Nickel Chrome Alloy Wire 0.1mm 0.3mm Nicr3070 Resistance Nichrome Wire 8.45 g/cm³

Product Introduction

The application of Cr30Ni70 Wire in precision instruments and equipment is mainly due to its excellent resistance performance and high temperature stability. The main components of this alloy include 30% chromium (Cr) and 70% nickel (Ni), and the combination of these components makes it perform well in high temperature and corrosive environments. The physical properties of Cr30Ni70 Wire include density 8.1 g/cm³, melting point 1380°C, resistivity at 20°C is about 1.18 μΩ·m, thermal expansion coefficient (20°C-1000°C) is 17×10⁻⁶/°C, and thermal conductivity (20°C) is 14 W/m·K.
In precision instruments and equipment, Cr30Ni70 Wire is widely used to manufacture various resistance components, such as resistors, potentiometers, thermistors, etc. Its high resistivity and stable resistance characteristics enable it to generate stable heat when current passes through it, while maintaining good corrosion resistance and oxidation resistance, ensuring the reliability and safety of the equipment in long-term use. In addition, Cr30Ni70 Wire has a low temperature coefficient of resistance, which means that within a wide temperature range, the change in resistance value is very small, so its resistance value has a high stability, which is particularly suitable for use in precision instruments and constant temperature electric heating elements.

Size dimension range:

Wire: 0.01-10mm

Ribbons: 0.05*0.2-2.0*6.0mm

Strip: 0.05*5.0-5.0*250mm

NiCr series: Cr10Ni90,Cr20Ni80, Cr30Ni70, Cr15Ni60, Cr20Ni35, Cr20Ni30

Parameter

Specific Applications

1. Temperature sensor: It can be used to manufacture the core components of temperature sensors such as thermocouples and thermistors. These sensors need to accurately measure temperature in high temperature environments. The resistivity of Cr30Ni70 Wire changes little and is stable, which can provide accurate temperature signals and ensure the accuracy of measurements.
2. Pressure sensor: Cr30Ni70 Wire can also play an important role in pressure measurement in high temperature and high pressure environments. Its good mechanical properties and stability can ensure the reliable operation of the sensor in harsh environments and provide accurate data for pressure monitoring in industrial production processes.

Advantages and Characteristics

• High resistivity: Cr30Ni70 alloy has a high resistivity, usually in the range of 1.1 - 1.3 × 10⁻⁶ Ω·m at 20°C. As the temperature increases, its resistivity shows a certain positive temperature coefficient (PTC) change, that is, the resistivity increases as the temperature rises, which makes it particularly suitable for electric heating elements.
• Stable temperature coefficient: The resistivity of this alloy changes less in high temperature environments and shows good temperature stability. At around 500°C, the resistance value will increase by about 30% compared to room temperature. Such a change characteristic makes it widely used in resistance heating equipment that requires precise temperature control.
• High temperature performance: Cr30Ni70 alloy can work for a long time at temperatures up to 1200°C, and still maintain good oxidation resistance and carburization resistance in high temperature environments. At a high temperature of 1000°C, the oxidation rate of Cr30Ni70 alloy is less than 0.05 mg/cm²·h, ensuring its long-term reliability in high temperature environments.
• Excellent oxidation resistance: Cr30Ni70 alloy effectively prevents the formation of oxide layer in high temperature air environment. Its surface can form a dense chromium oxide film at high temperature, which further improves its corrosion resistance. At high temperatures of 800℃ to 1000℃, the formation speed of Cr2O₃ film is accelerated and the oxidation rate is significantly reduced.

Contact Us

Email:fbwlau@cnrunlai.com

Oem service:
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Support and Services:

Our Nichrome Alloy product comes with technical support and services to ensure optimal performance and customer satisfaction:

• Expert consultation on product selection and application
• Technical assistance for installation and maintenance
• Product testing and analysis for quality control
• Customized solutions for unique customer needs
• Training and education on product use and safety

We are committed to providing our customers with the highest level of support and service for our Nichrome Alloy product.

Packing and Shipping:

Product Packaging:

• The Nichrome Alloy product will be packaged securely in a durable cardboard box to ensure safe transport.
• The product will be wrapped in protective bubble wrap to prevent any damage during shipping.
• A label with the product name and details will be placed on the box for easy identification.

Shipping:

• The product will be shipped via a reputable courier service within 2 business days of receiving the order.
• Customers will receive a tracking number once the product has been shipped.
• Please allow 5-7 business days for delivery.
• If there are any issues with the product or shipping, please contact our customer service team for assistance.

Related Questions and Answers

Q: What is the chemical composition of Cr30Ni70 wire?
A: The main chemical composition of Cr30Ni70 wire is 70% nickel (Ni) and 30% chromium (Cr), and the rest is a small amount of iron (Fe), silicon (Si), manganese (Mn) and other elements. The specific chemical composition is as follows: nickel (Ni) 68-72%, chromium (Cr) 28-31%, iron (Fe) ≤1.0%, manganese (Mn) 0.50%, silicon (Si) 0.50%, carbon (C) ≤0.10%.

Q: What are the physical properties of Cr30Ni70 wire?
A: Cr30Ni70 wire has high resistivity, about 1.18 μΩ·m at room temperature, and the resistivity changes relatively smoothly at high temperature. Its melting point is about 1400°C, and the applicable temperature range is 800°C to 1200°C. The linear expansion coefficient is about 17.0×10⁻⁶/°C in the temperature range of 20°C to 1000°C.

Q: What is the corrosion resistance of Cr30Ni70 wire?

A: Cr30Ni70 wire has excellent corrosion resistance, especially durability in corrosive atmospheres such as sulfides or oxides, making it widely used in industrial fields that require high temperatures and corrosive environments.

Q: What is the oxidation resistance of Cr30Ni70 wire?

A: Cr30Ni70 wire exhibits excellent oxidation resistance in high temperature environments. The increase in chromium content enables the alloy to form a stable oxide layer in an oxidizing atmosphere, effectively preventing further oxidation. The oxidation rate at 1000°C is extremely low, and it can work in a high temperature environment for a long time without losing performance.

CHANGZHOU LIANGRU INTERNATIONAL TRADE CO., LTD.specialized in production of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium Aluminum Alloy, Nickel Aluminum Alloy, Manganin, Copper Nickel Alloy, thermocouple wire, pure nickel and other precision alloy materials in the form of round wire, ribbon wire, sheet, tape, strip, rod and plate.

CHANGZHOU LIANGRU INTERNATIONAL TRADE CO., LTD. company profile 

We’ve already got ISO9001 quality system certificate and approval of ISO14001 environmental protection system.

We own a complete set of advanced production flow of refining, cold reduction, drawing and heat treating etc. We also proudly have independent R&D capacity.

CHANGZHOU LIANGRU INTERNATIONAL TRADE CO., LTD. has accumulated lots of experiences over 20 years in this field. During 20 years, hundreds of management elites and high science and technology talents were employed.They participated in every walk of the company life, which make our company keep blooming and invincible in the competitive market.

Based on the principle of “first quality, sincere service”, our managing ideology is pursuing technology innovation and creating the top brand in the alloy field. We persist in Quality - the foundation of the survival. It is our forever ideology to serve you with full heart and soul. We committed to provide customers all over the world with high-quality, competitive products and perfect service.

Our products, such us nichrome wire, nichrome strip, fecral wire, fecral strip, thermocouple wire, nickel wire, nickel strip have been exported to Europe, USA, India, Southest Asia, South America,etc.

We are willing to establish strong and long-time partnership with our customers

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