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
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.
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.
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.
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
3-axis, 4-axis, and full 5-axis simultaneous machining for complex geometries, contoured surfaces, and undercut features in TC4 titanium components.
Precision CNC lathe work including live-tooling mill-turn operations for cylindrical TC4 parts such as shafts, fittings, bushings, and threaded components.
Dimensional accuracy maintained within ±0.005 mm for critical features. Geometric tolerancing per ISO 2768 and customer-specific drawing callouts.
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.
Gun drilling and precision boring for deep holes up to 40× diameter in TC4 titanium, maintaining straightness, roundness, and surface finish integrity.
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
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.
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 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 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
Structural brackets, engine mounts, fasteners, actuator components, and airframe fittings machined from TC4 for weight reduction without compromising structural integrity at altitude.
Orthopedic implants, dental abutments, surgical instruments, and fixation hardware. TC4 offers proven biocompatibility, osseointegration capability, and MRI compatibility.
Propeller shafts, pump components, valve bodies, and subsea connector parts. TC4 resists saltwater corrosion and biofouling, extending service life in marine environments.
Connecting rods, valve train components, turbocharger parts, and suspension elements. TC4 reduces rotating mass, improving throttle response and mechanical efficiency.
Featured TC4 Machined Parts
Why Choose Our TC4 Machining Service
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.
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.
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.
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.
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.
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
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.
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.
Precision shafts, spindles, couplings, and drive components with tight concentricity requirements. Ground finishes available on bearing journals and sealing surfaces for reliable rotational performance.
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
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.
Contact profilometry and non-contact optical surface measurement ensure that machined TC4 surfaces meet specified Ra, Rz, and Rmax requirements on all functional areas.
Rockwell, Vickers, and Brinell hardness testing available depending on part geometry and specification requirements. Hardness verification confirms consistent material condition across production lots.
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.

We provide custom machined parts, 5-axis linkage CNC machining, and the design, production, and assembly of machinery and equipment.