ThePipingMart Blog Products Titanium Grade 2 Fasteners – Composition, Properties and Uses

Titanium Grade 2 Fasteners – Composition, Properties and Uses

Titanium Grade 2 Fasteners - Composition Properties And Uses

Fasteners are important in any industry, especially aerospace, marine, and medical industries. With the increasing demand for strong and lightweight materials, titanium has become a go-to material for fasteners. Among the different titanium grades, titanium grade 2 has gained popularity due to its excellent properties. This blog post will look in-depth into titanium grade 2 fasteners and their composition, physical properties, mechanical properties, uses, heat treatment, and corrosion resistance.

 

Titanium Grade 2 Fasteners Composition

Titanium grade 2 is a commercially pure titanium alloy composed of 99.2% titanium, 0.25% iron, 0.03% carbon, 0.015% nitrogen, and traces of other elements. The low interstitial elements in this alloy make it highly ductile, easily formable, and weldable. The addition of iron gives it higher strength and makes it more corrosion-resistant.

UNS
Designation
Number
Alloy General
Name
Al C Fe Ti H N O Pd V Cr Mo Zr Sn Si Ru ResidualsB
Each, max Total, max
ASTM F468 Grade R50400 2 Titanium Gr 2 . . . 0.10 0.30 balance 0.0125 0.05 0.25 . . . . . . . . . . . . . . . . . . . . . . . . 0.1 0.4

Titanium Grade 2 Fasteners Physical Properties

UNS R50400 Bolts has excellent physical properties, making it a popular fastener choice. It has a 4.51 g/cm³ density, approximately 60% less than steel. Its melting point is 1670°C, and its boiling point is 3287°C. Titanium grade 2 has good thermal and electrical conductivity, and its coefficient of thermal expansion is relatively low compared to other metals.

Element Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
Titanium Gr. 2 4.5 g/cm3 1665 °C (3030 °F) Psi – 49900 , MPa – 344 Psi – 39900 , MPa – 275 20 %

Titanium Grade 2 Fasteners Mechanical Properties

Regarding mechanical properties, titanium grade 2 fasteners have a high strength-to-weight ratio, excellent fatigue resistance, and high corrosion resistance. Its ultimate tensile strength is between 370-530 MPa, and its yield strength is between 240-450 MPa. Its elongation at break is about 20-30%, which makes it ideal for applications that require good formability.

Density
Melting Point
Yield Strength (0.2%Offset)
Tensile Strength
Elongation
4.5 g/cm3
1665 °C (3030 °F)
Psi – 39900 , MPa – 275
Psi – 49900 , MPa – 344
20 %

Titanium Grade 2 Fasteners Equivalent

STANDARD
UNS
WERKSTOFF NR.
Titanium Gr 2
R50400
3.7035

Titanium Grade 2 Fasteners Uses

UNS R50400 fasteners are widely used in various industries, including aerospace, marine, medical, and chemical industries. Aerospace is used in aircraft components such as fasteners, bolts, screws, and other parts that require a high strength-to-weight ratio. The medical industry uses titanium grade 2 fasteners in implants and prosthetics due to their biocompatibility. The marine industry uses them in saltwater applications due to their high corrosion resistance.

Titanium Grade 2 Fasteners Heat Treatment

DIN 3.7035 Stud Bolts do not require heat treatment for mechanical properties but can be annealed to improve their formability. The recommended annealing temperature is between 700-800°C for 1-2 hours, followed by air cooling. Overheating can cause alpha-case formation at the surface, which can be detrimental to the material’s corrosion resistance.

Titanium Grade 2 Fasteners Corrosion Resistance

Titanium Gr 2 Hex Bolt have excellent corrosion resistance, especially in acidic environments and saltwater. Their passive oxide layer protects them from corrosion and makes them suitable for applications that require resistance to pitting, crevice corrosion, and stress corrosion cracking. However, they are susceptible to galvanic corrosion when coupled with other metals such as steel or aluminium.

Conclusion:

Titanium grade 2 fasteners possess excellent mechanical properties, physical properties, and corrosion resistance, making them a popular choice for various industries. Their high strength-to-weight ratio, biocompatibility, and corrosion resistance make them ideal for aerospace, marine, and medical applications. The composition of 99.2% titanium, 0.25% iron, and other interstitial elements gives them good formability and weldability. Although they do not require heat treatment to improve their mechanical properties, annealing can be done to improve their formability. Finally, Titanium Gr 2 Hex Bolt are highly corrosion-resistant and are useful in saltwater environments, but proper consideration should be given when coupling them with other metals to prevent galvanic corrosion.

Related Post