UNS NO32750 (F53) Pipe
Rose Metal Industries supports both domestic and international markets, offering UNS S32750 pipes to industries in Southern India — Tamil Nadu, Andhra Pradesh, Karnataka, Telangana, Puducherry, Andaman & Nicobar Islands — and globally. Customized solutions, including MTC, third-party inspection, and special packaging for export, ensure that customers receive pipes ready for industrial, marine, and offshore deployment..
Super Duplex F53 pipes provide high tensile strength (≈795–800 MPa) and yield strength (≈550 MPa), with elongation of 15% or more depending on wall thickness and processing. Hardness typically reaches up to 310 HB. These properties enable pipes to handle high internal pressures, thermal stresses, and mechanical loads, making them suitable for critical applications in chemical plants, offshore rigs, and coastal pipelines.
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The chemical makeup of F53 pipes is optimized to enhance corrosion resistance and strength. Typically, these pipes contain 24–26% Chromium, 6–8% Nickel, 3–5% Molybdenum, and 0.24–0.32% Nitrogen. Low Carbon content (≤0.03%) prevents sensitization, while balanced alloying with Manganese, Silicon, Phosphorus, and Sulfur ensures structural integrity and chemical stability in aggressive environments..
Rose Metal Industries produces UNS S32750 pipes in compliance with international standards such as ASTM A790 / ASME SA790 for seamless and welded pipes, and EN 1.4410. Pipes are available in a wide range of diameters, wall thicknesses, and lengths to meet project-specific requirements. Surface finishes include pickled, polished, bright annealed, and cold-drawn to ensure durability, aesthetics, and corrosion protection.
Specifications & Standards
| Standard / Spec | ASTM A790 / ASME SA790 (Seamless & Welded Pipes) |
|---|---|
| Grade | UNS S32750 / F53 / EN 1.4410 (Super Duplex 2507 family) |
| Pipe Type | Seamless, ERW, Welded Pipes & Tubes |
| OD Range | ≈ 6 mm up to ~250 mm OD (as standard) — larger sizes available on request. :contentReference[oaicite:7]{index=7} |
| Wall Thickness | From ~0.5 mm (thin tube) up to 50 mm (thick wall) depending on schedule. :contentReference[oaicite:8]{index=8} |
| Pipe Schedules / Thicknesses | SCH 5, SCH 10, SCH 40, SCH 80, XS/XXS, custom wall thicknesses. :contentReference[oaicite:9]{index=9} |
| Finishes & Delivery Condition | Pickled / Polished / Bright‑annealed / As‑rolled / Cold‑drawn / Welded & annealed (as per customer requirement) |
Chemical Composition (typical ranges, wt %)
| Element | S32750 (F53) |
|---|---|
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Carbon (C) | ≤ 0.03 |
| Manganese (Mn) | ≤ 1.20 |
| Silicon (Si) | ≤ 0.80 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.020 |
| Iron (Fe) | Balance |
Composition optimized for high pitting resistance equivalent number (PREn ≥ 40) for superior chloride & seawater resistance. :contentReference[oaicite:10]{index=10}
Mechanical Properties (typical)
| Property | Value (min / typical) |
|---|---|
| Yield Strength (0.2% proof) | ≈ 550 MPa |
| Tensile Strength (UTS) | ≈ 795 – 800 MPa |
| Elongation | ≥ 15% (varies with wall thickness & heat treatment) |
| Hardness | ≤ ~310 HB (solution annealed condition) |
Mechanical data consistent with international datasheets for S32750 pipes. :contentReference[oaicite:11]{index=11}
Equivalent Grades & Designations
| Standard / Code | Designation |
|---|---|
| UNS | S32750 |
| EN / DIN | 1.4410 / X2CrNiMoN25-7-4 |
| ASTM / ASME | F53 / ASTM A790 / ASME SA790 |
| Common Trade Name | Super Duplex 2507 / Super Duplex F53 |
Dimension Chart — Typical Pipe Stock Sizes
| Outside Diameter (OD) | Wall Thickness (mm) | Common Lengths / Conditions |
|---|---|---|
| 6 – 25 mm | 0.5 – 2 mm | Coiled or Straight, Pickled & Polished |
| 25 – 76 mm (1" to 3") NB approx. | 2 – 6 mm | Double random / single random / cut to length |
| 76 – 168 mm (3" to 6") NB approx. | 3 – 10 mm | Single / Double random lengths, welded or seamless |
| 168 – 250 mm (6" to ~10") NB approx. | 6 – 25 mm | Thick‑wall seamless / welded pipe, cut‑to‑order |
Custom sizes, special wall thicknesses, schedules and lengths available on request. Rose Metal Industries supports special orders and export‑ready packaging.
