Hastelloy C-4 ( UNS N06455 ) super alloy metallographic stability and oxidation resistance

General Overview:

Hastelloy C-4 is a nickel-chromium-molybdenum alloy known for its exceptional resistance to a wide variety of chemical environments and its stability across a broad range of temperatures. It is specifically designed to resist corrosion in highly aggressive conditions, making it suitable for use in chemical processing, pollution control, and other demanding industrial applications.

Hastelloy C-4 offers excellent resistance to localized corrosion such as pitting and crevice corrosion, as well as resistance to stress corrosion cracking. It performs well in both oxidizing and reducing environments and is resistant to a wide range of acids, including sulfuric, hydrochloric, and nitric acids. The alloy maintains its mechanical properties and corrosion resistance across a wide range of temperatures, making it suitable for high-temperature applications up to approximately 1038°C (1900°F). Hastelloy C-4 can be readily fabricated using standard techniques, including welding, which retains its corrosion resistance after welding. The alloy's composition is designed to prevent the formation of grain-boundary precipitates in the weld heat-affected zone, ensuring it remains resistant to intergranular corrosion after welding.

Applications:

Hastelloy C-4 is utilized in various industries due to its outstanding corrosion resistance and thermal stability:

1. Chemical Processing:

   • Reactors, heat exchangers, and evaporators.
   • Components exposed to highly corrosive environments, such as acid production and processing equipment.

2. Pollution Control:

   • Equipment used in flue gas desulfurization systems.
   • Scrubbers and ducting for handling corrosive gases.

3. Nuclear Industry:

   • Components that require resistance to corrosive environments and radiation.

4. Pharmaceutical Industry:

   • Equipment used in the production and handling of pharmaceuticals where purity and resistance to contamination are critical.

5. Pulp and Paper Industry:

   • Digesters, bleach plants, and other equipment exposed to harsh chemicals.

Company Overview:

Jiangyin Chengxin Alloy Material Co., Ltd has more than 20 years of experience as the lead.ing alloy wire manufacturer in China. We offer a wide range of services from fine wire drawing toresistance wire manufacturing. Since the beginning, our specialty has been the quality and preci.sion of our products. We have the tightest tolerances and deliver within a few days to a fewweeks. As a result, we have become the leading alloy wire supplier in the industry.

Senphus Subsidiaries:

• Jiangyin Chengxin Alloy Material Co., Ltd.
• Jiangyin Senphus Electrical Materials Co., Ltd.
• Jiangsu Xiangcheng Supply Chain Management Co., Ltd.

Jiangyin Chengxin Alloy Material Co., Ltd.: With nearly 20 years of experience, Jiangyin Chengxin is a leading alloy wire manufacturer in China. We offer a wide range of services, from fine wire drawing to resistance wire manufacturing. Our specialty lies in the quality and precision of our products, achieving the tightest tolerances and delivering orders within days to weeks. As a result, we have established ourselves as the premier supplier of alloy wire in the industry.

Our product range includes:

• Copper-nickel alloys (CuNi1-CuNi44)
• Karma (Nikrothal L/Evanohm/Alloy 800)
• Manganin and Constantan
• Nickel-chromium alloys
• Thermocouple alloys (Type K, N, E, T, J)
• Thermocouple extension wire
• PTC thermistor resistance alloy
• Pure nickel wire and Monel alloy

These alloys are available in various forms, including wire, ribbon, stranded, and enamelled. Major applications include seat heating, underfloor heating, military projects, aerospace, household appliances, heating wire, mechanical and electrical plants, and temperature instruments. Our manufacturing processes are ISO 9001:2015 certified, and we specialize in fine and ultra-fine wire drawing, offering wire diameters from 0.025 mm (0.001") to 13 mm (0.51") in small batches, medium volumes, and mass production. We maintain a comprehensive quality inspection system, including in-house chemical analysis, chromatographic analysis, metallurgical analysis, pinhole tests, wire construction tests, and tension tests to ensure the highest quality standards.

Senphus Electrical Material Co., Ltd.: Founded in 2003, Senphus Electrical Material Co., Ltd. integrates research, manufacturing, and sales of electric heating alloys, heating cables, heating wires, and heating products. Leveraging over a decade of technical expertise in heating alloy wire, we have adopted advanced heating cable technology and machinery, successfully developing heating cables, temperature controllers, and temperature control systems suitable for building heating, pipe insulation, outdoor snow melting, wind power blade production, car seat heating, and healthcare applications.

The company is recognized as a high-tech enterprise in Jiangsu Province and a small giant enterprise in Jiangyin City, specializing in innovative technologies. We operate the "Wuxi Heating Cable Engineering Technology Research Center" and collaborate with experts from renowned domestic universities. Our portfolio includes 5 invention patents and over 30 utility model patents, showcasing our strong research and development capabilities.

With an annual output exceeding 1,000 tons of thermal alloy wire and an output value of approximately 105 million yuan, our products are well-received in markets such as the UK, Italy, Canada, Peru, and Spain. Our heating cables generate an annual output value of over 80 million yuan, with exports to Germany, Japan, the United States, Malaysia, Denmark, Brazil, and other countries.

The company has successfully passed multiple quality management system certifications, including IATF 16949, ISO 9001, ISO 14001 (Environmental Management System), and ISO 45001 (Occupational Health and Safety Management System). Our heating cables and related products have also obtained test reports from the Shanghai Cable Research Institute Test Center and received certifications such as UL (United States), VDE (Germany), CE (European Union), and RoHS.

Commitment to Quality: We adhere to the business commitment of "Reputation First, Quality First, Customer First" and uphold the quality policy of "Integrity-Based, Quality-Oriented, Excellent Service." We are dedicated to providing accurate products and professional services, and we look forward to collaborating sincerely with you to achieve mutual success.