18G2AFps (18G2AF)

Manganese-vanadium steel with nitrogen. Weldability without restrictions. Substitutes 16G2AF, 10HSND, 15HSND .

Rolled metal bearing elements for welded structures operating under variable loads in the range of temperatures up to -60 ° C.

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Structural steel	Low alloy structural steel for welded structures

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	V, %	As, %	P, %	C, %	S, %	N, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	V, %	As, %	P, %	C, %	S, %	N, %
GOST 19281-89	96.675–98.465	< 0.17	1.3–1.7	< 0.3	< 0.3	< 0.3	0.08–0.15	< 0.08	< 0.035	0.14–0.22	< 0.04	0.015–0.03

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	Treatment
Sheet	GOST 19282-73				590	440	19

Technological Properties

Weldability
Weldability
no limits

Critical point temperatures

Ac₁, K	Ac₃(Ac_m), K	Ar₃(Arc_m), K	Ar₁, K
Ac₁, K	Ac₃(Ac_m), K	Ar₃(Arc_m), K	Ar₁, K
720	880	780	620

Analogues

USA	Germany	Japan	France	United Kingdom	European Union	Italy	Spain	China	Sweden	Hungary	Poland	Switzerland
USA	Germany	Japan	France	United Kingdom	European Union	Italy	Spain	China	Sweden	Hungary	Poland	Switzerland
K12202	1.8905 (P460N)	SM520B	E460RIFP	4360-55F	1.8901	FeE460KG	AE460KG	15MnVNR	2143	E460D	18G2AV	StE47

Standards

Standard	Description
Standard	Description
GOST 19281-89

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Cu	%	Copper
Ni	%	Nickel
V	%	Vanadium
As	%	Arsenic
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
N	%	Nitrogen

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)

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

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