What is the difference between titanium GR2 and titanium alloy GR5?

What is the difference between titanium GR2 and titanium alloy GR5?

GR2 is an industrial pure titanium, the most common and widely used of all pure titanium. GR2 titanium contains about 99.5% pure titanium, as well as a small amount of iron and oxide. It has high strength and low density, good mechanical properties, strong toughness and corrosion resistance. Due to its good mechanical properties, bendability and toughness, GR2 titanium is widely used in chemical equipment, chlor-alkali industry, seawater desalination, seawater aquaculture and other places resistant to acid and alkali corrosion.

 

GR5 is an α+β titanium alloy, which contains 6% aluminum and 4% vanadium in addition to titanium. GR5 is a titanium alloy material with extremely wide applications. It has good mechanical properties, high tensile strength and yield strength, and good ductility. It is resistant to high and low temperatures, and can work underground with high temperature and high pressure, and can also work on the seabed with low temperature and high pressure. Because GR5 is non-magnetic and harmless to the human body, it is widely used in medical devices, orthopedic human implants, etc. It can also be used in oil exploration and other industries. The main use of GR5 is in high-end industries such as aviation, aerospace, and military industry.

 

The following table compares the chemical composition and mechanical properties of GR2 and GR5.

Titanium and titanium alloy grades and chemical composition

Grade

Main ingredients

Impurities, not more than

Ti

Al

V

Zr

Si

Cr

Fe

Pd

Mo

Ni

Fe

C

N

H

O

Other

GR1

margin

/

/

/

/

/

/

/

/

/

0.15

0.10

0.03

0.015

0.15

0.4

GR2

margin

/

/

/

/

/

/

/

/

/

0.25

0.10

0.03

0.015

0.20

0.4

GR5

margin

5.5-6.5

3.5-4.5

/

/

/

/

/

/

/

0.30

0.08

0.05

0.015

0.20

0.40

Grade	Nominal chemical composition	Status	Tensile Strength Rm/MPa	Yield Strength Rp0.2/MPa	Elongation A50MM/%
GR1	Industrial pure titanium	M	≥240	140-310	≥24
GR2	Industrial pure titanium	M	≥400	275-450	≥20
GR5	Ti-6Al-4V	M	≥895	≥825	≥10

 

 

The main difference between GR2 and GR5 in the fastener screw industry is that GR2 has weaker mechanical strength, and the screw threads are easily deformed and worn. It is generally used in chemical equipment and other places where strength and corrosion resistance are not high enough. GR5 is used in aerospace, automobiles, motorcycles, bicycles, and other industries that require higher strength.