Alloy MA21 (ИМВ2)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
МА21 |
| Designation GOST Latin |
MA21 |
| Transliteration |
MA21 |
| The chemical elements |
CuAl21 |
| Name |
The value |
| Designation GOST Cyrillic |
ИМВ2 |
| Designation GOST Latin |
IMB2 |
| Transliteration |
IMV2 |
| The chemical elements |
YВ2 |
Description
Alloy MA21 is used: for the manufacture of semi-finished products (sheets, plates, bars, rods, profiles, strips, tubes, wire, stampings and forgings) by hot deformation, as well as ingots and slabs intended for the production of sredneshirotnykh parts operating at temperatures up to +100−125 °C and cryogenic temperatures requiring high stiffness and high compressive strength.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 14957-76 |
Chemical composition
| Standard |
Mn |
Si |
Ni |
Fe |
Cu |
Al |
Zn |
Ce |
Mg |
Cd |
Na |
Li |
K |
| GOST 14957-76 |
≤0.1 |
≤0.1 |
≤0.005 |
≤0.03 |
≤0.04 |
4.3-5.3 |
1-2 |
≤0.15 |
The rest |
4-5 |
≤0.005 |
7.5-9 |
≤0.005 |
Mg is the basis.
According to GOST 14957-76 the mass fraction of other impurities is ≤ 0.30%. "Other impurities" include impurities whose permissible content limits are not indicated (≤), as well as impurities not included in the table, the content of which is not determined.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
Brinell hardness number, MPa |
| Rolled steel in the delivery state |
|
≥190 |
≥240 |
≥18.5 |
≥26 |
≥70 |
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 |
