Titanium Alloy Grades

 

Titanium Alloy Grades

Commercially Pure Titanium Grades And Their Properties

Grade Characteristics
Grade 1 Ductility and Weldability
Grade 2 Low Density
Grade 3 Excellent Corrosion Resistance
Grade 4 Highest Strength

Applications Of Corrosion Resistant Titanium Alloys

Applications Of Corrosion Resistant Titanium Alloys

Grade Application
Grade 5 Offshore oil & gas equipment
Grade 7 Chloride-containing environments
Grade 12 Pressure vessel construction

Table Of Content

Specification Of Titanium Alloy

Specifications Grade1 Grade 2 Grade 3 Grade 4
ISO 5832-2
SAE AMS 4900, AMS 4901, AMS 4941, AMS 4942, AMS 4951
MIL MIL-T-9046, MIL-T-9047, MIL-R-81556, MIL-R-81588, MIL-F-83142
ASME SB 265, SB 338, SB 363, SB 381, SB 384
ASTM B 265, B 338, B 348, B 363, B 367, B 381, B 861, F 67, F 467, F 468
DIN 17850, 17860, 17861, 17862, 17863, 17864, 17866, 1737
DIN-Designation Ti 1 Ti 2 Ti 3 Ti 4
Base Material-Number 3.7025 3.7035 3.7055 3.7065
DIN Filler Metal-No 3.7026 3.7036 3.7056 3.7066
Aerospace- DatasheetNumber 3.7024 3.7034 – 3.7064
UNS R50250 R50400 R50550 R50700
VdTÜV-Datasheet 230

Equivalent Titanium Alloy Grades Comparision

USA EN W.- Nr. Germany DIN – Germany UNS AFNOR – France BS – Great Britain
Grade 1 CP 4 Titan Grade 1 3.7025 Ti1 R50250 T35 2TA1
Grade 2 CP 3 Titan Grade 2 3.7035 Ti2 R50400 T40 IMI 125
Grade 3 CP 2 Titan Grade 3 3.7055 Ti3 R50550 T50 DTD5023
Grade 4 CP 1 Titan Grade 4 3.7065 Ti4 R50700 T60 TA4

Density Of Titanium Alloy

Grade Density Value
Grade 1 4.5g/cm3 (280 lb/ft3)
Grade 2 4.5g/cm3 (280 lb/ft3)
Grade 3 4.5g/cm3 (280 lb/ft3)
Grade 4 4.5g/cm3 (280 lb/ft3)

Hardness Of Titanium Alloy

Hardness Of Titanium Alloy

Chemical Composition Of Titanium Grade Comparision

Grade Carbon Max Oxygen Max Nitrogen Max Iron Max Aluminium Vanadium Palladium Molybdenum Nickel Hydrogen Max
Grade 1 0.08 0.18 0.03 0.2 – – – – – 0.015
Grade 2 0.08 0.25 0.03 0.3 – – – – – 0.015
Grade 3 0.08 0.35 0.05 0.3 – – – – – 0.015
Grade 4 0.08 0.4 0.05 0.5 – – – – – 0.015
Grade 5 0.08 0.2 0.05 0.4 5.5 – 6.75 3.5 – 4.5 – – – 0.015
Grade 7 0.08 0.25 0.03 0.3 – 0.12 – 0.25 – – 0.015
Grade 9 0.08 0.12 0.03 0.25 2.5 – 3.5 2.0 – 3.0 – – – 0.015
Grade 11 0.08 0.18 0.03 0.2 – – 0.12 – 0.25 – – 0.015
Grade 12 0.08 0.25 0.03 0.3 – – – 0.2 – 0.4 0.6 – 0.9 0.015
Grade 16 0.08 0.25 0.03 0.3 – – 0.04 – 0.08 – – 0.015
Grade 17 0.08 0.18 0.03 0.2 – – 0.04 – 0.08 – – 0.015
Grade 18 0.08 0.15 0.03 0.25 2.5 – 3.5 2.0 – 3.0 0.04 – 0.08 – – 0.015

Thermal Conductivity of Titanium Grade Comparision

Properties Grade 1 Grade 2 Grade 3 Grade 4
Thermal Conductivity 20W/m-K (11 BTU/h-ft-°F) 22W/m-K (13 BTU/h-ft-°F) 21W/m-K (12 BTU/h-ft-°F) 19W/m-K (11 BTU/h-ft-°F)
Melting Onset 1610°C (2930 °F) 1610°C (2930 °F) 1610°C (2930 °F) 1610°C (2930 °F)
Mechanical 320°C (600 °F) 320°C (600 °F) 320°C (600 °F) 320°C (600 °F)
Latent Heat of Fusion 420J/g 420J/g 420J/g 420J/g
Melting Completion 1660°C (3020 °F) 1660°C (3020 °F) 1660°C (3020 °F) 1660°C (3020 °F)
Specific Heat Capacity 540J/kg-K (0.13 BTU/lb-°F) 540J/kg-K (0.13 BTU/lb-°F) 540J/kg-K (0.13 BTU/lb-°F) 540J/kg-K (0.13 BTU/lb-°F)
Thermal Expansion 8.8µm/m-K 9.0µm/m-K 9.2µm/m-K 9.4µm/m-K

