Here at DLX, we're proud to be at the forefront of providing high-performance materials that keep industry moving. Our Cr30Ni70 Nichrome Bar is a prime example of engineering excellence, designed to meet the rigorous demands of modern industrial heating and metal processing applications like annealing and forging. Let's dive into what makes this alloy special and why it should be your material of choice.
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Product Introduction: The Powerhouse Performer
Cr30Ni70 is a nickel-chromium alloy that stands out for its exceptional combination of high-temperature strength, outstanding oxidation resistance, and superior corrosion resistance . With a nominal composition of ~70% Nickel and ~30% Chromium, this alloy is meticulously engineered to deliver reliability when the heat is on.
Performance / material | Cr30Ni70 | Cr20Ni35 | Cr20Ni30 | ||||
Composition | Ni | 90 | Rest | Rest | 55.0~61.0 | 34.0~37.0 | 30.0~34.0 |
Cr | 10 | 20.0~23.0 | 28.0~31.0 | 15.0~18.0 | 18.0~21.0 | 18.0~21.0 | |
Fe | -- | ≤1.0 | ≤1.0 | Rest | Rest | Rest | |
Maximum temperature℃ | 1300 | 1200 | 1250 | 1150 | 1100 | 1100 | |
Meltiing point ℃ | 1400 | 1400 | 1380 | 1390 | 1390 | 1390 | |
Density g/cm3 | 8.7 | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 | |
Resistivity at 20℃ (μΩ·m) | -- | 1.09±0.05 | 1.18±0.05 | 1.12±0.05 | 1.00±0.05 | 1.04±0.05 | |
Elongation at rupture | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | |
Specific heat (J/g.℃) | -- | 0.44 | 0.461 | 0.494 | 0.5 | 0.5 | |
Thermal conductivity (KJ/m.h℃) | -- | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 | |
Coefficient of lines expansion a×10-6/(20~1000℃) | -- | 18 | 17 | 17 | 19 | 19 | |
Micrographic structure | -- | Austenite | Austenite | Austenite | Austenite | Austenite | |
Magnetic properties | -- | Non-magnetic | Non-magnetic | Non-magnetic | Weak magnetic | Weak magnetic | |
Shape | Size (mm) |
Wire | 0.05-7.5 |
Rod | 8-50 |
Ribbon | (0.05-0.35)*(0.5-6.0) |
Strip | (0.5-2.5)*(5-40) |
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The magic of Cr30Ni70 lies in its chemistry. The high nickel content provides excellent stability and resistance against reducing media, while the chromium component is the key to its superhero-like oxidation resistance. When exposed to high temperatures, chromium forms a dense, protective layer of Cr₂O₃ (chromium oxide) on the surface, effectively shielding the underlying material from further degradation . This makes our DLX Cr30Ni70 Nichrome Bar a true workhorse for applications involving sustained high heat.
Key characteristics of our DLX Cr30Ni70 Bar include:
High-Temperature Prowess: It can handle continuous operating temperatures up to 1200°C (2192°F) , and even higher for short durations, all while maintaining its structural integrity.
Impressive Mechanical Strength: It boasts a room temperature tensile strength of ≥550 MPa , and it retains a significant portion of this strength at elevated temperatures, with about 300-400 MPa at 1000°C .
Excellent Resistance to Degradation: It resists scaling and oxidation far better than common stainless steels like 316L, and it also offers good resistance to various corrosive atmospheres .
Applications: Built for the Toughest Jobs
Our DLX Cr30Ni70 Nichrome Bar finds its purpose wherever heat and reliability are non-negotiable. Its robust nature makes it an ideal material for designing and building critical components in demanding environments.
Industrial Annealing & Forging: This is where our Cr30Ni70 Bar truly shines. It's perfectly suited for constructing:
Heat treatment furnace components: Including rails, beams, and brackets that hold heavy workloads at high temperatures.
Annealing trays and fixtures: Offering longevity and preventing contamination of precision parts during annealing processes.
Forging tooling: Where it withstands the repetitive thermal cycles and abrasive conditions.
Beyond Metal Processing:
The utility of Cr30Ni70 extends across various sectors, showcasing its versatility :
Aerospace: Used in engine components, turbine blades, and rocket motor parts where high temperature strength is critical .
Energy Sector: Plays a role in nuclear reactor components and gas turbine hot sections .
Chemical Processing: Its corrosion resistance makes it suitable for equipment handling aggressive chemicals like sulfuric acid .
