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| Material Designation | Standard | Same grade, different standards. | Source factory |
|---|---|---|---|
| Q550C | GB /T 1591-2008
Alloy Steel |
||
| Q460D | GB /T 1591-2008
Alloy Steel |
||
| Q690D | GB /T 1591-2008
Alloy Steel |
||
| Q550D | GB /T 1591-2008
Alloy Steel |
||
| Q550E | GB /T 1591-2008
Alloy Steel |
||
| Q460C | GB /T 1591-2008
Alloy Steel |
||
| Q345E | GB /T 1591-2008
Alloy Steel |
||
| Q690C | GB /T 1591-2008
Alloy Steel |
||
| Q500E | GB /T 1591-2008
Alloy Steel |
||
| Q390B | GB /T 1591-2008
Alloy Steel |
||
| Q620C | GB /T 1591-2008
Alloy Steel |
||
| Q345A | GB /T 1591-2008
Alloy Steel |
||
| Q500C | GB /T 1591-2008
Alloy Steel |
||
| Q345D | GB /T 1591-2008
Alloy Steel |
||
| Q345C | GB /T 1591-2008
Alloy Steel |
||
| Q460E | GB /T 1591-2008
Alloy Steel |
||
| Q690E | GB /T 1591-2008
Alloy Steel |
||
| Q420C | GB /T 1591-2008
Alloy Steel |
||
| Q345B | GB /T 1591-2008
Alloy Steel |
||
| Q390A | GB /T 1591-2008
Alloy Steel |