GB /T 699-1999 Quality Carbon Structural Steels
|
30
(U20302)
(30#)
|
|
GOST 1050-1988 SIZED BARS MADE OF HIGH-QUALITY STRUCTURAL CARBON STEEL WITH A SPECIAL SURFACE FINISH
|
30
|
|
GB /T 699-2015 Quality carbon structure steels
|
30
(U20302)
|
|
GB /T 3078-2019 Quality structural steel cold drawm bars
|
30
(30#)
|
|
GB /T 711-2017 Hot-rolled quality carbon structural steel plates sheets and strips
|
30
(30#)
|
|
GB /T 13237-2013 Cold rolled quality carbon sturctural steel sheets and strips
|
30
|
|
GB 3522-1983 Cold-rolled quality carbon structural steel strips
|
30
|
|
HB /Z 136-2000 Heat treatment process of aviation structural steel
|
30
|
|
GB /T 710-2008 Hot-rolled quality carbon structural steel sheets and strips
|
30
(U20302)
(30#)
|
|