En8 - BS 970-1955

Grade	En8
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	Carbon Steel

En8 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.35	0.05	0.6	-	-
Maximum Value	0.45	0.35	1	0.06	0.06

En8 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
Bar, bloom, forging; d≤152.4	NGC1+(N)	≥540	≥278	≥20	152~207	-
Bars, Billets, Forgings; d≤63.5	NGC1+(Q)	≥618	≥432	≥22	179~229	≥14
Bars, billets, forgings; d≤22.2	NGC1+(R)	≥695	≥494	≥20	201~255	≥14
Bar, bloom, forging; d≤152.4	NGC2+(N)	≥540	≥278	≥17	152~207
Bars, Billets, Forgings; d≤63.5	NGC2+(Q)	≥618	≥432	≥17	179~229
Bars, billets, forgings; d≤22.2	NGC2+(R)	≥695	≥494	≥17	201~255
Bar, billet, forged product; d ≤ 101.6	GC1+(N)	≥540	≥278	≥20	152~207	≥27
Bar, bloom, forging; d≤152.4	GC1+(N)	≥540	≥278	≥20	152~207	≥20
Bars, Billets, Forgings; d≤63.5	GC1+(Q)	≥618	≥432	≥22	179~229	≥34
Bars, billets, forgings; d≤12.7	GC1+(R)	≥695	≥494	≥20	201~255	≥54
Bars, billets, forgings; d≤22.2	GC1+(R)	≥695	≥494	≥20	201~255	≥34
Bar, bloom, forging; d≤152.4	GC2+(N)	≥540	≥278	≥17	152~207	* ≥14
Bars, billets, forgings; d≤28.6	GC2+(Q)	≥618	≥432	≥17	179~229	≥34
Bars, Billets, Forgings; d≤63.5	GC2+(Q)	≥618	≥432	≥17	179~229	≥20
Bars, billets, forgings; d≤22.2	GC2+(R)	≥695	≥494	≥17	201~255	≥34
Bar; d≤31.75	Cold Drawing	≥648		≥10	≤241
bar; 31.75 < d ≤ 63.5	Cold Drawing	≥602		≥10	≤229
Bar; d≥63.5	Cold Drawing	≥571		≥10	≤229

• 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

Approximate Comparison Table High-Quality Carbon Structural Steel

China	Japan	United States	International Organization for Standardization	Germany		France	European Standard		Russia	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade	GOST	BS EN/BS
40	S40C	1038 1040	C40 C40E4	C40 Ck40	1.0511	AF60C40 AF60C45 XC42HI	C40	1.0511	40	070M40 080M40 En8

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