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Silicone Manganese Steels

Steel	BS 970 1991	BS 970 1983	BS 970 1955 EN	AISI / SAE	Werkstöff	Kerzname
250A53	–	–	45	9255	1.0904	55 SI 7
250A58	–	–	45A	9260	1.0909	60 SI 7
250A61	–	–	45B	9260	1.0909	60 SI 7

These Comparison Charts are based on chemical composition and type analysis. Mechanical properties have not been taken into account although in many cases may be similar. The information in the charts should therefore be used for guidance only.