Seamless Titanium Pipe Grade 4
Grade 4 seamless titanium pipe - the strongest commercially pure grade (tensile ≥550 MPa): composition O ≤0.40%, properties, ASTM B861/ASME SB861, for chemical, marine and structural use.
Description
What Grade 4 Titanium Is
Grade 4 is the highest-strength grade among the four commercially pure (CP) titanium grades. It is not an alloy: it contains no intentional aluminum, chromium or molybdenum additions. Its higher strength comes from a higher oxygen content (maximum 0.40%) - oxygen dissolves interstitially and strengthens the metal without alloying elements.
Chemical Composition (ASTM B861, wt % max)
| Element | Grade 4 |
|---|---|
| Ti | Balance (≥99.0 typical) |
| O | 0.40 |
| Fe | 0.50 |
| C | 0.08 |
| N | 0.05 |
| H | 0.015 |
Mechanical and Physical Properties
Tensile strength ≥550 MPa (typical 550-700 MPa in annealed condition); yield ≥480 MPa; elongation ≥15%.
Density 4.51 g/cm3; melting point ~1668°C; elastic modulus ~105-120 GPa.
Conductivity: titanium is a relatively poor conductor - electrical conductivity is only about 3% IACS, far below copper or aluminum. Use Grade 4 for strength and corrosion resistance, not for electrical or thermal duty.
First-class titanium production technology
Corrosion Resistance
Outstanding in oxidizing acids, seawater and most chemical media thanks to the dense, self-healing TiO2 film - comparable to other CP grades. As with all CP titanium, avoid long-term exposure to hot reducing acids and chlorides where crevice corrosion can occur (in those services consider Grade 7/16/17).
Applications (Corrected)
Chemical processing: piping, vessels, heat exchangers, reactors.
Power generation: condensers and cooling-water tubing.
Marine engineering: structures and equipment in seawater service.
Medical: instruments and non-implant hardware (biocompatible, but for load-bearing implants titanium alloys are more common).
Aerospace: structural components and fasteners where strength-to-weight matters - not turbine blades or combustion hardware, which require heat-resistant alloys.
Industrial: fasteners, fittings and components needing CP-titanium corrosion resistance at the highest unalloyed strength.
Selection Guidance
Choose Grade 4 when you need the maximum strength available from unalloyed titanium. If the application demands still higher strength, move to an alpha-beta alloy such as Grade 5 (Ti-6Al-4V) or Grade 23 (ELI) - not to a higher CP grade. For forming-heavy designs, Grades 1-2 offer better ductility.
About Us
GNEE was established in 2008 with 16 years of experience in foreign trade export. Our main products are titanium tubes, titanium rods, titanium wires, titanium foils, titanium sheets and parts of various specifications. We cooperate with many famous factories to provide you with large quantities of high quality metals and customized products. We have up to 200 employees and will continue to grow in the future. All of them are committed to providing you with better products and services. We are committed to providing you with the best products and services, and we will provide you with more favorable pricing and safe and fast transportation solutions.GENN is trustworthy. We look forward to working with you.
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