1.7228 (50CrMo4)

Classification

Country	Section	Category
Country	Section	Category
Germany	Structural, Pressure Vessel and Engineering Steels	Cr-Mo with Mo < 0.35%, Cr-Mo-B

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	P, %	C, %	S, %	Mo, %
	96.7–97.99	< 0.4	0.5–0.8	0.9–1.2	< 0.025	0.46–0.54	< 0.035	0.15–0.3

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$ , %	$\epsilon_T$ , %	$R_{eH}$ , $MPa$	$\psi$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$ , %	$\epsilon_T$ , %	$R_{eH}$ , $MPa$	$\psi$ , %	Treatment
		< 16		moderate hardening	1100–1300	9	9–11	900	40
		16–40		moderate hardening	1000–1200	10		780	45
		40–100		moderate hardening	900–1100	12		700	50
		100–160		moderate hardening	850–1000	13		650	50
		160–250		moderate hardening	750–950	13		550	50
		250–330		moderate hardening	750
		330–500		moderate hardening	700			490
		< 160		moderate hardening				550
		160–330		moderate hardening				540

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
		annealing, soft	248

Analogues

CIS, Russia, Ukraine
CIS, Russia, Ukraine
50X

Standards

Standard	Description
Standard	Description
EN 10083-1
EN 10250-3

Description of chemical elements

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

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$	%	Elongation at break (longitudinal) (for L₀ = 5.65√So)
$\epsilon_T$	%	Elongation at break (transverse)
$R_{eH}$	$MPa$	Upper yield point
$\psi$	%	Reduction in cross section on fracture