Alloy KHN28VMAB (ЭП126; ВЖ100)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН28ВМАБ |
| Designation GOST Latin |
XH28BMAB |
| Transliteration |
HN28VMAB |
| The chemical elements |
CrNi28ВCuAlBe |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП126 |
| Designation GOST Latin |
EP126 |
| Transliteration |
EhP126 |
| The chemical elements |
- |
| Name |
The value |
| Designation GOST Cyrillic |
ВЖ100 |
| Designation GOST Latin |
BZh100 |
| Transliteration |
VG100 |
| The chemical elements |
ВFe100 |
Description
Alloy KHN28VMAB used: for the manufacture of sheet metal components for turbines and other parts in power engineering; welding wire used for welding parts and welding of steel structures in energy engineering; welding electrodes; rings welded and wrought for various purposes for the aviation industry.
Note
Heat-resistant alloy based on Nickel-iron.
The recommended maximum operating temperature for a long time + 800−1000 °C. the Temperature of intensive scaling in air +1100 °C.
Standards
| Name |
Code |
Standards |
| Sheets and stripes |
В33 |
GOST 24982-81, TU 14-1-1747-76 |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-72 |
| Sectional and shaped rolling |
В32 |
OST 1 92049-76, TU 14-1-192-72, TU 14-1-21-71, TU 14-11-245-88 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90, OST 1 90253-77, OST 1 90279-79, OST 1 90346-83, TU 14-1-1214-75 |
| Thermal and thermochemical treatment of metals |
В04 |
ST ЦКБА 016-2005 |
| Tapes |
В34 |
TU 14-1-1008-74 |
| Metal forming. Forgings |
В03 |
TU 14-1-1530-75, TU 14-1-2902-80 |
| Welding and cutting of metals. Soldering, riveting |
В05 |
TU 14-1-997-74, TU 14-1-997-2012 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
N |
V |
B |
Ti |
Mo |
Nb |
W |
| TU 14-1-997-74 |
≤0.1 |
≤0.02 |
≤0.02 |
≤1.5 |
19-22 |
≤0.6 |
25-30 |
The rest |
- |
0.15-0.3 |
- |
≤0.005 |
- |
2.8-3.5 |
0.7-1.3 |
4.8-6 |
| GOST 5632-72 |
≤0.1 |
≤0.02 |
≤0.02 |
≤1.5 |
19-22 |
≤0.6 |
25-30 |
The rest |
≤0.3 |
0.15-0.3 |
- |
≤0.005 |
≤0.2 |
2.8-3.5 |
0.7-1.3 |
4.8-6 |
| TU 14-1-192-72 |
≤0.1 |
≤0.02 |
≤0.02 |
≤1.5 |
19-22 |
≤0.6 |
25-30 |
The rest |
≤0.3 |
≤0.3 |
- |
≤0.005 |
≤0.2 |
2.8-3.5 |
0.7-1.3 |
4.8-6 |
| TU 14-1-2902-80 |
≤0.1 |
≤0.02 |
≤0.02 |
≤1.5 |
19-22 |
≤0.6 |
25-30 |
The rest |
≤0.3 |
≤0.3 |
- |
≤0.005 |
≤0.2 |
2.8-3.5 |
0.7-1.3 |
4.8-6 |
| TU 14-1-1747-76 |
≤0.1 |
≤0.02 |
≤0.02 |
≤1.5 |
19-22 |
≤0.6 |
25-30 |
The rest |
≤0.2 |
0.15-0.3 |
≤0.2 |
≤0.005 |
- |
2.8-3.5 |
0.7-1.3 |
4.8-6 |
Fe is the basis.
According to GOST 5632-72 and TU 14-1-1747-76 the chemical composition is given for the alloy grade KhN28VMAB. For grade ХН28ВМАБ-ВД (ЭП126-ВД) the content of N% ≤ 0.30%.
According to TU 14-1-2902-80 and TU 14-1-192-72 the chemical composition is given for ХН28ВМАБ-ВД (ЭП126-ВД).
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
d4 |
y, % |
kJ/m2, кДж/м2 |
| Blank pieces of pipe fittings and welded assemblies at ST CKBA 016-2005. Hardening in air, 1100-1120 °C (extract of 1.5-2.0 min/mm the largest section) |
|
≥343 |
≥735 |
≥30 |
- |
≥40 |
≥784 |
| Hardening in air, 1050-1130 °C |
|
- |
≥640 |
≥32 |
- |
≥40 |
≥780 |
|
- |
≥196 |
≥50 |
- |
≥40 |
- |
|
- |
≥685 |
≥32 |
- |
≥40 |
≥833 |
|
- |
≥196 |
≥52 |
- |
≥50 |
- |
| Ring welded of alloy grade KHN28VMAB at OST 1 90253-77. Annealing in air 1110-1150 °C |
|
- |
≥736 |
≥30 |
- |
- |
- |
|
- |
≥657 |
≥12 |
- |
- |
- |
| Ring forged from alloy grade KHN28VMAB-VD at OST 1 92049-76. Hardening in air, 1050-1130 °C |
| 25 |
- |
≥685 |
≥27 |
- |
≥34 |
≥657 |
| Tape supplied on the other 14-1-1008-74 |
| - |
- |
≥930 |
- |
≥25 |
- |
- |
| Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 11.0 mm) in the delivery state according to GOST 24982-81. Quenching in water, under a water shower or air 1080-1140 °C |
| ≤3.9 |
- |
≤930 |
≥35 |
- |
- |
- |
| ≤3.9 |
- |
≥165 |
≥30 |
- |
- |
- |
| 4-11 |
- |
≤930 |
≥25 |
- |
- |
- |
| 4-11 |
- |
≥195 |
≥40 |
- |
- |
- |
| Forgings. Annealing in air 1110-1150 °C |
|
- |
≥740 |
≥30 |
- |
≥40 |
≥780 |
|
- |
≥196 |
≥50 |
- |
≥35 |
- |
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 |
| d4 |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
Technological properties
| Name |
The value |
| Features of heat treatment |
Welded assemblies of steel grade KHN28VMAB needs to be heat treated to relieve welding stresses at temperatures from 950 °C to 1000 °C. After welding, the nodes with small section welded joints (3-5 mm) heat treatment not subjected to. Aging at the temperature quenching rate of not less than 2.5 min per 1 mm of maximum wall thickness. Fit welded Assembly to a heat treatment to produce in a furnace, heated to a temperature of not higher than 500 °C; welded Assembly with cladding of Stellite subjected to heat treatment immediately after welding, it is allowed to load into the oven, heated to a temperature not exceeding 600 °C. Heat treatment of welded assemblies, where allowed reduced compared to the base metal strength of weld and stress relief is not required, it is allowed to produce, in addition to Assembly operating at cryogenic temperatures. |
