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Stainless Steel 904L Pipe Fittings – Manufacturer, Supplier & Exporter in Mumbai, India

Stainless Steel 904L Pipe Fittings – Manufacturer, Supplier & Exporter in Mumbai, India

Virami Steel Hub is a trusted manufacturer, supplier, stockist, and exporter of premium-quality Stainless Steel 904L Pipe Fittings in Mumbai, India. We supply high-performance stainless steel fittings designed to provide exceptional corrosion resistance, superior strength, and long service life in highly aggressive industrial environments.

Our SS 904L pipe fittings are manufactured using high-grade stainless steel alloys and advanced production technologies to ensure accurate dimensions, excellent mechanical properties, and consistent product quality. These fittings are widely used in industries where extreme corrosion resistance and durability are required.

With a strong distribution network and efficient logistics system, Virami Steel Hub supplies Stainless Steel 904L pipe fittings across India and exports globally to the USA, Europe, the Middle East, Africa, and Southeast Asia. Our products comply with international standards and deliver reliable performance in demanding industrial applications.

Stainless Steel 321 Pipe Fittings

What are Stainless Steel 904L Pipe Fittings?

Stainless Steel 904L Pipe Fittings are piping components used to connect pipes, change the direction of flow, and control fluid movement in industrial piping systems. These fittings are manufactured from Grade 904L stainless steel, a high-alloy austenitic stainless steel known for its exceptional resistance to corrosion, especially in acidic environments.

SS 904L contains high levels of chromium, nickel, molybdenum, and copper, which significantly improve resistance to pitting, crevice corrosion, and sulfuric acid corrosion.

These pipe fittings are commonly used in:

  • Chemical processing plants
  • Oil and gas industries
  • Pharmaceutical industries
  • Marine environments
  • Petrochemical plants
  • Pollution control systems

Because of their excellent corrosion resistance, SS 904L pipe fittings are ideal for applications exposed to harsh chemicals and aggressive environments.


Key Features of Stainless Steel 904L Pipe Fittings

Stainless Steel 904L pipe fittings offer several advantages for industrial applications.

  • Exceptional corrosion resistance
  • High resistance to sulfuric acid and phosphoric acid
  • Excellent resistance to pitting and crevice corrosion
  • Superior resistance to chloride environments
  • High durability and strength
  • Excellent weldability and fabrication properties
  • Long service life in aggressive environments
  • Reliable performance in chemical processing systems

These features make SS 904L fittings suitable for highly corrosive industrial environments.


Chemical Composition of Stainless Steel 904L Pipe Fittings (%)

The typical chemical composition of Stainless Steel 904L includes:

  • Chromium (Cr): 19 – 23%
  • Nickel (Ni): 23 – 28%
  • Molybdenum (Mo): 4 – 5%
  • Copper (Cu): 1 – 2%
  • Carbon (C): 0.02% maximum
  • Manganese (Mn): 2% maximum
  • Silicon (Si): 1% maximum
  • Phosphorus (P): 0.045% maximum
  • Sulfur (S): 0.035% maximum
  • Iron (Fe): Balance

Role of Key Alloying Elements

  • Chromium (Cr): Chromium enhances corrosion resistance and protects the alloy from oxidation.
  • Nickel (Ni): Nickel improves ductility, strength, and resistance to corrosive chemicals.
  • Molybdenum (Mo):Molybdenum provides resistance to pitting and crevice corrosion, particularly in chloride environments.
  • Copper (Cu):Copper improves resistance to strong reducing acids such as sulfuric acid.The combination of these elements provides excellent corrosion resistance and durability in harsh industrial conditions.

Mechanical Properties of Stainless Steel 904L Pipe Fittings

Stainless Steel 904L pipe fittings offer strong mechanical properties suitable for demanding industrial environments.

  • Tensile Strength: 490 – 690 MPa
  • Yield Strength: Minimum 220 MPa
  • Elongation: Minimum 35%
  • Hardness: Up to 200 HB
  • Density: 8.0 g/cm³

These properties ensure reliable performance and durability in industrial piping systems.

Physical Properties

Stainless Steel 904L pipe fittings possess stable physical properties suitable for corrosive environments.

  • Melting Range: 1300 – 1390°C
  • Modulus of Elasticity: 195 GPa
  • Thermal Conductivity: 11.5 W/m·K
  • Electrical Resistivity: 0.95 µΩ·m
  • Coefficient of Thermal Expansion: 15.8 µm/m°C

These properties contribute to structural stability and long-term performance.

