Designation
| Name |
The value |
| Designation GOST Cyrillic |
20Х17Н2 |
| Designation GOST Latin |
20X17H2 |
| Transliteration |
20H17N2 |
| By chemical elements |
20Cr17Н2 |
| Name |
The value |
| Designation GOST Cyrillic |
2Х17Н2 |
| Designation GOST Latin |
2X17H2 |
| Transliteration |
2H17N2 |
| By chemical elements |
2Cr17Н2 |
Description
20KH17N2 steel is used: for the manufacture of heavily loaded details working at the abrasion and impact in slightly aggressive environments such as high strength steel.
Note
Steel corrosion-resistant martensitic class.
20KH17N2 steel has a high hardness (HRC>45).
Standards
| Name |
Code |
Standards |
| Processing of metals by pressure. Forgings |
В03 |
GOST 25054-81 |
| Classification, nomenclature and General rules |
В30 |
GOST 5632-72 |
| Bars and shapes |
В32 |
GOST 5949-75, TU 14-11-245-88 |
| Blanks. Of the workpiece. Slabs |
В31 |
OST 3-1686-90 |
| Thermal and thermochemical treatment of metals |
В04 |
STP 26.260.484-2004 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5632-72 |
0.17-0.25 |
≤0.025 |
≤0.035 |
≤0.8 |
16-18 |
≤0.8 |
1.5-2.5 |
Rest |
≤0.3 |
≤0.2 |
≤0.2 |
≤0.3 |
≤0.2 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| Forgings. Without heat treatment in the state of delivery |
| 100-300 |
≥666 |
≥813 |
≥12 |
≥30 |
≥490 |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in oil or air from 1000-1050 °C + cold Treatment at minus 70 °C (not less than 2 hours) + Vacation at 250-320 °C, air cooling |
|
≥1200 |
≥1500 |
≥8 |
≥45 |
≥490 |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in oil or air with 975-1020 °C + Vacation at 680-700 °C, air cooling |
|
≥650 |
≥850 |
≥16 |
≥45 |
≥490 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
Technological properties
| Name |
The value |
| Features of heat treatment |
Steel products can be subjected to hardening, leave, annealing. The quenching and tempering of the products is done to achieve: a) maximum corrosion resistance; b) the specified level of mechanical properties. Steel products 20KH17N2 is subjected to heat treatment regime: heating up to 975-1020 °C exposure time 1-2 h, cooling in oil or air, a holiday at 680-700 °C for 30 min + 1 min per 1 mm of maximum wall thickness. |
