30HL

for the manufacture of castings buildings absorbing devices wagons and other parts of various industrial applications; hinged cast chains normal strength for rotary kilns used in the cold zone at a temperature of the gas stream 200−500 ° C and heat exchangers rotating cement kilns

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Steels and alloys for castings	Ordinary steel for castings

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	P, %	C, %	S, %
GOST 977-88	97.37–98.55	0.2–0.5	0.5–0.9	0.5–0.8	< 0.04	0.25–0.35	< 0.04

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	d5, %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	d5, %	Treatment
Castings	GOST 977-88				530	285	30	265	15
Castings	GOST 977-88				677	432	30	402	15	Tempering 890 - 910 ° C, Vacation 620 - 660 ° C
Castings	GOST 977-88				660	550	20		10	Hardening and tempering

Heat Treatment Modes

Treatment
Treatment
Normalization 900 - 920 ° C, Vacation 550 - 650 ° C
Tempering 890 - 910 ° C, Vacation 620 - 660 ° C

Standards

Standard	Description
Standard	Description
GOST 977-88

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

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
d5	%	Elongation at break
$\sigma_{Y}$	$MPa$	Yield strength
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\psi$	%	Reduction in cross section on fracture
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	Impact toughness