Introduction: Why Buyers Need to Understand the Differences Between TC4 and Gr2 Titanium Tubes?
In industries such as aerospace, medical implants, and high-end chemical processing, the choice of titanium tubing directly impacts product performance, lifespan, and cost structure. TC4 (Ti-6Al-4V, Grade 5) and Gr2 (Commercially Pure Titanium, Grade 2) are the two most commonly used titanium alloys, but their cost and performance differ significantly.
This guide provides a comparative analysis across mechanical properties, corrosion resistance, machinability, and procurement costs to help buyers make informed decisions, avoiding both "over-specification" and "underperformance" pitfalls.
1. Core Performance Comparison (Data-Driven Decision Making)
| Parameter | TC4 (Grade 5) | Gr2 (Grade 2) |
|---|---|---|
| Tensile Strength | ≥895 MPa | ≥345 MPa |
| Yield Strength | ≥828 MPa | ≥275 MPa |
| Elongation | 10% | 20% |
| Hardness (HV) | 330-360 | 140-200 |
| Max Operating Temp | 400°C (long-term) | 300°C (long-term) |
| Corrosion Resistance | Excellent (but < Gr2) | Best (especially crevice corrosion resistance) |
Key Takeaways:
High-strength applications (e.g., aerospace structures, orthopedic implants) → TC4 is mandatory
Pure corrosion resistance needs (e.g., chemical heat exchangers, seawater pipelines) → Gr2 offers better cost efficiency
2. Cost Analysis (Buyers’ Top Concern)
1. Material Cost Comparison
TC4 Tubing Price: ~ $50-80/kg (high market volatility)
Gr2 Tubing Price: ~ $30-50/kg (more stable)
*Note: Thin-wall/precision machining can increase costs by 30%*
2. Hidden Cost Factors
Machining Costs: TC4 is harder, requiring specialized tools (↑20-40% cost)
Welding Difficulty: Gr2 can use standard TIG welding; TC4 requires laser/electron beam welding (↑50% process cost)
Inventory Costs: TC4 lead times are typically 2-4 weeks longer than Gr2
Procurement Strategy Recommendations:
For bulk TC4 orders, prioritize certified aerospace suppliers (e.g., BaoTi, VSMPO) to reduce QC costs
For Gr2, consider spot market platforms (e.g., Shanghai Nonferrous Metals Market) to shorten lead times
3. Industry Application Matching (Avoid Selection Mistakes)
TC4’s Irreplaceable Applications
Aircraft engine compressor blade supports
Load-bearing bone screws/joint prosthetics
High-performance racing structural components
Gr2’s Optimal Applications
Chlor-alkali chemical heat exchangers
Seawater desalination pipelines
Electroplating equipment anode covers
4. Procurement Decision Flowchart (Quick Reference)
Requirement Analysis → Is tensile strength >600MPa needed? → Yes → Choose TC4 . No, is extreme corrosion resistance critical? → Yes → Choose Gr2 ↓No Prioritize cost efficiency → Choose Gr2
5. Additional Supplier Selection Tips
For TC4 Suppliers: Require AMS 4928 certification and heat treatment batch reports
For Gr2 Suppliers: Prefer ASTM B338 seamless tube manufacturers; verify salt spray test reports
Common Requirements:
Material traceability (heat number, MTR reports)
Free samples (especially for TC4 to verify machinability)
SEO & Conversion Optimization Tips
✅ Title Optimization:
Primary: "TC4 vs. Gr2 Titanium Tubes: Cost Savings or Performance Priority?"
Secondary: *"7 Key Comparisons for Aerospace/Medical Buyers"*
✅ Keyword Targeting:
Core Terms: "TC4 titanium tube price", "Gr2 titanium tube corrosion resistance"
Long-Tail Keywords: "Aerospace titanium tube TC4 or Gr2", "Medical titanium tubing cost comparison"
✅ Conversion Hooks:
Add "Free Titanium Tube Selection Calculator" (lead generation)
Embed "Supplier Rating Tool" (increase page engagement)
Conclusion
There is no absolute "better" choice between TC4 and Gr2—only optimal alignment with requirements. Buyers should:
Define mechanical performance thresholds (e.g., ISO 5832-2 for medical use)
Calculate total lifecycle costs (including machining & maintenance)
Prioritize suppliers offering technical support
Need Customized Selection Advice? Contact Us for TC4/Gr2 Supplier Shortlist
(This article is regularly updated with market pricing data—bookmark for reference!) Email: linhui@lhtitanium.com