Corrosion Resistance

One of the most important advantages of Stainless Steel 904L pipe fittings is their exceptional resistance to corrosion in highly aggressive environments.

They provide resistance to:

  • Sulfuric acid environments
  • Phosphoric acid processing
  • Chloride environments
  • Pitting corrosion
  • Crevice corrosion
  • Industrial chemical exposure

Due to this corrosion resistance, SS 904L fittings are widely used in chemical plants, offshore facilities, and pollution control equipment.

Heat Treatment

Stainless Steel 904L pipe fittings are typically supplied in the solution annealed condition.

Annealing Process

  • Temperature Range:1090 – 1175°C
  • Followed by rapid cooling

This process restores corrosion resistance and improves mechanical properties.

Weldability

Stainless Steel 904L pipe fittings offer good weldability and can be welded using standard welding techniques.

Common welding processes include:

  • TIG Welding (GTAW)
  • MIG Welding (GMAW)
  • Shielded Metal Arc Welding (SMAW)

Welding Recommendations

  • Ensure welding surfaces are clean
  • Use compatible filler materials
  • Maintain controlled heat input
  • Avoid contamination during welding

These practices help produce strong weld joints with excellent corrosion resistance.

Machinability

Stainless Steel 904L has moderate machinability due to its high alloy content.

Recommended machining practices include:

  • Use carbide cutting tools
  • Maintain moderate cutting speeds
  • Apply sufficient coolant
  • Avoid excessive heat buildup

These techniques improve machining efficiency and surface quality.

Standards & Specifications

Virami Steel Hub supplies Stainless Steel 904L pipe fittings according to internationally recognized standards.

  • ASTM A403 WP904L
  • ASME SA403
  • ANSI B16.9
  • ASTM A182 F904L
  • ASTM A276

Available Types of Stainless Steel 904L Pipe Fittings

We supply a complete range of SS 904L pipe fittings including:

  • 45° and 90° Elbows
  • Equal and Reducing Tees
  • Concentric and Eccentric Reducers
  • Pipe Caps
  • Stub Ends
  • Cross Fittings
  • Couplings

Available Sizes

We supply a complete range of SS 321 pipe fittings including:

  • Size Range: ½ inch to 48 inches
  • Thickness: SCH 10, SCH 20, SCH 40, SCH 80, SCH 160
  • Available: Seamless and welded fittings

Surface Finish

  • Pickled finish
  • Polished finish
  • Matte finish

Custom sizes and specifications are available based on industrial requirements.

Applications of Stainless Steel 904L Pipe Fittings

Stainless Steel 904L pipe fittings are widely used across several industries.

Chemical Processing Industry

  • Acid handling equipment
  • Chemical reactors
  • Industrial pipelines

Oil & Gas Industry

  • Offshore platforms
  • Petrochemical plants

Marine Industry

  • Seawater systems
  • Offshore structures

Pharmaceutical Industry

  • Sterile manufacturing systems
  • Processing equipment

Pollution Control Industry

  • Flue gas desulfurization systems
  • Wastewater treatment equipment

Quality Testing & Inspection

At Virami Steel Hub, every batch of Stainless Steel 904L pipe fittings undergoes strict quality inspection procedures.

Quality checks include:

  • Chemical composition analysis
  • Mechanical testing
  • Dimensional inspection
  • Surface quality inspection
  • Positive Material Identification (PMI)

We provide Mill Test Certificates (MTC) and offer third-party inspection services upon request.

Packaging & Delivery

Virami Steel Hub ensures safe packaging and efficient delivery.

  • Export-grade wooden boxes or pallets
  • Protective wrapping to prevent damage
  • Proper labeling and product traceability
  • Secure domestic and international shipping

Our logistics network ensures safe transportation and timely global delivery.

Why Choose Virami Steel Hub?

  • Leading Stainless Steel Pipe Fittings manufacturer in Mumbai
  • Large ready stock availability
  • Competitive industrial pricing
  • Custom manufacturing solutions
  • Compliance with international quality standards
  • Strong global export network
  • Reliable customer support

Conclusion

Stainless Steel 904L Pipe Fittings are widely used in industrial piping systems due to their exceptional corrosion resistance, high strength, and durability in aggressive chemical environments.

They are ideal for industries such as chemical processing, petrochemical plants, marine engineering, and pollution control systems.

Virami Steel Hub supplies high-quality Stainless Steel 904L pipe fittings manufactured according to international standards, ensuring superior performance and long service life in demanding industrial applications.

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