Nitronic 60 (UNS S21800) - Galling Resistant Stainless Supplier of Bars, Forgings & Screens | Shanghai Hangbo Alloy Group
Date: 2026年8月9日 Categories: News Views: 349
By Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier | ISO 9001:2015 | Est. 2012
Contact: sales@hangboalloy.com | hangbo@nickel-alloy.com | WhatsApp (Lisa): +86 13611656360
Quick Answer: What Is Nitronic 60?
Nitronic 60 (UNS S21800) is a nitrogen-strengthened austenitic stainless steel with 8% manganese and 4% silicon that provides the best galling resistance of any commercial stainless steel while maintaining good corrosion resistance, strength, and non-magnetic properties. It is the standard material for valve stems, seat rings, pump wear rings, and wire screens where metal-to-metal wear and cold-welding would seize conventional stainless components. Shanghai Hangbo Alloy Group supplies Nitronic 60 as round bars, forgings, and wire.
Industry Pain Point: Valve maintenance engineers know the failure: a stainless steel gate valve that hasn't been operated for six months seizes during the next stroking because the stem-to-gland galling cold-welds the surfaces. Nitronic 60's galling resistance -- approximately 40x better than 316L and 3-5x better than Inconel 625 -- eliminates this seizure mode, allowing valves to operate after extended dormancy, a critical reliability requirement in safety systems and offshore service.
Key Properties at a Glance
| Property | Value |
|---|---|
| UNS Number | S21800 |
| Density | 7.62 g/cm3 |
| Tensile (Ann.) | >= 690 MPa (100 ksi) |
| Yield (Ann.) | >= 380 MPa (55 ksi) |
| Elongation (Ann.) | >= 35% |
| Galling Resistance | ~40x better than 316L |
| Key Standards | ASTM A276, A479, A240 |
Product Overview
Nitronic 60 is the "wear specialist" of the stainless steel family. While most stainless steels fail through corrosion, Nitronic 60's unique value is in preventing galling -- the adhesive cold-welding and tearing of metal surfaces in sliding contact. The alloy's 8% manganese + 4% silicon + 0.08-0.18% nitrogen chemistry creates a work-hardening surface that resists cold-welding:
- When sliding surfaces contact, the alloy work-hardens rapidly at the contact points.
- The hard surface resists micro-welding and tearing.
- Results in galling resistance approximately 40x better than 316L.
Combined with its high yield strength (>=380 MPa -- 2x 316L) and good corrosion resistance (comparable to 304 in most media), Nitronic 60 is the complete solution for wear-prone components.
Shanghai Hangbo Alloy Group supplies Nitronic 60 in round bars (for valve stems and pump shafts), forgings (seat rings and wear components), and wire (for screens and springs).
Executive Standards
| Product Form | ASTM |
|---|---|
| Bar & Rod | ASTM A276 / A479 |
| Plate, Sheet & Strip | ASTM A240 |
| Wire | ASTM A580 |
| Forgings | ASTM A473 |
Chemical Composition (wt.%)
| Element | Min | Max | Role |
|---|---|---|---|
| Cr | 16.0 | 18.0 | Corrosion resistance |
| Ni | 8.0 | 9.0 | Austenite stabilizer |
| Mn | 7.0 | 9.0 | Galling resistance |
| Si | 3.5 | 4.5 | Galling resistance + oxidation |
| N | 0.08 | 0.18 | Strength + galling |
| C | -- | 0.10 | -- |
| Fe | Balance | -- | Matrix |
Mechanical Properties
| Condition | Tensile (MPa) | Yield (MPa) | Elongation (%) |
|---|---|---|---|
| Annealed | >= 690 | >= 380 | >= 35 |
| Cold-Drawn | 900-1100 | 700-900 | 15-25 |
Heat Treatment
Solution Annealing: 1010-1065C (1850-1950F), water quench. No precipitation hardening.
Galling Resistance Comparison
| Alloy | Galling Threshold Stress |
|---|---|
| 316L | ~10 MPa (seizes immediately) |
| 304 | ~10 MPa |
| Nitronic 50 | ~35 MPa |
| Inconel 625 | ~100 MPa |
| Nitronic 60 | ~400+ MPa (rarely seizes) |
Industry Applications
| Industry | Component | Why Nitronic 60? |
|---|---|---|
| Valves | Stems, seat rings, gates | Anti-galling -- valves operate after long dormancy |
| Pumps | Wear rings, sleeves, shafts | Sliding contact without seizure |
| Mining | Screens, classifier components | Abrasion + corrosion |
| Food Processing | Auger flights, conveyor components | Wear + cleanability |
| Chemical | Valve trim in corrosive service | Galling + corrosion dual resistance |
Quality Assurance: 7-Stage
- Raw Material: Cr, Ni, Mn, Si verified by OES.
