propagation under cyclic loading.

📜 Hardness & Density

Hardness of 33–36 HRC (approximately 320–350 HV) with a density of 4.43 g/cm³. The combination of moderate hardness and low density enables high-performance designs with minimal mass penalty.


Where TC4 Machined Parts Perform

Aerospace & Aviation

Structural brackets, engine mounts, fasteners, actuator components, and airframe fittings machined from TC4 for weight reduction without compromising structural integrity at altitude.

Medical & Surgical

Orthopedic implants, dental abutments, surgical instruments, and fixation hardware. TC4 offers proven biocompatibility, osseointegration capability, and MRI compatibility.

Marine & Offshore

Propeller shafts, pump components, valve bodies, and subsea connector parts. TC4 resists saltwater corrosion and biofouling, extending service life in marine environments.

Motorsport & Automotive

Connecting rods, valve train components, turbocharger parts, and suspension elements. TC4 reduces rotating mass, improving throttle response and mechanical efficiency.


Featured TC4 Machined Parts

Threaded TC4 titanium fitting machined by CNC turning
Precision threaded TC4 titanium fitting produced by CNC turning.
TC4 titanium positioning part for mechanical equipment
Machinery positioning component machined from TC4 titanium alloy.
TC4 titanium turning and milling combined part
Titanium turning and milling part combining multiple machining operations.

Why Choose Our TC4 Machining Service

📍 Titanium-Specific Toolpath Strategy

Optimized cutting parameters including reduced cutting speeds, controlled feed rates, and trochoidal milling paths tailored for TC4's low thermal conductivity and high chemical reactivity.

📓 Full Material Traceability

Every batch of TC4 raw material is documented with mill test certificates showing heat number, chemical analysis, and mechanical test results. Part-level traceability is maintained throughout production.

🔢 In-Process Thermal Management

Dedicated high-pressure coolant systems, MQL (minimum quantity lubrication) options, and thermal compensation strategies prevent overheating and work hardening during extended machining cycles on TC4.

📚 DFM Feedback & Consultation

Design-for-manufacturability review included at no extra cost. Receive recommendations on wall thickness, corner radii, thread engagement, and feature accessibility to optimize your TC4 part design.

🔊 Flexible Lot Sizes

Single-piece prototypes, low-volume bridge production, and full-scale batch manufacturing all supported. Tooling is designed for efficient changeover between part numbers within the TC4 material family.

🔒 Consistent Repeatability

SPC (Statistical Process Control) monitoring on critical dimensions ensures that every part in your order meets the same tolerance band. First-article inspection reports provided with production runs.


Common TC4 Parts We Machine

🔧 Fasteners & Threaded Components

Custom bolts, screws, nuts, studs, and threaded inserts in TC4. Precision thread profiles with rolled or machined threads depending on strength requirements and application environment.

🔰 Housings & Enclosures

Protective housings, sensor enclosures, and instrument cases machined from solid TC4 billet. Thin-wall capability down to 0.5 mm with consistent wall thickness control for weight-sensitive electronic packaging.

🔪 Shafts & Rotating Components

Precision shafts, spindles, couplings, and drive components with tight concentricity requirements. Ground finishes available on bearing journals and sealing surfaces for reliable rotational performance.

🔩 Brackets & Structural Fittings

Custom brackets, mounting plates, flanges, and structural joints machined from TC4 for load-bearing applications where weight reduction and corrosion resistance are primary design drivers.


Inspection & Verification Methods

📧 CMM Dimensional Verification

Coordinate measuring machine (CMM) inspection with automated probing routines verifies critical dimensions against CAD models. Full dimensional reports available in standard formats for every machined TC4 part.

📑 Surface Roughness Measurement

Contact profilometry and non-contact optical surface measurement ensure that machined TC4 surfaces meet specified Ra, Rz, and Rmax requirements on all functional areas.

🔬 Hardness Testing

Rockwell, Vickers, and Brinell hardness testing available depending on part geometry and specification requirements. Hardness verification confirms consistent material condition across production lots.

🛡 Visual & NDT Inspection

Visual inspection per applicable standards, supplemented by dye penetrant testing (PT) and ultrasonic testing (UT) where specified. Ensures surface and near-surface integrity of machined TC4 components.


Ready to Machine Your TC4 Parts

Whether you need a single prototype bracket or a production run of precision threaded fasteners, our team has the expertise, equipment, and material knowledge to deliver custom CNC machining TC4 titanium parts in China that meet your performance and quality expectations. Every project benefits from titanium-specific machining strategies, documented material traceability, and thorough inspection reporting.

Send your drawings, 3D models, or even rough sketches — we will provide a detailed manufacturability review, tolerance analysis, and a competitive quotation for your custom CNC machining TC4 titanium parts in China project. Our engineering team is available to discuss material alternatives, heat treatment options, and surface finishing requirements to optimize your design for titanium.