Nitronic 60 Pipe Fittings

Metracore Alloys manufactures Nitronic 60 Pipe Fittings (UNS S21800) and hardness-checks every batch before release, because surface condition decides how this alloy performs in sliding contact. Nitronic 60 is a high-performance austenitic stainless steel engineered to provide superior wear resistance and prevent galling during direct metal-to-metal contact.

Chemistry does the work. Silicon at 3.5 to 4.5% combines with 7.0 to 9.0% manganese to grow an adherent, silicon-rich oxide film across every contact face. Under load, the film shears cleanly rather than letting metal transfer between connecting parts, so threaded and flanged joints assemble and break out repeatedly, and the connection doesn’t need anti-seize paste or hardfacing.

Good corrosion resistance rides alongside that mechanical durability: chloride pitting performance approaches the 316 level, while nitrogen stiffens the austenitic matrix against deformation. Piping systems exposed to friction, abrasion, and high mechanical loads keep these fittings in service for years.

What Are Nitronic 60 Pipe Fittings?

Nitronic 60 Pipe Fittings are piping connectors produced from UNS S21800, an austenitic stainless steel built around high silicon and manganese with a nitrogen boost. Chromium ranges from 16.0 to 18.0% and nickel ranges around 8.0 to 9.0%, keeping the structure fully austenitic. Unlike standard stainless steels, its unique contact surfaces allow connected parts to slide, turn, and thread together smoothly without seizing or welding under pressure. Corrosion resistance spans process water, mild acids, and chloride-bearing streams, covering the chemistry side of most plant duty. Nitronic 60 Stainless Steel Pipe Fittings machine and form without special tooling. Welding follows standard austenitic technique; matching filler keeps wear performance across the joint. These fittings keep their size and tight seals through vibration, heat changes, and regular maintenance, ensuring reliable long-term performance.

Why Choose Metracore Alloys?

Specialisation counts when the alloy is unusual. As a specialised stainless steel fitting manufacturer, Metracore Alloys runs Nitronic grades as a core programme, so precision-engineered components come off tooling proven on this material. Non-catalogue dimensions are cut to buyer drawings. Strict quality assurance follows each order from bar stock to final gauging, outside inspectors can observe any production step, and each despatch includes Mill Test Certificate. Export-grade packing guards machined ends in transit, and deliveries reach worldwide destinations on schedule. Submit your fitting requirements today to receive a detailed quotation within one business day.

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Table of Content

Nitronic 60 Pipe Fittings Specifications

Below is the production window for UNS S21800 Pipe Fittings: grade identity, sizes, inspection coverage, and certification paperwork.

Types of Nitronic 60 Pipe Fittings

We offer ten standard configurations, including elbows, tees, reducers, stub ends, caps, crosses, and socket weld patterns. Nitronic 60 buttweld pipe fittings are our most common product, while WP-W class welded fittings are ideal for piping systems that require radiographed (X-ray) weld inspection.

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Technical Details of Nitronic 60 Pipe Fittings

Chemical Composition of Nitronic 60 Pipe Fittings

Published limits for UNS S21800 are listed as weight percentages. Silicon and manganese sit far above ordinary austenitic practice.

Element	Chromium (Cr)	Nickel (Ni)	Manganese (Mn)	Silicon (Si)	Nitrogen (N)	Carbon (C)	Sulphur (S)	Iron (Fe)
Content (wt%)	16.0 – 18.0	8.0 – 9.0	7.0 – 9.0	3.5 – 4.5	0.08 – 0.18	0.10 max	0.030 max	Balance

Mechanical Properties of Nitronic 60 Pipe Fittings

Annealed minimums from the governing bar standards apply to starting material. Every heat passes a tension test before forming starts.

Property	Tensile Strength	Yield Strength (0.2% offset)	Elongation	Hardness	Density	Modulus of Elasticity
Value	655 MPa min (95 ksi)	345 MPa min (50 ksi)	35% min	95 HRB (typical, annealed)	7.62 g/cm³	179 GPa

Key Performance Benefits

Eight service gains draw engineers to Nitronic 60 Fittings once contact wear shortens standard-grade life.

