1.5021 (48Si7)

Classification

Country	Section	Category
Country	Section	Category
Germany	Structural, Pressure Vessel and Engineering Steels	Mn-Si-Cu

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
EN 10132-4	95.73–97.45	1.6–2	0.5–0.8	< 0.4	< 0.4	< 0.025	0.45–0.52	< 0.025	< 0.1

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	$\epsilon_{L (L_0 = 80 mm)}$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	$\epsilon_{L (L_0 = 80 mm)}$ , %	Treatment
		0.3–3		annealing, soft	720	580	13
		0.3–3		moderate hardening	1200–1700

Твёрдость по Викерсу

Rolling	Standard	Classifiers	Value, HV
Rolling	Standard	Classifiers	Value, HV
		annealing, soft	225
		moderate hardening	370–520

Standards

Standard	Description
Standard	Description
EN 10132-4

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Ni	%	Nickel
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Mo	%	Molybdenum

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
$\epsilon_{L (L_0 = 80 mm)}$	%	Elongation at break (longitudinal) (for L₀ = 80 mm)