ASTM B677 TP904L UNS N08904 Stainless Steel Seamless Pipe

ASTM B677 TP904L UNS N08904 Stainless Steel Seamless Pipe

Product Overview

ASTM B677 TP904L stainless steel seamless pipe is a high-alloy austenitic stainless steel pipe designed for demanding corrosive environments. Manufactured in accordance with ASTM B677, TP904L (UNS N08904) contains elevated levels of nickel, chromium, molybdenum, and copper, providing excellent resistance to reducing acids, chloride-induced corrosion, and pitting.

YUHONG supplies ASTM B677 TP904L seamless pipes in a wide range of sizes for chemical processing, offshore engineering, heat exchangers, desalination plants, and other industrial applications where long service life and corrosion resistance are essential.

Product Specifications

Chemical Composition

Key Features

• Excellent Corrosion Resistance

The high nickel and molybdenum content provides outstanding resistance to sulfuric acid, phosphoric acid, chloride-containing environments, and many aggressive chemical media.

• High Resistance to Pitting and Crevice Corrosion

TP904L performs well in environments where conventional 304L or 316L stainless steel may suffer localized corrosion.

• Good Weldability and Fabrication

The low carbon content helps reduce the risk of intergranular corrosion after welding, making the material suitable for fabrication into process equipment and piping systems.

• Reliable Mechanical Performance

ASTM B677 TP904L seamless pipe offers stable mechanical properties and dimensional accuracy for industrial piping applications requiring long-term reliability.

Typical Applications

ASTM B677 TP904L seamless pipes are widely used in:

• Chemical processing plants

• Petrochemical facilities

• Fertilizer production

• Seawater desalination systems

• Heat exchangers and condensers

• Offshore platforms

• Pulp and paper processing

• Pharmaceutical equipment

• Food processing systems

• Marine engineering

Quality Control

Every TP904L seamless pipe can be supplied with comprehensive inspection according to customer requirements, including:

• Positive Material Identification (PMI)

• Hydrostatic Testing

• Eddy Current Testing

• Ultrasonic Testing (UT)

• Visual & Dimensional Inspection

• Chemical Composition Verification

• Mechanical Property Testing

• EN 10204 3.1 Material Test Certificate

• Third-Party Inspection (SGS, BV, TÜV, DNV) upon request

Packaging

To ensure safe transportation and export, ASTM B677 TP904L seamless pipes are typically packed with:

• Plastic end caps

• Waterproof wrapping

• Bundles secured with steel strips

• Plywood cases

• Fumigation-free wooden cases

• Steel frame packing for large-diameter pipes

• Standard seaworthy export packing

Why Choose YUHONG

• Extensive supply experience in corrosion-resistant alloy piping

• Wide range of ASTM, ASME, and EN material grades

• Flexible sizes and customized lengths

• Strict quality inspection before shipment

• Support for third-party inspection

• Export-ready packaging for international projects

• Fast response for technical inquiries and quotations

Frequently Asked Questions

• What is ASTM B677 TP904L seamless pipe used for?

It is primarily used in highly corrosive environments such as chemical processing, offshore engineering, desalination plants, and heat exchanger systems where enhanced corrosion resistance is required.

• What is the equivalent material of TP904L?

TP904L is commonly designated as UNS N08904 and is internationally recognized as a high-alloy austenitic stainless steel with excellent resistance to aggressive chemical media.

• Can ASTM B677 TP904L pipes be supplied with inspection certificates?

Yes. EN 10204 3.1 material certificates are available, and third-party inspections such as SGS, BV, TÜV, or DNV can be arranged upon request.

• What sizes are available?

Common outside diameters range from 6 mm to 610 mm, with wall thicknesses from 0.5 mm to 40 mm. Customized dimensions can also be supplied based on project requirements.

• What surface finishes are available?

Typical finishes include annealed and pickled, while polished surfaces can be supplied when specified for equipment fabrication or special applications.

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