1.5511 (35B2)

Classification

Country	Section	Category
Country	Section	Category
Germany	Structural, Pressure Vessel and Engineering Steels	B, Mn-B Mn < 1.65%

Chemical composition

Standard	Fe, %	Si, %	B, %	Mn, %	Al, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	B, %	Mn, %	Al, %	P, %	C, %	S, %
EN 10269	98.315–99.1792	< 0.4	0.0008–0.005	0.5–0.8	< 0.02	< 0.035	0.32–0.39	< 0.035

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KV_{L}$ , $J$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KV_{L}$ , $J$	Treatment
				annealing, carbide spheroidization	570			62
				moderate hardening	500–650	300	22	45	39–55

Standards

Standard	Description
Standard	Description
EN 10269

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
B	%	Bor
Mn	%	Manganese
Al	%	Aluminium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma_{0.2}$	$MPa$	Tensile stress required to produce a total elongation of 0.2%
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture
$KV_{L}$	$J$	Impact energy (longitudinal)