Titanium CP1 – Grade 4
Commercially Pure Titanium Grade 4 is stronger than CP Grades 2 & 3 – it can be cold formed, but has lower ductility. It has excellent corrosion resistance in a wide variety of environments. Grade 4 titanium is commonly used in Aerospace, Industrial and Medical applications where high strength is needed.
Applications
Aerospace, Chemical process, Industrial, Marine, Medical
Standards
ASME SB-363, ASME SB-381, ASME SB-337, ASME SB-348, ASTM F-67, AMS 4921, ASME SB-265, AMS 4901, ASME SB-338
Forms Available
Bar, Forgings, Sheet, Welding Wire, Wire
Grade 4
Grade 4 is known as the strongest of the four grades of commercially pure titanium. It is also known for its excellent corrosion resistance, good formability and weldability.
Though it is normally used in the following industrial applications, Grade 4 has recently found a niche as a medical grade titanium. It is needed in applications in which high strength is required:
- Airframe components
- Cryogenic vessels
- Heat exchangers
- CPI equipment
- Condensor tubing
- Surgical hardware
- Pickling baskets
APPLICATIONS
- Bellows
- aircraft structural honeycomb
- gaskets
- aircraft skin
- heat exchanger parts
- implantable battery cathodes/connectors
- stamped or etched fabrications
DESCRIPTION
Commercially Pure Titanium Grade 4 is the highest strength pure unalloyed Titanium with high oxygen and extra high strength. Grade 4 displays the highest strength of all the unalloyed CP grades. It combines excellent corrosion resistance with good formability and weldability. Mainly used in hydraulic and instrumentation tubing. Generally chosen for its corrosion resistance in a variety of chemical process equipment as well as marine and airframe applications. It can be used for parts requiring strength up to 400 ° F and oxidation resistance to 600 ° F.
CHEMISTRY TYPICAL
Titanium: Balance
Iron: 0.50 max
Oxygen: 0.40 max
Carbon: 0.80 max
Nitrogen: 0.05 max
Hydrogen: 0.015 max
Residuals each 0.10 max, total 0.40 maxCOMMON TITANIUM GRADE NAMES
Name Code
Description 1 Description 2 ASTM AMS UNS Grade 4 Titanium TI75A Unalloyed Titanium Commercially Pure Titanium 4901 R50700
PHYSICAL PROPERTIES
Density: 0.163 lbs/in3 (4.51 g/cm3)
Mean Coefficient of Thermal Expansion, in/inl° F (mm/ml° C):
70 - 212 ° F (20 - 100 ° C) 4.78 x 10·6 (8.6)
Thermal Conductivity: BTU-in/h-ft-° F (W/m-° K): At 70 ° F (21 °C): 119 (17.2)Modulus of Elasticity, ksi (MPa) 15.2 x 103 (105 x 103) in tension
Melting Point: 3020 ° F (1660 °C)FORMS
Coil - Strip, Foil, Ribbon
Wire - Profile, Round, Flat, SquareMECHANICAL PROPERTIES AT ROOM TEMPERATURE
PROPERTIES ANNEALED:
Ultimate Tensile Strength: 80 KSI min (552 MPa min)
Yield Strength (0.2% offset): 70 - 90 KSI (483 - 655 MPa )
Elongation: 15% minPROPERTIES: TEMPERED
Titanium Grade 4 can be cold rolled to various tempers. Contact Ulbrich Technical Service for additional information.
ADDITIONAL PROPERTIES
CORROSION RESISTANCE
Refer to NACE (National Associate of Corrosion Engineers) for recommendations.
FINISHES
#1 - Hot rolled annealed and descaled. It is available in strip, foil and ribbon. It is used for applications where a smooth decorative finish is not required.
#2D - Dull finish produced by cold rolling, annealing and descaling. Used for deep drawn parts and those parts that need to retain lubricants in the forming process.
#2B - Smooth finish produced by cold rolling, annealing and descaling. A light cold rolling pass is added after anneal with polished rolls giving it a brighter finish than 2D.
#BA - Bright annealed cold rolled and bright annealed
#CBA - Course bright annealed cold rolled matte finish and bright anneal
#2 - Cold Rolled
#2BA- Smooth finish produced by cold rolling and bright annealing. A light pass using highly polished rolls produces a glossy finish. A 2BA finish may be used for lightly formed applications where a glossy finish is desired in the formed part.
Polished - Various grit finish for specific polish finished requirements.
* Not all finishes are available for all alloys- Contact Ulbrich Sales for more information.WIRE FINISHES
XC - Extra clean. Bright annealed or bright annealed and cold rolled Grease - Ultra bright finish for decorative applications
Soap - Soap is not removed from tempered wire to act as a lubricant. * Contact Ulbrich Wire for custom finishes.HEAT TREATMENT
Titanium Grade 4 can only be hardened by cold work.
WELDING
For best results refer to: SSINA's "Welding of Stainless Steels and Other Joining Methods".
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