Electronics & Heating: Its consistent resistivity (~1.18 μΩ·m at 20°C ) and positive temperature coefficient make it excellent for high-quality electrical heating elements.
Industry Trends: Smart Manufacturing and Efficiency Gains
The industrial heating sector is constantly evolving, with a strong push towards greater efficiency, reduced downtime, and smarter processes. There's a growing demand for materials that not only perform better but also contribute to lower lifecycle costs and improved sustainability.
Cr30Ni70 is well-positioned within these trends. Its exceptional durability and longer service life directly translate to reduced maintenance frequency, less material waste, and higher overall equipment effectiveness (OEE). This means less downtime for replacements and more consistent production output for our customers.
Furthermore, advancements in additive manufacturing (3D printing) are opening new doors for creating complex, custom-designed furnace components and heating elements from alloys like Cr30Ni70 . DLX is actively exploring these possibilities to offer even more value and innovative solutions to our clients. The global market for high-performance nickel-chromium alloys is significant and growing, driven by advancements in energy, aerospace, and advanced manufacturing .
The DLX Advantage: Your Trusted Partner
While Cr30Ni70 is a known alloy, not all suppliers are created equal. At DLX, we differentiate ourselves through unwavering commitment to quality and performance.
Superior Material Consistency: We implement rigorous quality control throughout our production process, from sourcing raw materials to final inspection. This ensures every bar of DLX Cr30Ni70 delivers the consistent chemical composition and mechanical properties you need for reliable performance.
Deep Technical Expertise: We don't just sell metal; we sell solutions. Our team possesses extensive knowledge in high-temperature applications and is ready to provide technical support to help you select the right grade and optimize your designs for maximum longevity and performance.
Reliable Supply Chain: We understand the critical nature of your operations. DLX maintains a robust supply chain and inventory management system to ensure we can meet your demands promptly and reliably, minimizing disruptions to your production schedule.
Value Beyond Price: We focus on delivering total cost of ownership value. While our material might sometimes come at a premium, its extended service life and reduced failure rates lead to significant cost savings and peace of mind over the long run.
| Property | DLX Cr30Ni70 | Typical 316L Stainless Steel | Advantage of Cr30Ni70 |
|---|---|---|---|
| Max. Oxidizing Temp. | 1200°C | 870°C | +330°C higher operating temperature |
| Room Temp. Tensile Strength | ≥550 MPa | ≥485 MPa | Higher mechanical strength |
| Density | ~8.3 g/cm³ | ~8.0 g/cm³ | Comparable |
| Resistivity (20°C) | ~1.18 μΩ·m | ~0.75 μΩ·m | Better for heating elements |
| Major Feature | Excellent oxidation resistance & hot strength | Good general corrosion resistance | Superior performance in high-temperature industrial heating |
| Typical Use | Industrial heating elements, furnace components, annealing fixtures | General corrosion-resistant parts, lower temp. applications | Essential for severe high-temperature and corrosive environments |
Choosing the right material for high-temperature industrial applications like annealing and forging is a critical decision that impacts productivity, efficiency, and bottom-line costs. Our DLX Cr30Ni70 Nichrome Bar offers a powerful blend of exceptional high-temperature strength, outstanding oxidation resistance, and proven durability.
It’s a smart investment for engineers and procurement managers looking to enhance equipment performance, reduce maintenance cycles, and achieve greater operational reliability. In a world demanding smarter and more efficient industrial processes, partnering with a knowledgeable and quality-focused supplier like DLX makes all the difference.
Ready to experience the DLX difference in your application? Contact us today to discuss how our Cr30Ni70 Nichrome Bar can provide a robust solution for your most challenging industrial heating needs.
About Us:
Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications.
For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.
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FAQs
What is the maximum continuous service temperature for Cr30Ni70?
Up to 1200°C (2192°F) in oxidizing atmospheres.What is the typical resistivity of Cr30Ni70?
Approximately 1.18 μΩ·m at 20°C.Is Cr30Ni70 magnetic?
No, it is non-magnetic due to its austenitic structure.How does its high temperature strength compare to 316L stainless steel?
It retains significantly higher strength at temperatures above 870°C compared to 316L.Can Cr30Ni70 be welded?
Yes, it has good weldability, often using ERNiCr-3 type filler wire.What are its main advantages in industrial furnace applications?
Exceptional oxidation resistance, high hot strength, and long service life reducing downtime.What is the density of Cr30Ni70?
Approximately 8.1 - 8.45 g/cm³.Does DLX offer technical support for material selection and application design?
Yes, DLX provides extensive technical support to help customers optimize their designs and select the right materials.