Applications
- Oil & Gas — pipelines, subsea risers, flow lines, topside and subsea infrastructure
- Petrochemical & chemical processing plants — acid / chloride / brine systems, scrubbers, tanks, reactors
- Marine & Offshore engineering — seawater pipelines, scrubber systems, seawater cooling, desalination plants in coastal regions (Tamil Nadu, Andhra Pradesh, Karnataka, Puducherry, Andaman & Nicobar, etc.)
- Desalination plants, seawater treatment, boiler feed water & seawater cooling systems
- Heat exchangers, condensers, pressure vessels in power, desalination and chemical plants
- Pulp & paper, fertilizer, mining and industrial plants requiring corrosion-resistant and high-pressure piping
F53 pipes are ideal for harsh chemical, marine, and offshore environments due to their excellent resistance to chloride-containing solutions, seawater, and aggressive industrial chemicals. They are extensively used in oil and gas pipelines, chemical processing plants, desalination facilities, and marine engineering projects. The high mechanical strength and corrosion resistance make these pipes suitable for high-pressure and high-temperature applications, offering reliability in demanding coastal and industrial locations..
UNS S32750, also known as Super Duplex F53, is a premium grade stainless steel pipe widely used in industries requiring exceptional corrosion resistance and high strength. The alloy features a dual-phase microstructure of austenite and ferrite, which provides superior mechanical properties and enhanced resistance to pitting, crevice corrosion, and stress corrosion cracking. Rose Metal Industries manufactures, stocks, and exports F53 pipes, serving both domestic clients in Tamil Nadu, Andhra Pradesh, Karnataka, Telangana, Puducherry, Andaman & Nicobar Islands and international markets..
Frequently Asked Questions (FAQ)
Q1: What makes UNS S32750 (F53) pipes different from standard stainless steel pipes?
A: UNS S32750 (F53) is a super duplex stainless steel with a dual-phase microstructure, offering higher strength, excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking, making it ideal for marine, offshore, and chemical applications.
Q2: Do you provide mill test certificates (MTC) for S32750 pipes?
A: Yes — Rose Metal Industries provides full MTCs and can arrange third-party inspection, PMI, or chemical composition analysis upon request for quality verification.
Q3: Which standards do your UNS S32750 pipes comply with?
A: Our pipes comply with ASTM A790 / ASME SA790 standards for seamless and welded pipes. We also supply material according to EN 1.4410 and customer-specified international standards.
Q4: Can you supply custom diameters, wall thicknesses, lengths, and surface finishes?
A: Yes — we provide custom OD, wall thickness, schedules, cut-to-length, single/double random, pickled & polished, and other finishes as per project requirements. Contact our sales team for minimum order quantities and lead times.
Q5: Are UNS S32750 pipes suitable for coastal and marine environments in India?
A: Absolutely — they are highly recommended for projects in Tamil Nadu, Andhra Pradesh, Karnataka, Telangana, Puducherry, and the Andaman & Nicobar Islands due to superior corrosion resistance in seawater, chlorides, and harsh coastal climates.