- High strength: up to twice the yield strength of 304/316 stainless steel
- Excellent corrosion resistance in seawater and chloride environments
- Superior resistance to pitting and crevice corrosion
- Good mechanical properties at both low and high temperatures
- Non-magnetic in annealed condition (slightly magnetic after cold working)
- Excellent machinability and weldability
XM-19 Round Bar Nitronic 50 / UNS S20910 Stainless Steel Rod
XM-19 Round Bar, also known as Nitronic 50 stainless steel bar or UNS S20910 round bar, is a high-performance austenitic stainless steel designed for extreme corrosion and high-strength applications. It delivers significantly higher mechanical strength than 304 and 316 stainless steels while maintaining excellent resistance to seawater, chloride environments, and chemical corrosion.
As a premium corrosion resistant stainless steel round bar, XM-19 is widely used in marine engineering, oil & gas systems, chemical processing equipment, and high-load mechanical components.
Key Features of XM-19 Stainless Steel Round Bar
XM-19 stainless steel bar combines strength and corrosion resistance, making it a preferred material in demanding environments:
- High strength stainless steel alloy bar (2× stronger than 304/316)
- Excellent resistance to seawater and chloride corrosion
- Outstanding pitting and crevice corrosion resistance
- Stable mechanical properties in high and low temperatures
- Non-magnetic in annealed condition
- Excellent machinability and weldability
- Long service life in aggressive environments
Chemical Composition (UNS S20910 / Nitronic 50)
XM-19 round bar is engineered with a balanced alloy composition:
- Chromium (Cr): 20.5 – 23.5%
- Nickel (Ni): 11.5 – 13.5%
- Manganese (Mn): 4 – 6%
- Molybdenum (Mo): 1.5 – 3%
- Nitrogen (N): 0.2 – 0.4%
This combination enhances corrosion resistance and improves mechanical strength, especially in marine grade stainless steel bar applications.
Mechanical Properties
XM-19 stainless steel round bar offers superior performance under stress:
- Tensile Strength: 690 – 930 MPa
- Yield Strength: ≥ 380 MPa (higher after cold working)
- Elongation: ≥ 35%
- Excellent fatigue resistance
Product Specifications
We supply XM-19 round bar stock for marine and industrial applications:
- Diameter: 5mm – 300mm (custom sizes available)
- Length: 1m / 3m / 6m / cut-to-length
- Surface Finish: Black, Bright, Polished, Ground
- Standards: ASTM A276, ASTM A479, UNS S20910
- Supply Condition: Hot rolled / Cold drawn / Forged
Applications of XM-19 Round Bar
XM-19 stainless steel rod is widely used across industries requiring corrosion resistance and high strength:
- Marine engineering and seawater systems
- Shipbuilding and offshore platforms
- Oil and gas industry equipment
- Chemical processing plants
- Pumps, valves, and fasteners
- Heat exchangers
- Aerospace and precision engineering
- Food processing machinery
Its performance makes it a strong alternative to duplex stainless steels and high-nickel alloys.
Advantages Compared to 316 Stainless Steel
XM-19 offers clear performance advantages:
- Higher strength → allows lighter structural design
- Better corrosion resistance in chloride environments
- Improved wear and fatigue resistance
- Longer service life → reduced maintenance cost
- Ideal upgrade from 316 stainless steel round bar
FAQ – XM-19 Round Bar
1. What is XM-19 stainless steel round bar?
XM-19 round bar (Nitronic 50 / UNS S20910) is a high-strength, corrosion-resistant stainless steel used in marine, chemical, and industrial applications.
2. Is XM-19 better than 316 stainless steel?
Yes. XM-19 stainless steel bar offers significantly higher strength and better resistance to chloride corrosion and pitting compared to 316 stainless steel.
3. What is XM-19 used for?
It is commonly used in seawater systems, offshore structures, pumps, valves, fasteners, and chemical processing equipment where high strength and corrosion resistance are required.
4. Is XM-19 magnetic?
In annealed condition, XM-19 is non-magnetic. However, slight magnetism may appear after cold working.
5. Can XM-19 round bar be welded?
Yes, XM-19 stainless steel rod has good weldability using standard stainless steel welding methods.
6. What sizes are available for XM-19 round bar?
We supply XM-19 stainless steel round bar in diameters from 5mm to 300mm, with custom cutting available upon request.
7. What industries use XM-19 stainless steel bar?
It is widely used in marine engineering, oil & gas, aerospace, chemical processing, and heavy industrial manufacturing.
Get a Quote
Looking for a reliable XM-19 stainless steel bar supplier?
Contact us now for best price and fast delivery.
Email: sales@hengyimetal.com
WhatsApp: +86 19521258704
View more stainless steel products
904L Stainless Steel Properties
