Alpha & Near-alpha alloys

Grade 12

Common Shapes

Grade 12 Titanium is commonly available in:

  • Sheets and Plates

  • Welded Tubes and Pipes 

  • Wire

  • Billet

  • Ingot

  • Forgings

Characteristics

  • Good strength

  • Meets ASME code for both strength and pressure at elevated temperatures

  • Excellent crevice corrosion resistance

  • Advanced resistance to chlorides

Uses

  • Chemical processing equipment

  • Desalination plant equipment

  • Geothermal brine energy extraction

  • Hydrometallurgical extraction

  • On/Offshore Hydrocarbon refining/production

  • Marine components

  • Aircraft components

  • Pumps

  • Valves

Weldability

Grade 12 Titanium has excellent welding characteristics

Machinability

Grade 12 Titanium is not best suited to machining. The best results are achieved using slow speeds, accurate cooling flow and high feed rates.

UNS Number

R53400

Composition

Alpha structure Titanium Alloy with alloying elements; 0xygen: ≤0.25, Nitrogen: ≤0.03, Carbon: ≤0.08, Hydrogen: ≤0.015, Iron: ≤0.30, Nickel: 0.60-0.90, Molybdenum: 0.20-0.40

Ti-5Al-2Sn(-ELI)

Common Shapes

Ti-5Al-2Sn(-ELI) Titanium is commonly available in:

  • Ingot

  • Billet

  • Bars

  • Rod

  • Sheet & Plate

Characteristics

  • Extra Low Interstitial version of Grade 6

  • Good toughness and strength in cryogenic use

  • Used in cryogenic vessels as low as -255°C

Composition

Alpha structure Titanium Alloy with alloying elements; 0xygen: ≤0.20, Nitrogen: ≤0.05, Carbon: ≤0.08, Hydrogen: ≤0.02, Iron: ≤0.50, Aluminium: 4.00-6.00, Selenium: 2.00-3.00. 

Uses

  • Cryogenic applications

  • Airframes

  • Jet engine components

  • Gas turbine components

  • Space vehicles

Weldability

Ti-5Al-2Sn(ELI) Titanium has excellent welding characteristics.

Machinability

Ti-5Al-2Sn(ELI) Titanium is not best suited to machining. The best results are achieved using slow speeds, accurate cooling flow and high feed rates.

UNS Number

R54521

Grade 8

Common Shapes

Grade 8 Titanium is commonly available in:

  • Sheet

  • Ingot

  • Billet

  • Bar

Characteristics

  • Highly creep resistant

  • High strength up to 455°C

  • Lowest density and highest modulus of all Titanium alloys

Uses

  • Gas turbine components

  • Jet engine fan and compressor blades

UNS Number

R54810

Composition

Alpha structure Titanium Alloy with alloying elements; 0xygen: ≤0.18, Nitrogen: ≤0.05, Carbon: ≤0.08, Hydrogen: ≤0.015, Iron: ≤0.30, Aluminium: 7.35-8.35, Molybdenum: 0.75-1.25, Vanadium 0.75-1.25 

Weldability

Grade 8 Titanium has good weldability.

Machinability

Grade 8 Titanium is not best suited to machining. The best results are achieved using slow speeds, accurate cooling flow and high feed rates.

Ti-6Al-2Sn-4Zr-2Mo-0.1Si

Common Shapes

Ti-6Al-2Sn-4Zr-2Mo-0.1Si Titanium is commonly available in:

  • Ingot

  • Bar

  • Billet

  • Sheet

Characteristics

  • Great strength 

  • Good stability

  • Excellent creep resistance up to 550°C

Uses

  • Airframes

  • Automotive components

  • Gas turbine components

Weldability

Ti-6Al-2Sn-4Zr-2Mo-0.1Si Titanium has fair weldability.

UNS Number

R54620

Composition

Alpha structure Titanium Alloy with alloying elements; 0xygen: ≤0.15, Nitrogen: ≤0.05, Carbon: ≤0.10, Hydrogen: 0.0125-0.015, Iron: ≤0.25, Aluminium: 5.50-6.50, Selenium: 1.80-2.20, Zirconium: 3.60-4.40, Molybdenum: 1.80-2.20, Silicon: 0.06-0.10 

Machinability

Ti-6Al-2Sn-4Zr-2Mo-0.1Si Titanium is not best suited to machining. The best results are achieved using slow speeds, accurate cooling flow and high feed rates.

Integ Metals // Materials // Titanium // Alpha & Near-Alpha
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Grade 9

Common Shapes

Grade 9 Titanium is commonly available in:

  • Plate

  • Tubes and Pipes 

  • Seamless Tube

  • Foil

  • Wire

  • Ingot

  • Billet

Characteristics

  • Good strength

  • Highest strength design allowables under code for pressure vessels

  • Good cold fabricability

  • 20-50% stronger than CP grades

  • More formable and weldable than Grade 5

  • Excellent combination of strength, weldability and formability

Uses

  • Ducting and tubing for use in aircraft

  • Consumer goods - watches, spectacle frames, jewellery etc.

