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


Chemical Composition(%)


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