The stainless steel alloyed 30X15H35V3B3T

Multicomponent complex-alloyed stainless steel. Used for the manufacture and welding of metal structures operating at high temperatures and in aggressive environments

Classification

Country	Section	Category
CIS, Russia, Ukraine	Materials for welding and soldering	Steel welding wire

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ti, %	Ni, %	P, %	C, %	S, %	Nb, %	W, %
GOST 2246-70	38.33–45.73	< 0.6	0.5–1	14–16	0.2–0.7	34–36	< 0.025	0.27–0.33	< 0.015	2.8–3.5	2.5–3.5

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Physical characteristics

Temperature, °C	$$E\cdot 10^{9}$$, $$MPa$$	$$\varkappa$$, $$\frac{W}{m\cdot K}$$	$$\rho$$, $$\frac{kg}{m^3}$$	$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20	200	14.5	7900	1100

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$$\sigma _{U}$$, $$MPa$$	$$\sigma_{Y}$$, $$MPa$$	d5, %	Treatment
Round	GOST 5949-18	60	Transverse		590–610	290–300	25–30

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Rolling	Standard	Classifiers	Value, HRC
Round	GOST 5949-18		240–260

Technological Properties

Weldability	Flake Susceptibility	Propensity to temper brittleness
Difficult to weld	insensitive	not inclined

Limit operating modes

Standard	Температура, °C
GOST 5949-18	< 900

Heat Treatment Modes

Treatment
Quenching from 1140-1180 degrees C with cooling in water

Long-term strength

Standard	Treatment	Постоянно приложенное напряжение, МПа
GOST 5949-18		< 450

Standards

Standard	Description
GOST 2246-70
GOST 4543-71
GOST 5949-18

Description of chemical elements

Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Ti	%	Titan
Ni	%	Nickel
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Nb	%	Niobium
W	%	Tungsten

Description of physical characteristics

Parameter	Units of measurement	Description
$$E\cdot 10^{9}$$	$$MPa$$	Elastic modulus
$$\varkappa$$	$$\frac{W}{m\cdot K}$$	Coefficient of thermal conductivity (the heat capacity of the material)
$$\rho$$	$$\frac{kg}{m^3}$$	The density of the material
$$R\cdot 10^{-6}$$	$$\Omega\cdot m$$	Electrical resistivity

Description of mechanical properties

Parameter	Units of measurement	Description
d5	%	Elongation at break
$$\sigma_{Y}$$	$$MPa$$	Yield strength
$$\sigma _{U}$$	$$MPa$$	Ultimate tensile strength

Designation of types of weldability

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