Seamless carbon steel tubes for liquid service
Application: for petrol, gas and other liquid transportation
Mechanical Properties
|
Standard |
Grade |
Tensile Point |
Yeild point |
Elongation |
|
GB/T8163 |
10 |
335-478 |
≥205 |
≥24 |
|
20 |
410-550 |
≥245 |
≥20 | |
|
Q345 |
490-665 |
≥325 |
≥21 |
Grade and chemical composition
|
Standard |
Grade |
Chemical composition | |||||
|
C |
Si |
Mn |
P |
S |
Cu | ||
|
GB/T8163 |
10 |
0.07-0.14 |
0.17-0.37 |
0.35-0.65 |
≤0.035 |
≤0.035 |
≤0.25 |
|
20 |
0.17-0.24 |
0.17-0.37 |
0.35-0.65 |
≤0.035 |
≤0.035 |
≤0.25 | |
|
Q345 |
0.12-0.20 |
0.20-0.55 |
1.20-1.60 |
≤0.045 |
≤0.045 |
| |
Dimension and tolerance
|
Way of producing |
OD |
WT | ||||
|
SIZE |
Tolerance |
Size |
Tolerance | |||
|
Normal |
Advanced |
Normal |
Advanced | |||
|
Hot rolled |
All |
+/-1.0%(min +/-0.5mm) |
All |
+15%, -12.5%(min +0.45mm, -0.40mm) | ||
|
Cold drawn |
6-10 |
+/-0.20mm |
+/-0.15mm |
≤1 |
+/-0.15mm |
+/-0.12 |
|
>10-30 |
+/-0.40mm |
+/-0.20mm |
>1-3 |
+15%, -10% |
+12.5%,-10% | |
|
>30-50 |
+/-0.45mm |
+/-0.30mm |
>3 |
+12.5%,10% |
+/-10% | |
|
>50 |
+/-1% |
+/-0.8% |
|
|
| |