Incoloy 825 is a nickel-iron-chromium alloy that has been developed to provide exceptional resistance to both reducing and oxidizing environments. It also offers excellent resistance to stress corrosion cracking and pitting due to its high nickel content. This alloy is used in many industries, including chemical processing, oil and gas production, power generation, and marine engineering. Let’s take a closer look at the composition of this alloy and how it can benefit your business.
What Forms is 825 Incoloy Available at Piping Mart?
- Incoloy 825 Pipes
- Incoloy 825 Forged Fittings
- Incoloy 825 Pipe Fittings
- Incoloy 825 Tubing
- Incoloy 825 Plates
- Incoloy 825 Bolts
- Incoloy 825 Valves
- Incoloy 825 Flanges
- Incoloy 825 Fasteners
- Incoloy 825 Nuts
- Incoloy 825 Washer
825 Incoloy Composition
Incoloy 825 is composed of 38–46% nickel, 22–30% chromium, 2–3% molybdenum, 1.5–3% iron, 0.6–1.2% manganese, 0.15–0.6% titanium, 0.05–0.5% aluminum, 0.05% carbon (max) and trace amounts of other elements such as silicon and copper for improved corrosion resistance in specific environments. This combination gives Incoloy 825 excellent resistance to oxidation and corrosion at higher temperatures than most other metals or alloys can withstand without succumbing to degradation or failure over time.
|
Element |
% |
Element |
% |
|
Nickel |
38.0 – 46.0 |
Carbon |
0.05 max |
|
Chromium |
19.5 – 23.5 |
Manganese |
1.0 max |
|
Molybdenum |
2.5 – 3.5 |
Sulfur |
0.03 max |
|
Copper |
1.5 – 3.0 |
Silicon |
0.5 max |
|
Titanium |
0.6 – 1.2 |
Aluminium |
0.2 max |
|
Iron |
22.0 min (~33%) |
|
|
825 Incoloy Physical Properties
Incoloy 825 is a nickel and chromium-alloyed super alloy. This alloy is known for its excellent mechanical properties and impressive corrosion resistance. It can be used as inconel sheet for structural components in land, sea and air based applications that require durability and strength even at elevated temperatures. Its chemical composition makes it highly resistant to stress-corrosion cracking and pitting, offering exceptional levels of resistance in moderately oxidizing acids such as nitric acid and sulfuric acid. In addition to its corrosion resistance, incoloy 825 has excellent weldability, thermal fatigue strength and superior mechanical strength, making it suitable for the most demanding environments and applications.
| Physical Properties | °F | British Units | °C | Metric Units |
| Density | Room | 0.294 lb./in.(3) | Room | 8.14 g/cm(3) |
| Electrical Resistivity |
Room 200 400 600 800 |
44.4 microhm-in. 44.9 microhm-in. 46.5 microhm-in. 47.6 microhm-in. 49.2 microhm-in. |
Room 93 204 316 427 |
1.13 microhm-m 1.14 microhm-m 1.18 microhm-m 1.21 microhm-m 1.25 microhm-m |
| Mean Coefficient of Thermal Expansion |
80-200 80-400 80-600 80-800 |
7.9 microin./in.-°F 8.3 microin./in.-°F 8.5 microin./in.-°F 8.7 microin./in.-°F |
27-93 27-204 27-316 27-427 |
14.0 X 10(-6)m/m-K 14.9 X 10(-6)m/m-K 15.3 X 10(-6)m/m-K 15.7 X 10(-6)m/m-K |
| Thermal Conductivity |
Room 200 400 600 800 |
77 Btu-in/ft²-hr-°F 85 Btu-in/ft²-hr-°F 98 Btu-in/ft²-hr-°F 110 Btu-in/ft²-hr-°F 120 Btu-in/ft²-hr-°F |
Room 93 204 316 427 |
11.1 W/m-K 12.3 W/m-K 14.1 W/m-K 15.9 W/m-K 17.3 W/m-K |
| Dynamic Modulus of Elasticity |
Room | 28.0 x 10(6) psi | Room | 193 GPa |
825 Incoloy Mechanical Properties
Inconel sheet material is an important type of alloy comprised of a number of unique elements, including nickel, chromium, and molybdenum. Among this base material’s most valuable attributes is the fact that it has excellent mechanical properties. Incoloy 825 sheet in particular offers superior strength and fracture toughness due to its high degree of resistance to corrosion, as well as its good machinability and consistent weldability. All these factors make Inconel sheet an ideal choice for projects where design integrity and longevity are paramount, such as components used in the automotive or petrochemical industries.
