ASTM B677 UNS N08904 Nickel Alloy Steel Seamless Round Tube For Boiler

ASTM B677 UNS N08904 Nickel Alloy Steel Tube

Overview

ASTM B677 is the standard specification for seamless, welded, and heavily cold worked austenitic stainless steel pipes made from UNS N08904 (Alloy 904L). This standard specifies the requirements for the chemical composition, mechanical properties, dimensions, and tolerances of pipes made from UNS N08904.

Here are some key points covered in the ASTM B677 standard for UNS N08904:Chemical Composition: The standard specifies the required chemical composition of UNS N08904, including the percentages of elements such as nickel (Ni), chromium (Cr), molybdenum (Mo), copper (Cu), and others. These elements contribute to the corrosion resistance and mechanical properties of the alloy.Mechanical Properties: ASTM B677 defines the minimum tensile strength, yield strength, and elongation requirements for UNS N08904 pipes. These properties ensure the mechanical integrity and performance of the pipes in various applications.Manufacturing Process: The standard covers the methods of manufacturing, which include seamless and welded methods. It also outlines the process of cold working, which enhances the strength and durability of the pipes.

Chemical Composition of ASTM B677 UNS N08904

Mechanical Properies of ASTM B677 UNS N08904

Uses&Application

1>.Chemical and Petrochemical Processing: Alloy 904L is extensively used in chemical and petrochemical industries for equipment such as reactors, heat exchangers, storage tanks, and piping systems. It provides excellent resistance to acids, including sulfuric acid, phosphoric acid, and organic acids.

2>.Marine and Coastal Environments: Due to its superior resistance to corrosion in seawater and chloride-containing environments, ASTM B677 UNS N08904 is widely employed in marine applications. It is used for offshore platforms, seawater cooling systems, desalination plants, and marine exhaust systems.

3>.Oil and Gas Industry: Alloy 904L is utilized in the oil and gas industry for various applications, including downhole equipment, offshore drilling equipment, and pipelines. Its resistance to sulfide stress cracking and corrosion in oilfield environments makes it suitable for harsh conditions.

4>.Medical and Pharmaceutical: The alloy is used in medical and pharmaceutical applications where corrosion resistance and hygiene are crucial. It is employed in pharmaceutical processing equipment, surgical instruments, and implants.

5>.Aerospace Industry: ASTM B677 UNS N08904 finds applications in the aerospace sector, particularly in components exposed to corrosive environments, such as aircraft fuel systems, hydraulic systems, and engine components.