The alloy is 1.4958 Germany face-centered cubic lattice structure. Very low carbon content and increase of Ti: C ratio increased structural stability and the largest allergy resistance and resistance to intergranular corrosion. Low-temperature annealing of 950 degrees Celsius to ensure the fine grain structure.
1.4958 Overview of features and applications:
The alloy corrosion resistant to many corrosive media. Its high nickel content in the aqueous corrosion conditions it has very good resistance to stress corrosion cracking. High chromium content so that it has better resistance to pitting and crevice corrosion cracking. The alloy has good resistance to nitric acid, organic acid corrosion, but in sulfuric acid and hydrochloric acid corrosion resistance is limited. In addition to the halide pitting corrosion may occur, but in oxidizing and non oxidizing salt has good corrosion resistance. In water, steam and steam, air, carbon dioxide mixture also has good corrosion resistance. Condenser used in nitric acid - nitric acid corrosion resistance, steam heating pipes - very good mechanical properties, the heating element tube - very good mechanical properties.
1.4958 Chemical composition:
|
Alloy |
% |
Nickel |
Chromium |
Iron |
Carbon |
Manganese |
Silicon |
Copper |
Sulfur |
Aluminum |
Titanium |
|
800 |
Least |
30 |
19 |
|
|
|
|
|
|
0.15 |
0.15 |
|
Maximum |
35 |
23 |
Margin |
0.10 |
1.5 |
1 |
0.75 |
0.015 |
0.60 |
0.60 | |
|
800H |
Least |
30 |
19 |
|
0.05 |
|
|
|
|
0.15 |
0.15 |
|
Maximum |
35 |
23 |
Margin |
0.10 |
1.5 |
1 |
0.75 |
0.015 |
0.60 |
0.60 | |
|
800HT |
Least |
30 |
19 |
|
0.06 |
|
|
|
|
0.15 |
0.15 |
|
Maximum |
35 |
23 |
Margin |
0.10 |
1.5 |
1 |
0.75 |
0.015 |
0.60 |
0.60 | |
|
Al + Ti is 0.85-1.20 | |||||||||||
