Introduction
Stainless Steel 17-4PH pipe fittings are widely recognized for their exceptional combination of strength, corrosion resistance, and heat treatment capabilities. These fittings are ideal for aerospace, petrochemical, marine, and high-pressure industries where reliability under stress is critical.
Mcneil Instruments is a leading manufacturer, supplier, and exporter of Stainless Steel 17-4PH pipe fittings in India. With advanced production capabilities and international certifications, we cater to clients seeking durable and high-performance stainless steel fitting solutions.
What Makes Stainless Steel 17-4PH Unique?
17-4PH (UNS S17400) is a precipitation-hardening martensitic stainless steel. It combines the corrosion resistance of stainless steel with the high strength of hardened alloys.
Key Characteristics:
- High tensile and yield strength after heat treatment (H900 to H1150)
- Excellent mechanical properties up to 600°F (316°C)
- Good corrosion resistance in marine and chemical environments
- Ideal for welding, machining, and heat treatment
Properties of 17-4PH Material
17-4PH stainless steel is a precipitation-hardening martensitic alloy, known for its high strength, excellent corrosion resistance, and good mechanical properties at elevated temperatures.
- Corrosion Resistance: Performs well in chemical, marine, and atmospheric conditions; better than many martensitic grades.
- High Strength: Can achieve tensile strength above 1300 MPa after heat treatment (e.g., H900 condition).
- Heat Treatable: Offers flexibility with heat treatments (H900–H1150) to balance hardness and toughness.
- Good Weldability: Can be welded using standard procedures, with post-weld heat treatment improving properties.
- Dimensional Stability: Minimal distortion during hardening makes it ideal for precision-engineered parts.
These properties make 17-4PH ideal for industries requiring a combination of strength, corrosion resistance, and heat resistance, such as aerospace, oil & gas, nuclear, and marine applications.
Difference Between 17-7PH and 17-4PH Stainless Steel (Comparison Table)
| Property | 17-4PH Stainless Steel | 17-7PH Stainless Steel |
| UNS Designation | S17400 | S17700 |
| Primary Alloying Elements | Chromium (17%), Nickel (4%), Copper | Chromium (17%), Nickel (7%), Aluminum |
| Heat Treatment Response | Precipitation hardenable with H900–H1150 conditions | Requires cold working before aging |
| Corrosion Resistance | Excellent, similar to 304/316 in many environments | Moderate, less than 17-4PH |
| Hardness Range (HRC) | 35–44 (depending on heat treatment) | 35–50 (depending on aging condition) |
| Formability | Good machinability and weldability | Limited; less weldable and harder to form |
| Typical Applications | Aerospace, nuclear, marine, petrochemicals | Springs, diaphragms, washers, aerospace parts |
Technical Specifications & Mechanical Properties of Stainless Steel 17-4PH Pipe Fittings
| Property | Details |
| Standard | ASTM A182 / ASME SA182 F564 |
| Grade | Stainless Steel 17-4PH (UNS S17400) |
| Form | Elbows, Tees, Reducers, Couplings, Caps |
| Heat Treatment | Solution Annealed & Aged (H900–H1150) |
| Manufacturing Method | Forged / Machined / Seamless |
| Application | Aerospace, Power, Petrochemical, Marine |
Stainless Steel 17-4PH Pipe Fittings Mechanical Properties
| Property | Value (at H900 condition) |
| Tensile Strength | ≥ 1310 MPa |
| Yield Strength | ≥ 1170 MPa |
| Elongation | ≥ 10% |
| Hardness | 38–44 HRC |
| Service Temperature | Up to 600°F (316°C) |
Dimensions & Wall Thickness Chart Stainless Steel 17-4PH Pipe Fittings
| Nominal Pipe Size (NPS) | Wall Thickness (Schedule) |
| ½″ – 24″ | SCH 10S, SCH 40S, SCH 80S |
| Fittings Standard | ASME B16.11 / B16.9 |
| Dimensional Tolerance | As per MSS-SP-43 / ANSI B16.9 |
Stainless Steel 17-4PH Pipe Fittings Certifications
| Certification | Details |
| ASTM A182 / ASME SA182 | Grade and material compliance |
| EN 10204 3.1 / 3.2 | Mill Test Certificates (MTCs) |
| ISO 9001:2015 | Quality Management System |
| NACE MR0175 | Suitable for Sour Service Environments |
| PED 2014/68/EU | European Pressure Equipment Directive Approval |
Available Sizes & Specifications Stainless Steel 17-4PH Pipe Fittings
| Form | Size Range (NPS) | Schedule |
| Elbows, Tees | ½″ to 24″ | SCH 10S to SCH 160 |
| Couplings, Caps | ½″ to 6″ | SCH 40 to SCH 160 |
| Custom Fittings | On Request | Based on Project Specs |
Global Reach of Mcneil Instruments: Stainless Steel 17-4PH Pipe Fittings
- In Saudi Arabia, Mcneil Instruments is a leading manufacturer of 17-4PH pipe fittings used in desalination and offshore drilling applications.
- In Qatar, we are a reliable exporter, supplying 17-4PH fittings for aerospace and gas processing projects.
- In Nigeria, industries benefit from our expertise as a trusted supplier, using our high-strength 17-4PH fittings in chemical processing plants.
- As a dedicated exporter in Ghana, Mcneil delivers 17-4PH stainless fittings for corrosion-prone environments in marine and mining operations.
- In Texas, Mcneil is a prominent manufacturer and supplier of 17-4PH pipe fittings, serving the oil & gas, and defense industries.
- From Chicago, we are a known exporter, delivering 17-4PH pipe fittings for industrial automation and clean energy sectors.
- In Malaysia, we serve as a dependable supplier and exporter for 17-4PH fittings used in shipbuilding and petrochemical engineering.
- In Singapore, Mcneil Instruments is recognized as a high-quality manufacturer and exporter, supporting offshore platforms and subsea equipment.
- Across Brazil, we are a trusted supplier, providing 17-4PH pipe fittings to paper mills, refinery units, and energy plants.
Conclusion
Stainless Steel 17-4PH pipe fittings offer unmatched strength and corrosion resistance, especially in harsh industrial environments. Mcneil Instruments ensures top-grade, heat-treated 17-4PH fittings tailored to global quality standards. As a manufacturer, supplier, and exporter, we deliver robust solutions for mission-critical applications.
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