15H18SYU (EI484, H18SYU)

tube pyrolysis plants, equipment, heat-resistant steel

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Heat resistant steels and alloys	Heat resistant high alloy steel

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Al, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Al, %	P, %	C, %	S, %
GOST 5632-72	76.29–81.3	1–1.5	< 0.8	17–20	0.7–1.2	< 0.035	< 0.15	< 0.025

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Rod	GOST 5949-75				490	295	20	50	Annealing

Analogues

Germany	USA
Germany	USA
1.4742	430

Standards

Standard	Description
Standard	Description
GOST 5632-72

Description of chemical elements

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

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\sigma_{P}$	$MPa$	Proportionality limit
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture