Hastelloy C-4 Tube: Durable Nickel-Chromium-Molybdenum Alloy for High-Temperature Applications

Industries that operate under extreme temperatures and aggressive chemical conditions demand materials that can maintain structural integrity and resist corrosion. Hastelloy C-4 Tube, a nickel-chromium-molybdenum alloy, is designed precisely for these conditions. At DLX, we specialize in providing high-quality Hastelloy C-4 Tubes that deliver exceptional performance in chemical processing, petrochemical, aerospace, and marine applications worldwide.

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Hastelloy C-4, designated UNS N06455, is engineered to resist both oxidizing and reducing environments while providing excellent high-temperature strength. Its unique combination of nickel, chromium, and molybdenum allows it to perform in aggressive chemical and thermal environments where other alloys fail.

ASTM B622 governs the production of seamless nickel-alloy tubes, ensuring stringent quality and dimensional accuracy. Seamless tubes are particularly beneficial in high-pressure and high-temperature applications, as they have no welds that can compromise mechanical strength or corrosion resistance.

DLX’s Hastelloy C-4 Tubes meet these international standards, offering precision, durability, and reliability. Each tube undergoes strict chemical analysis and mechanical testing to ensure it can withstand the harshest operating conditions.

Specification

item	HC-276	C-22	C-4	B2	B3	N
C	≤0.01	≤0.015	≤0.015	≤0.02	≤0.01	0.04-0.08
Mn	≤1	≤0.5	≤1	≤1	≤3	≤1
Fe	4-7	2-6	≤3	≤2	≤1.5	≤5
P	≤0.04	≤0.02	≤0.04	≤0.04	--	≤0.015
S	≤0.03	≤0.02	≤0.03	≤0.03	--	≤0.02
Si	≤0.08	≤0.08	≤0.08	≤0.1	≤0.1	≤1
Ni	rest	rest	rest	rest	≤65	rest
Co	≤2.5	≤2.5	≤2	≤1	≤3	≤0.2
Ti+Cu	--	--	≤0.7	--	≤0.4	≤0.35
Al+Ti	--	--	--	--	≤0.5	≤0.5
Cr	14.5-16.5	20-22.5	14-18	≤1	≤1.5	6-8
Mo	15-17	12.5-14.5	14-17	26-30	≤28.5	15-18
B	--	--	--	--	--	≤0.01
W	3-4.5	2.5-3.5	--	--	≤3	≤0.5
V	≤0.35	≤0.35	--	0.2-0.4	--	≤0.5

Shape	Size (mm)
Wire	0.5-7.5
Rod/Bar	8.0-200
Strip	(0.5-2.5)*(5-180)
Tube/Pipe	Custom made
Sheet/Plate	Custom made

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Hastelloy C-4 Tubes are versatile and used in critical applications where durability and corrosion resistance are essential:

• Chemical Processing: Used in heat exchangers, evaporators, and reactor lines handling aggressive oxidizers and reducers.

• Petrochemical Industry: Essential for process lines, condensers, and reactors exposed to complex chemical streams.

• Aerospace: Provides high-temperature strength and corrosion resistance for critical components in propulsion and power systems.

• Marine Engineering: Ideal for offshore platforms, seawater piping systems, and desalination plants exposed to corrosive marine environments.

• Power Generation: Applied in high-temperature process equipment, flue gas handling, and heat exchangers.

• Pharmaceuticals: Ensures system integrity under exposure to strong acids and sterilizing agents.

• Environmental Protection: Used in pollution control, scrubbers, and chemical treatment plants.

DLX provides seamless and welded tubing options in customized dimensions, ensuring optimal performance for any application.

Industry Analysis

The global demand for high-performance nickel alloys like Hastelloy C-4 Tubing is increasing due to multiple industry drivers:

1. Chemical Plant Expansion: The rising complexity of chemical processes requires materials that resist both oxidizing and reducing conditions.

2. Petrochemical Growth: Expanding refineries and processing facilities demand tubes capable of handling aggressive chemical streams.

3. Aerospace Applications: High-temperature, high-strength alloys are critical in propulsion systems and thermal management components.

4. Marine and Offshore Projects: Offshore drilling and seawater exposure necessitate materials resistant to pitting and crevice corrosion.