| Form | Condition | Ultimate Tensile Strength, ksi (MPa) |
Yield Strength at 0.2% offset, ksi (MPa) |
Elongation in 2″ or 4D, percent |
| Sheet Plate Sheet, Plate Strip, Bar |
Annealed AnnealedAnnealed |
100 (689) 95 (655)85 (590)a |
55 (379) 45 (310)35 (240)a |
39 4430a |
825 Incoloy Equivalent
|
Country |
Body |
Designation |
|
USA |
UNS |
N08825 |
|
France |
AFNOR |
NC 21 FeDU |
|
GB |
BS |
NA 16 |
|
Germany |
DIN |
NiCr21Mo |
|
Germany |
Werkstoff |
Nr 2.4858 |
825 Incoloy Specifications
- ASTM B425
- BS 3075 NA 16
- BS 3076 NA 16
- ISO 15156-3
- (NACE MR 0175)
825 Incoloy Uses
-
Chemical Processing
Incoloy 825 is often used in chemical processing due to its resistance to corrosion from acids. The alloy is also resistant to pitting and crevice corrosion.
-
Power Generation
Incoloy 825 is also used in power generation, as it is resistant to corrosion from high-temperature water and steam. The alloy is also resistant to stress-corrosion cracking.
-
Oil and Gas
Incoloy 825 is used in the oil and gas industry due to its resistance to corrosion from sour crude oil and natural gas. The alloy is also resistant to stress-corrosion cracking.
-
Pulp and Paper
Incoloy 825 is used in the pulp and paper industry due to its resistance to corrosion from acidic chemicals. The alloy is also resistant to pitting and crevice corrosion.
-
Pharmaceuticals
Incoloy 825 is used in the pharmaceutical industry due to its resistance to corrosion from acidic chemicals. The alloy is also resistant to pitting and crevice corrosion.
-
Food Processing
Incoloy 825 is used in food processing due to its resistance to corrosion from acidic chemicals. The alloy is also resistant to pitting and crevice corrosion.
-
Marine Environments
Incoloy 825 is used in marine environments due to its resistance to corrosion from salt water and marine organisms. The alloy is also resistant to pitting and crevice corrosion.
-
Waste Treatment
Incoloy 825 is used in waste treatment due to its resistance to corrosion from acidic chemicals
825 Incoloy Density & Hardness
The density of Incoloy 825 is around 8 g/cm3, which makes it lightweight yet strong enough for most applications where strength is required, such as fasteners or pressure vessels. Its hardness ranges from 65-85 Rockwell B, depending on the exact composition ratio. Generally speaking, it is considered a moderately hard material with some ductility for forming operations that require complex shapes or intricate details in design work like jewelry or medical components. Furthermore, it has good weldability so that it can be joined easily, which may be important for larger pieces needing assembly on-site rather than being manufactured in one piece elsewhere then shipped in bulk form or preassembled units, which might be necessary when space restrictions are an issue due to weight concerns especially if offloading with cranes, etc. are not possible due to structural limitations at the destination location.
Conclusion
In conclusion, Incoloy 825 provides exceptional corrosion resistance along with good weldability making it ideal for many applications where strength combined with durability are crucial factors for success – whether you’re looking into using this material for chemical processing plants or medical implants you can rest assured knowing that this alloy meets all standards set by ASTM International while offering excellent value compared to its more expensive counterparts like Titanium Alloys, etc. so if you’re considering using this material then make sure you weigh up all options before committing your resources towards any specific option out there! Thanks for reading!
A passionate metal industry expert and blogger. With over 5 years of experience in the field, Palak brings a wealth of knowledge and insight to her writing. Whether discussing the latest trends in the metal industry or sharing tips, she is dedicated to helping others succeed in the metal industry.
