Difference Between Inconel and Titanium

Inconel Vs Titanium

If you not sure which material would be most suitable for your application, here we’ve writtent the content with main features & material properties that differentiate Difference Between Inconel and Titanium.

Inconel

Inconel® is a registered trademark (of Special Metals Corporation) referring to a family of austenitic nickel-chromium super alloys. Inconel® is a material that is specifically optimized for some of the toughest use conditions to be found in manufacturing while Titanium is a chemical element with symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, low density, and high strength.

Inconel Material Specification

  • Inconel 600: Solid solution strengthened.
  • Inconel 601
  • Inconel 625: Acid resistant, good weldability. The LCF version is typically used in bellows. Ideal for hardware and components in the power, aerospace and chemical processing industries. Offered in sheet, plate, bar and forgings.
  • Inconel 718: Gamma double prime strengthened with good weldability. The preferred material for cryogenic storage tanks, turbines, downhole shafts and wellhead parts offered in sheet, plate and bar.
  • Inconel X750: Commonly used for gas turbine components, including blades, seals and rotors.
  • Inconel 907
  • Inconel 909
  • Inconel 706
  • Inconel 617
  • Inconel 751: Increased aluminium content for improved rupture strength in the 1600 °F range.
  • Inconel 792: Increased aluminium content for improved high temperature corrosion properties, used especially in gas turbines.
  • Inconel 939: Gamma prime strengthened to increase weldability.
  • Inconel 188: Readily fabricated for commercial gas turbine and aerospace applications. Offered in sheet, plate and bar.
  • Inconel 690: Low cobalt content for nuclear applications, and low resistivity.
  • Inconel 713C: Precipitation hardenable nickel-chromium base cast alloy.
  • Inconel 230: Inconel 230 Plate & Sheet mainly used by the power, aerospace, chemical processing and industrial heating industries, Aerospace Materials.

Inconel Composition

Inconel Element (% by mass)
Ni Cr Fe Mo Nb Co Mn Cu Al Ti Si C S P B
600 72.0 14.0–17.0 6.0–10.0 1.0 0.5 0.5 0.15 0.015
617 44.2–56.0 20.0–24.0 3.0 8.0–10.0 10.0–15.0 0.5 0.5 0.8–1.5 0.6 0.5 0.15 0.015 0.015 0.006
625 58.0 20.0–23.0 5.0 8.0–10.0 3.15–4.15 1.0 0.5 0.4 0.4 0.5 0.1 0.015 0.015
690 59.5 30 9.2 0.35 0.01 0.02 0.35 0.019 0.003
718 50.0–55.0 17.0–21.0 balance 2.8–3.3 4.75–5.5 1.0 0.35 0.2–0.8 0.65–1.15 0.3 0.35 0.08 0.015 0.015 0.006
X-750 70.0 14.0–17.0 5.0–9.0 0.7–1.2 1.0 1.0 0.5 0.4–1.0 2.25–2.75 0.5 0.08 0.01

Inconel alloys

Alloys of inconel include:
  • Inconel 600: Solid solution strengthened
  • Inconel 601
  • Inconel 625: Acid resistant, good weldability. The LCF version is typically used in bellows.
  • Inconel 690: Low cobalt content for nuclear applications, and low resistivity
  • Inconel 713C: Precipitation hardenable nickel-chromium base cast alloy
  • Inconel 718: Gamma double prime strengthened with good weldability
  • Inconel 751: Increased aluminium content for improved rupture strength in the 1600 °F range
  • Inconel 792: Increased aluminium content for improved high temperature corrosion properties, used especially in gas turbines
  • Inconel 939: Gamma prime strengthened to increase weldability

Inconel Equivalent Grades

STANDARD WERKSTOFF NR. UNS GOST AFNOR JIS BS EN OR
Inconel 600 2.4816 N06600 МНЖМц 28-2.5-1.5 NC15FE11M NCF 600 NA 13 NiCr15Fe ЭИ868
Inconel 601 2.4851 N06601 ХН60ВТ NC23FeA NCF 601 NA 49 NiCr23Fe ЭИ868
Inconel 617 2.4663 N06617
Inconel 625 2.4856 N06625 ХН75МБТЮ NC22DNB4M NCF 625 NA 21 NiCr22Mo9Nb ЭИ602
Inconel 690 2.4642 N06690
Inconel 718 2.4668 N07718
Inconel 725 N07725
Inconel X-750 2.4669 N07750

