18" 904L Stainless Steel Square Pipe
18" 904L Stainless Steel Square Pipe
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Product Overview
Premium 904L stainless steel square pipe delivers unmatched corrosion resistance, durability, and performance in extreme environments. Engineered for longevity and reliability, this high-alloy austenitic stainless steel product is a top choice for chemical, marine, and offshore industries where conventional steel grades fail. With its high nickel and molybdenum content, 904L excels in resisting strong acids, seawater exposure, and chloride-induced stress cracking.
If your project demands a strong, non-magnetic, low-maintenance square pipe that holds up against some of the most aggressive conditions known to industry, 904L stainless steel square pipe is the optimal choice. This premium material is widely used in storage tanks, condenser tubing, desalination plants, and structural frames for chemical processing units.
Key Specifications
| Category | Details |
|---|---|
| Material Type | 904L Austenitic Stainless Steel |
| Standard | ASTM A312, ASTM A269, EN 1.4539 |
| Surface Finish | Annealed, Pickled, or Polished |
| Hardness (HV) | 170–220 (Annealed State) |
| Magnetism | Non-Magnetic |
Available Sizes & Weight
| Size (Inches) | Wall Thickness | Length | Weight (per foot) |
|---|---|---|---|
| 1" x 1" | 0.065" – 0.188" | 20ft | 0.85 – 2.5 lbs (Stainless steel square pipe weight) |
| 2" x 2" | 0.120" – 0.250" | 20ft | 3.2 – 6.0 lbs |
| Custom | 0.065" – 0.375" | 10ft–40ft | Contact for exact weight |
(Note: Stainless steel square pipe weight varies by size, wall thickness, and density. Custom stainless steel pipe square options are available for large-scale projects.)
Key Properties
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Corrosion Resistance: Offers superior protection in environments containing sulfuric acid, hydrochloric acid, and chloride ions. Ideal for chemical tanks, piping systems, and seawater equipment.
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Strength & Durability: High tensile strength and pressure-bearing capacity ensure the pipe withstands mechanical stress in industrial systems.
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Weldability: Exceptional weldability allows for efficient fabrication with minimal post-weld treatments required.
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Low Maintenance: Resists pitting, crevice corrosion, and intergranular attack. This reduces maintenance cycles and downtime in critical systems.
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Aesthetic Surface: Smooth polished finishes not only improve appearance but also reduce the adhesion of impurities and contaminants.
Manufacturing Process
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Forming: The pipe is formed using advanced cold-drawing or TIG-welding techniques to achieve tight tolerances and clean square profiles. Cold forming increases strength while maintaining good ductility.
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Heat Treatment: The material is solution-annealed at controlled temperatures to enhance corrosion resistance and mechanical uniformity across the pipe’s structure.
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Finishing: Depending on end-use, the pipe can be finished via pickling to remove impurities or passivated for added protection. Mirror polishing is also available for decorative or hygienic applications.
Why Choose 904L?
✅ Best material for harsh conditions: The high nickel (23–28%) and molybdenum content makes 904L stainless steel square pipe one of the most corrosion-resistant grades on the market. It’s often used as an upgrade from 316L and other stainless steels in aggressive conditions.
✅ Lightweight design with strength: While 904L has higher alloy content, it still provides a favorable strength-to-weight ratio. This means lower stainless steel square pipe weight for the same performance level compared to other high-performance alloys.
✅ Custom sizing: From 1” x 1” to custom large-profile square sections, we provide tailor-made stainless steel pipe square configurations to fit your application exactly.
✅ Certified quality: All products comply with ASTM A312/A269 and EN 1.4539 standards, ensuring global compatibility. Mill Test Certificates (MTCs) and additional compliance documentation (ISO, PED, TUV) available on request.
✅ Sustainable choice: 904L is fully recyclable and contains no harmful substances, making it ideal for environmentally responsible applications in water treatment and green energy sectors.
Applications of 904L Stainless Steel Square Pipe
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Chemical Processing: Transfer lines and tank supports for acid production and storage systems.
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Marine & Offshore: Structural pipework for shipbuilding, platforms, and underwater piping.
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Oil & Gas: Piping networks in harsh oilfield environments or refineries exposed to chlorides.
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Desalination Plants: Brine contact piping that demands both corrosion and structural integrity.
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Pulp & Paper Mills: Corrosion-resistant conduits in bleach plants and process streams.
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Architecture & Design: Decorative stainless steel pipe square structures requiring strength and modern finish.
