Grade 1 Titanium: Performance and Application

GR1 Titanium Pipe

GR1 titanium pipe is the softest and most ductile of all commercially pure titanium grades, making it an excellent choice for applications requiring superior formability. Compared with Grades 2, 3, and 4, GR1 titanium offers the highest elongation and best cold-working performance, especially for complex shapes such as formed components and GR1 titanium tube. Although its mechanical strength is lower than other CP grades and significantly lower than alloyed titanium like Grade 5 (Ti-6Al-4V), GR1 titanium pipe provides outstanding corrosion resistance in oxidizing environments, including seawater and chemical media. This makes it a preferred material for industries where durability and reliability are critical.

Performance Comparison of GR1 Titanium Pipe

Chemical Composition of GR1 Titanium

GR1 titanium is a commercially pure titanium material with a minimum titanium content of approximately 99 percent. Its properties are controlled by small amounts of interstitial elements: oxygen 0.18% max, iron 0.20% max, nitrogen 0.03% max, carbon 0.08% max, and hydrogen 0.015% max. Compared with GR2-GR4, GR1 contains the lowest oxygen content, resulting in superior ductility and softness.

Mechanical Properties

Tensile strength is about 240 MPa minimum, yield strength (0.2% offset) about 170 MPa, elongation is the highest among CP grades, density is 4.51 g/cm3, and it is the softest titanium grade.

Application Fields of GR1 Titanium Pipe

Chemical processing: heat exchangers, storage tanks, and pipelines handling acids and chlorides. Marine engineering: resistance to seawater corrosion for desalination plants and offshore equipment. Energy and power: condensers and heat transfer equipment with long service life. Medical applications: non-load-bearing implants and devices (ASTM F67 grade 1) due to biocompatibility. Industrial fabrication: deep drawing, forming, and custom fabrication. Piping systems: corrosive process environments.

Quality Control and Testing

Chemical composition analysis, tensile testing, elongation testing, dimensional inspection, surface inspection, corrosion testing, ultrasonic testing, eddy current testing, and hydrostatic testing are applied to verify GR1 titanium pipe quality.

Packaging and Logistics

Plastic end caps, VCI paper inner wrap, plastic shrink wrap, steel strap bundling with edge protectors, wooden crate or heavy-duty pallet for sea or air freight, labeling with grade, standard, dimensions, and heat number, and a documentation pouch with packing list and mill test certificate.

Frequently Asked Questions

What is GR1 titanium pipe? The softest and most ductile commercially pure titanium grade, with the highest elongation and best cold-working performance.

What is the UNS number for GR1 titanium tube? R50250. ASTM B861 grade 1 tube and ASTM B338 grade 1 pipe both use UNS R50250; the Werkstoff number is 3.7025.

How does GR1 compare with GR5? GR1 has lower strength but outstanding corrosion resistance and formability; GR1 is preferred when flexibility and fabrication performance matter more than high strength.

Is GR1 titanium suitable for chemical processing? Yes, for heat exchangers, storage tanks, and pipelines handling acids and chlorides.

Which tests are applied to GR1 titanium pipe? Chemical composition analysis, tensile testing, elongation testing, dimensional inspection, surface inspection, corrosion testing, ultrasonic testing, eddy current testing, and hydrostatic testing.

In which industries is GR1 titanium pipe used? Chemical processing heat exchangers, storage tanks, and pipelines; marine desalination and offshore equipment; power condensers; non-load-bearing medical implants per ASTM F67 grade 1; and general corrosive process piping.