Grade 5 Titanium Alloy | Ti-6Al-4V | UNS R56400 | ASTM B348 / B265 Supplier

Supplied by Huaxiao-Alloy – Your Trusted Global Alloy Partner

1. Grade 5 Titanium Alloy (Ti-6Al-4V) Overview

Grade 5 Titanium Alloy, also known as Ti-6Al-4V, is the most widely used titanium alloy worldwide, accounting for more than 50% of total titanium consumption. It is an α-β titanium alloy containing approximately 6% aluminum and 4% vanadium, offering an exceptional combination of high strength, low weight, outstanding corrosion resistance, and excellent fatigue performance.

Compared with commercially pure titanium grades (Grade 1–4), Ti-6Al-4V provides dramatically higher mechanical strength, allowing engineers to design lighter, thinner, and stronger components without sacrificing corrosion resistance or service life.

As a professional Grade 5 titanium alloy supplier, Huaxiao-Alloy supplies UNS R56400 Ti-6Al-4V in full product forms, manufactured strictly in accordance with ASTM, ASME, AMS, ISO, EN, and DIN standards, serving aerospace, medical, marine, energy, and high-performance industrial markets.

2. Equivalent Standards & Designations

Grade 5 titanium alloy is internationally standardized and universally accepted.

Standard System	Designation
ASTM	Grade 5 (Ti-6Al-4V)
UNS	R56400
AMS	AMS 4928 / AMS 4911 / AMS 4965
ISO	ISO 5832-3
DIN / EN	3.7165 / 3.7164
JIS	TAP6400
GB (China)	TC4

➡️ These equivalents ensure seamless use of Ti-6Al-4V across global engineering and regulatory systems.

3. Chemical Composition of Grade 5 Titanium Alloy

Ti-6Al-4V is an α-β titanium alloy, where aluminum stabilizes the alpha phase and vanadium stabilizes the beta phase.

Element	Content (%)
Titanium (Ti)	Balance
Aluminum (Al)	5.5 – 6.75
Vanadium (V)	3.5 – 4.5
Iron (Fe)	≤ 0.40
Oxygen (O)	≤ 0.20
Carbon (C)	≤ 0.08
Nitrogen (N)	≤ 0.05
Hydrogen (H)	≤ 0.015

Composition Insight

Aluminum improves strength and oxidation resistance
Vanadium enhances ductility and toughness
Controlled oxygen ensures optimal strength without embrittlement

4. Mechanical Properties of Ti-6Al-4V

4.1 Mechanical Properties at Room Temperature (Annealed)

Property	Typical Value
Tensile Strength	≥ 895 MPa
Yield Strength (0.2%)	≥ 828 MPa
Elongation	≥ 10%
Hardness	~ 334 HB
Density	4.43 g/cm³
Elastic Modulus	~113 GPa

4.2 Strength-to-Weight Advantage

Twice the strength of CP titanium
Comparable strength to high-strength steel at ~60% of the weight
Ideal for aerospace and performance-critical applications

5. Key Features & Advantages of Grade 5 Titanium Alloy

5.1 Exceptional Strength-to-Weight Ratio

Ti-6Al-4V allows:

Lightweight structural designs
Reduced fuel consumption in aerospace
Increased payload capacity

5.2 Excellent Corrosion Resistance

Outstanding resistance to seawater, chlorides, marine atmospheres
Resistant to pitting, crevice corrosion, and SCC
Stable oxide film protects in harsh environments

5.3 Superior Fatigue & Creep Resistance

Excellent fatigue strength under cyclic loading
Stable mechanical properties at elevated temperatures
Suitable for long-term dynamic service

5.4 Biocompatibility & Non-Magnetic Properties

Fully biocompatible (implant-grade available)
Non-magnetic and non-toxic
Widely used in medical implants

6. Available Product Forms from Huaxiao-Alloy

Huaxiao-Alloy supplies Grade 5 Ti-6Al-4V in complete mill and fabricated forms.

6.1 Titanium Sheets & Plates

Standards: ASTM B265 / AMS 4911
Thickness: 0.5 mm – 100 mm
Condition: Annealed, solution treated

6.2 Titanium Pipes & Tubes

Standards: ASTM B861 / B338
Seamless & welded
OD: 6 mm – 219 mm

6.3 Titanium Bars & Rods

Standard: ASTM B348 / AMS 4928
Round, square, hex
Hot-rolled & cold-drawn

6.4 Titanium Wire

Diameter: 0.1 mm – 6.0 mm
Annealed or cold-worked

6.5 Forgings & Machined Components

Flanges, rings, fasteners
Aerospace & medical forgings
Custom machining to drawings

7. Typical Applications of Grade 5 Titanium Alloy

7.1 Aerospace Industry

Aircraft structural components
Engine parts
Landing gear components

7.2 Medical & Biomedical

Orthopedic implants
Dental implants
Surgical instruments

7.3 Marine & Offshore Engineering

Seawater systems
Offshore structural parts
High-strength marine fasteners

7.4 Energy & Power Generation

Turbine components
Heat exchangers
Nuclear auxiliary equipment

7.5 High-Performance Industrial Applications

Automotive racing parts
Chemical processing equipment
High-stress mechanical components

8. Corrosion Resistance Performance

Ti-6Al-4V forms a stable TiO₂ passive layer, ensuring excellent corrosion resistance.

✔ Resistant to:

Seawater and marine atmospheres
Chloride environments
Nitric acid and organic acids

❌ Limited resistance to:

Hot concentrated reducing acids
High-temperature dry chlorine gas

9. Fabrication, Machining & Welding Guide

9.1 Forming

Lower ductility than CP titanium
Hot forming recommended for complex shapes
Springback must be considered

9.2 Machining

Low cutting speeds required
Sharp carbide tools recommended
High-pressure coolant essential

9.3 Welding

Excellent weldability with inert gas shielding
TIG and electron beam welding preferred
Post-weld stress relief may be required

10. Heat Resistance & Thermal Properties

Maximum service temperature: ~400°C
Good oxidation resistance at elevated temperatures
Low thermal expansion
Stable under thermal cycling

11. Comparison: CP Titanium vs Grade 5 Ti-6Al-4V

Property	CP Titanium (Gr1–4)	Grade 5
Strength	Low–Medium	Very High
Weight	Very Low	Very Low
Corrosion Resistance	Excellent	Excellent
Cost	Lower	Higher
Typical Use	Chemical / Marine	Aerospace / Medical