ASME SB677 TP904L Industrial Nickel Alloy Pipe
ASME SB677 TP904L Industrial Nickel Alloy Pipe
ASME SB677 TP904L is a nickel alloy pipe made from low-carbon, high-alloy austenitic stainless steel. It offers excellent corrosion resistance, particularly in sulfuric acid and chloride environments. Rich in nickel, chromium, molybdenum, and copper, this pipe is suitable for the harsh environments of the chemical process industry, oil and gas, and seawater cooling systems. These pipes are known for their high strength, toughness, good weldability, and formability.
What are the specifications for 904L pipe?
UNS N08904 pipe has a density of 7.95 g/cm³, meeting international and national standards. These pipes have a melting point as high as 1350°C. 904L pipe is widely used where the corrosion resistance of 316L and 317L pipes is insufficient.
ASME SB677, a material standard in Part B, Division II of the ASME Boiler and Pressure Vessel Code, is titled "Nickel Alloy Seamless Pipe and Tubing." This standard specifies the chemical composition, mechanical properties, dimensional tolerances, and other requirements for nickel and nickel-cobalt alloy seamless pipe. TP904L pipe refers to a specific type of high-performance austenitic stainless steel, often referred to as "super austenitic stainless steel." However, due to its high nickel content (approximately 25%), its properties are closer to those of nickel-base alloys, particularly in terms of corrosion resistance. Therefore, in commercial and industrial classifications, it is often referred to as a nickel-base alloy.
ASME SB677 TP904L Nickel Alloy Pipe Composition Range
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
| 904L | 0.020 | 2.00 | 1.00 | 0.045 | 0.035 | 19.0-23.0 | 4.0-5.0 | 23.0-28.0 | 1.0-2.0 |
ASME SB677 TP904L Nickel Alloy Pipe Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) | Brinell (HB) | ||||
| 904L | 490 | 220 | 35 | 70-90 typical | - |
ASME SB677 TP904L Nickel Alloy Pipe Typical physical Properties
| Grade | Density (kg/m3) |
Elastic Modulus (GPa) |
Mean Co-eff of Thermal Expansion (m/m/C) | Thermal Conductivity (W/m.K) |
Specific Heat 0-100C (J/kg.K) |
Elec Resistivity (n.m) |
|||
| 0-100C | 0-315C | 0-538C | At 20C | At 500C | |||||
| 904L | 8000 | 200 | 15 | - | - | 13 | - | 500 | 850 |
Typical Applications of ASME SB677 TP904L Nickel Alloy Tubing
Petrochemical and Natural Gas: Offshore oil and gas platform process piping systems (especially those handling chlorine-containing media); heat exchangers and piping in flue gas desulfurization systems; and treatment of acidic environments containing hydrogen sulfide and carbon dioxide.
Process Chemical Industry: Sulfuric acid production, storage, and transportation equipment (e.g., coolers, piping, pumps, and valves); phosphoric acid and phosphate fertilizer production equipment; and production facilities for organic acids such as acetic and formic acids.
Environmental Protection and Water Treatment: Seawater cooling piping systems; landfill leachate treatment and high-chloride wastewater treatment systems.
Pulp and Paper and Pharmaceutical Industries: Equipment and piping handling corrosive chemicals.
Types and Forms
Seamless and Welded: Available in both seamless (extruded for increased strength) and welded (ERW and EFW) forms.
Shapes: Available in a variety of shapes, including round, square, and U-shaped (for heat exchangers).
Quality and Testing
Quality Control: Produced under stringent quality control procedures.
Testing: Extensively tested, including eddy current testing, ultrasonic testing, and other corrosion and microscopic testing.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications. We also offer customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.
