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   Site:Home >> Products Showing >> Shaped Steel Tube

Shaped Steel Tube

Chemical Composition Table Of Cold-drawn Shaped Steel Tube
Standard Steel Grade C Si Mn P< S< Cr< Ni< Cu<
GB/T 3094 10 0.07-0.13 0.17-0.37 0.35-0.65 0.035 0.035 0.15 0.30 0.25
20 0.17-0.23 0.17-0.37 0.35-0.65 0.035 0.035 0.25 0.30 0.25
35 0.32-0.39 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.30 0.25
45 0.42-0.50 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.30 0.25
Q195A 0.06-0.12 ≤0.30 0.25-0.50 0.045 0.050 - - -
Q215A 0.09-0.15 ≤0.30 0.25-0.55 0.045 0.050 - - -
Q235A 0.14-0.22 ≤0.30 0.30-0.65 0.045 0.050 - - -
Q295A ≤0.16 ≤0.55 0.80-1.50 0.045 0.045 - - -
Q345A ≤0.20 ≤0.55 1.00-1.60 0.045 0.045 - - -
Q390A ≤0.20 ≤0.55 1.00-1.60 0.045 0.045 - - -
DIN 1629 St37.0 ≤0.17 0.17-0.37 0.35-0.65 0.035 0.035 0.25 0.25 0.25
St44.0 ≤0.21 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.25 0.25
St55 0.33-0.41 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.25 0.25
St52.0 ≤0.22 ≤0.55 ≤1.60 0.035 0.035 0.25 0.25 0.25
CK45 0.42-0.50 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.25 0.25

 

The Demension And Tolerance's Table Of Cold-drawn Shaped Steel Tube
Demension(mm) Allowed Tolerance
Ordinary Level High

Side Length

≤30 ±0.30 ±0.20
>30~50 ±0.40 ±0.30
>50~75 ±0.80% ±0.70%
>75 ±1.00% ±0.80%

Wall Thickness

≤1 ±0.18 ±0.12
>1~3

+15%

-10%

+12.5%

-10.0%

>3

+12.5%

-10.0%

±10%
Outside Corner Radius
Wall Thickness S≤6 6<S≤10 S>10
Outside Corner Radius ≤2.0S ≤2.5S ≤3.0S
Convex Side Degrees
Demension's Side Length Convex Side Degrees
min
Ordinary Level
General
High
High

≤30

>30~50

>50~75

>75

0.20

0.30

0.80%

0.90%

0.10

0.15

0.50%

.60%

Curvature
Precision Grade Curvature Total Curvature

Ordinary Level

High

≤4.0

≤2.0

≤0.4

≤0.2

 Note: The level of precision should be specified in the contract, if not marked, we will delivery in general level.
Reversing
Side Length Of Steel Tube Allowed

≤30

>30~50

≤1.5

≤2.0

>50~75

>75

≤2.5

≤3.0

 

Mechanical Properties' Table Of Cold Drawn Shaped Steel Tube
         
Standard Steel Grade

Tensile Strength

σb(Mpa)

Yield Point

σs(Mpa)

Elongation

δ5 %

Min
GB/T 3094 10 335 205 24
20 390 245 20
35 510 305 17
45 590 335 14
Q195 315 195 22
Q215 335 215 22
Q235 375 235 20
Q295 430 295 22
Q345 510 315 21
Q390 530 390 18
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