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Standard GB /T 699-1999 Quality Carbon Structural Steels
Standard GB /T 699-2015 Quality carbon structure steels
Standard GOST 14959-1979 CARBONACEOUS AND ALLOYED SPRING ROLLED STEEL SPECIFICATIONS
Standard GB /T 4358-1995 Carbon spring steel wire for significant use
Standard GB /T 1222-2016 Spring steels
Standard GB /T 4354-2008 Hot rolled quality carbon steel wire rods
Standard GB /T 711-2017 Hot-rolled quality carbon structural steel plates sheets and strips
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 1222-2016
Spring steels
70
(U20702)
 
Min
Max
GB /T 699-1999
Quality Carbon Structural Steels
70
(U20702)
(70#)
 
Min
Max
GOST 14959-1979
CARBONACEOUS AND ALLOYED SPRING ROLLED STEEL SPECIFICATIONS
70
 
Min
Max
GB /T 699-2015
Quality carbon structure steels
70
(U20702)
 
Min
Max
GB /T 4358-1995
Carbon spring steel wire for significant use
70
(U20702)
 
Min
Max
GB /T 711-2017
Hot-rolled quality carbon structural steel plates sheets and strips
70
(70#)
 
Min
Max
GB /T 13237-2013
Cold rolled quality carbon sturctural steel sheets and strips
70
 
Min
Max
GB 3522-1983
Cold-rolled quality carbon structural steel strips
70
 
Min
Max
GB /T 4354-2008
Hot rolled quality carbon steel wire rods
70
(U20702)
(70#)
 
Min
Max
For Reference Only