Introduction
Our XM-19 stainless steel round bars are engineered for demanding applications in industrial machinery and precision engineering. This high-strength, nitrogen-enhanced austenitic stainless steel offers a superior combination of exceptional strength, excellent corrosion resistance, and good fabrication characteristics. It is the ideal choice for components that must perform reliably in harsh environments, from chemical processing equipment to high-stress aerospace parts.
Key Features & Benefits
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High Strength: Offers significantly higher yield strength than conventional stainless steels like 304 and 316, allowing for lighter-weight designs and higher load-bearing capacity.
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Excellent Corrosion Resistance: Provides outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC), especially in chloride-containing environments.
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Good Toughness & Ductility: Maintains excellent toughness and formability even at cryogenic temperatures, making it suitable for a wide range of operating conditions.
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Non-Magnetic: Exhibits a stable austenitic structure, remaining non-magnetic in all conditions.
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Ease of Fabrication: Can be machined and welded using standard methods, offering good manufacturability for complex components.
Chemical Composition (Typical % Weight)
| Element | Carbon (C) | Manganese (Mn) | Silicon (Si) | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) | Nitrogen (N) | Niobium (Nb) | Vanadium (V) | Phosphorus (P) | Sulfur (S) | Iron (Fe) |
| Content | 0.06 max | 4.00 - 6.00 | 1.00 max | 20.50 - 23.50 | 11.50 - 13.50 | 1.50 - 3.00 | 0.20 - 0.40 | 0.10 - 0.30 | 0.10 - 0.30 | 0.040 max | 0.030 max | Balance |
Mechanical Properties (Solution Annealed Condition - Round Bar)
| Property | Yield Strength (0.2% Offset) | Ultimate Tensile Strength | Elongation (% in 2") | Hardness (Brinell) | Hardness (Rockwell) |
| Value | 65 ksi (450 MPa) min | 100 ksi (690 MPa) min | 35% min | 241 max | HRC 100 max |
Note: Mechanical properties can vary with section size and heat treatment.
Standards & Specifications
Our XM-19 stainless steel bars conform to the following international standards:
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ASTM A479/A479M: Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
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ASTM A276/A276M: Standard Specification for Stainless Steel Bars and Shapes
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AMS 5767: Aerospace Material Specification (Common for bars, forgings, and forging stock)
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UNS S20910: Unified Numbering System designation.
Equivalent Grades
XM-19 is known under various designations globally:
| Standard | Grade/Designation |
| UNS | S20910 |
| Common Name | XM-19, Nitronic 50 |
| European (EN) | 1.3964 (X2CrNiMnMoNNb21-16-5-3) |
| Others | FXM-19, UNS S20910 |
Other Available Products
In addition to round bars, we supply XM-19 stainless steel in various forms to meet your project needs:
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Other Bar Shapes: Hexagonal Bars, Square Bars
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Flat Products: Plates, Sheets, and Strips
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Tubular Products: Pipes, Tubes, and Fittings
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Wire & Billet
Applications
XM-19 round bars are perfectly suited for critical components in:
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Industrial Machinery: Shafts, fasteners, valves, pumps, and high-strength fittings.
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Precision Engineering: Gears, instrument parts, and surgical implants.
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Aerospace: Landing gear components, engine parts, and fasteners.
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Marine & Offshore: Shafting, propeller blades, and fittings exposed to seawater.
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Chemical Processing: Equipment requiring high strength and corrosion resistance.
Contact us today to discuss your specific requirements and request a quote for our high-performance XM-19 stainless steel bars.
