30HGFRL

gears, gear units.

Classification

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

Chemical composition

Standard	Fe, %	Si, %	B, %	Mn, %	Cr, %	Cu, %	Ni, %	V, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	B, %	Mn, %	Cr, %	Cu, %	Ni, %	V, %	P, %	C, %	S, %
TU 24.00.001 - 0	96.106–98.17	0.2–0.6	< 0.004	0.8–1.25	0.5–0.9	< 0.3	< 0.3	0.05–0.1	< 0.04	0.28–0.36	< 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		< 100			700	500	12	25	400	Tempering 900-920 ° C, 650-670 ° C and Holidays

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy		Hardening, average vacation	196–255

Casting and technological parameters

linear shrinkage, %
linear shrinkage, %
1.5–2

Technological Properties

Propensity to temper brittleness
Propensity to temper brittleness
inclined

Critical point temperatures

Ac₁, K	Ac₃(Ac_m), K	Ar₃(Arc_m), K	Ar₁, K	Mn, K
Ac₁, K	Ac₃(Ac_m), K	Ar₃(Arc_m), K	Ar₁, K	Mn, K
750–760	845–855	720–855	425–675	320–370

Standards

Standard	Description
Standard	Description
TU 24.00.001 - 0

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
B	%	Bor
Mn	%	Manganese
Cr	%	Chrome
Cu	%	Copper
Ni	%	Nickel
V	%	Vanadium
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

Description of the casting and technological parameters

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
linear shrinkage	%	The difference between model dimensions and the model casting

Description of temperatures of critical points

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
Ac₁	K
Ac₃(Ac_m)	K
Ar₃(Arc_m)	K
Ar₁	K
Mn	K