En39B - BS 970-1955

Grade	En39B
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

En39B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo	V ^*
Minimum Value	0.12	0.1	-	-	-	1	3.8	0.15	-
Maximum Value	0.18	0.35	0.5	0.05	0.05	1.4	4.5	0.35	0.05

En39B Mechanical Properties

diameter or width across flats d mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Elongation or Extension Rate δ %	Hardness HBW	Impact Energy Absorption KV2 J
Bars, billets, forgings, mechanical bars, bright bars; d≤28.6	Heat Treatment	≥1312	≥12		≥34
Bars, billets, forgings, mechanical bars, bright bars; d≤28.6	Softening Treatment			≤277

• 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 Structural Alloy Steel

China	United Kingdom
GB	BS EN/BS
15CrNi4Mo	835M15 EN39B

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