Case Study: Heat Exchanger Material GR5 VS GR2
Jan 16, 2026
Requirements Analysis:
Operating temperature: 200°C
Pressure: 15 bar
Corrosive chloride environment
Design life: 20 years
Heat transfer coefficient: >800 W/m²·K
Budget constraints: Moderate
Material Evaluation:
Grade 2 Advantages: Superior chloride corrosion resistance, better thermal conductivity (17 vs 6.7 W/m·K), lower cost
Grade 5 Advantages: Higher strength allows thinner tubes, better high-temperature properties
Key Decision Factor: Corrosion resistance was critical in chloride environment
Final Selection: Grade 2 titanium sheet (1.2mm thickness) with enhanced surface finish
Results:
20% cost savings compared to Grade 5 alternative
Superior corrosion resistance with zero failures in 8 years
Heat transfer coefficient of 950 W/m²·K exceeded requirements
Minimal maintenance requirements
Extended service life projected beyond 20 years
Quality Standards and Certification
| Standard | Grade 2 | Grade 5 | Certification Requirements |
|---|---|---|---|
| ASTM B265 | ✓ | ✓ | Chemical composition, mechanical properties |
| ASME SB-265 | ✓ | ✓ | Pressure vessel applications |
| AMS 4902 | ✓ | - | Aerospace applications |
| AMS 4911 | - | ✓ | Aerospace Ti-6Al-4V |
| ISO 5832-2 | ✓ | - | Medical applications |
| ISO 5832-3 | - | ✓ | Medical Ti-6Al-4V |
FAQ
Q:1.Is Grade 5 titanium always better than Grade 2?
A:No, Grade 5 is not universally better than Grade 2. Grade 5 offers higher strength, but Grade 2 provides better formability, excellent corrosion resistance, and lower cost. The "better" choice depends entirely on your specific application requirements
Q:2.How much stronger is Grade 5 titanium compared to Grade 2?
A:Grade 5 titanium has approximately 2.6 times the tensile strength and 3 times the yield strength of Grade 2 titanium. Specifically, Grade 5 offers ~895 MPa tensile strength versus ~345 MPa for Grade 2.
Q:3.Is Grade 5 titanium worth the higher cost?
A:Grade 5 is worth the higher cost when your application requires its superior strength, fatigue resistance, or elevated temperature performance. For applications where Grade 2's properties are sufficient, it provides better value for money.
Q:4.Which titanium grade is easier to machine and form?
A:Grade 2 is generally easier to form and weld than Grade 5 due to its greater ductility. However, both grades present machining challenges and require appropriate techniques, tools, and cooling.
Q:5.Can Grade 5 titanium be heat treated?
A:Yes, Grade 5 titanium responds well to heat treatment, including aging and annealing processes, which can enhance its mechanical properties. Grade 2 titanium typically does not require heat treatment.
Q:6.Which titanium grade is used in aerospace applications?
A:Both grades are used in aerospace, with Grade 5 employed for structural components, engine parts, and landing gear where strength is critical, and Grade 2 used for ducts, casings, and non-structural components where corrosion resistance and formability are priorities.
Our factory
Our modern titanium material precision processing factory specializes in the R&D, customization, and production of titanium and titanium alloy products. We mainly supply high-precision products such as titanium tubes (seamless/welded), titanium plates/coils, titanium bars/wires, and titanium strips. Adhering to international standards (such as ASTM, ASME, DIN, etc.) and utilizing advanced smelting, forging, rolling, and precision machining technologies, combined with full-process quality control and non-destructive testing, we ensure that our products deliver excellent corrosion resistance, high strength, and lightweight properties for applications in aerospace, chemical and medical industries, marine engineering, and high-end manufacturing. With a focus on stable supply, technical support, and international trade services, we provide global customers with high-performance titanium material solutions.
Titanium product packaging
We understand the value of titanium products and the importance of shipping safety. Therefore, we have adopted professional and reliable customized packaging solutions. For products of various forms such as titanium tubes, plates, and bars, we employ multiple layers of protection-including anti-rust inner linings, sturdy wooden/steel crates, and waterproof wrapping films-to ensure the products are safeguarded against moisture, impact, and abrasion during long-distance sea transport and multiple transshipments. All packaging strictly complies with international export standards and features clear, complete labeling (such as marks, dimensions, weight, warning symbols, etc.).
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