800H
800H alloys are nickel-iron-chromium alloys designed to resist oxidation and carburization at elevated temperatures. The nickel content, 32%, makes the alloys highly resistant both to chloride stress-corrosion cracking and to embrittlement from precipitation of sigma phase. The general corrosion resistance is excellent. In the solution annealed condition. This alloy also has superior creep and stress rupture properties.
Inventory Size Ranges for
800H
| Type |
Thickness |
AMS Standards | ASTM | ASME | Get a Quote |
| Coil |
0.040" & 0.063" |
AMS 5871 | ASTM B 409 | ASME SB 409 |
Get a Quote
|
| Sheet |
0.040" & 0.063" |
AMS 5871 | ASTM B 409 | ASME SB 409 |
Get a Quote
|
Not finding what you are looking for? Connect with our specialty metals sourcing group.
Characteristics of 800H
800H is a solution heat-treated, controlled-carbon version of Alloy 800 and has improved creep and stress-rupture characteristics. This alloy is designed for applications involving prolonged exposure to high temperatures.
Working with 800H
These alloys are readily weldable by most standard processes in the solution-annealed condition. It is best machined using low cutting speeds and continuous tool engagement to mitigate work hardening.
Other industry standards we comply with:
Common Trade Names
- ATI 800 (™ Allegheny Technologies)
- ATI 800H (™ Allegheny Technologies)
- ATI 800AT (™ Allegheny Technologies)
Industry Applications for
800H
- Heat exchanger
- Dampers
- Pressure vessels
- Reforming components
- Industrial heating
Chemical Composition
Chemical Composition Percentage of 800H
|
Element |
Min |
Max |
| C |
Carbon |
- |
0.08 |
| Mn |
Manganese |
- |
1.0 |
| P |
Phosphorus |
- |
0.02 |
| S |
Sulfur |
- |
0.01 |
| Si |
Silicon |
- |
0.35 |
| Cr |
Chromium |
- |
21.0 |
| Ni |
Nickel |
- |
32.0 |
| Ti |
Titanium |
- |
0.40 |
| Al |
Aluminum |
- |
0.40 |
| Cu |
Copper |
- |
0.30 |
Physical Properties
- Density: 0.29 lb/in3
- Magnetic Permeability: < 1.02
- Specific Heat: 0.12 Btu/lb°F
- Electrical Resistivity: 99 microhm-cm at 70°F (21°C)
Coefficient of Thermal Expansion| Temperature, °F | 70-200 | 70-1000 | 70-1200 | 70-1400 |
|---|
| in/in°F x 10-6 | 7.9 | 9.4 | 9.6 | 9.9 |
Thermal Conductivity| Temperature, °F | 70 | 70-800 | 70-1800 |
|---|
| Btu-ft/ft2 -hr-°F | 6.7 | 10.6 | 17.8 |
100 Hour Still Air Continuous Oxidation Tests| Temperature, °F | 1700 | 1800 | 1900 | 2000 | 2100 |
|---|
| Sample Weight Gain (mg/cm2) | 0.77 | 1.8 | 2.09 | 2.1 | 5.06 |
Mechanical Properties
Mechanical Properties and Yield Strength of Alloy 800H| Temperature, °F | 70 | 1000 | 1200 | 1400 | 1500 |
|---|
| 0.2% Yield Strength, ksi | 43 | 31.7 | 29 | 22.6 | 14.2 |
| Ultimate Tensile Strength, ksi | 87.7 | 72 | 54 | 32.1 | 24.8 |
| Elongation | 44% | 39% | 56% | 85% | 91% |
Additional Info
