Exotic Alloys Alloy 218 Fittings Overview
Zeon Exports supplies Exotic Alloy 218 (Nitronic 60, UNS S21800) fittings – elbows, tees, reducers and stub ends – a nitrogen and manganese-strengthened austenitic stainless steel with outstanding resistance to galling, wear and fretting.
Exotic Alloy 218 (Nitronic 60) Fittings connect piping runs in oil field, petrochemical and food & drug systems where galling and wear resistance matter more than raw corrosion resistance. Its elevated silicon and manganese content inhibits wear, galling and fretting even in the annealed condition, with strength roughly double that of Type 304.
- Outstanding galling resistance versus standard austenitic stainless
- Tensile ≥655 MPa, yield ≥345 MPa in the annealed condition
- EN 10204 3.1 certified, export-ready worldwide
Quick Specifications of Exotic Alloys Alloy 218 Fittings
Exotic Alloy 218 (Nitronic 60) Fittings are produced to internationally recognized specifications.
| Field | Detail |
|---|---|
| Material/Grade | Exotic Alloy 218 (Nitronic 60) |
| UNS | S21800 |
| DIN/Werkstoff Number | 1.4565 |
| Standards | ASTM A182 |
| Form | Elbows, Tees, Reducers, Stub Ends |
| Finish | Pickled & Passivated |
| Heat Treatment | Solution Annealed |
| Certification | EN 10204 3.1 |
Equivalent Grades of Alloy 218
Alloy 218 (Nitronic 60) is recognized under several international designations below.
| UNS | DIN/Werkstoff Number | Common Trade Name | ASTM/ASME Standard |
|---|---|---|---|
| S21800 | 1.4565 | Nitronic 60 / Alloy 218 | ASTM A182 |
Chemical Composition of Alloy 218
Composition per ASTM A182 for UNS S21800; exact limits can vary slightly by specification and heat.
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 9.0 |
| Manganese (Mn) | 7.0 – 9.0 |
| Silicon (Si) | 3.5 – 4.5 |
| Nitrogen (N) | 0.08 – 0.18 |
| Iron (Fe) | Balance |
Physical Properties of Exotic Alloy 218 (Nitronic 60)
Physical properties for Nitronic 60, confirmed against manufacturer data.
| Property | Value |
|---|---|
| Density | 7.62 g/cm3 |
| Magnetic Behaviour | Essentially non-magnetic |
Mechanical Properties of Exotic Alloys Alloy 218 Fittings
Minimum mechanical properties for annealed UNS S21800 per ASTM A182.
| Property | Minimum Value |
|---|---|
| Tensile Strength | 655 MPa (95 ksi) |
| Yield Strength (0.2% offset) | 345 MPa (50 ksi) |
| Elongation | 35% |
| Condition | Solution Annealed |
Corrosion Resistance of Exotic Alloy 218 (Nitronic 60)
- Exotic Alloy 218 Fittings are chosen more for wear and galling resistance than for general corrosion resistance.
- General corrosion resistance: performs between Type 304 and Type 316 stainless steel.
- Galling and wear resistance: elevated silicon and manganese give outstanding resistance to seizing in self-mated or dissimilar metal contacts.
Heat Resistance of Exotic Alloy 218 (Nitronic 60)
Exotic Alloy 218 fittings retain good mechanical properties at elevated temperatures up to roughly 982°C (1,800°F) intermittent exposure, with oxidation resistance similar to Type 309 stainless steel. Confirm exact service limits against the governing standard and application before specifying.
Key Properties of Exotic Alloys Alloy 218 Fittings
Beyond corrosion and heat performance, Nitronic 60 fittings offer these additional properties.
- Outstanding resistance to galling, wear and fretting
- Good low-temperature impact properties
- High shear strength and excellent cavitation erosion resistance
- Strength can be increased further through cold working
Benefits of Exotic Alloys Alloy 218 Fittings
Choosing Nitronic 60 fittings from Zeon Exports delivers measurable advantages for your project.
- Eliminates galling failures common with standard stainless steels
- Full MTC 3.1 documentation for project QA/QC requirements
- Multiple fitting types and end connections to match project specs
- Reliable bulk supply with consistent ready stock
- Competitive export pricing for large industrial orders
- Fast dispatch to global project sites and ports
Related Products
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Request a Quote for Exotic Alloys Alloy 218 Fittings
Ready to source Exotic Alloy 218 (Nitronic 60) Fittings? Share your fitting type, size and quantity requirements and our team will respond with a quote.
Call: +91 98205 33105
Email: info@zeonexports.com
Website: www.zeonexports.com
Address: A-7/9, Saboo Building, Ardeshir Dady Cross Lane, Cawasji Patel Tank Road, Mumbai – 400004
Frequently Asked Questions About Exotic Alloys Alloy 218 Fittings
Common questions about Exotic Alloy 218 (Nitronic 60) Fittings, answered below.
Q1: What is Exotic Alloy 218 (Nitronic 60)?
Ans. Nitronic 60 (UNS S21800) is a nitrogen and manganese-strengthened austenitic stainless steel developed for galling and wear resistance.
Q2: Which fitting types are available in Nitronic 60?
Ans. We supply elbows, tees, reducers and stub ends across standard fitting sizes.
Q3: Is Nitronic 60 resistant to galling?
Ans. Yes, elevated silicon and manganese give outstanding resistance to galling, wear and fretting.
Q4: Is Nitronic 60 magnetic?
Ans. Nitronic 60 is essentially non-magnetic, being an austenitic stainless steel.
Q5: Can Nitronic 60 be hardened by heat treatment?
Ans. No, higher strength is achieved only through cold working, not heat treatment.
Q6: What certification is provided with orders?
Ans. Every order ships with EN 10204 3.1 mill test certificates confirming grade, heat and dimensions.
Q7: Does Zeon Exports supply custom fitting sizes?
Ans. Yes, fittings are available in custom sizes and end connections on request for bulk industrial orders.
Q8: Where are Nitronic 60 fittings typically used?
Ans. They are commonly used in oil field and petrochemical piping subject to galling in self-mated or dissimilar metal contacts.
