Alloy steel pipe astm a335 grade p91 dealers mumbai

Alloy steel pipe astm a335 grade p91 dealers mumbai

ASTM A335 Grade P91 is a specification for seamless alloy steel pipes intended for high-temperature service. Here's a detailed overview: ASTM A335 Grade P91 Alloy Steel Pipe

1. Material Type:

Alloy steel, specifically a chromium-molybdenum (Cr-Mo) steel.

2. Composition:

Primarily designed with about 9% Chromium (Cr) and 1% Molybdenum (Mo).

Other elements typically include Carbon (C), Manganese (Mn), Silicon (Si), Nickel (Ni), and Vanadium (V), optimized for high strength and resistance to high-temperature creep.

3. Applications:

Used in power plants, refineries, and petrochemical industries.

Suitable for high-temperature and high-pressure services such as steam pipelines, heat exchangers, boilers, and superheaters.

Excellent resistance to oxidation and creep at elevated temperatures.

4. Key Properties:

High-temperature strength: Maintains strength at temperatures up to about 600–650°C (1112–1202°F).

Creep resistance: Designed for long-term exposure to elevated temperature and stress.

Good weldability: Can be welded using proper procedures; post-weld heat treatment (PWHT) is generally required.

Corrosion resistance: Good resistance to oxidation in high-temperature environments.

5. Specification Details:

ASTM standard: ASTM A335/A335M

Grade: P91

Type: Seamless pipe

Size range: Typically from 1/2' to 48' diameter (varies by manufacturer)

Wall thickness: Various, depending on schedule