1.1249 (Cf70)

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, %	P, %	C, %	S, %	N, %
Standard	Fe, %	Si, %	Mn, %	P, %	C, %	S, %	N, %
	98.483–98.97	0.15–0.35	0.2–0.35	< 0.025	0.68–0.75	< 0.035	< 0.007

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KU$ , $J$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KU$ , $J$	Treatment
		< 16			780–930	> 560	> 11	> 25	> 21	After processing
		17–40			740–880	> 480	> 13	> 30	> 21

Analogues

CIS, Russia, Ukraine
CIS, Russia, Ukraine
70

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
N	%	Nitrogen

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma_{Y}$	$MPa$	Yield strength
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture
$KU$	$J$	Impact energy