Nitronic 40 Round Bar(AMS 5656 / AMS 5595)
A High-Performance Austenitic Stainless Steel for Demanding Applications
Nitronic 40 (AMS 5656 / AMS 5595) round bar is a premium-grade austenitic stainless steel renowned for its exceptional strength, corrosion resistance, and high-temperature performance. With a unique composition of 21% chromium, 6% nickel, and 9% manganese, this nitrogen-strengthened alloy delivers superior mechanical properties in the annealed condition while maintaining excellent fabricability and weldability.
Key Properties of Nitronic 40 (AMS 5656 / AMS 5595) Round Bar
Cryogenic Toughness
– Maintains structural integrity in extremely low-temperature environments.
High Strength in Annealed Condition
– Offers greater yield and tensile strength compared to conventional stainless steels like 304 and 316.
Outstanding Corrosion Resistance
– Resists oxidation at elevated temperatures and performs well in harsh chemical environments.
Non-Magnetic
– Remains nonmagnetic even after severe cold working, making it ideal for sensitive applications.
Excellent Fabricability
– Can be machined, formed, and welded using techniques similar to 300-series stainless steels.
Specifications & Standards
Nitronic 40 round bar complies with multiple industry standards, including:
AMS 5656 (Bar, Wire, Rings, Extrusions)
AMS 5595 (Sheet, Plate, Strip)
ASTM A276 / ASME SA276 (Stainless Steel Bars)
ASTM A412 / ASME SA412 (Seamless & Welded Tubes)
UNS S21906 – Unified Numbering System designation
Chemical Composition
| Weight% | C | P | Si | Ni | Fe | Mn | S | Cr | N | Mo | Cu |
| Nitronic 40 (21-6-9) | 0.04 max | 0.060 max | 1.00 max | 5.5-7.5 | Bal | 8-10 | 0.030 max | 19-21.5 | 0.15-0.40 | 0.75 max | 0.75 max |
Typical Mechanical Properties
| Alloy | Cross Section Size | Test Direction | Yield Strength 0.2% | Ultimate Tensile Strength | Elongation in 2"(%) | Reduction of Area % | Rockwell B Hardness | ||
| ksi | MPa | ksi | MPa | ||||||
| Nitronic 40 (21-6-9) | 6" (152mm) sq | Longitudinal | 62 | 428 | 95 | 655 | 46 | 69 | |
| Nitronic 40 (21-6-9) | 6" (152mm) sq | Transverse | 52 | 358 | 93 | 641 | 30 | 45 | |
| Nitronic 40 (21-6-9) | 4" (102mm) sq | Longitudinal | 56 | 386 | 97 | 668 | 53 | 73 | |
| Nitronic 40 (21-6-9) | 1" (25.4mm)sq | Longitudinal | 52 | 358 | 101 | 696 | 53 | 73 | 90 |
Applications of Nitronic 40 Round Bar
Due to its robust properties, Nitronic 40 (AMS 5656 / AMS 5595) round bar is widely used in:
- Aerospace & Defense – Aircraft engine components, ducting, and bellows
- Chemical Processing – Equipment exposed to corrosive media
- Cryogenic Systems – Components requiring low-temperature durability
- Marine & Offshore – High-strength, corrosion-resistant fasteners and fittings
Why Choose Nitronic 40 Round Bar?
For engineers and manufacturers seeking a high-performance stainless steel that balances strength, corrosion resistance, and ease of fabrication, Nitronic 40 (AMS 5656 / AMS 5595) round bar is an outstanding choice. Its versatility makes it a preferred material for critical applications across aerospace, chemical, and cryogenic industries.
Whether for precision machining, structural components, or high-stress environments, Nitronic 40 delivers unmatched reliability and longevity. For high-quality round bar stock meeting stringent AMS and ASTM specifications, this alloy stands as a top-tier engineering solution.
Lork Group is a trusted supplier of high-quality Nitronic 40 (AMS 5656 / AMS 5595) round bar, providing premium austenitic stainless steel for aerospace, chemical processing, and cryogenic applications. Our Nitronic 40 round bars deliver exceptional strength, corrosion resistance, and non-magnetic properties, making them ideal for demanding environments.
Why Choose Lork Group for Nitronic 40 Round Bar?
- High-Quality Material – Fully compliant with AMS 5656, AMS 5595, ASTM A276, and ASME SA276 standards.
- Competitive Pricing – Cost-effective solutions without compromising performance.
- Global Supply – Reliable logistics and on-time delivery worldwide.
- Technical Support – Expert guidance on material selection and application suitability.
Contact Lork Group today for Nitronic 40 round bar specifications, pricing, and availability! Get a fast quote and discover why leading industries trust us for high-performance stainless steel solutions.
Email: susan@lorkgroup.com
WhatsApp: +86 19937075488
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