Titanium Grade 1 vs Ti-6Al-4V ELI (Grade 5 ELI): 65% composition overlap. Moderate differences, generally not direct substitutes.
Titanium Grade 1 vs Ti-6Al-4V ELI (Grade 5 ELI)
Side-by-side chemical composition and mechanical property comparison.
Overview
Titanium Grade 1
3.7025
The softest and most ductile commercially pure titanium grade. Lowest O content (0.18% max) for maximum formability. Used for plate heat exchangers, chemical plant vessels, explosive cladding, deep-drawn parts, and anodizing applications. Lower strength than Grade 2 but superior formability.
Ti-6Al-4V ELI (Grade 5 ELI)
3.7165
Extra Low Interstitial version of Ti-6Al-4V — the standard titanium for surgical implants. Reduced O, N, C, Fe for improved ductility, fracture toughness, and biocompatibility. Used for hip and knee implants, bone screws, dental implants, spinal fusion devices, and cardiovascular stents. Also called Grade 23.
| Titanium Grade 1 | Ti-6Al-4V ELI (Grade 5 ELI) | |
|---|---|---|
| Material Number | 3.7025 | 3.7165 |
| Category | Titanium | Titanium |
| Standard | ASTM B265 | ASTM F136 |
Chemical composition (wt%)
| Element | Titanium Grade 1 | Ti-6Al-4V ELI (Grade 5 ELI) | Overlap |
|---|---|---|---|
| C | 0–0.08% | 0–0.08% | OK |
| V | — | 3.5–4.5% | — |
| Al | — | 5.5–6.5% | — |
| Ti | ≥ 99% | — | — |
Mechanical properties
| Property | Titanium Grade 1 | Ti-6Al-4V ELI (Grade 5 ELI) | Unit |
|---|---|---|---|
| yield_strength | ≥ 170 | ≥ 795 | MPa |
| elongation | ≥ 24 | ≥ 10 | % |
| e_modulus | ≥ 103 | ≥ 114 | GPa |
Compatibility Assessment
Titanium Grade 1 and Ti-6Al-4V ELI (Grade 5 ELI) have moderate differences (65% overlap). They are generally not direct substitutes. Consider the specific requirements of your application.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Titanium Grade 1 the same as Ti-6Al-4V ELI (Grade 5 ELI)?
Titanium Grade 1 and Ti-6Al-4V ELI (Grade 5 ELI) have a 65% composition overlap. They are generally not directly interchangeable.
Can I replace Titanium Grade 1 with Ti-6Al-4V ELI (Grade 5 ELI)?
Generally not recommended. The compositions differ significantly (65% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between Titanium Grade 1 and Ti-6Al-4V ELI (Grade 5 ELI)?
The main differences are in the following elements: overall alloying content. Titanium Grade 1 is a Titanium grade, while Ti-6Al-4V ELI (Grade 5 ELI) is a Titanium grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
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