Nitronic 50 Forgings

Metracore Alloys manufactures and supplies Nitronic 50 forgings (UNS S20910) for applications where components must resist both pitting corrosion and galling under demanding service conditions. Nitronic 50 is a nitrogen-strengthened austenitic stainless steel that combines high mechanical strength with excellent corrosion resistance. Forged with precise dimensional control and consistent material properties, these forgings are widely used for marine propeller shafts, pump shafts, valve components, and other critical equipment operating in corrosive environments. Forgings in the grade hold superior mechanical properties over conventional stainless steels while keeping resistance to pitting, crevice corrosion, and galling intact. High-pressure marine and industrial service depends on them where durability decides the specification. This page covers the case for the grade, specifications, product range, chemical composition, mechanical properties, features and benefits, industrial applications, inspection and quality standards, advantages, reasons to buy from us, and FAQs. Share your drawing or size list, and we’ll quote promptly.

Why Choose Nitronic 50 Forgings?

Hot working is where the grade’s advantage begins. Forging works the nitrogen-strengthened austenitic matrix at controlled temperatures, refining grain and closing internal voids. Interstitial nitrogen then does the structural work: it stiffens the lattice so effectively that forgings reach nearly double the annealed yield strength of 304 and 316. Corrosion resistance doesn’t drop as strength climbs, since chromium and molybdenum act with the nitrogen against chloride pitting. Galling resistance adds a further reason to specify it: threaded joints and valve trim resist seizure. Weldability stays good too, using standard austenitic filler practice with no mandatory post-weld heat treatment. A single forged alloy covers all of those demands in rotating-equipment duty. Nitronic 50 isn’t needed for mild atmospheric exposure; 316 serves it at a lower cost.

Why Choose Metracore Alloys?

Metracore Alloys manufactures and supplies premium Nitronic stainless steel forgings using advanced forging and machining facilities that operate to international standards. Custom forgings follow customer drawings at these works, with each order managed end to end. Third-party inspection is available on request. Every order ships with a Mill Test Certificate to EN 10204 3.1, backed by strict quality assurance. Export-grade packaging protects machined surfaces, and reliable worldwide delivery runs through our distribution network. Send your drawing and test requirements for a Nitronic® 50 Forgings quotation.

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Table of Content

Nitronic 50 Forgings: Specifications

The table below summarises our supply scope for UNS S20910 Forgings, from grade identity through heat treatment and certification.

Types of Nitronic 50 Forgings

Our range covers 7 forged product families in Nitronic 50: rings, shafts, discs, blocks, bushings, open-die forgings and fully custom components.

Reach out to Metracore Alloys for reliable Nitronic 50 Forgings solutions.

Technical Details of Nitronic 50 Forgings

Chemical Composition

Three elements carry most of Nitronic 50’s strength and pitting resistance: nitrogen, chromium, and molybdenum. The ASTM specification fixes the full analysis.

Element

Chromium (Cr)

Nickel (Ni)

Manganese (Mn)

Nitrogen (N)

Molybdenum (Mo)

Silicon (Si)

Carbon (C)

Phosphorus (P)

Sulphur (S)

Iron (Fe)

Niobium (Nb)

Vanadium (V)

Content (%)

20.5 – 23.5

11.5 – 13.5

4.0 – 6.0

0.20 – 0.40

1.50 – 3.00

1.00 max

0.06 max

0.040 max

0.030 max

Balance

0.10 – 0.30

Mechanical Properties

Minimum values below apply to annealed XM-19 Forgings under ASTM A182 and ASTM A473, with hot-worked material reaching higher strength on request.

Property	Tensile Strength	Yield Strength	Elongation	Hardness	Density	Impact Strength
Value (Annealed Condition)	690 MPa (100 ksi) min	380 MPa (55 ksi) min	35% min	Approx. 95 HRB (typical)	7.88 g/cm³	High Charpy V-notch toughness, retained down to -196°C

Features & Benefits

Eight working characteristics justify the price premium over standard austenitic grades.

Strength arrives without a corrosion trade-off, letting sections shrink while wetted surfaces keep full pitting resistance.
Pitting and crevice corrosion stay controlled in chloride media because molybdenum and nitrogen lift the localised attack threshold.
Galling resistance protects threaded and sliding contacts through repeated assembly.
Toughness holds from cryogenic cold to elevated heat, protecting against brittle fracture in marine service.
Fatigue strength supports shafts under alternating bending loads.
Fabrication follows familiar austenitic practice, with no exotic welding procedures.
Service life stretches well beyond conventional stainless parts in the same duty, cutting replacement frequency.
Maintenance budgets fall as seizures and premature replacement become infrequent.

Inspection & Quality Standards

Every consignment is tested against the governing ASTM and EN documents before dispatch. Production and testing follow ASTM A182 XM-19 for forged pressure components, ASTM A473 for stainless steel forgings, ASTM A276 and ASTM A479 for bar-derived machined parts, and ASTM A484 for general delivery requirements. Certification to EN 10204 3.1 accompanies each order.

The inspection regime spans six checks during production and final release:

PMI testing to confirm alloy identity
Ultrasonic Testing (UT) for internal soundness through the heaviest forged sections
Mechanical testing covering strength and impact values
Ferrite testing to verify a fully austenitic structure in the finished forging
Dimensional inspection against the drawing
Visual inspection of surface finish and general forging condition

Advantages of Nitronic 50 Forgings

Six advantages stand out once whole-life cost drives the comparison.

Higher strength than 304 and 316 stainless steel, at nearly double their annealed yield
Excellent corrosion resistance in chloride environments, including full seawater immersion
Outstanding wear and galling resistance
Long operating life under continuous seawater immersion and sustained rotating load
Reduced downtime and maintenance because galling seizures and pitting repairs become rare
Cost-effective choice once replacement cycles are priced in

Manufacturing Process of Nitronic 50 Forgings

Nitronic 50 Forgings Industrial Applications

Nitronic 50 forgings appear across 6 industry groups where strength and corrosion performance must coexist.

Exporter, Manufacturer & Supplier of Nitronic 50 Forgings in various grades, sizes, shapes and specifications.

FAQs

What are Nitronic 50 forgings?

Nitronic 50 forgings are forged components made from UNS S20910, a nitrogen-strengthened austenitic grade combining high strength with corrosion and galling resistance.

Is Nitronic 50 the same as XM-19 stainless steel?

Yes. XM-19 is the ASTM designation for UNS S20910; both names describe one alloy.

Which standards are followed for Nitronic 50 forgings?

ASTM A182 XM-19, ASTM A473, ASTM A276, ASTM A479 and ASTM A484 govern the material, with EN 10204 3.1 certification providing traceability.

What types of Nitronic 50 forgings do you manufacture?

Rings, discs, shafts, blocks and bushings form the standard range. Open die and custom work are arranged according to drawings.

Are Nitronic 50 forgings suitable for marine applications?

They’re well suited to marine duty. Seawater pitting and crevice resistance exceed 304 and 316, with naval-friendly low magnetic permeability.

Which industries commonly use Nitronic 50 forgings?

Marine, offshore, oil and gas, chemical processing, power generation, and pump manufacturing account for most demand.

Can you manufacture custom Nitronic 50 forgings as per customer drawings?

We can arrange these to your drawings through our manufacturing partners.

Do you provide mill test certificates and third-party inspection?

Every order includes an EN 10204 3.1 Mill Test Certificate, and third-party inspection can be organised at the source works.