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55
Standard ISO 683-18-1996 Heat-treatable steels, alloy steels and free-cutting steels
Standard GB /T 699-1999
Standard GOST 1050-1988 SIZED BARS MADE OF HIGH-QUALITY STRUCTURAL CARBON STEEL WITH A SPECIAL SURFACE FINISH


Chemical Composition(%)


Standard Material Designation Chemical Composition (%)
GB /T 699-1999 55
(U20552)
(55#)
 
Min
Max
ISO 683-18-1996
Heat-treatable steels, alloy steels and free-cutting steels
55
(C55E4)
 
Min
Max
GOST 1050-1988
SIZED BARS MADE OF HIGH-QUALITY STRUCTURAL CARBON STEEL WITH A SPECIAL SURFACE FINISH
55
 
Min
Max
For Reference Only