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Standard

Steel Grade

C

Si

Mn

P

S

EN 10305-1

E215

≤0.10

≤0.05

≤0.70

≤0.025

≤0.025

E235

≤0.17

≤0.35

≤1.20

≤0.025

≤0.025

E355

≤0.22

≤0.55

≤1.60

≤0.025

≤0.025

DIN 2391

St35

≤0.17

≤0.35

≥0.40

≤0.025

≤0.025

St37.4

≤0.17

≤0.35

≥0.40

≤0.025

≤0.025

St45

≤0.21

≤0.35

≥0.40

≤0.025

≤0.025

St52

≤0.22

≤0.55

≤1.60

≤0.025

≤0.025

GB/T 3639

10

0.07-0.13

0.17-0.37

0.35-0.65

≤0.030

≤0.030

20

0.17-0.23

0.17-0.37

0.35-0.65

≤0.030

≤0.030

35

0.32-0.39

0.17-0.37

0.50-0.80

≤0.030

≤0.030

45

0.42-0.50

0.17-0.37

0.50-0.80

≤0.030

≤0.030

Q345B

≤0.20

≤0.50

≤1.70

≤0.030

≤0.030

Triangle Steel Tube

Outer (mm)

Inner (mm)

H

S

H

S

1S

32.4

2.5

26.6

3.5

2S

36.1

3.4

29

4

4S

43.4

3.3

36.1

4.4

5S

51.3

2.9

44.7

4

6S

53.6

3.8

44.7

4

7S

53.6

3.8

44.7

5.5

8S

62.7

4

53.6

4.5

9S

62.7

4

53.6

5.5

Material:

SAE1010 , SAE1020 , SAE1035 , SAE1045 , ST37.0 , ST44 , ST52 , E235 , E355

Grade:

BS, JIS, GB, DIN, ASTM, API,

Shape:

Lemon

Wall thickness:

0.5-50mm

Length:

up to 12m, or according to customer's requirement. 

Outer diameter:

Round: 5-420mm

Diameter and wall thickness could be at customer's request.

Technology:

Cold Draw/Cold Rolled

Surface treatment:

painted,galvanized,or oiled according to customer's requirement

Application:

Lighting,furniture,medical equipments

Place of origin:

China

Application

Mechanical structure, Carbon pressure machinery etc.