Inconel Melting Point, Density and Tensile Strength

Grade Density Melting Point Tensile Strength Yield Strength
(0.2% Offset)
Elongation
600 8.47 g/cm3 1413 °C (2580 °F) Psi – 95,000 , MPa – 655 Psi – 45,000 , MPa – 310 40 %
601 8.1 g/cm3 1411 °C (2571 °F) Psi – 80,000 , MPa – 550 Psi – 30,000 , MPa – 205 30 %
617 8.3g/cm³ 1363°C ≥ 485 MPa ≥ 275 MPa 25 %
625 8.4 g/cm3 1350 °C (2460 °F) Psi – 135,000 , MPa – 930 Psi – 75,000 , MPa – 517 42.5 %
690 8.3g/cm³ 1363°C ≥ 485 MPa ≥ 275 MPa 25 %
718 8.2 g/cm3 1350 °C (2460 °F) Psi – 135,000 , MPa – 930 Psi – 70,000 , MPa – 482 45 %
725 8.31 g/cm3 1271°C–1343 °C 1137 MPa 827 MPa 20 %
X-750 8.28 g/cm3 1430°C 1267 MPa 868 MPa 25 %

Titanium

Specifications Titanium Grade 2 Titanium Alloy Inconel Grade 625 Stainless Steel 321 Stainless Steel 304
Temperature rating 450°C 800°C 1100°C 950°C 860°C
Typical Weight/M 3″ Tube 1.28kg 0.96-1.28kg 1.00-1.40kg 1.7-2.26kg 2.26kg
  • Titanium is lighter
  • Titanium is harder to mark and you will see less scratches.
  • Inconel is a bit stiffer than Titanium
Advantages of Titanium  
  • Highest strength to weight ration of any metal
  • High corrosion resistance
  • High fatigue resistance
  • Non-toxic
Disadvantages of Titanium
  • Material stiffness not as good as aluminum alloys or carbon fiber
  • Comparatively high cost
Grade Description
Titanium Grade 1 Unalloyed titanium, low oxygen, low strength
Titanium Grade 2 Unalloyed titanium, standard oxygen, medium strength
Titanium Grade 3 Unalloyed titanium, medium oxygen, high strength
Titanium Grade 4 Unalloyed titanium, high oxygen, extra high strength
Titanium Grade 5 Titanium alloy (6% aluminum, 4% vanadium)
Titanium Grade 7 Unalloyed titanium plus 0.12% to 0.25% palladium, standard oxygen, medium strength
Titanium Grade 9 Titanium alloy (3% aluminum, 2.5% vanadium), high strength. Mainly aerospace applications
Titanium Grade 11 Unalloyed titanium plus 0.12% to 0.25% palladium, low oxygen, low strength
Titanium Grade 12 Titanium alloy (0.3% molybdenum, 0.8% nickel), high strength
Titanium Grade 13 Titanium alloy (0.5% nickel, 0.05% ruthenium), low oxygen
Titanium Grade 14 Titanium alloy (0.5% nickel, 0.05% ruthenium), standard oxygen
Titanium Grade 15 Titanium alloy (0.5% nickel, 0.05% ruthenium), medium oxygen
Titanium Grade 16 Unalloyed titanium plus 0.04% to 0.08% palladium, standard oxygen, medium strength
Titanium Grade 17 Unalloyed titanium plus 0.04% to 0.08% palladium, low oxygen, low strength
Titanium Grade 18 Titanium alloy (3% aluminum, 2.5% vanadium plus 0.04% to 0.08% palladium)
Titanium Grade 19 Titanium alloy (3% aluminum, 8% vanadium, 6% chromium, 4% zirconium, 4% molybdenum)
Titanium Grade 20 Titanium alloy (3% aluminum, 8% vanadium, 6% chromium, 4% zirconium, 4% molybdenum) plus 0.04% to 0.08% palladium
Titanium Grade 21 Titanium alloy (15% molybdenum, 3% aluminum, 2.7% niobium, 0.25% silicon)
Titanium Grade 23 Titanium alloy (6% aluminum, 4% vanadium, extra low interstitial, ELI)
Titanium Grade 24 Titanium alloy (6% aluminum, 4% vanadium) plus 0.04% to 0.08% palladium
Titanium Grade 25 Titanium alloy (6% aluminum, 4% vanadium) plus 0.3% to 0.8% nickel and 0.04% to 0.08% palladium
Titanium Grade 26 Unalloyed titanium plus 0.08% to 0.14% ruthenium, standard oxygen, medium strength
Titanium Grade 27 Unalloyed titanium plus 0.08% to 0.14% ruthenium, low oxygen, low strength
Titanium Grade 28 Titanium alloy (3% aluminum, 2.5% vanadium) plus 0.08% to 0.14% ruthenium
Titanium Grade 29 Titanium alloy (6% aluminum, 4% vanadium with extra low interstitial elements (ELI) plus 0.08% to 0.14% ruthenium

