ASTM B677 904L Tubing for Marine Applications
Aug 28, 2025
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If you are looking for high-performance stainless steel tubing that can withstand the harsh marine environment, ASTM B677 904L tubing is one of the best choices. Known for its excellent seawater corrosion resistance, high strength, and durability, 904L tubing ensures long service life in offshore, shipbuilding, and desalination projects.
What is ASTM B677 specification?
ASTM B677 is a ASTM International specification that defines the requirements for seamless, cold-worked or hot-finished pipes and tubes made from high-performance nickel-iron-chromium-molybdenum and iron-nickel-chromium-molybdenum-copper alloys, such as UNS N08925, N08354, and N08926, for general corrosive service applications.
What is ASTM B677 TP 904L Stainless Steel Seamless Tubes?
ASTM B677 TP 904L Stainless Steel Seamless Pipes are manufactured from high-alloy super austenitic stainless steel (UNS N08904), demonstrating exceptional corrosion resistance in strongly reducing acids, chloride-rich environments, and high-temperature conditions. Here, "TP" denotes pipe, while "904L" refers to this specific 904L stainless steel grade, which contains high levels of chromium, nickel, molybdenum, and copper. Pipes produced to this specification can be either seamless or thermally/cold worked.
Typically, pipes manufactured to ASTM B677 UNS N08904 grade are suitable for general corrosive service. We also supply SS 904L pipes in the solution-treated condition, which are heat treated and subsequently quenched in water or rapidly cooled by other methods. For the best pricing on ASTM B677 904L seamless pipes, please contact us.
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Grade specifications for 904L Stainless Steel Tubes
|
Coefficient of thermal expansion ( x10-6 K-1 ) |
16-18 @ 20-100°C |
|
Maximum use temperature in air ( °C ) |
800 |
SS 904L Tubing Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | MO | Ni | Cu | |
| 904L | min. | – | – | – | – | – | 19.0 | 4.0-5.0 | 23.0 | 1.0 |
| max. | 0.20 | 2.0 | 1.0 | 0.045 | 0.035 | 23.0 | 28.0 | 2.0 | ||
904L Stainless Steel Tubes Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 446 | 490 | 220 | 35 | 70-90 typical | – |
SS 904L Tube Physical Properties
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| 904L | 7500 | 200 | 15.00 | – | – | 13 | – | 500 | 850 |
Applications in Marine Industry
ASTM B677 904L tubing is widely used in:
Seawater desalination plants
Shipbuilding and offshore platforms
Heat exchangers and condensers
Ballast water systems
Marine exhaust scrubbers
If you have a project need for ASTM B677 TP 904L Stainless Steel Pipe, we welcome your order. GNEE has a large inventory of popular products for you to choose from. We process these products into a variety of practical product forms, including sheet, coil, tube, bar, and wire. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.Email: sales@gneestainless.com
ASTM B677 904L Tubing Specifications
| Standard | ASTM B677 |
|---|---|
| Grade | 904L / UNS N08904 / 1.4539 |
| Outer Diameter | 6mm – 530mm |
| Wall Thickness | 0.5mm – 30mm |
| Length | 1m – 12m (custom available) |
| Finish | Bright annealed, pickled, polished |
| Form | Seamless & Welded Tubing |
| Certification | ISO, SGS, BV, EN 10204 3.1 |
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