NH9 alloy (Chromel)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
НХ9 |
| Designation GOST Latin |
HX9 |
| Transliteration |
NH9 |
| The chemical elements |
NiCr9 |
| Name |
The value |
| Designation GOST Cyrillic |
Хромель К |
| Designation GOST Latin |
Xpomel K |
| Transliteration |
Hromel K |
| The chemical elements |
Crомель |
Description
Alloy NH9 applies: for production of wire intended for the manufacture of countervailing wires.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 28873-90, GOST 492-2006 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
As |
Al |
Sb |
Pb |
Bi |
Co |
Mg |
Ni+Co |
| GOST 492-2006 |
≤0.2 |
≤0.01 |
≤0.003 |
≤0.3 |
8.5-10 |
≤0.4 |
87.129-91.1 |
≤0.3 |
≤0.25 |
≤0.002 |
≤0.15 |
≤0.002 |
≤0.002 |
≤0.002 |
0.4-1.2 |
≤0.05 |
The rest |
Ni is the basis.
According to GOST 492-2006, the total mass fraction of impurities is ≤ 1.40%.
Mechanical characteristics
| Section, mm |
σB, MPa |
d |
Brinell hardness number, MPa |
| Wire in the delivery state |
|
600-700 |
34-45 |
150-200 |
|
1100 |
≥3 |
≥300 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| d |
Elongation after rupture |
