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Material
U20702
Standard
GB /T 699-1999
Quality Carbon Structural Steels
Standard
GB /T 699-2015
Quality carbon structure steels
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
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
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 4354-2008
Hot rolled quality carbon steel wire rods
70
(
U20702
)
(
70#
)
Min
Max
For Reference Only
