Products > Nitronic 50

PMI STEEL Nitronic 50 is an austenitic, nitrogen strengthened steel that has corrosion resistance superior to grade 316 and 317 stainless steels. It has very good mechanical properties at both sub-zero and elevated temperatures. The alloy is capable of retaining low magnetic permeability even after exposure to sub-zero temperatures or severe cold working conditions.

In addition, the alloy has excellent resistance to sulfide stress cracking and intergranular attack. It can be readily fabricated, and it is considerably stronger than the conventional 300 series stainless steels.

Steel Grade:

Nitronic 50 / S20910, ASTM A193 / A194 / A276 / A479

PMI STEEL Nitronic 50 Bar

Nickel Alloy Nitronic 50 / S20910

Material Characteristics

PMI Nitronic 50 (XM-19/FXM-19) S20910 is a nitrogen-enhanced austenitic stainless steel with exceptional corrosion resistance superior to 316, 616L, 317, and 317L stainless steels. Its yield strength at room temperature is nearly double that of these alloys. The steel retains its mechanical performance excellently under both high temperature and low temperature conditions. Nitronic 50 demonstrates very low magnetic permeability at -100°F (-73°C), maintaining outstanding mechanical properties even after significant cold work or exposure to low temperatures. Although Nitronic 50 achieves very low magnetic permeability in low-temperature environments, it does not reach the levels of Nitronic 33 or Nitronic 40.

Nitronic 50 showcases remarkable corrosion resistance in various industrial processes. Following annealing at 2025°F (1107°C), S20910 exhibits outstanding corrosion resistance in high chloride environments and remains corrosion-resistant in a weld-affected state. This alloy performs excellently in stress corrosion cracking and intergranular corrosion. Nitronic 50 can withstand prolonged exposure to marine atmospheric conditions, with test results indicating its corrosion resistance in static seawater environments is slightly superior to Monel 400 (UNS N04400). However, stress corrosion cracking may occur in nitrogen environments, and its cracking resistance lies between that of 304 and 316 stainless steels. This high-performance alloy is widely utilized in the oil, petrochemical, chemical, fertilizer, nuclear fuel reprocessing, pulp and paper, textile, food processing, and marine industries. Components made from this highly corrosion-resistant and high-strength NITRONICS 50 stainless steel include pumps, valves, fittings, fasteners, cables, chains, screens, and wire sheathing, as well as marine hardware such as ship components, pump shafts, heat exchangers, springs, and photographic equipment.

Key Chemical Composition

- Nickel (Ni): 11.50% - 13.5%

- Chromium (Cr): 20.5% - 23.5%

- Molybdenum (Mo): 1.5% - 3.0%

- Manganese (Mn): 4.0% - 6%

This unique alloy composition ensures excellent overall physical and chemical properties, particularly in terms of corrosion resistance and heat resistance.

Mechanical Properties

Nitronic 50 boasts impressive yield strength, tensile strength, and ductility among stainless steels:

- Yield Strength: ≥ 380 MPa

- Tensile Strength: ≥ 690 MPa

- Elongation (1” gauge length): 35%

This material retains its mechanical performance even under high-temperature conditions, making it suitable for various industrial applications.

Physical Properties

- Density: 7.8 g/cm³

- Thermal Conductivity: 210 W/mK, demonstrating good heat transfer properties

- Specific Heat Capacity: 0.11 Btu/lb-°F

- Magnetic Permeability: Low (suitable for low-temperature applications)

Key Performance Features

- Corrosion Resistance: Nitronic 50 exhibits better corrosion resistance than 316 series stainless steels and performs outstandingly in high-temperature, high-chloride, and acidic environments.

- Structural Stability: This alloy shows excellent structural stability following heat treatment, making it suitable for welding operations.

- Low Magnetic Permeability: Maintains low magnetic permeability at -100°F (-73°C), making it ideal for applications involving magnetic materials.

Functionality, Appearance, Size, Color, Material, Specifications

Nitronic 50 bars typically have a bright metallic appearance with an elegant silver luster and a smooth surface. Common specifications include:

- Diameter Range: From 5 mm to 400 mm, accommodating various application needs

- Length: Custom lengths can be tailored to customer requirements, typically ranging from 1 m to 6 m.

The material complies with ASTM A193, A194, A276, and A479 standards, ensuring its applicability in high-pressure and high-temperature environments.

Packaging Description

- Inner Packaging: High-quality moisture-resistant materials are used to protect the product from humidity during transport and storage.

- Outer Packaging: Each alloy bar is packaged in reinforced wooden crates for easy storage and transportation.

- Label Specifications: Each package is clearly labeled with product type, specifications, production batch

number, and inspection certification to ensure traceability.

Product Applications

- Oil and Chemical Industries: For the production of corrosion-resistant pumps, valves, pipes, and other components

- Marine Engineering: For structural and hardware applications in marine environments

- Food Processing: In systems and components that require compliance with hygienic standards

- Nuclear Industry: For critical components in nuclear fuel reprocessing systems

- Pulp and Paper and Textile Industries: In equipment that requires corrosion and high-temperature resistance

Best-Selling Specifications

Among the PMI Nitronic 50 series, alloy bars with diameters of 20 mm, 55 mm, and 120 mm are extremely popular in the market; these product specifications are particularly well-regarded due to their broad applicability across various industries.

Comparison of Product Advantages and Disadvantages

Compared to other high-temperature alloys (such as Inconel 625), the main advantages of Nitronic 50 include:

- Excellent corrosion resistance and wear resistance, especially in high-temperature environments

- High strength, making it suitable for high-load applications

Disadvantages may include:

- At extremely high temperatures (beyond 1200°F/649°C), Nitronic 50 may not perform as well as certain specific nickel alloys

- In environments with stronger corrosive agents, while its corrosion resistance is commendable, material choice should be based on specific applications

User Experiences

Fatima H., Quality Assuranc Manager, Arabian Steel Manufacturing (Qatar)**

" PMI demonstrates an exceptional commitment to quality. The EN 10204 3.1 certification provides us with confidence in their products. Their nickel alloys have significantly aided our production processes while meeting rigorous safety and performance standards."

Desciption

Nitronic 50 Chemical Component

Nitronic 50 Mechanical Properties

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