  • Products for ships and marine use

  • Sports and recreation equipment, including golf clubs and bicycle frames

  • Foil for honeycomb applications

Weldability

Grade 9 Titanium has good welding characteristics.

UNS Number

R56320

Composition

Alpha structure Titanium Alloy with alloying elements; 0xygen: ≤0.15, Nitrogen: ≤0.02, Carbon: ≤0.08, Hydrogen: ≤0.015, Iron: ≤0.25, Aluminium: 2.50-3.50, Vanadium: 0.20-0.30

Machinability

Grade 9 Titanium is not best suited to machining. The best results are achieved using slow speeds, accurate cooling flow and high feed rates.

Common Names

Ti-3Al-2.5V

Grade 18

Common Shapes

Grade 18 Titanium is commonly available in:

  • Plates

  • Welded Tubes and Pipes 

  • Wire

  • Seamless Tubes

  • Ingot

  • Billet

  • Foil

Characteristics

  • Palladium enhanced version of Grade 9 Alloy

  • Maintains equivalent mechanical properties and fabricability of Grade 9 Alloy

  • Elevated resistance to neat reducing acids and crevice corrosion in hot brine media

Uses

  • Machinery used in Chemical processing

  • Equipment for geothermal brine energy extraction

  • Products used for hydromatallurgical extraction

  • Offshore hydrocarbon production

  • Hydrocarbon production

Weldability

Grade 18 Titanium has very good welding characteristics

UNS Number

R56322

Composition

Alpha structure Titanium Alloy with alloying elements; 0xygen: ≤0.15, Nitrogen: ≤0.03, Carbon: ≤0.08, Hydrogen: ≤0.015, Iron: ≤0.25, Aluminium: 2.50-3.50, Vanadium: 2.30-3.00, Palladium: 0.04-0.08

Machinability

Grade 18 Titanium is not best suited to machining. The best results are achieved using slow speeds, accurate cooling flow and high feed rates.

Grade 28

Common Shapes

Grade 28 Titanium is commonly available in:

  • Plate

  • Welded Tubes and Pipes 

  • Wire

  • Seamless Pipes

  • Ingot

  • Billet

Weldability

Grade 28 Titanium has good weldability, although special alloy-specific filler must be used.

Machinability

Grade 28 Titanium is not best suited to machining. The best results are achieved using slow speeds, accurate cooling flow and high feed rates.

UNS Number

R56323

Composition

Alpha structure Titanium Alloy with alloying elements; 0xygen: ≤0.15, Nitrogen: ≤0.03, Carbon: ≤0.08, Hydrogen: ≤0.015, Iron: ≤0.25, Aluminium: 2.50 - 3.50, Vanadium: 2.00-3.00, Ruthenium: 0.08-0.14

Uses

  • Applications exposed to seawater

  • Environments exposed to attack by high crevice corrosion temperatures

Characteristics

  • Ruthenium enhanced version of Grade 9 Alloy

  • Maintains equivalent mechanical properties and fabricability of Grade 9 Alloy

  • Approved for sour service to NACE MR-01-75 standard

Grade 6

Common Shapes

Grade 6 Titanium is commonly available in:

  • Sheet

  • Billet

  • Bar

  • Ingot

Characteristics

  • High strength

  • Good high temperature microstructure stability and strength, oxidation and creep resistance

  • Good fabricability

Uses

  • Cryogenic applications

  • Airframes

  • Jet engine components

  • Gas turbine components

Weldability

Grade 6 Titanium has excellent welding characteristics.

UNS Number

R54520

Composition

Alpha structure Titanium Alloy with alloying elements; 0xygen: ≤0.20, Nitrogen: ≤0.05, Carbon: ≤0.08, Hydrogen: ≤0.02, Iron: ≤0.50, Aluminium: 4.00-6.00, Selenium: 2.00-3.00. 

Machinability

Grade 6 Titanium is not best suited to machining. The best results are achieved using slow speeds, accurate cooling flow and high feed rates.

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An Introduction

Alpha and Near-Alpha Titanium Alloys are the traditional high temperature alloys. They have a near-single phase structure, giving them excellent creep characteristics, whilst offering the good strength of Alpha-Beta Alloys (up to 600MPa). The predominant alloying element in Near-Alpha Alloys is Aluminium, providing excellent strength and resistance to oxidation, at high temperatures. It was during the research into Near-Alpha Alloys that the detrimental phenomenon of Ti₃Al was discovered. The way this stress corrosion occurance is avoided is to cap Aluminium content at 6% for the standard alloys, although specialist alloys can still feature up to 9%. Included Alpha phase stabilisers in Alpha and Near-Alpha Alloys are Oxygen, Nitrogen and Carbon, whilst Beta isomorpheous and eutectic elements Molybdenum, Vanadium, Iron, Nickel, Hydrogen and Silicon also feature.

 

All grades, shapes and specifications of Near-Alpha Titanium Alloys are available directly through Integ Metals, so please feel free to read through the information on this page for reference, or contact us directly with your requirements. 

 
 
 
 
 
 
 
 
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