Mechanical Properties Of Titanium Grade Comparision

Mechanical Properties Of Titanium Grade Comparision

Grade ksi min Mpa min kis min/max Mpa mn/max Elongation in 2″
Grade 1 35 240 20/45 138/310 24
Grade 2 50 345 40/65 275/450 20
Grade 3 65 450 55/80 380/550 18
Grade 4 80 550 70/95 483/655 15
Grade 7 50 345 40/65 275/450 20
Grade 11 35 240 20/45 138/310 24
Grade 16 50 345 40/65 275/450 20
Grade 17 35 240 20/45 138/310 24

Titanium Grades List & Titanium Grades Composition

Grade Type Composition
Grade 1 Unalloyed –
Grade 2 Unalloyed –
Grade 2H Unalloyed –
Grade 3 Unalloyed –
Grade 4 Unalloyed –
Grade 5 Unalloyed 6% AI, 4 % V
Grade 6 Alloy 5% AI, 2.5 % Sn
Grade 7 Unalloyed –
Grade 7H Unalloyed –
Grade 9 Alloy 3% AI, 2.5 % V
Grade 11 Unalloyed –
Grade 12 Alloy 0.3% Mo, 0.8% Ni
Grade 14 Alloy 0.5 % Ni, 0.05 % Ru
Grade 15 Alloy 0.5 % Ni, 0.05 % Ru
Grade 16 Unalloyed –
Grade 16H Unalloyed –
Grade 17 Unalloyed –
Grade 18 Alloy 3% AI, 2.5 % V
Grade 19 Alloy 3% AI, 8% V, 6% Cr, 4 % Zr4 % Mo
Grade 20 Alloy 3% AI, 8% V, 6% Cr, 4 % Zr4 % Mo
Grade 21 Alloy 15% Mo, 3% AI, 2.7 % Nb, 0.25 % Si
Grade 23 Alloy 6% AI, 4% V
Grade 24 Alloy 6% AI, 4% V
Grade 25 Alloy 6% AI, 4% V
Grade 26 Unalloyed –
Grade 26H Unalloyed –
Grade 27 Unalloyed –
Grade 28 Alloy 3% AI, 2.5 % V
Grade 29 Alloy 6% AI, 4% V
Grade 32 Alloy 5% AI, 1% Sn, 1% V, 1% Zr0.8 % Mo
Grade 33 Alloy 0.4% Ni, 0.015% Pd 0.025 % Ru, 0.15 % Cr
Grade 34 Alloy 0.4% Ni, 0.015% Pd 0.025 % Ru, 0.15 % Cr
Grade 35 Alloy 4.5% AI, 2% Mo, 1.6% V, 0.5 % Fe, 0.3% Si
Grade 36 Alloy 45 % Nb
Grade 37 Alloy 1.5% AI
Grade 38 Alloy 4% AI, 2.5 % V, 1.5% Fe

AMS standard Of Titanium Alloy

Grades AMS Standard
Grade 1 –
Grade 2 AMS 4921, AMS 4942, ASM 4902
Grade 3 AMS 4921, AMS 4942, ASM 4902
Grade 4 AMS 4921, AMS 4901

Suitable Acids For Titanium Alloy

Suitable Acids For Titanium Alloy

  • Nitric Acid
  • Chromic Acid
  • Hydrochloric Acid
  • Phosphoric Acid
  • Sulfurous Acid
  • Mixed Acids
  • Other Inorganic Acids
  • Hydrofluoric Acid
  • Sulfuric Acid
  • Reducing Acids
  • Red Fuming Nitric Acid
  • Oxidizing Acids

Tensile Strength Of Titanium Grade Comparision

Tensile Strength
Grade Ultimate (UTS) Yield (Proof)
Grade 1 220 Mpa (32 x 103psi) 310Mpa (45 x 103 psi)
Grade 2 420 Mpa (62 x 103 psi) 360 Mpa (52 x 103 psi)
Grade 3 510 Mpa (74 x 103 psi) 440 Mpa (64 x 103 psi)
Grade 4 640 Mpa (93 x 103 psi) 530 Mpa (77 x 103 psi)

Titanium Corrosion Conditions In Electrolytes

Welding Types Optimization Method
Pulsed Response SurfaceMethodology
Pulsed Weibull Distribution
Pulsed Hooke-Jeeves
Pulsed Taguchi Method
Conventional Taguchi Method

Suitable Welding Consumable For Titanium Grades

Alloy Crossref. to 1.6mm 1.2mm 0.9mm 2.4mm 3.2mm Types
Ti Grade 2 Titanium Grade 2 – S 1mm – – MIG Wires
Ti Grade 2 Titanium Grade 2 S – S – TIG Rods
Ti Grade 5 Titanium Grade 5 – – S –
Ti Grade 7 Titanium Grade 7 – – S –
Ti Grade 12 Titanium Grade 12 – – S S

Corrosion Rate Comparison of Titanium Grades

Acid Applied Potential Volts (H2) Corrosion Rate mpy (mm/y) Reduction of Corrosion Rate Rate
40% Sulfuric 2.1 0.2 (0.005) 11,000X
37% Hydrochloric 1.7 2.7 (0.068) 2,080X
60% Phosphoric 2.7 0.7 (0.018) 307X
20% Sulfamic 1.4 0.2 (0.005) 2,710X
25% Oxalic 1.6 9.8 (0.250) 350X
50% Formic 0.7 3.3 (0.083) 70X
Titanium Grade selection for Autoclaves used in nickel refining plants

Titanium Grade selection for Autoclaves used in nickel refining plants

High-strength And Light Weight Titanium Alloy For HCI- And Chloride Chemical Plants

High-strength And Light Weight Titanium Alloy For HCI- And Chloride Chemical Plants