Titanium & Titanium Alloys ASTM Specifications

ASTM SpecificationDescription
ASTM-F136-98e1Wrought Titanium-6 Aluminum-4 Vanadium ELI (Extra Low Interstitial) Alloy (UNSR56401) for Surgical Implant Applications
ASTM-F67-00Unalloyed Titanium for Surgical Implant Applications (UNS R50250, UNS R50400, UNS R50550, UNS R50700)
ASTM-F1108-97aTi6AL4V Alloy Castings for Surgical Implants (UNS R56406)
ASTM-F-620-00Alpha Plus Beta Titanium Alloy Forgings for Surgical Implants
ASTM-F1472-99Wrought Titanium-6 Aluminum-4 Alloy for Surgical Implant Applications (UNS R56400)
ASTM-F1341-99Unalloyed Titanium Wire UNS R50250, UNS R50400, UNS R50550, UNS R50700, for Surgical Implant Applications
ASTM-F1295-97aWrought Titanium-6 Aluminum-7 Niobium Alloy for Surgical Implant Applications (UNS R56700)
ASTM B265-99Titanium and Titanium Alloy Strip, Sheet, and Plate
ASTM-B299-99Titanium Sponge
ASTM-B338-99Seamless and Welded Titanium & Titanium Alloy Tubes for Condensers & Heat Exchangers
ASTM-B348-00Titanium and Titanium Alloy Bars and Billets
ASTM-B363-00Seamless and Welded Unalloyed Titanium & Titanium Alloy Welding Fittings
ASTM-B367-93 (1998)Titanium and Titanium Alloy Castings
ASTM-B381-00Titanium and Titanium Alloy Forgings
ASTM-B600-91 (1997)e1Standard Guide for Descaling and Cleaning Titanium & Titanium Alloy Surfaces
ASTM-B861-00Titanium and Titanium Alloy Seamless Pipe
ASTM-B862-99Titanium and Titanium Alloy Welded Pipe
ASTM-B863-99aTitanium and Titanium Alloy Wire
Brinell Hardness Rockwell B Scale Rockwell C Scale Approximate Tensile (lbs. psi) Brinell Hardness Rockwell B Scale Approximate Tensile (lbs. psi)
65362324,00021795103,000
62760311,00021296103,000
60168306,00020795101,000
57857290,0002029498,000
55556284,0001979396,000
53454270,0001929293,000
51453263,0001879191,000
49551250,0001839089,000
47750243,0001798987,000
46149236,0001748885,000
44447223,0001708783,000
42947217,0001668681,000
41545211,0001638580,000
40142194,0001598478,000
38841188,0001568377,000
37540182,0001538276,000
36338171,0001498175,000
35237166,0001468074,000
33136162,0001437973,000
32134153,0001407871,000
31133148,0001377770,000
30232144,0001347669,000
29331140,0001317467,000
28530136,0001287366,000
27729132,0001267265,000
26928129,0001247163,000
26227126,0001217062,000
25525120,0001186961,000
24824117,0001166860,000
24110023115,0001146759,000
2359922112,0001126658,000
2299821110,0001096557,000
2239720108,0001076455,000

Titanium Gauge Conversion

Gauge NumbersUS StandardsGauge NumbersUS Standards
00.312160.0625
10.281170.0562
20.266180.05
30.25190.0438
40.234200.0375
50.219210.0344
60.203220.0312
70.188230.0281
80.172240.025
90.156250.0219
100.141260.0188
110.125270.0172
120.109280.0156
130.0938290.0141
140.0781300.0125
150.0703  
Titanium Equivalent Grades
STANDARD WERKSTOFF NR. UNS
Titanium Gr 1 3.7025 R50250
Titanium Gr 2 3.7035 R50400
Titanium Gr 5 3.7165 R56400
Titanium Gr 7 3.7235 R52400
Titanium Gr 9 3.7195 R56320
Titanium Gr 12 3.7105 R53400
Titanium Chemical Composition
Titanium Gr 2 0.10 max 0.03 max 0.25 max 0.015 max bal 0.30 max
Titanium Gr 5 0.10 max 0.05 max 0.20 max 0.015 max bal 0.30 max (V: 3.5-4.5, Al: 5.5-6.75)
Titanium Hardness and Tensile Strength
Titanium Gr 2 50 (Min.Tensile) 40 (Min.Yield) 14.9 103 GPa 0.34-0.10
Titanium Gr 5 130 (Min.Tensile) 120 (Min.Yield) 16.4 114 GPa 0.30-0.33
Grade C N O H Ti Fe
Titanium Gr 1 .08 max .03 max .18 max .015 max bal .20 max
Titanium Gr 4 .08 max .05 max .40 max .015 max bal .50 max
Titanium Gr 7 .08 max .03 max .25 max .015 max bal .30 max
Titanium Gr 9 .08 max .03 max .15 max .015 max .25 max
Titanium Gr 12 .08 max .03 max .25 max 0.15 max .30 max

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