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Material
40Mn
Standard
GB /T 699-1999
Quality Carbon Structural Steels
Standard
GB /T 699-2015
Quality carbon structure steels
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
Chemical Composition
(%)
Standard
Material Designation
Chemical Composition (%)
GB /T 699-1999
Quality Carbon Structural Steels
40Mn
(
U21402
)
Min
Max
GB /T 699-2015
Quality carbon structure steels
40Mn
(
U21402
)
Min
Max
GB /T 3078-2019
Quality structural steel cold drawm bars
40Mn
Min
Max
GB /T 711-2017
Hot-rolled quality carbon structural steel plates sheets and strips
40Mn
Min
Max
For Reference Only
