Ti Grade 7 vs Titanium Grade 2 (CP): Identical mechanical properties — Grade 7 adds Pd for corrosion
Ti Grade 7 vs Titanium Grade 2 (CP)
Side-by-side chemical composition and mechanical property comparison.
Overview
Ti Grade 7
3.7235
Palladium-enhanced commercially pure titanium — the most corrosion-resistant Ti grade. Same mechanical properties as Grade 2, but with 0.12-0.25% Pd for dramatically improved resistance to reducing acids (HCl, H2SO4) and crevice corrosion. Premium price justified only where extreme chemical resistance is needed. Used for chemical processing equipment, desalination plants, and chlor-alkali cells.
Titanium Grade 2 (CP)
3.7035
The workhorse commercially pure titanium grade. Best balance of strength, ductility, and corrosion resistance among CP grades. Excellent resistance to seawater, chlorides, and oxidizing acids. Used for heat exchangers, chemical processing, marine hardware, desalination, and medical implants.
| Ti Grade 7 | Titanium Grade 2 (CP) | |
|---|---|---|
| Material Number | 3.7235 | 3.7035 |
| Category | Titanium | Titanium |
| Standard | ASTM B265 | ASTM B265 |
Chemical composition (wt%)
| Element | Ti Grade 7 | Titanium Grade 2 (CP) | Overlap |
|---|---|---|---|
| C | 0–0.08% | 0–0.08% | OK |
| Ti | — | — | — |
| N | 0–0.03% | 0–0.03% | OK |
| Pd | 0.12–0.25% | — | — |
Mechanical properties
| Property | Ti Grade 7 | Titanium Grade 2 (CP) | Unit |
|---|---|---|---|
| tensile_strength | ≥ 345 | ≥ 345 | MPa |
| yield_strength | ≥ 275 | ≥ 275 | MPa |
| elongation | ≥ 20 | ≥ 20 | % |
Compatibility Assessment
Same base composition and identical mechanical properties (UTS 345, YS 275). Grade 7 adds 0.12-0.25% Pd which dramatically improves resistance to reducing acids and crevice corrosion. Choose Grade 7 only when exposed to HCl, H2SO4, or aggressive crevice conditions — otherwise Grade 2 is sufficient at lower cost.
Frequently Asked Questions
Is Ti Grade 7 the same as Titanium Grade 2 (CP)?
Ti Grade 7 and Titanium Grade 2 (CP) have a 95% composition overlap. Identical mechanical properties — Grade 7 adds Pd for corrosion
Can I replace Ti Grade 7 with Titanium Grade 2 (CP)?
In many cases, yes. The compositions overlap significantly (95%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between Ti Grade 7 and Titanium Grade 2 (CP)?
The main differences are in the following elements: overall alloying content. Ti Grade 7 is a Titanium grade, while Titanium Grade 2 (CP) is a Titanium grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.