5. Environmental Compliance: Stricter emission and waste handling regulations increase demand for durable, high-performance tubing.

6. Pharmaceutical Manufacturing: Maintaining purity and preventing corrosion in sterilized systems drives alloy adoption.

These trends ensure strong and sustained growth in the market for Hastelloy C-4 Tubing, positioning DLX as a leading supplier capable of meeting global demand.

Comparison Table: Hastelloy C-4 Tube vs Other Alloys

DLX provides more than just high-quality Hastelloy C-4 Tubes—we offer complete solutions that include:

• ASTM Compliance: Each tube is manufactured in strict adherence to ASTM B622 standards.

• Custom Dimensions: Seamless and welded tubes are available in diameters, lengths, and wall thicknesses tailored to specific requirements.

• Quality Assurance: Chemical composition verification, mechanical testing, and corrosion resistance evaluation are performed on every batch.

• Technical Support: DLX provides guidance on welding, machining, and installation best practices.

• Global Logistics: Efficient supply chains ensure timely delivery to international customers.

• Balanced Value: While premium in performance, DLX offers competitive pricing and reliable supply.

Our focus on precision, reliability, and support makes DLX a trusted partner for industries requiring high-performance nickel-alloy tubes.

When evaluating material options, Hastelloy C-4 stands out. Stainless steel 316L may be cost-effective but cannot withstand extreme chemical environments or high temperatures. Hastelloy C276 is excellent for corrosion resistance but lacks the high-temperature strength provided by C-4.

Hastelloy C-4 Tube offers an ideal combination of high-temperature capability, oxidizing and reducing resistance, and mechanical integrity. DLX’s seamless tube manufacturing further eliminates weak points, ensuring reliable performance in critical applications.

The demand for ASTM B622 UNS N06455 Hastelloy C-4 Tubing will continue to grow across key sectors:

• Expanding chemical and petrochemical infrastructure globally.

• Increased offshore and marine construction.

• Rising requirements in aerospace for high-temperature alloys.

• Environmental protection initiatives driving robust, corrosion-resistant materials.

• Pharmaceutical sector expansion demanding high-purity systems.

DLX is strategically positioned to support this growth, providing high-quality tubes, technical expertise, and global distribution.

Conclusion

Hastelloy C-4 Tube is a high-performance solution for industries requiring corrosion resistance and high-temperature strength. Its unique combination of nickel, chromium, and molybdenum ensures superior performance in both oxidizing and reducing environments.

DLX delivers these tubes with precision, reliability, and expert support, ensuring that industries operating in chemical, petrochemical, marine, aerospace, and environmental sectors achieve maximum efficiency and safety.

Choosing DLX for Hastelloy C-4 Tubing means access to superior materials, strict quality control, technical guidance, and dependable delivery, making it the preferred choice for critical applications worldwide.

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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:

Q1: What is Hastelloy C-4 Tube?
A1: Hastelloy C-4 Tube is a nickel-chromium-molybdenum alloy tube designed for high-temperature and highly corrosive environments.

Q2: Which industries use Hastelloy C-4 Tubes most often?
A2: They are widely used in chemical processing, petrochemicals, aerospace, marine engineering, and power generation.

Q3: How does Hastelloy C-4 perform in oxidizing environments?
A3: It provides excellent resistance to oxidizers such as nitric acid, ferric chloride, and chlorine.

Q4: Can Hastelloy C-4 withstand reducing acids?
A4: Yes, it is resistant to reducing acids like hydrochloric and sulfuric acids.

Q5: What temperature range can Hastelloy C-4 Tubes handle?
A5: They maintain structural integrity and corrosion resistance at temperatures up to approximately 1000°C.

Q6: Are Hastelloy C-4 Tubes available in seamless or welded forms?
A6: DLX provides both seamless and welded tubes, customized for specific application requirements.

Q7: How does Hastelloy C-4 compare to other nickel alloys?
A7: It offers superior high-temperature strength while maintaining broad corrosion resistance across oxidizing and reducing conditions.

Q8: Why choose DLX for Hastelloy C-4 Tubes?
A8: DLX ensures ASTM compliance, strict quality control, precise manufacturing, and reliable global delivery.