Nitronic 60 parts rubbing directly against each other can handle contact pressures over 345 MPa without seizing, whereas standard stainless steels lock up under far lower stress.
Wear rates in sliding contact stay low because the silicon-bearing oxide blocks metal pick-up.
Corrosion resistance in chloride media betters grade 304 and sits close to 316.
Impact strength holds up at cryogenic temperatures.
A 345 MPa minimum yield point carries heavy mechanical loads, roughly double the common austenitic figure.
Scaling resistance holds to roughly 980°C in intermittent service, though mechanical strength falls well before that point and prolonged exposure between 540°C and 870°C can embrittle the alloy.
Maintenance drops since anti-seize pastes and frequent thread replacement aren’t required.
Service longevity runs for years in duty that consumes leaner alloys in months.

Standards, Inspection & Testing

Fittings are manufactured to ASTM A403 practice using bar or forging stock conforming to ASTM A276 / A479 Type S21800. Because S21800 is not a listed A403 grade, supply is by agreement between buyer and manufacturer. ASTM A960 supplies the common requirements shared by both. Dimensions follow ASME B16.9 for standard buttweld patterns, ASME B16.28 where short-radius geometry applies, and MSS SP-43 applies only to lightweight Schedule 5S and 10S buttweld fittings. Heavier schedules follow ASME B16.9.

PMI verifies the alloy grade, hydrostatic checks prove each fitting holds pressure, and dimensional inspection, hardness testing, and visual examination close out every batch under EN 10204 3.1 certification.

Manufacturing Process of Nitronic 60 Pipe Fittings

Typical Industrial Applications

These fittings are used across multiple industries for the following applications.

Exporter, Manufacturer & Supplier of Nitronic 60 Pipe Fittings in various material and sizes.

FAQs

What Are Nitronic 60 Pipe Fittings?

Nitronic 60 Pipe Fittings are joint components in UNS S21800 stainless steel, chosen where sliding contact galls ordinary austenitic grades.

What Makes Nitronic 60 Different From Nitronic 50?

Nitronic 50 is the family’s strength and corrosion grade; Nitronic 60 exchanges some of both for far better galling behaviour.

Which Standards Are Followed for Nitronic 60 Pipe Fittings?

Manufacture runs to ASTM A403, ASME SA403, and ASTM A960, with ASME B16.9, ASME B16.28, and MSS SP-43 governing dimensions.

Are Nitronic 60 Pipe Fittings Suitable for High-Wear Applications?

Yes. The silicon-rich oxide limits adhesive wear, so these fittings outlast standard stainless in sliding duty.

Which Industries Commonly Use Nitronic 60 Pipe Fittings?

Pump and valve makers lead, followed by chemical, marine, mining, food, power, and paper operators.

What Types of Nitronic 60 Pipe Fittings Do You Manufacture?

Production spans right-angle and 45-degree elbows, tees in both bore layouts, two reducer geometries, socket weld types, stub ends, caps, and crosses.

Can You Supply Custom Sizes and Schedules?

Yes, special bores, off-catalogue walls, and mixed schedule requirements are produced from customer drawings alongside the regular range.

Do You Provide Third-Party Inspection and Mill Test Certificates?

Yes, inspectors chosen by the buyer may attend our tests, and an EN 10204 3.1 certificate accompanies each consignment.

Are Nitronic 60 Pipe Fittings Corrosion Resistant?

Yes, Nitronic 60 pipe fittings offer good corrosion resistance. Their overall resistance ranks between 304 and 316 stainless steel grades, with its protection against chloride pitting performing closer to the higher grade 316 level.

Do You Export Nitronic 60 Pipe Fittings Worldwide?

Yes, We ship worldwide; export cartons, freight, and customs documents are handled by our despatch team.