ASTM B283 C70620 Copper Nickel Alloy Steel Flange Forged Blind Flange BLRF

• Composition: 90% Copper, 10% Nickel

• Corrosion Resistance: Excellent resistance to corrosion in seawater and other marine environments.

• Strength: Moderate to high strength, good ductility, and formability.

• Typical Uses: Marine applications, heat exchangers, piping systems.

• Composition: 70% Copper, 30% Nickel

• Corrosion Resistance: Better than C70620 in terms of pitting and crevice corrosion, particularly in more aggressive environments.

• Strength: Higher than C70620, providing increased tensile and yield strength.

• Typical Uses: More demanding marine applications, condenser tubes, and chemical process equipment.

• Composition: 90% Copper, 10% Nickel, with a small percentage of Tin.

• Corrosion Resistance: Good, but typically less than C70620 due to lower nickel content.

• Strength: Lower strength compared to C70620, but improved machinability.

• Typical Uses: Used in applications requiring good formability and machinability, like some types of fittings and components.

• Corrosion Resistance: C71500 offers superior corrosion resistance in brackish water compared to C70620.

• Mechanical Properties: C71500 has higher strength and is often used in more severe service conditions where structural integrity is crucial.

Summary

1. Corrosion Resistance: C71500 > C70620 > C44300 (in marine environments).

2. Strength: C71500 > C70620 > C44300.

3. Applications: C70620 is versatile for many marine applications, while C71500 is ideal for harsher conditions. C44300 is suitable when good machinability is required.