RAYCHIN LIMITED

Titanium Set Screws – Comprehensive Product Range

Critical Applications of Titanium Set Screws

International Standards & Global Designations – Titanium Set Screws

RAYCHIN LIMITED manufactures titanium set screws from vacuum arc remelted (VAR) or plasma arc melted material conforming to the most widely used national and international specifications. All material is traceable to the mill with complete certifications .

Chemical Composition (Weight %) – Titanium Alloys

Our titanium set screws are produced from vacuum arc remelted (VAR) or plasma arc melted material conforming to the limits of applicable ASTM and AMS standards .

Commercially Pure Grades (ASTM F467 / B348)

Grade 5 Titanium (Ti-6Al-4V) – UNS R56400

Grade 7 Titanium (Ti-Pd) – UNS R52400

Metallurgical note: Titanium alloys are lightweight metals with density approximately 4.43-4.51 g/cm³ – about 45% lighter than steel while offering comparable or superior strength . Grade 5 (Ti-6Al-4V) is an alpha-beta alloy strengthened through a combination of aluminum (alpha stabilizer) and vanadium (beta stabilizer), providing excellent strength, fatigue resistance, and corrosion resistance . Grade 2 is commercially pure titanium with exceptional corrosion resistance and formability, ideal for marine and chemical applications . Grade 7 contains palladium additions (0.12-0.25%) that significantly enhance corrosion resistance in reducing acids and crevice conditions . All titanium alloys exhibit exceptional corrosion resistance due to the formation of a stable, self-healing oxide layer (TiO₂) that provides protection in seawater, acids, and oxidizing environments . Titanium is completely non-magnetic and exhibits minimal gas discharge, making it ideal for semiconductor and medical imaging applications . When installing titanium set screws, use anti-seize compound to prevent galling – a common issue with titanium due to its tendency to cold-weld under high pressure .

Complete Mechanical & Physical Properties – Titanium Alloys (MPa / ksi)

Titanium set screws are supplied in annealed condition per applicable ASTM specifications. Data represent typical values based on industry standards .

Mechanical Properties – Titanium Alloys (Annealed Condition)

Physical Properties – Titanium Alloys

High-Temperature Mechanical Properties – Titanium Alloys

Note: For long-term service, titanium alloys are typically limited to 300-400°C due to oxidation and microstructural stability . At 900°C, protective coatings such as TiAlN are required to prevent rapid oxidation and alpha-case formation .

Exceptional Corrosion Resistance of Titanium Set Screws

Titanium alloys are renowned for their outstanding corrosion resistance, often outperforming stainless steel in aggressive environments . The material forms a stable, adherent, and self-healing oxide layer (TiO₂) that provides protection against a wide range of corrosive media . In salt spray testing (10% NaCl), titanium exhibits corrosion rates less than 0.01 mm/year, compared to 0.1 mm/year for 304 stainless steel . Titanium is virtually immune to seawater corrosion, making it ideal for marine and offshore applications .

Corrosion Resistance to Common Media

Corrosion Resistance to Chlorides and Chemical Media

Note: At higher temperatures (>80°C) and in crevice conditions with chlorides, Grade 7 titanium with palladium addition is recommended to prevent crevice corrosion .

• Corrosion Resistance: Titanium offers exceptional resistance to seawater, salt spray, chlorides, nitric acid, and oxidizing environments . In salt spray testing, titanium corrodes at rates <0.01 mm/year – significantly outperforming stainless steel .
• Pitting & Crevice Corrosion: Titanium is virtually immune to pitting corrosion in chloride environments, but at temperatures >80°C in crevice conditions, palladium-stabilized grades (Grade 7, Grade 16) are recommended .
• Chlorine Resistance: Titanium is immune to wet chlorine attack up to 350°C, making it ideal for chlorine-based process equipment . Dry chlorine gas, however, causes rapid attack and ignition risk .
• Biocompatibility: Titanium is fully biocompatible, non-toxic, and does not elicit adverse tissue reactions, making it ideal for medical implants and surgical instruments .
• Galvanic Corrosion: Titanium is more noble than aluminum and steel but may experience galvanic corrosion when coupled with dissimilar metals. Appropriate isolation or coating may be required.
• High-Temperature Protection: At temperatures above 900°C, protective coatings such as TiAlN are required to prevent rapid oxidation and alpha-case formation .

Manufacturing Standards – Titanium Set Screws

All titanium set screws are manufactured and tested to meet the following standards:

We offer surface finishes: plain (as-machined), passivated, anodized (blue, gold, purple, red, black), PVD coated (TiN, CrN, AlTiN), and PTFE-coated for enhanced lubricity . Controlled annealing processes per ASTM specifications ensure consistent mechanical properties. Specialized CNC machining and thread rolling for accurate point geometry with hexagon socket drive. Class 2A/3A/6g thread fit. 100% inspection available including dimensional inspection, thread verification, and non-destructive examination. Full traceability and material test reports (MTR) with mill certifications available. AS9100 and ISO 9001:2015 certified quality management. ISO 13485 certified for medical applications with cleanroom packaging available . Build-to-print specials to customer specifications are available.