Alloy 27
Designation
| Name |
The value |
| Designation GOST Cyrillic |
27 |
| Designation GOST Latin |
27 |
| Transliteration |
27 |
| The chemical elements |
27 |
Description
Alloy 27 is applied: for rolled metal production, manufacturing of ingots and semifinished products and the manufacture of parts of special equipment, parts of aircraft and instrumentation.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
OST 1 92077-91, TU 1-5-132-78 |
Chemical composition
| Standard |
C |
Si |
Fe |
N |
Al |
V |
Ti |
Nb |
O |
Zr |
| OST 1 92077-91 |
≤0.1 |
≤0.12 |
≤0.25 |
≤0.04 |
3-4.2 |
0.7-1.5 |
The rest |
0.7-1.5 |
≤0.14 |
2-3 |
Ti is the basis.
According to OST 1 92077-91 the total allowable content of Cu + Ni ≤ 0.10%, including Ni ≤ 0.08%. The amount of other impurities (not listed in the table, including copper and nickel) ≤ 0.30%. The content of hydrogen in ingots should be ≤ 0.006%. Addition of modifying additives in an amount of ≤ 0.003% is allowed. The alloy modified with boron has an additional index "B".
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
| The billet according to TU 1-5-132-78. Annealing |
| Образец 15х15 |
≥441 |
588-736 |
≥15 |
≥32 |
≥810 |
| Образец 15х15 |
≥265 |
≥343 |
- |
- |
- |
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 |
| kJ/m2 |
Toughness |
