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TITANIUM GRADE 4 COMPOSITION

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Titanium CP Grade 4

Related Metals:

Allvac 70(tm)
Commercially Pure Grade 4
RMI 70(tm)
Timetal(r) 35A
Timetal(r) 35A(tm)                                    

Specifications:

AMS 4901
AMS 4921
ASTM B265
ASTM B348
ASTM B381
ASTM F467 (Ti-4)
ASTM F468 (4)
ASTM F67
ASTM F67 (4)
MIL F-83142
MIL T-81556
MIL T-9046
MIL T-9047
UNS R50700

Chemistry Data

Carbon

0.1 max

Hydrogen

0.015 max

Iron

0.5 max

Nitrogen

0.05 max

Oxygen

0.4 max

Titanium

Balance

General Information

Principal Design Features

Grade 4 displays the highest strength of all the unalloyed grades. It combines excellent corrosion resistance with good formability and weldability. While mill availability is not a problem, distributor availability is limited and should be a considerati


Applications

Generally chosen for its corrosion resistance in a variety of chemical process equipment as well as marine and airframe applications.


Machinability

As a family, titanium and its alloys have developed a mystique as a nightmare to machine. This is simply not the case. Experienced operators have compared its characteristics to those found in 316 stainless steel. Recommended practice includes high coolan


Forming

May be hot or cold formed using hydropress, power brake, stretch or drop hammer methods. Similar in characteristics to 300 series stainless steels.


Corrosion Resistance

Good resistance in neutral to oxidizing environments, including chlorides.


Welding

Rated as "good" in terms of weldability.


Heat Treatment

Not hardenable by heat treatment.


Forging

Roughing operations can begin at 935 C (1715 F),while finishing should be performed at 843 C(1550 F).


Hot Working

Hot forming will reduce both the springback and required forming forces, and will increase the overall ductility of the material.


Cold Working

The cold work characteristics of this material is similar to that of a moderately tempered austenitic stainless steel. In multiple cold forming operations, intermediate stress relief is recommended to prevent tearing or other material damage. Post-work an


Annealing

Heat to 704 C (1300 F),hold for 2 hours follow by air cooling. For intermediate stress relieving, heat to 482-538 C(900-1000 F) and hold for 45 minutes.


Other Physical Props

Beta Transus (F +/- 25) 1740


Physical Data

Density (lb / cu. in.)

0.163

Specific Heat (Btu/lb/Deg F - [32-212 Deg F])

0.129

Electrical Resistivity (microhm-cm (at 68 Deg F))

60

Melting Point (Deg F)

3020

Thermal Conductivity

9.8

Modulus of Elasticity Tension

15.1

Reduction of Area

25

Mechanical Data

Form

Sheet

Condition

Test Specimen Annealed

Temper

70

Tensile Strength

80

Yield Strength

70

Elongation

15

Reduction of Area

25


Form

Sheet

Condition

Test Specimen Annealed

Temper

600

Tensile Strength

44

Yield Strength

24

Elongation

18

Reduction of Area

75


Form

Sheet

Condition

Test Specimen Annealed

Temper

1000

Tensile Strength

27

Yield Strength

16

Elongation

29

Reduction of Area

75

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