Alloy 03KHN28MDT (ЭП516)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
03ХН28МДТ |
| Designation GOST Latin |
03XH28MDT |
| Transliteration |
03HN28MDT |
| The chemical elements |
03CrNi28CuДTe |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП516 |
| Designation GOST Latin |
EP516 |
| Transliteration |
EhP516 |
| The chemical elements |
- |
Description
Alloy 03KHN28MDT used: for the manufacture of welded structures operating in the production of sulfuric acid, nitrophoska, wet-process phosphoric acid and other environments of increased aggressiveness at temperatures up to +80 °C; in sulphuric acid of different concentrations and in acidic and sulphate environments, with the exception of 55% acetic and phosphoric acids; welding electrodes; all equipment connections, joints of pipelines in the apparatus, connections, pipes, fittings etc. with a vehicle body and repair welds equipment used in radioactive environments.
Note
Alloy for corrosion-resistant iron-based.
03KHN28MDT alloy has a high resistance to intergranular corrosion and knife compared to the alloy 06HN28MDT.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-72 |
| Sectional and shaped rolling |
В32 |
GOST 5949-75, GOST 14955-77, TU 14-11-245-88 |
| Sheets and stripes |
В33 |
GOST 7350-77 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90 |
| Welding and cutting of metals. Soldering, riveting |
В05 |
OST 95 10441-2002 |
| Thermal and thermochemical treatment of metals |
В04 |
STP 26.260.484-2004 |
| Pipes steel and connecting parts to them |
В62 |
TU 14-158-135-2003, TU 14-3-694-78, TU 14-3-696-78, TU 14-3-751-78, TU 14-1-756-73, TU 14-3-1201-83 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5632-72 |
≤0.03 |
≤0.02 |
≤0.035 |
≤0.8 |
22-25 |
≤0.8 |
26-29 |
The rest |
2.5-3.5 |
≤0.2 |
0.5-0.9 |
2.5-3 |
≤0.2 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
| Hot rolled sheet (4,0-25,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water from 1040-1080 °C |
| - |
≥215 |
≥540 |
≥35 |
- |
| Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1050-1080 °C |
|
≥220 |
≥520 |
≥25 |
≥40 |
| Cold-rolled tubes after austenization on delivery |
|
- |
≥490 |
≥30 |
- |
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 |
| y |
The relative narrowing |
Technological properties
| Name |
The value |
| Weldability |
automatic arc welding with non-consumable electrode in a continuous mode, manual argon arc welding with non-consumable electrode (filler or without filler material), combined welding methods. Allowed the use of manual arc welding with coated electrodes. |
| Features of heat treatment |
Products made of alloy for maximum corrosion resistance should be subjected to the annealing regime: heating to 1050-1080 °C, exposure with wall thickness up to 15 mm - 30 min, more than 15 mm - 30 min + 1 min per 1 mm max thickness cooling in water or air. The annealing products of alloy has not been subjected to welding, stress relieving should be carried out at 950 ±10 °C for 2 h, cooling in air. Annealing of weldments from the alloy to relieve stresses should be carried out at 1050±10 °C, hold for 2 h, cooling in air. |
