16G2AF

Manganese-vanadium alloyed steel with nitrogen; According to GOST 27772−88 corresponds to steel for building structures C440. Substitutes 15Г2АФ, 14Г2АФ .

Steel structures, welded farm for engineering products.

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	96.18–98.165	0.3–0.6	1.3–1.7	< 0.4	< 0.3	< 0.3	0.08–0.14	< 0.08	< 0.035	0.14–0.2	< 0.04	0.015–0.025

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\epsilon_L$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\epsilon_L$ , %	Treatment
Sheet	GOST 19282-73	5–9			600	450	20
Sheet	GOST 19281-2014	< 50			510	380	19

Technological Properties

Weldability
Weldability
no limits

Critical point temperatures

Ac₁, K	Ac₃(Ac_m), K	Mn, K
Ac₁, K	Ac₃(Ac_m), K	Mn, K
723	907	400

Analogues

USA	Germany	Japan	France	United Kingdom	Canada	European Union	Italy	Spain	China	Sweden	Bulgaria	Hungary	Poland	Romania	Czech Republic	Switzerland
USA	Germany	Japan	France	United Kingdom	Canada	European Union	Italy	Spain	China	Sweden	Bulgaria	Hungary	Poland	Romania	Czech Republic	Switzerland
K12437	1.8905 (P460N)	SM490A	E420RIFP	50E	400WT	1.8902	FeE420KG	AE420KG	Q420C	2143	09G2BFBFF	58C	18G2AV	K510	13220	StE43

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
$\sigma_{Y}$	$MPa$	Yield strength
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\epsilon_L$	%	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
Mn	K