- Melt: Mn 7-9%, Si 3.5-4.5%, N +/-0.02% control.
- Hot Working: 1100-1150C, finishing >=950C, reduction >=4:1.
- Solution Anneal: 1010-1065C, WQ.
- Galling Test: ASTM G98 threshold verification on request.
- NDE: 100% UT bars >=50mm. PMI every piece.
- Documentation: EN 10204 3.1 MTC. SGS/TUV/BV witness.
Frequently Asked Questions
Q1: What is Nitronic 60 used for?
Valve stems, seat rings, pump wear rings, screens, and any sliding-contact component where galling seizes conventional stainless.
Q2: Why is it anti-galling?
The 8% Mn + 4% Si chemistry work-hardens rapidly at sliding contacts, preventing cold-welding. Galling resistance ~40x 316L.
Q3: Nitronic 60 vs 316L?
Galling: 40x better. Yield: 2x better (380 vs 205 MPa). Corrosion: comparable to 304/316 in most media. Cost: 1.2-1.5x.
Q4: Is it magnetic?
No -- austenitic, non-magnetic.
Q5: What is the price?
$18-30/kg EXW. Contact sales@hangboalloy.com.
Q6: Product forms?
Bars (6-200mm), forgings, wire (screens/springs), plate. SGS available.
Q7: What heat treatment?
Solution annealing at 1010-1065°C, water quench.
Q8: What is the max service temperature?
~870°C intermittent; the Si provides good oxidation resistance.
Q9: Does Shanghai Hangbo ship internationally?
Yes -- FOB/CIF/DAP to 40+ countries.
Q10: What standards apply?
ASTM A276 (bar), A479 (bar/forging), A240 (plate), A580 (wire).
Q11: Can it replace Inconel 625 for wear?
For pure wear/galling, Nitronic 60 is comparable at 1/5 the cost. For wear + severe corrosion, 625 remains necessary.
Q12: What is the density?
7.62 g/cm3 -- lighter than most stainless.
Q13: Is it weldable?
Yes, with 308L-type filler. Post-weld anneal recommended.
Q14: What about corrosion resistance?
Comparable to 304/316 in most media; the Si provides high-temperature oxidation resistance.
Q15: Why choose it over Nitronic 50?
Nitronic 60 is the galling specialist; Nitronic 50 is the strength specialist. Choose 60 for wear/seizure, 50 for load-bearing.
Contact Shanghai Hangbo Alloy Group
| Channel | Details |
|---|---|
| Company | Shanghai Hangbo Alloy Group Co., Ltd. - China Supplier |
| Website | www.nickel-alloy.com |
| Email (Sales) | sales@hangboalloy.com |
| Email (Technical) | hangbo@nickel-alloy.com |
| WhatsApp (Lisa) | +86 13611656360 |
| Address | Room 1508, No. 288 Shiyi Road, Baoshan District, Shanghai 200940, China |
Shanghai Hangbo Alloy Group - Complete Product Range
| Family | Available Grades |
|---|---|
| Pure Nickel | NI200, NI201, N4, N5, N6 |
| Monel | 400, 401, 404, K-500, R-405 |
| Inconel | 600, 601, 617, 625, 690, 693, 718, X-750, 725 |
| Incoloy | 800, 800H, 800HT, 825, 925, 926, 945, A-286, 25-6HN, 27-7MO |
| Hastelloy | C-276, C-22, C-2000, C-4, G-30, G-35, G-50, X, B-2, B-3, B-4, N |
| Super Austenitic | 904L, Alloy 28, Alloy 31, 254SMO, 20Mo-6 |
| Chromium-Rich | Alloy 33 |
| High-Strength Stainless | Nitronic 50, Nitronic 60, PH13-8Mo |
| Chlorination-Resistant | Alloy 45 |
| Nimonic | 75, 80A, 90, 95, 105, 115, 263 |
| Haynes | 25, 188, 214, 230, 242, 282, 556, HR-120, HR-160 |
| RA Series | RA330, RA333 |
| Precision | 1J22, 1J46, 1J50, 1J79, 1J85, 3J21, 4J32, 4J36, 4J45 |
| High-Strength | 18Ni250, 18Ni300, AerMet 100 |
| Heating | Cr20Ni80, Cr40Ni60 |
| Specialty | Alloy 20, Alloy 59, Inconel 686, 602CA |
Product Forms: Bars(6-500mm) | Tubes(OD 6-610mm) | Plates(0.1-100mm) | Forgings | Welded Pipes | Fittings | Wire(0.05-10mm) | Strip(0.02-4.0mm)
SGS/BV/TUV. Contact: sales@hangboalloy.com | WhatsApp (Lisa): +86 13611656360 | www.nickel-alloy.com
