Titanium Alloy Parts

Materials

Titanium Alloy Grade 1
Titanium Alloy Grade 2
Titanium Alloy Grade 3
Titanium Alloy Grade 4
6Al-4V Titanium Alloy

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Material Details

Titanium Alloy GR1

Ti CP Grade 1 has the lowest strength and best ductility of the four primary ASTM grades due to its higher level of purity. Commercially pure titanium grades have high corrosion resistance, excellent biocompatibility and good formability. They are classified base on their yield strength and allowable levels of the elements iron, carbon, nitrogen, and oxygen level.

Titanium Alloy GR2

Ti CP Grade 2 has higher tolerable levels of iron and oxygen and is widely used because it combines excellent formability and moderate strength with superior corrosion resistance. It has a minimum yield strength of 275 Mpa (40 ksi), and relatively low levels of impurity elements, which places it between Grades 1 and 3 in terms of strength.

Titanium Alloy GR3

Ti CP Grade 3 has a higher tolerable level of oxygen than Grade 2, along with higher minimum strength requirements. Commercially pure titanium grades have high corrosion resistance, excellent biocompatibility and good formability. They are classified base on their yield strength and allowable levels of the elements iron, carbon, nitrogen, and oxygen level.

Titanium Alloy GR4

Ti CP Grade 4 is the strongest grade of commercially pure titanium with good ductility, moderate formability, and superior corrosion fatigue resistance in seawater. With the highest allowable oxygen and iron contents it combines the excellent resistance to corrosion and corrosion fatigue of titanium with high strength that makes it a candidate to compete with steels and nickel alloys for many applications. It has a minimum yield strength of 480 MPa (70 ksi) and applicable service temperatures up to 400ºF (204ºC). It has the highest allowable oxygen and iron content of the grades and can be considered in any application where strength and corrosion resistance are important.

Material	Key features	Applications	Chemical compositions (%)
Titanium Alloy GR1	Properties and chemical composition are very similar to Grade 2, but with tighter controls on O, Fe and H contents One of the softer and more ductile grades of pure Titanium Good strength-to-weight ratio Corrosion resistant in oxidizing and mildly reducing environments Good formability	Airframe components Cryogenic vessels Heat exchangers CPI equipment Condenser tubing Pickling baskets	Ti 99.50 Fe 0.20 O 0.18 C 0.10 N 0.03 H 0.015
Titanium Alloy GR2	Good strength-to-weight ratio: Higher tensile strength (345 MPa) than Grade 1. Excellent corrosion resistance: Resistant to saltwater and various chemicals. Moderate formability: Slightly less ductile than Grade 1 but still easy to work with.	Airframe components Cryogenic vessels Heat exchangers CPI equipment Condenser tubing Pickling baskets	Ti 99.20 Fe 0.30 O 0.25 C 0.10 N 0.03 H 0.015
Titanium Alloy GR3	Higher strength: Higher tensile strength (450 MPa) compared to Grade 1 and Grade 2. Good corrosion resistance: Less than Grade 1 and Grade 2, but still excellent in many environments. Lower ductility: Less formable than Grade 1 and Grade 2.	Airframe components Cryogenic vessels Heat exchangers CPI equipment Condenser tubing Exhaust pipe shrouds	Ti 99.10 Fe 0.30 O 0.35 C 0.10 N 0.05 H 0.015
Titanium Alloy GR4	Highest strength of the commercially pure grades: Tensile strength around 550 MPa. Good corrosion resistance: Still excellent but slightly less than Grade 1 and Grade 2. Low ductility: Least ductile of the commercially pure grades, more difficult to form.	Airframe components Cryogenic vessels Heat exchangers CPI equipment Condenser tubing Pickling baskets	Ti 99.00 Fe 0.50 O 0.40 C 0.10 N 0.05 H 0.015

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