Medical Grade Ti-6Al-4V (GR5/TC4) Titanium Alloy Rods for Bone Screws – Dingding Titanium

Core technical requirements for TC4 Titanium rods dedicated to medical bone screws

-- In line with the production standards of medical device manufacturers, we will firmly establish the bottom line of clinical safety

As the core raw material of medical bone screws, the technical indicators of TC4 titanium rods directly determine the clinical safety, mechanical reliability and processing adaptability of bone screws. Baoji Dingding Titanium Products Co., Ltd. focuses on the core procurement demands of medical device manufacturers. It has clearly defined the key technical requirements for TC4 titanium rods dedicated to medical bone screws from four dimensions: "compliance, performance stability, processing adaptability, and traceability", making procurement decisions more accurate, production more worry-free, and products more compliant.

I. Compliance Requirements: Comply with industry standards and meet the registration approval requirements

The primary prerequisite for medical device manufacturers to purchase is the compliance of materials to avoid affecting product registration and listing due to non-compliance with qualifications.

Execution standard: Strictly follow GB/T 13810-2017 "Titanium and titanium Alloy Materials for Surgical Implants" and ISO 5832-2 "Metallic Materials for surgical implants - Part 2: The "Titanium 6 Aluminum 4 Vanadium Alloy" complies with the ASTM F136 international standard, ensuring that the material can be directly used in the production of bone screws and for registration with NMPA and FDA.

2. Biological safety: Made from high-purity sponge titanium with a purity of ≥99.7%, the content of interstitial elements is strictly controlled - nitrogen ≤0.01%, hydrogen ≤0.001%, to prevent impurities from causing inflammation, allergies or tissue reactions during long-term use in the human body. It has passed biocompatibility tests such as cytotoxicity (ISO 10993-5) and allergenicity (ISO 10993-10), and a qualified report has been issued by a third-party authoritative institution.

3. Complete qualifications: Each batch of products is equipped with a complete "raw material inspection report + production process record + finished product inspection report", enabling full-process traceability from raw materials to finished products and meeting the quality system audit requirements of medical device manufacturers.

Ii. Mechanical property Requirements: Match clinical needs and ensure safe use

Bone screws need to withstand the complex mechanical environment brought about by the load-bearing and movement of human bones. The mechanical properties of titanium rods need to take into account strength, toughness and bone fit.

Core mechanical indicators: Tensile strength ≥930MPa, yield strength ≥860MPa, elongation ≥10%, hardness (HV) controlled between 280 and 340, to ensure that the bone screw can stably fix the fracture site after implantation and avoid the risk of deformation and fracture.

2. Uniformity of performance: The strength and hardness fluctuate by no more than 5% throughout the full length range, and the grain size reaches ASTM grade 6 or above. There are no issues such as component segregation or uneven structure, ensuring consistent performance at different parts of the bone stud (stud head, stud rod, thread), and no risk of cracking or brittle fracture after processing.

3. Bone compatibility: The elastic modulus is approximately 110GPa, approaching the mechanical properties of human bones (10-30 gpa), effectively reducing the "stress shielding effect", promoting fracture healing, and lowering the clinical risks of postoperative osteoporosis and secondary fractures.

Iii. Requirements for Processing adaptability: Reduce production losses and enhance production efficiency

Medical device manufacturers are concerned about whether the materials can be efficiently processed into finished bone screws to reduce losses and costs in the production process.

1. Dimensional accuracy: The diameter tolerance is strictly controlled within ±0.01mm, and the straightness error is ≤0.05mm/m. After centerless grinding, the diameter tolerance is h8, which perfectly matches the precision thread processing, bending forming and other processes of bone nails, reducing material waste during turning and grinding.

2. Surface quality: The surface should be free of cracks, folds, oxide scale, scratches and other defects. After mechanical polishing treatment, the surface roughness Ra should be ≤0.4μm. A dense oxide film is formed on the surface, with a body fluid corrosion resistance rate of ≤0.001mm per year. This not only reduces the wear of processing tools but also avoids tissue irritation caused by surface defects after implantation.

3. Forming performance: Elongation ≥10%, reduction of area ≥30%, meeting the complex forming process requirements such as thread rolling and head upsetting of bone screws. During processing, cracks and chipped corners are less likely to occur, improving the qualification rate of finished products.

Iv. Quality stability requirements: Consistent batch size and long-term reliability

Medical device manufacturers pay close attention to the consistency of batch supply and the long-term service stability of products when purchasing, to avoid the impact on production or clinical use due to batch differences.

1. Batch consistency: The composition, mechanical properties, and dimensional accuracy of titanium rods in the same batch fluctuate by no more than 3%, and the difference between different batches is no more than 5%, ensuring that the production process parameters of bone screws do not need to be frequently adjusted and guaranteeing the stable operation of the production line.

2. Long-term stability: After "solution + aging" heat treatment (950℃/1h solution water quenching +600℃/2h aging air cooling), a stable α+β dual-phase structure is obtained. It can be used for a long time in the human body fluid environment (≥10 years) without performance decline, and there is no risk of deformation, corrosion or fracture.

3. Full-item inspection guarantee: Each batch of products undergoes full-batch spectral composition analysis, full-batch ultrasonic non-destructive testing (internal defects ≤Φ0.8mm equivalent flat-bottom holes), tensile tests, hardness tests, and surface quality inspections. Non-conforming products are released without exception to eliminate quality risks.

Baoji Dingding Titanium: Preferred Partner for Purchasing medical TC4 Titanium rods

Relying on the full industrial chain advantages of "China Titanium Valley", we take "physical factory + complete qualifications + technical customization + rapid delivery" as the core to provide one-stop TC4 titanium rod supply services for medical device manufacturers

We have our own 8,000-square-meter production base with an annual production capacity of 300 tons. Standardized products are delivered within 3 days, and customized specifications are responded to within 25 days.

- Certified by ISO 13485 medical quality management system, with complete test reports provided to help customers complete product registration quickly.

Our 24-hour technical team is online and can provide material selection and process optimization support based on the design requirements of bone screws (such as special specifications and mechanical performance customization).

On-site inspection: No. 68, Gaoya Industrial Park, Gaoxin Avenue, High-tech Zone, Baoji City, Shaanxi Province (Welcome to visit our factory at any time to verify production capacity and quality control system)

Choose Baoji Dingding Titanium TC4 Titanium rods for medical bone screws, and you will have no compliance concerns when purchasing, no process difficulties in production, and no clinical risks in products, achieving high-quality development in the orthopedic implant field together!