Titanium Grade 7: Palladium-Alloyed CP Titanium for Reducing Acids
ASTM B265 · Published: 2026-06-03 · Updated: July 2026
Titanium Grade 7 is commercially pure titanium with a 0.12-0.25% palladium addition that dramatically improves corrosion resistance in reducing acid environments (HCl, H₂SO₄) where unalloyed CP titanium suffers accelerated attack. It is specified...
Titanium Grade 7 is commercially pure titanium with a 0.12-0.25% palladium addition that dramatically improves corrosion resistance in reducing acid environments (HCl, H₂SO₄) where unalloyed CP titanium suffers accelerated attack. It is specified for chemical processing equipment handling hot chloride brines, HCl pickling solutions, and sulfuric acid at moderate concentrations.
Quick Facts
| Category | Titanium Alloy |
| Standard | ASTM B265 |
| Density | 4.52 g/cm³ |
| Yield Strength | 275 MPa |
| Tensile Strength | 345 MPa |
Global Equivalents & Cross-Reference
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Frequently Asked Questions
Is the palladium addition worth the cost premium?
Grade 7 costs approximately 30-50% more than Grade 2 due to palladium ($1,500+/oz). The premium is justified when the process environment contains reducing acids that would attack standard CP titanium — a single equipment failure in a chemical plant far exceeds the material cost difference.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu