4mm Titanium Rod – Grade 5 Ti-6Al-4V Round Bar for Industrial & Medical Applications

Baoji Huacan's 4mm titanium rod is precision-rolled from Grade 5 Ti-6Al-4V and commercially pure grades, delivering tensile strength exceeding 895 MPa with a density of just 4.51 g/cm³ — 45% lighter than 316L stainless steel. Compliant with ASTM B348 and AMS 4928, each rod features a stable TiO₂ passive oxide layer for outstanding corrosion resistance. With 10+ years of titanium machining experience, 40+ CNC machines, and 1,000+ tons of annual capacity, we support OEM/ODM orders from prototype to mass production.

Why Choose Our 4mm Titanium Rod

When you need a small-diameter rod that performs under extreme conditions, material quality and dimensional precision are everything.

Our rods are produced using advanced centerless grinding and precision rolling, achieving ISO h7–h9 tolerances with diameter deviation within ±0.03mm. This makes them ideal for Swiss CNC machining where guide bushing fit is critical.

Every batch is traceable back to raw material ingots. You receive full material traceability, inspection reports, and certificates — so your procurement team has complete documentation confidence.

Parameter	Details
Material Grade	Grade 2 (TA2), Grade 5 (Ti-6Al-4V), Grade 7, Grade 9, Grade 23 (Ti-6Al-4V ELI)
Diameter	4 mm (Custom diameters available)
Length	Customized according to customer requirements
Dimensional Tolerance	ISO h7 / h8 / h9 (ISO 286); ±0.03 mm or better available
Tensile Strength	Grade 5: ≥895 MPa; Grade 2: Approx. 345 MPa
Density	Approx. 4.51 g/cm³
Elastic Modulus	Approx. 110 GPa
Surface Finish	Centerless Ground, Natural Titanium Finish, Polished, Anodized, PVD Coating
Surface Roughness	Ra <0.8 μm (Centerless Ground)
Straightness	≤1 mm/m deviation
Material Standards	ASTM B348 / ASTM F136 / AMS 4928

· High strength-to-weight ratio — Grade 5 exceeds 895 MPa UTS while being 45% lighter than steel

· Self-healing oxide layer — TiO₂ passive film reforms automatically in oxygen-rich environments

· Non-magnetic — Safe for MRI environments and sensitive electronic assemblies

· Low thermal conductivity — Approximately ¼ that of iron, beneficial in thermal-isolation assemblies

· Excellent fatigue resistance — Withstands cyclic loading from −55°C to 400°C

· Biocompatible — Grade 23 ELI grade meets ASTM F136 for human implantation

Our Precision Parts Processing Workshop

Titanium precision parts processing

Medical Orthopedics & Dental

The 4mm diameter gives the perfect fatigue strength for external fixation pins, dental abutments and spinal mini-rods. Its elastic modulus (~110 GPa) is comparable to that of human bone leading to less stress-shielding and superior patient outcomes.

Fastening Systems for Aerospace

Machined into rivets, bolts and actuation pins for airframe and engine assembly. The rod survives high temperature cycles and resists stress-corrosion cracking where aluminium fails and steel adds weight.

Marine & Chemical Processing

Used as electrode hangers, sensor probes, valve stems and agitator shafts. Its resistance to chloride pitting and acidic media guarantee extended life in electroplating baths, chlor-alkali facilities and deep-sea settings.

Marine & Chemical Processing

titanium application

Bicycle Components

Titanium rod application

Aerospace Components

Medical Equipment

3mm-Titanium-Rod-for-Medical-and-Laboratory-Equipment.jpg

We have over 40 precise CNC lathes and machining centers including gantry systems to accommodate small-batch prototypes and big volume production runs.

Over 1,000 tonnes of annual manufacturing capacity of finished titanium goods. We have over 5,000 tonnes per year of VAR and PAM furnace capability, via our melting partners, which ensures a steady supply of raw material.

We support customers across 100+ international collaborations, with experience delivering to aerospace, medical device, chemical, and marine sectors worldwide.


Vacuum Melting	Breakdown Forging	Forging & Rolling

Every 4mm titanium rod passes a rigorous multi-stage inspection protocol:

Dimensional Inspection — Laser micrometer checks diameter consistency and ovality. Out-of-roundness must remain below 0.005mm for Swiss CNC compatibility.

Ultrasonic Flaw Detection — 100% ultrasonic testing per AMS 2631 detects internal cracks, porosity, or inclusions with no margin for error at this cross-section size.

Chemical Composition Analysis — ONH analysis per ASTM E1409/E1941 verifies oxygen, nitrogen, and hydrogen content. Hydrogen is capped at 0.015% to prevent embrittlement.

Surface Roughness Testing — Ra < 0.8μm verified by surface roughness gauges on centerless-ground bars.

Microstructure Analysis — Alpha-Beta phase balance and grain size (ASTM No. 7 or finer) confirmed through metallographic examination.

Material Testing & Analysis

Ultrasonic Testing & NDT Inspection

ISO 9001 Quality Management System

Frequently asked Questions

Learn more about titanium grades, custom machining, lead times, and OEM solutions.

Q: What is the difference between Grade 2 and Grade 5 for this rod?

A：Grade 2 is commercially pure titanium with excellent ductility and corrosion resistance, ideal for welding and marine use. Grade 5 (Ti-6Al-4V) is approximately 3× stronger and suited for aerospace and load-bearing structural applications.

Q: Can the rod be threaded?

A：Yes. Titanium is prone to galling, so threading requires sharp carbide tooling, low cutting speeds, and ample coolant. For Grade 5, rolled threads are preferred over cut threads to preserve fatigue life.

Q: What tolerance should I specify for Swiss CNC machining?

A：Specify centerless ground rods with h7 or h8 tolerance. This ensures the rod feeds through guide bushings smoothly without seizure or vibration during high-speed turning.

Q: Is this rod suitable for medical implantation?

A：Only when certified to ASTM F136 (Grade 23 ELI) or ASTM F67 (CP Ti). Industrial-grade ASTM B348 rods are not approved for internal body use due to permissible impurity levels.

Each shipment is carefully packed to protect rod surface finish and dimensional integrity during transit:

· Foam inserts — Custom-designed for delicate small-diameter components

· Vacuum sealed bags — With desiccants to prevent moisture-related oxidation

· Wooden crates — Sturdy outer packaging for bulk or international shipments

· Labeling & documentation — Full batch traceability labels, inspection reports, and certificates included

We offer air freight for urgent orders and sea freight for cost-effective bulk shipments worldwide.

Contact Us

Ready to source a high-performance 4mm titanium rod for your project? Contact us at sherry@hc-titanium.comfor pricing, samples, or custom drawings review.