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

Chemical composition

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

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
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
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
Rod GOST 5949-75 annealing 126–197

Technological Properties

Weldability Propensity to temper brittleness
Difficult to weld inclined

Analogues

USA Germany
S43000 1.4016 (X6Cr17)

Standards

Standard Description
GOST 5632-72
GOST 5949-75

Description of chemical elements

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
$$E\cdot 10^{9}$$ $$MPa$$ 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
$$\sigma _{U}$$ $$MPa$$ 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
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