20GL

wheels, sprockets and other jagged crowns. parts, which are requirements for strength and toughness, operating under the influence of static and dynamic loads

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, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	P, %	C, %	S, %
GOST 977-88	97.67–98.45	0.2–0.4	1.2–1.6	< 0.04	0.15–0.25	< 0.04

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Castings	GOST 977-88				540	275	18	25	491	Normalization of 880-900 ° C, 600-650 ° C and Holidays
Castings	GOST 977-88				530	334	14	25	383	Tempering 870-890 ° C, 620-650 ° C and Holidays
Castings	GOST 21357-87				500	300	20	35		Normalization
Castings	GOST 21357-87				550	400	15	30		Hardening and tempering

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy			1430–1870

Heat Treatment Modes

Treatment
Treatment
Normalization 880 - 900 ° C, Release 600 - 650 ° C
Tempering 870 - 890 ° C, Vacation 620 - 650 ° C

Analogues

USA	Germany
USA	Germany
J02505	1.1131 (G17Mn5)

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
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
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	Impact toughness