N08825 Seamless Pipe Material Analysis

Material Properties

 

1. Chemical Composition

Incoloy 825 is a nickel-iron-chromium alloy. Its chemical composition (by mass percentage) includes:

Nickel (Ni): 38%-46%

Chromium (Cr): 19.5%-23.5%

Iron (Fe): Balance

Molybdenum (Mo): 2.5%-3.5%

Copper (Cu): 1.5%-3.0%

Titanium (Ti): 0.6%-1.2%

Carbon (C): ≤0.025%

Manganese (Mn): ≤1.0%

Silicon (Si): ≤0.5%

 

2. Physical Properties

Density: 8.14 g/cm³

Density: 8.14 g/cm³

 

3. Mechanical Properties

Tensile Strength: 550 N/mm²

Yield Strength: 220 N/mm²

Elongation: 30%

Brinell Hardness: Not exceeding 200

 

 

Performance Advantages

 

1. Corrosion Resistance

Resists acid and alkali corrosion in both oxidizing and reducing environments, especially in chloride-containing environments (such as seawater).

Excellent corrosion resistance against media such as sulfuric acid, phosphoric acid, nitric acid, and organic acids.

 

2. High Temperature Resistance

Maintains excellent mechanical properties from room temperature to 550°C, and is certified for pressure vessels up to 450°C. Resistance to Stress Corrosion Cracking

 

3. Resistance to Stress Corrosion Cracking

The high nickel content provides effective resistance to stress corrosion cracking.

 

4. Processing and Weldability

Easily processed into various shapes and sizes, with excellent weldability and stable weld joints.

 

Applications

 

1. Chemical Industry

Heating pipes, containers, baskets, and chains are used in sulfuric acid pickling plants.

Heat exchangers, evaporators, washing, and immersion pipes are used in phosphoric acid production.

 

2. Oil and Gas Industry

Air-to-air heat exchangers in oil refining.

Oil well casing, Christmas trees, and submarine pipelines, etc.

 

3. Marine Engineering

Seawater cooling heat exchangers, marine product piping systems, and sour gas environment piping.

Seawater desalination equipment, submarine cable sheathing, etc.

 

4. Other Industries

Food processing, flame-retardant alloys for high-pressure oxygen applications, etc.

 

Implementation Standards

 

Implementation Standards: American Society for Testing and Materials (ASTM) standards for bars, forgings, plate (strip), wire, and pipes are used to ensure product quality.