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Choosing the wrong titanium grade can double your material cost or lead to premature failure. This guide walks through five decision factors for selecting the optimal grade.Factor 1: Strength RequirementsLow strength (240-345 MPa): Gr1 and Gr2 for general industrial, chemical piping, heat exchangers. Medium strength (450-620 MPa): Gr3, Gr4, Gr9 for pressure vessels, tubing, sports. High strength (828-895 MPa): Gr5 and Gr23 ELI for aerospace, medical, automotive.Factor 2: Corrosion EnvironmentSeawater and most chemicals: Gr2 handles the vast majority of industrial applications at the lowest cost. Reducing acids (HCl, H2SO4) or hot chlorides above 80C: Upgrade to Gr7 (palladium) or Gr12 (nickel-molybdenum, lower cost). Body fluids: Gr4 and Gr23 ELI per ASTM F136.Factor 3: Fabrication MethodWelding: Gr2 is the most weldable, no post-weld treatment. Gr5 requires more care. Forming: Gr1 is the most formable. Gr9 offers best strength-formability balance. Machining: Gr5 machines better than CP grades.Factor 4: Operating TemperatureUp to 250C: All grades, Gr2 most cost-effective. 250-400C: Gr5 maintains good strength. Above 400C: specialized high-temperature alloys required.Factor 5: Budget and CertificationsCost ranking (lowest to highest): Gr2, Gr9, Gr12, Gr5, Gr7, Gr23 ELI. Aerospace requires AMS-certified with UT. Medical implants require ASTM F136 or F67. Industrial uses ASTM B265/B348/B338 with EN 10204 3.1.Contact Ylasting Titanium for free material selection guidance. All grades from factory stock with full mill test certificates.
