Alloy ХН40МДБ (ЭП937)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН40МДБ |
| Designation GOST Latin |
XH40MDB |
| Transliteration |
HN40MDB |
| The chemical elements |
CrNi40CuДBe |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП937 |
| Designation GOST Latin |
EP937 |
| Transliteration |
EhP937 |
| The chemical elements |
- |
Description
Alloy ХН40МДБ used: for the manufacture of billets, sheet and rolled steel used to manufacture parts and equipment of chemical and petrochemical engineering.
Standards
| Name |
Code |
Standards |
| Sheets and stripes |
В33 |
TU 14-1-2131-77 |
| Bulls. Blanks. Slabs |
В31 |
TU 14-1-5052-91 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
N |
Al |
V |
B |
Mo |
Ce |
| TU 14-1-2131-77 |
≤0.03 |
≤0.02 |
≤0.02 |
0.8-1.5 |
20-22 |
≤0.2 |
39-42 |
The rest |
1.5-2.2 |
≤0.03 |
≤0.2 |
≤0.2 |
≤0.002 |
5-6.5 |
≤0.03 |
Ni is the basis.
According to TU 14-1-2131-77 the chemical composition is given for the alloy grade KhN40MDB-VI (EP937-VI). The content of niobium in the alloy should be in the range of 15С ÷ 0.8%. Cerium, boron are introduced into the metal by calculation and chemical analysis is not determined. It is allowed to introduce yttrium, the estimated content of which in the range of 0.005-0.10% is established by the supplier's technological instructions and its residual content in the metal is not determined by chemical analysis. In the finished metal, deviation in the silicon content by +0.10%, nitrogen by +0.010%, aluminum by +0.10% is allowed.
Mechanical characteristics
| sT|s0,2, MPa |
σB, MPa |
d5, % |
| Sheet metal in delivery condition on the other 14-1-2131-77. Heating to 1050-1090 °C (the heating time is 5 minutes per 1 mm thickness), cooling in water or under water shower |
| ≥196 |
≥490 |
≥30 |
Description mechanical marks
| Name |
Description |
| 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 |
Technological properties
| Name |
The value |
| Corrosion resistance |
ХН40МДБ alloy possesses exceptionally high resistance to pitting and pitting corrosion, corrosion cracking in chloride and hydrogen sulfide-containing media. |
| Foreign analogues |
C-NiCr22Fe20Mo7Cu2 (ISO 12725); HASTELLOY G-3 alloy (HAYNES); NW6985 (Japan) |
