1.5021 (48Si7)

Classification

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, %
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
		0.3–3		annealing, soft	720	580	13
		0.3–3		moderate hardening	1200–1700

Твёрдость по Викерсу

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

Standards

Standard	Description
EN 10132-4

Description of chemical elements

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
$$\sigma_{0.2}$$	$$MPa$$	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)