What kind of metal is Hastelloy - Knowledge

1.What kind of metal is Hastelloy?

Hastelloy is a group of nickel-based superalloys specifically engineered for exceptional corrosion resistance and high-temperature durability. These alloys primarily consist of nickel as the base metal, alloyed with elements like chromium, molybdenum, cobalt, and tungsten to withstand harsh chemical environments and extreme temperatures where conventional metals might fail.

2.What is another name for Hastelloy?

Another name for Hastelloy often refers to its standardized designations in material classification systems. For example, Hastelloy C-276 is commonly known by its UNS (Unified Numbering System) code UNS N10276, while Hastelloy B-3 is designated as UNS N10675. In some contexts, it may also be referred to by its composition-based terms, such as "nickel-chromium-molybdenum alloy" or "nickel-molybdenum alloy," depending on the specific grade.

3.What is the ASTM standard for Hastelloy pipe?

The ASTM (American Society for Testing and Materials) standards for Hastelloy pipes vary by grade and application. Common standards include:

ASTM B622: Specifies seamless and welded nickel-alloy pipes for general corrosion-resistant service.

ASTM B619: Covers welded nickel-alloy pipes for high-temperature applications.

ASTM B626: Details welded nickel-alloy pipes for corrosive or high-temperature services.

ASTM B829: Addresses seamless and welded nickel-alloy pipes for chemical process industries.

info-441-447 info-446-445

info-438-443 info-444-443

4.What is the material code for hastelloy?

Material codes for Hastelloy are defined by international standards:

UNS Numbers: For instance, Hastelloy C-22 is N06022, Hastelloy G-30 is N06030, and Hastelloy X is N06002.

DIN/ISO Codes: Examples include Hastelloy C-276 as 2.4819 and Hastelloy B-3 as 2.4600.

ASTM Designations: Such as B575 for plates, sheets, and strips, or B622 for pipes.

5.What are the advantages of Hastelloy?

The advantages of Hastelloy alloys include:

Exceptional Corrosion Resistance: Resistance to strong acids (e.g., hydrochloric, sulfuric, phosphoric), chlorides, and both oxidizing and reducing environments, with high immunity to pitting, crevice corrosion, and stress corrosion cracking.

High-Temperature Stability: Maintains mechanical strength and structural integrity at temperatures up to 1,200°C (2,192°F), depending on the grade, making it suitable for extreme thermal conditions.

Versatility in Harsh Environments: Ideal for chemical processing, oil and gas refining, marine engineering, nuclear applications, and pharmaceutical equipment where aggressive media are present.

Mechanical Robustness: Offers high tensile strength and ductility, even after welding, enabling complex fabrications and long-term reliability.

Tailored Grades for Specific Needs: Diverse compositions (e.g., high chromium for oxidation resistance or high molybdenum for acid resistance) allow customization for specialized industrial requirements.