14H2GMRL

responsible for the welded-cast structures of large sections of career and draglines.

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, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	B, %	Mn, %	Cr, %	Cu, %	Ni, %	P, %	C, %	S, %	Mo, %
GOST 21357-87	95.316–96.95	0.2–0.42	< 0.004	0.9–1.2	1.4–1.7	< 0.3	< 0.3	< 0.02	0.1–0.17	< 0.02	0.45–0.55

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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 21357-87	< 100			690	590	14	25	490

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy		annealing	179–196

Casting and technological parameters

linear shrinkage, %
linear shrinkage, %
2.4–2.5

Technological Properties

Weldability	Propensity to temper brittleness
Weldability	Propensity to temper brittleness
Difficult to weld	loathsome

Heat Treatment Modes

Treatment
Treatment
Water hardening 920 - 930 ° C, Release 630 - 650 ° C

Standards

Standard	Description
Standard	Description
GOST 21357-87

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
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Mo	%	Molybdenum

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

Designation of types of weldability

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
no limits		Welding is performed without heating and without subsequent heat treatment
Boundedly welded		Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld		For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures