Stainless Steel Duplex & PH Grade Tube Fittings Manufacturer, Supplier & Exporter in India – Mcneil Instruments
Mcneil Instruments is a leading manufacturer, supplier, and exporter of Stainless Steel Duplex and PH Grade Tube Fittings in India, offering precision-built components engineered for superior strength, corrosion resistance, and durability in the most demanding industrial conditions. Our Duplex 2205, Super Duplex 2507, 17-4PH, and 15-5PH Stainless Steel Tube Fittings are designed for high-pressure, high-stress, and corrosive applications across oil & gas, petrochemical, marine, power generation, and chemical processing industries.
We manufacture each grade to ASTM and ASME standards, ensuring unmatched quality, leak-proof performance, and long operational life.
Stainless Steel Duplex 2205 Tube Fittings
Mcneil Instruments offers Duplex 2205 Tube Fittings known for their excellent balance of strength and corrosion resistance. This grade features a ferritic-austenitic structure, providing twice the strength of austenitic stainless steel and exceptional resistance to stress corrosion cracking and pitting.
✅ Technical Specification
| Parameter | Specification |
| Composition | Cr 21–23% / Ni 4.5–6.5% / Mo 2.5–3.5% |
| Temperature Range | –50°C to +300°C |
| Tensile Strength | ≥ 620 MPa |
| Yield Strength | ≥ 450 MPa |
| Hardness | ≤ 290 HB |
| Standards | ASTM A182 / ASTM A789 / ASME SA182 |
Key Highlights:
- Excellent resistance to pitting and crevice corrosion
- High mechanical strength and pressure endurance
- Ideal for desalination, oil refineries, and chemical plants
Stainless Steel Super Duplex 2507 Tube Fittings
The Super Duplex 2507 Tube Fittings by Mcneil Instruments deliver superior strength, high impact toughness, and outstanding corrosion resistance in extreme environments. With elevated chromium, molybdenum, and nitrogen levels, this grade is ideal for offshore and subsea applications where chloride stress corrosion is common.
✅ Technical Specification
| Parameter | Specification |
| Composition | Cr 24–26% / Ni 6–8% / Mo 3–5% / N 0.24–0.32% |
| Temperature Range | –50°C to +300°C |
| Tensile Strength | ≥ 800 MPa |
| Yield Strength | ≥ 550 MPa |
| Hardness | ≤ 310 HB |
| Standards | ASTM A182 / ASTM A790 / ASME SA182 |
Key Highlights:
- Designed for offshore drilling, seawater handling & desalination plants
- Outstanding resistance to chloride-induced stress and fatigue
- Exceptional structural stability in high-pressure applications
Stainless Steel 17-4PH Tube Fittings
Mcneil Instruments manufactures 17-4PH Tube Fittings renowned for high strength, hardness, and corrosion resistance, achieved through precipitation hardening. These fittings perform reliably in aerospace, nuclear, and chemical processing industries, maintaining strength even at elevated temperatures.
✅ Technical Specification
| Parameter | Specification |
| Composition | Cr 15–17.5% / Ni 3–5% / Cu 3–5% / Nb + Ta ≤ 0.45% |
| Temperature Range | –29°C to +315°C |
| Tensile Strength | ≥ 1070 MPa |
| Yield Strength | ≥ 1000 MPa |
| Hardness | ≤ 440 HB |
| Standards | ASTM A564 / ASME SA564 |
Key Highlights:
- High tensile and fatigue strength
- Excellent resistance to oxidation and mild corrosive media
- Suitable for aerospace fittings, valves, and high-stress components
Stainless Steel 15-5PH Tube Fittings
Our 15-5PH Tube Fittings are developed for enhanced toughness, improved corrosion resistance, and superior mechanical properties. The controlled chemistry and refined microstructure make them ideal for critical applications in aerospace, petrochemical, and marine engineering.
✅ Technical Specification
| Parameter | Specification |
| Composition | Cr 14–15.5% / Ni 3.5–5.5% / Cu 2.5–4.5% / Nb ≤ 0.45% |
| Temperature Range | –29°C to +315°C |
| Tensile Strength | ≥ 1060 MPa |
| Yield Strength | ≥ 965 MPa |
| Hardness | ≤ 380 HB |
| Standards | ASTM A564 / ASME SA564 |
Key Highlights:
- High strength with good toughness in both base metal and welds
- Excellent corrosion resistance in marine and industrial environments
- Reliable for aerospace structures and chemical plant equipment
Why Choose Mcneil Instruments?
✔ ISO/CE certified manufacturing with strict quality control
✔ Precision-machined tube fittings for leak-proof performance
✔ Custom sizes, threads, and pressure ratings available
✔ Global export support with reliable packaging and documentation
✔ 100% traceability with MTC & third-party inspection reports
Applications Across Industries
Oil & Gas: High-pressure tubing and chemical injection systems
Marine & Offshore: Saltwater piping, desalination, and riser systems
Aerospace: Hydraulic and pneumatic tube connections
Chemical & Petrochemical: Corrosion-resistant process lines
Power Generation: Steam, condensate, and boiler tubing
Water Treatment: Chlorine-rich and acidic water systems
Contact Us
Looking for high-performance Duplex, Super Duplex, and PH Grade Stainless Steel Tube Fittings in India?
Mcneil Instruments delivers globally trusted Duplex 2205, Super Duplex 2507, 17-4PH, and 15-5PH tube fittings that meet the toughest industrial standards.
Contact us today for expert technical assistance, customized solutions, and competitive pricing for your project needs.