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Help CenterGB/T 8162 SEAMLESS STEEL TUBES FOR STRUCTURAL PURPOSES
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GB 8162 SEAMLESS STEEL TUBES FOR STRUCTURAL PURPOSES
Main Steel Pipe Model
10, 20,35,45,20Mn,25Mn,Q345
Standard: GB8162 seamless steel tubes for structural purposes
Diamensional tolerances:
Types of steel tubes |
Outer diameters |
Wall thickness |
||
|
Cold-rolled/ cold drawn tubes |
Tube sizes(mm) |
Tolerances(mm) |
Tube sizes (mm) |
Tolerances(mm) |
15-80 |
±0.3mm or +/-1%OD |
<3 |
+15%/-10%WT or +/-0.15 |
|
>3 |
+12.5%/-10%WT or +-0.15 |
|||
Mechanical properties:
Standard codes |
steel |
Tensite strength(MPa) |
Yield strength(MPa) |
Elongation(%) |
Hardness |
GB8162 |
10 |
335~475 |
≥195 |
≥24 |
/ |
20 |
410~550 |
≥245 |
≥20 |
/ |
|
35 |
>510 |
>285 |
≥17 |
||
45 |
>590 |
>315 |
≥14 |
||
20Mn |
>450 |
>255 |
≥20 |
||
25Mn |
>490 |
>275 |
≥18 |
||
Q345 |
470-630 |
295-345 |
>20 |
/ |
Chemical composition:
Standard codes |
steel |
Chemical compositions (%) |
||||||
C |
Si |
Mn |
P |
S |
Cr |
Mo |
||
GB3087 |
10 |
0.07~0.13 |
0.17~0.37 |
0.38~0.65 |
≤0.030 |
≤0.030 |
|
|
20 |
0.17-0.23 |
0.35-0.65 |
≤0.030 |
≤0.030 |
||||
35 |
0.32-0.40 |
0.50-0.80 |
≤0.030 |
≤0.030 |
/ |
|||
45 |
0.42-0.50 |
0.50-0.80 |
≤0.035 |
≤0.035 |
≤0.25 |
|||
20Mn |
0.17-0.24 |
0.70-1.00 |
≤0.035 |
≤0.035 |
||||
25Mn |
0.22-0.29 |
0.70-1.00 |
≤0.035 |
≤0.035 |
≤0.25 |
|||
Q345B |
<0.20 |
1.00-1.60 |
≤0.030 |
≤0.030 |
||||
Manufacturer |
Hebei Province Gold Mysterious Pipe Co.,Ltd |
|
Process |
Seamless, Cold drawn /Cold rolled |
|
|
size |
Outer Diameter |
15-110mm |
Wall Thickness |
1-12mm |
|
Length |
max 12.5m |
|
Contact |
Elina Wong 86-0312-6721288 skype.....>jinaoguanye3 |
|
CUTTING SERVICE :cut slop less than 1.5mm
Straightness :1- 1.5mm/m
inspection:ET(EDDY CURRENT TEST)/UT
Send Inquiry to This Supplier
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