CrN60M (circle, wire, tube, sheet, strip) (ep367)
Relevance
This heat-resistant alloy on the iron (iron-nickel) base is used in the manufacture of flat springs, rotors, disks, fasteners, produced by cold upsetting, as well asAs well as turbine blades and various turbine parts which are operated at temperatures up to + 650°C according to GOST 5632-72 "Heat-resistant, corrosion-resistant, heat-resistant and high-alloy steels. Grades", as well as technical specifications 14-11-245-88 "T. У. Shaped steel sections of high precision. The material in modern engines for turbine blades has to have high fracture resistance under thermal, low-cycle fatigue, which is the main type of fracture today. The risk of fracture can be exacerbated by surface reactions due to softening of grain boundaries and gas corrosion. The main requirements to the material for the turbine blades production are caused by the latest developments of the engine designs, continuous increase of plasticity, low cycle resistance, thermal fatigue, heat resistance as well as the resistance to the influence of gas media.
Percentage composition of GOST 5632-72
| Ni |
Cr |
Mn |
W |
Fe |
Si |
C |
P |
S |
Ti |
Al |
Si |
|---|
| 58.5 - 63 |
23.5 - 26.5 |
≤ 0.5 |
13 - 16 |
≤ 4 |
≤ 0,8 |
≤ 0.1 |
≤ 0.013 |
≤ 0.013 |
0.3 - 0.7 |
≤ 0.5 |
to 0.8 |
Physical characteristics
| J/(kg-degree) |
MPa |
W/(m-degree) |
С° |
1/degree |
|---|
| C |
a |
l |
t° |
a 10 6 |
|
|
|
900 |
16.9 |
|
150 |
26 |
800 |
17.7 |
| 1170 |
158 |
24 |
700 |
16.6 |
| 1160 |
166 |
22 |
600 |
16.6 |
| 1150 |
173 |
21 |
500 |
16.1 |
| 1120 |
179 |
19 |
400 |
15.9 |
| 1100 |
186 |
17 |
300 |
15.5 |
| 1050 |
190 |
16 |
200 |
15.1 |
| 1020 |
195 |
13 |
100 |
14.8 |
|
202 |
|
20 |
|
|
198 |
|
0 |
|
Magnetic characteristics:
| Coercive force (not higher), in [ A/m] |
Hc |
|---|
| Magnetic permeability (not higher), in [ Mg/m] |
U max |
| Losses per unit (not above) frequency 50 Hz, 1.0 Tesla, in [ W/kg ] |
P1.0/50 |
| Magnetic Tl induction magnetic field strength not less than 100, in [ A/m] |
B100 |
Mechanical properties (temperature 20°C)
| Product |
cross section, mm |
St|S0.2, MPa |
d |
d10 |
y ,% |
HRB |
sB, MPa |
d5,% |
d4 |
tisp.,°C |
d5,% d4 TiP,°C |
HV |
HSh |
HB |
KCU, kJ/m2 |
HRC |
|---|
| CRN35VT-VD |
≤200 |
≥490 |
|
|
≥40 |
|
≥830 |
≥18 |
|
|
|
|
|
207-269 |
≥588 |
|
| CRN35VT |
≤650 |
≥392 |
|
|
≥25 |
|
≥735 |
≥15 |
|
|
|
|
|
207-269 |
≥686 |
|
Mechanical Specifications:
| Description |
Designation |
|---|
| Ultimate short-term tensile strength, in [MPa] |
In |
| Yield strength (limit of proportionality) for permanent deformation, in [MPa] |
sT |
| Tensile elongation, in [ % ] |
d5 |
| The relative narrowing, in [ % ] |
y |
| Impact toughness, in [ kJ/m2 ] |
KCU |
| Brinell hardness, [MPa] |
HB |
Technical specifications, GOST
| Range |
GOST, TU |
| Round, high quality steel surface, with special finish |
14 955-77 |
| Round hot-rolled steel bar |
2590-2006 |
| Square hot rolled section steel bar |
2591-2006 |
| High precision shaped steel sections |
14-11-245-88 |
| Round, square forged steel |
1133-71 |
| Forged, hot-rolled tool steel strips |
4405-75 |
| Round steel calibrated |
7417-75 |
| Square steel calibrated. |
8559-75 |
| Hot rolled steel bars |
103-2006 |
| Calibrated, section steel is corrosion-resistant, heat-resistant, heat-resistant |
5949-75 |
| Calibrated hexagonal rolled steel |
8560-78 |
| Forged steel square, round |
1133-71 |
| Heat-resistant, heat-resistant, corrosion-resistant, high-alloy steels |
5632-72 |
| Hot-rolled section steel hexagonal bar |
2879-2006 |
Vendor
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