σU
MPa
σ0.2
MPa
ϵL
ϵL(L0=5.65So√)
ReH
MPa

1.1241 (C50R)

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 10083-1	97.18–98.91	< 0.4	0.6–0.9	< 0.4	< 0.4	< 0.03	0.47–0.55	0.02–0.04	< 0.1

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	$\epsilon_L$ , %	$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$ , %	$R_{eH}$ , $MPa$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	$\epsilon_L$ , %	$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$ , %	$R_{eH}$ , $MPa$	Treatment
		< 16		normalization	650			13	355
		16–100		normalization	610			14	320
		100–250		normalization	590			14	290
		5–10		solid, cold drawn	770–1100	590	5
		10–16		solid, cold drawn	730–1080	520	6
		16–40		solid, cold drawn	690–1050	440	7
		40–63		solid, cold drawn	650–1030	390	8

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
		improved machinability	255
		annealing, soft	217
		rolling, turning	181–269

Technological Properties

Weldability
Weldability
Not applicable for welded structures

Standards

Standard	Description
Standard	Description
EN 10083-1

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
$\epsilon_L$	%	Elongation at break (longitudinal)
$\epsilon_{L (L_0 = 5.65\sqrt{S_o})}$	%	Elongation at break (longitudinal) (for L₀ = 5.65√So)
$R_{eH}$	$MPa$	Upper yield point

Designation of types of weldability

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
no limits		Welding is performed without heating and without subsequent heat treatment
Boundedly welded		Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld		For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures