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Material
U20652
Standard
GB /T 699-1999
Quality Carbon Structural Steels
Standard
GB /T 1222-2007
Spring Steels
Standard
GB /T 699-2015
Quality carbon structure steels
Standard
GB /T 1222-2016
Spring steels
Chemical Composition
(%)
Standard
Material Designation
Chemical Composition (%)
GB /T 1222-2007
Spring Steels
65
(
U20652
)
Min
Max
GB /T 699-1999
Quality Carbon Structural Steels
65
(
U20652
)
(
65#
)
Min
Max
GB /T 699-2015
Quality carbon structure steels
65
(
U20652
)
Min
Max
GB /T 1222-2016
Spring steels
65
(
U20652
)
Min
Max
For Reference Only
