12H17 (EZh17, X17)

Equipment for food and light industry plants, heat exchangers, pipes. Parts with higher corrosion requirements with good deep-drawing and polishing properties like cutlery, washers, tappets, wheel covers, etc.

fasteners, rollers, bushings, and other devices and parts of vessels working in dilute solutions of nitric acid, acetic acid, citric acid, a salt solution having oxidative properties; ferritic steel grade

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Corrosion-resistant alloys and steels	Corrosion-resistant heat-resistant steel

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	P, %	C, %	S, %
GOST 5632-72	80.22–84	< 0.8	< 0.8	16–18	< 0.035	< 0.12	< 0.025

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	$c\cdot 10^{-3}$ , $\frac{J}{kg\cdot K}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	$c\cdot 10^{-3}$ , $\frac{J}{kg\cdot K}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
20	232			7720		0.56
100	227	10.4	24		0.462	0.61
200	219	10.5	24			0.68
300	211	10.8	25			0.77
400	201	11.2	26			0.85
500	192	11.4	26			0.95
600	182	11.6				1.03
700	165	11.9				1.11
800	148	12.1				1.15
900						1.16

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Pipes are coldly deformed.	GOST 9941-81				441		17
Pipes are hot deformed.	GOST 9940-81				441		17
Rod	GOST 5949-75		Longitudinal		390	245	20	50	Annealing 760-780 ° C, air
The plates	GOST 7350-77				440		18		Annealing
Sheet	GOST 5582-75				490		20		Annealing 740-780 ° C

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Rod	GOST 5949-75	annealing	126–197

Technological Properties

Weldability	Propensity to temper brittleness
Weldability	Propensity to temper brittleness
Difficult to weld	inclined

Analogues

USA	Germany
USA	Germany
S43000	1.4016 (X6Cr17)

Standards

Standard	Description
Standard	Description
GOST 5632-72
GOST 5949-75

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$E\cdot 10^{9}$	$MPa$	Elastic modulus
$\alpha\cdot 10^{6}$	$K^{-1}$	Coefficient of thermal (linear) expansion (range 20°C–T)
$\varkappa$	$\frac{W}{m\cdot K}$	Coefficient of thermal conductivity (the heat capacity of the material)
$\rho$	$\frac{kg}{m^3}$	The density of the material
$c\cdot 10^{-3}$	$\frac{J}{kg\cdot K}$	The specific heat of the material (range 20°C–T)
$R\cdot 10^{-6}$	$\Omega\cdot m$	Electrical resistivity

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

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