1.1177 (25Mn4)

Classification

Country	Section	Category
Country	Section	Category
Germany	Non-alloy Special Steels	Structural Pressure Vessel and Engineering Steels with C < 0,5%

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %	Mo, %
EN 10132-3	97.2–98.82	< 0.4	0.95–1.15	< 0.4	< 0.4	< 0.035	0.23–0.28	< 0.035	< 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	590	460	20

Твёрдость по Викерсу

Rolling	Standard	Classifiers	Value, HV
Rolling	Standard	Classifiers	Value, HV
		annealing, soft	180

Standards

Standard	Description
Standard	Description
EN 10132-3

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)