Titanium tubes according to GOST 22897-86

Seamless titanium alloy cold-finished tubes 

        Titanium tubes are to be produced seamless, cold-finished of titanium alloys VT1-0, PT-1M, PT-7M, OT-4.

 

 

External diameter of titanium tubes, mm

Wall thickness of titanium tubes, mm

Length of titanium tubes, m

5,8

1,0 – 1,5

Random 1,0-8,0

fixed in random length range

 

6,0 – 9,0

0,5 –1,5

10,0 – 12,0

0,5 – 2,0

13,0 – 16,0

0,5 – 2,8

18,0 – 21,0

0,5 – 3,0

22,0 – 27,0

0,5 – 3,5

28,0 – 30,0

0,5 – 4,0

32,0 – 40,0

0,5 – 5,0

42,0

0,5 – 6,0

45,0 – 76,0

0,5 – 7,0

80,0 – 89,0

0,6 – 9,0

90,0 – 120,0

4,0 – 6,0

It is possible to produce titanium  tubes with maximum external diameter 121,0 mm and maximum wall thickness 14,0 mm due to technical agreement with the Customer.

 

Chemical composition of titanium tubes

Alloy grade of

titanium tubes

Standard of titanium

Chemical composition of titanium tubes, % not more than

Ti

Al

C

Si

Fe

N

O

H

Zr

Mn

admixtures

PT-1M

ОСТ 1 92077-91

base

0,2-0,7

0,07

0,10

0,20

0,04

0,12

0,008

0,30

-

0,30

PT-7M

GOST 19807-91

base

1,8-2,5

0,10

0,12

0,25

0,04

0,15

0,008

2,0-3,0

-

0,30

VT1-0

GOST 19807-91

base

-

0,07

0,10

0,25

0,04

0,20

0,008

-

-

0,30

ОТ-4

GOST 19807-91

base

3,5-5,0

0,10

0,12

0,30

0,05

0,15

0,012

0,30

0,8-2,0

0,30

In alloy VT1-0 admissible content of aluminium is up to 0,7%.

Hydrogen content is indicated according to requirements of standard.

 

Mechanical properties of titanium tubes

Alloy grade of

titanium tubees

At t 20 °C

At t 150 °C

At t 350 °C

Temporary tensile strength, MPa

Yield strength, MPa

Relative elongation,%

Temporary tensile strength, MPa

Yield strength, MPa

Temporary tensile strength, MPa

Yield strength, MPa

not less than

PT-1M

343-568

216

27

225

157

-

-

PT-7M

480-666

372

20

-

-

235

-

VT1-0

 343-568 245 24 216 147 - -

ОТ-4

 686-833 - 10 - - - -

 

Tests

Titanium tubes are to be tested by flattening, expansion and 100% ultrasonically tested, hydrostatic pressure in titanium  tubes is guaranteed.