En40B - BS 970-1955

Grade	En40B
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	Alloy Steel

En40B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo
Minimum Value	0.2	0.1	0.4	-	-	2.9	-	0.4
Maximum Value	0.3	0.35	0.65	0.05	0.05	3.5	0.4	0.7

En40B Mechanical Properties

diameter or width across flats d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW	Impact Energy Absorption KV2 J
Bars, billets, forgings; d≤152.4	Quenching and Tempering R	≥695	≥525	≥22	201~255	≥54
Bars, billets, forgings; d≤152.4	Quenching and Tempering S	≥772	≥587	≥20	223~277	≥54
Bars, billets, forgings; d≤152.4	Quenching and Tempering (T)	≥894	≥679	≥18	248~302	≥54
Bars, billets, forgings; d≤152.4	Quenching and Tempering U	≥926	≥741	≥17	269~321	≥47

• 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

En40B Corresponding Standards(Same grade name, different standards)

1	BS
	EN40B
2	BS 970-1955
	En40B

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!