ThePipingMart Blog Grades Nitronic 60 (UNS S21800) – Composition, Properties and Uses

Nitronic 60 (UNS S21800) – Composition, Properties and Uses

Nitronic 60

Nitronic 60 is a highly versatile austenitic superalloy with exceptional mechanical and physical properties. It is a nitrogen and manganese-enriched stainless steel, which makes it resistant to corrosion, wear, and galling. Nitronic 60 has various industrial applications, including automotive, aerospace, marine, and chemical industries. This blog post will discuss the composition, mechanical and physical properties, uses, corrosion resistance, heat treatment, machining, and welding of Nitronic 60.

Nitronic 60 Composition

Nitronic 60 is an austenitic superalloy that contains 8% to 9% manganese, 7% to 9% nickel, 16% to 18% chromium, and 0.10% to 0.16% nitrogen. Its manganese content increases its strength and hardness, while its high chromium content enhances its resistance to corrosion. On the other hand, Nitronic 60’s nitrogen content improves its wear and galling resistance, making it an ideal material for high-stress applications.

Element Content (%)
Chromium, Cr 20.5-23.5
Nickel, Ni 11.5-13.5
Manganese, Mn 4-6
Molybdenum, Mo 1.5-3
Silicon, Si 1
Nitrogen, N 0.2-0.4
Niobium, Nb 0.1-0.3
Vanadium, V 0.1-0.3
Carbon, C 0.06
Sulfur, S 0.03
Iron, Fe Balance

Nitronic 60 Mechanical Properties

Nitronic 60 offers excellent mechanical properties, including high yield strength, ultimate tensile strength, and elongation. Its yield strength ranges from 240 to 590 MPa, while its maximum tensile strength ranges from 690 to 860 MPa. Nitronic 60’s extension ranges from 25% to 65%, which makes it ductile and flexible. With its high mechanical properties, Nitronic 60 is highly suitable for fasteners, pins, bushings, and valves.

Properties Metric Imperial
Tensile strength at break ≥ 689 MPa ≥ 100000 psi
Yield strength ≥ 379 MPa ≥ 55000 psi
Elongation at break ≥ 35% ≥ 35%

Nitronic 60 Physical Properties

Nitronic 60 has excellent physical properties such as high-temperature strength, thermal expansion, and conductivity. It can withstand temperatures up to 1000 degrees Celsius, making it useful in high-temperature processing applications. Nitronic 60 also has a lower thermal expansion coefficient than austenitic stainless steel, making it more dimensionally stable. Moreover, Nitronic 60 has a high thermal conductivity, which makes it useful in heat exchanger applications.

Properties Metric Imperial
Density 7.89 g/cm3 0.285 lb/in3

Thermal Properties

Properties Metric Imperial
Thermal expansion co-efficient (@25.6-93.3°C/78-200°F) 16.2 µm/m°C 9 µin/in°F

Nitronic 60 Equivalent

Other designations that are equivalent to nitronic 60 alloy include the following:

ASTM A182 (XM-19) ASTM A269 (XM-19) ASTM A412 (XM-19)
ASTM A193 (B8R, B8RA) ASTM A276 ASTM A479 (XM-19)
ASTM A194 (B8R, B8RA) ASTM A312 (XM-19) ASTM A580 (XM-19)
ASTM A240 (XM-19) ASTM A336 (XM-19) ASTM A813 (TP XM-19)
ASTM A249 (XM-19) ASTM A403 (XM-19) DIN 1.3964

Nitronic 60 Uses

Nitronic 60 is used in various industrial applications, including automotive, aerospace, marine, and chemical industries. Nitronic 60’s high mechanical and physical properties make it highly suitable for critical applications such as fasteners, springs, shafts, and valves. Nitronic 60’s corrosion-resistant properties make it ideal for marine and chemical industry applications such as pumps, heat exchangers, and valves.

Nitronic 60 Corrosion Resistance

Nitronic 60 has excellent corrosion resistance, making it useful in highly corrosive environments. It performs well in seawater, acids, alkalis, and organic compounds. Nitronic 60’s corrosion-resistant properties make it suitable for marine, chemical, and petrochemical applications.

Nitronic 60 Heat Treatment

Nitronic 60 can be heat treated to enhance its mechanical properties. Its hardness can be increased by ageing at a temperature of 510-580 degrees Celsius for two to four hours. Its strength can also be increased by cold working. Nitronic 60 can be annealed at 1035 to 1149 degrees Celsius for about 15 minutes to enhance its ductility.

Nitronic 60 Machining

Nitronic 60 can be easily machined using conventional machining methods such as turning, drilling, and milling. Its high work hardening rate requires adequate cutting fluids to reduce tool wear. Nitronic 60 can also be machined with carbide tools.

Nitronic 60 Welding

Nitronic 60 can be welded using conventional welding methods such as TIG or MIG welding. It requires proper preheating to prevent cracking and distortion. Nitronic 60 can also be brazed, soldered, or welded using resistance welding.

Conclusion:

Nitronic 60 is a highly versatile austenitic superalloy with exceptional mechanical and physical properties. It is widely used in various industrial applications such as automotive, aerospace, marine, and chemical industries. Its composition, mechanical and physical properties make it highly suitable for high-stress applications. Nitronic 60 is also highly resistant to corrosion, making it useful in highly corrosive environments. Its excellent heat treatment, machining, and welding properties make it highly customizable for specific industrial applications. As such, Nitronic 60 is undoubtedly a super alloy worth considering for high-performance industrial applications.

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