Alloy KHN65MVU (ЭП760)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН65МВУ |
| Designation GOST Latin |
XH65MBU |
| Transliteration |
HN65MVU |
| The chemical elements |
CrNi65CuВУ |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП760 |
| Designation GOST Latin |
EP760 |
| Transliteration |
EhP760 |
| The chemical elements |
- |
Description
Alloy KHN65MVU used: for the manufacture of welded structures chemical equipment operating at high temperatures in aggressive environments the redox nature (sulfuric acid, acetic acid, wet chlorine, chlorides, etc.); as a cladding layer in the manufacture of hot-rolled dual-layer corrosion-resistant sheets; warm seamless pipe for chemical equipment.
Note
Corrosion resistant alloy on a Nickel basis.
The alloy is resistant to intergranular corrosion in aggressive environments.
Standards
| Name |
Code |
Standards |
| Sheets and stripes |
В33 |
GOST 10885-85, GOST 24982-81, TU 14-1-3587-83 |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-72 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90, TU 14-1-1214-75, TU 14-1-3768-84 |
| Test methods. Packaging. Marking |
В09 |
RD 24.200.15-90 |
| Tapes |
В34 |
TU 14-1-4253-87 |
| Sectional and shaped rolling |
В32 |
TU 14-11-245-88, TU 14-134-380-2000 |
| Pipes steel and connecting parts to them |
В62 |
TU 14-3-1227-83, TU 1380-001-08620133-05, TU 14-158-135-2003, TU 14-3-1320-85 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Ti |
Mo |
W |
| GOST 5632-72 |
≤0.02 |
≤0.012 |
≤0.015 |
≤1 |
14.5-16.5 |
≤0.1 |
The rest |
≤0.5 |
≤0.3 |
≤0.2 |
15-17 |
3-4.5 |
| TU 14-3-1320-85 |
≤0.02 |
≤0.012 |
≤0.015 |
≤1 |
14.5-16.5 |
≤0.1 |
The rest |
≤0.5 |
- |
≤0.2 |
15-17 |
3-4.5 |
Ni is the basis.
According to TU 14-3-1320-85, a tolerance of carbon content of +0.010% is allowed, for silicon +0.03%. The calculated content of modifiers and deoxidizers - magnesium, cerium, aluminum - is established by technological instructions and their residual content in the metal is not determined by chemical analysis.
According to TU 14-1-3587-83, a deviation in silicon of +0.010% is allowed. When melting alloy ХН65МВУ (ЭП760) electrolytic refined chrome is used. When ensuring the requirements of specifications, the use of chromium, obtained by other methods, is allowed.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
| Sheet hot rolled state of delivery on the other 14-1-3587-83 |
|
≥440 |
≥850 |
≥40 |
| Steel hot-rolled sheet (4.0 to 11.0 mm) in the delivery state according to GOST 24982-81. Quenching in water, under a water shower or air 1050-1090 °C |
| 4-11 |
≥440 |
≥830 |
≥35 |
| Warm seamless tubes in the delivery condition on the other 14-3-1320-85 after heat treatment and etching |
| - |
≥372 |
≥784 |
≥40 |
| Cold-rolled tubes after austenization on delivery |
|
- |
≥833 |
≥40 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
9300 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Features of production |
Pipe on the other 14-3-1320-85 must withstand the test of flattening to the distance between clusively planes (N) in millimeters, is equal to N=1,08 S/0,08+S/D, where S is wall thickness of pipe, mm; D - nominal outside diameter of pipe, mm. When unsatisfactory test flattening of the pipe shall be tested for flattening to the distance between clusively planes (N) in millimeters, is equal to N=0.5 D + 2S. The pipes should withstand the test distribution to increase the outer diameter of the pipe by 10%. Tubes shall withstand hydraulic pressure in accordance with GOST 3845, when allowable voltage equal to 40% of the temporary tear resistance. The ability of pipe to withstand hydraulic pressure is provided by the technology without testing. The pipes undergo ultrasound in the hardware configuration on the test specimen with artificial defects applied on the inner and outer surface, to a depth of 10% of the nominal wall thickness and a length of 25 mm. |
| Corrosion resistance |
Pipe supplied under THAT 14-3-1320-85 must pass the test at IWC. |
| Propensity to intergranular corrosion |
Test the propensity of the alloy to intergranular corrosion produced on samples exposed to provocative to heating at 800 °C for 30 minutes with air cooling and subsequent quarters of the sample for 48 hours in 30% sulfuric acid (GOST 4204) supplemented with 40 g/l of iron sulfate (GOST 9485). The production of samples, preparation for testing, testing and evaluation of the propensity to intergranular corrosion according to GOST 6032. Evaluation of tendency to intercrystalline corrosion of sheets with a thickness of 10 mm or more is permitted by metallographic methods. |
