En59 - BS 970-1955

Grade	En59
Corresponding Standard	BS 970-1955 Wrought steels in the form of bars, billets and forgings up to 6 in. ruling section for automobile and general engineering purpose
Classification	Martensitic Stainless Steel

En59 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni
Minimum Value	0.74	1.75	0.2	-	-	19	1.15
Maximum Value	0.84	2.25	0.6	0.03	0.03	20.5	1.65

En59 Mechanical Properties

diameter or width across flats d mm	Heat Treatment or Condition	Hardness HBW
Bar Stock, Square Billet, Forging	Quenching and Tempering	HRC: ≥47 HV: ≈480*

• d-diameter or width across flats/mm
• The unit conversion for strength is based on: 1tons/sq.in=15.44N/mm2
• The unit conversion for impact energy absorption is based on: 1ft.lb=1.3558J

En59 Corresponding Standards(Same grade name, different standards)

1	BS 970-4-1970
	(EN59) 443S65
2	BS 970-1955
	En59

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