Chemical Composition (Mass fraction) (≤）  %

Grade

O

C

H

N

Nb

W

Mo

Si

Fe

Ti

Ni

Other

Ta

Ta1

0.01

0.005

0.002

0.005

0.04

0.03

0.001

0.002

0.002

0.005

0.002

0.001

Balance

Ta2

0.03

0.005

0.005

0.025

0.1

0.04

0.03

0.02

0.03

0.005

0.005

0.002

Balance

Mechanical Property

Product Name

Grade

Tensile Strength/MPa

Yield Strength/MPa

Elongation/%(Gauge length 25 or 50mm)

Ta tube

Ta1

≥210

≥140

≥25

Ta tube

Ta2

≥210

≥140

≥25

OD/MM

Diameter Tolerance

Thickness Allowable Deviation

＜25.4

±0.102

±10% of the wall thickness

25.5＜D＜38.1

±0.127

38.1＜D＜50.8

±0.152

50.8＜D＜63.5

±0.178

63.5＜D＜88.9

±0.254

Advantages

Disadvantages

Welding Tube

1. Uniform wall thickness and good inner surface quality

1. Poor flexibility, not suitable for the production of products with large specifications and small batches

2. High production efficiency and low cost

2. The weld is the weak link

3. Easy to produce large-diameter tubes

3. Welding seam cleaning is difficult

4. Short production cycle

4. Ovality is not easy to control

5.Product quality is easy to control

5. High requirements on the dimensional accuracy of all strips

Seamless Tube

1. Can produce small-scale tube and capillary materials

1. The uniformity of wall thickness is difficult to control

2. Good flexibility, suitable for the production of small batch and multi-specification products

2. Long production cycle and low yield

3. Uniform performance of each part of the tube

3. Complex equipment and large investment

4. It is difficult to produce large-diameter pipes