08H17N5M3 (EI925, X17H5M3)
for products operating at atmospheric conditions, acetic acid and sulfuric acid environments; austenitic steel — martensitic class
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Corrosion-resistant alloys and steels |
Corrosion-resistant ordinary steel |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Ni, % |
P, % |
C, % |
S, % |
Mo, % |
|---|
| GOST 5632-72 |
71.745–76.44 |
< 0.8 |
< 0.8 |
16–17.5 |
4.5–5.5 |
< 0.035 |
0.06–0.1 |
< 0.02 |
3–3.5 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
$$\psi$$, % |
$$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ |
Treatment |
|---|
| Forgings |
GOST 25054-81 |
|
|
|
1176 |
833 |
10–15 |
35–40 |
390–690 |
|
| Sheet |
GOST 4986-79 |
|
|
|
1130 |
|
8–16 |
|
|
Normalization |
| Sheet |
GOST 5582-75 |
|
|
|
1180 |
610 |
20 |
|
|
Hardening of 1030-1080 ° C, air |
| The sheet is thin and hardened. |
GOST 4986-79 |
|
|
|
1230 |
|
2–4 |
|
|
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Forgings |
GOST 25054-81 |
|
341–415 |
Technological Properties
Analogues
| Germany |
USA |
|---|
| X4CrNiMo16-5 |
AM350 |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ni |
% |
Nickel |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Mo |
% |
Molybdenum |
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 |
| $$KCU\cdot 10^{3}$$ |
$$\frac{J}{m^2}$$ |
Impact toughness |
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 |
|
|