Hastelloy B-2 Tube: Nickel-Molybdenum Alloy for Superior Acid Resistance

In industries that handle strong acids and corrosive chemicals, material selection is critical. Hastelloy B-2 Tube, a nickel-molybdenum alloy, is engineered to provide outstanding resistance to reducing acids, making it the go-to choice for chemical processing, petrochemical, pharmaceutical, and marine applications. At DLX, we manufacture and supply high-quality, seamless Hastelloy B-2 Tubes that meet the rigorous demands of these industries worldwide.

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Hastelloy B-2, designated UNS N10665, combines nickel and molybdenum in a specialized alloy that delivers exceptional resistance to hydrochloric, sulfuric, and phosphoric acids. Unlike other nickel alloys, B-2 is specifically designed for reducing environments, offering superior performance in pipelines, reactors, heat exchangers, and chemical transfer systems.

DLX produces seamless tubes under ASTM B622 or ASTM B3 standards, ensuring precise dimensions, high structural integrity, and no weak weld points. Each tube undergoes strict quality control, including chemical composition verification, mechanical testing, and corrosion resistance evaluation, to ensure performance reliability.

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 B-2 Tubes are widely used in sectors where reducing acid resistance is crucial:

• Chemical Processing: Perfect for hydrochloric and sulfuric acid handling systems, evaporators, and reactors where reducing acids are present.

• Petrochemical Industry: Used in pipelines, condensers, and process lines handling corrosive streams with reducing agents.

• Pharmaceutical Manufacturing: Supports chemical processing lines exposed to acids during production, ensuring system longevity and purity.

• Marine Applications: Employed in seawater handling and desalination plants where localized reducing environments exist.

• Environmental Protection: Used in scrubbers, waste treatment, and chemical neutralization systems.

• Research & Laboratory Equipment: Ensures chemical compatibility in experimental setups involving reducing acids.

DLX offers seamless tubes in a range of diameters, wall thicknesses, and lengths, providing tailored solutions for specific industrial requirements.

The global market for nickel-molybdenum alloys like Hastelloy B-2 is expanding due to the growing need for specialized corrosion-resistant materials in critical industries. Key factors driving demand include:

1. Chemical Plant Expansion: Increasing production complexity requires materials capable of resisting highly corrosive reducing acids.

2. Pharmaceutical Industry Growth: Modern pharmaceutical production relies on corrosion-resistant systems to maintain chemical purity.

3. Marine Infrastructure Development: Reducing environments in seawater systems demand materials like B-2 to prevent rapid corrosion.

4. Environmental Protection Initiatives: Advanced waste treatment systems require alloys that can resist corrosive chemicals.

5. Petrochemical Facility Growth: Expanding chemical pipelines and reactor systems increase demand for high-performance alloys.

DLX’s expertise in delivering reliable, high-quality Hastelloy B-2 Tubes positions it to serve these evolving market needs efficiently.

Comparison Table: Hastelloy B-2 Tube vs Other Alloys

DLX distinguishes itself in the industry by providing not just materials but complete solutions:

• ASTM Compliance: Every tube adheres to ASTM B622 or B3 standards for seamless nickel-molybdenum tubing.

• Customization: Tubes are produced in diameters, wall thicknesses, and lengths specific to project requirements.

• Quality Assurance: Rigorous testing ensures chemical composition, mechanical strength, and acid resistance.

• Technical Support: DLX offers guidance for welding, installation, and machining to optimize performance.

• Global Logistics: Efficient supply chains ensure timely delivery worldwide.

• Cost-Effective Value: Provides specialized, high-performance tubing with competitive pricing.

This combination of quality, expertise, and service makes DLX the preferred partner for industries that rely on Hastelloy B-2 Tubing.

When selecting tubing for corrosive environments, Hastelloy B-2 stands out for reducing acid resistance. Stainless steel 316L may fail in hydrochloric and sulfuric acid conditions, while Hastelloy C-22 and C-276 excel in mixed oxidizing/reducing environments but are overengineered for strictly reducing acid applications.

Hastelloy B-2 offers specialized resistance, mechanical reliability, and cost-effectiveness for pipelines, heat exchangers, and reactors where reducing acids dominate. DLX’s seamless tubes enhance these advantages by eliminating weld-related weaknesses and ensuring uniform performance.

The demand for ASTM-compliant UNS N10665 Hastelloy B-2 Tubing is expected to grow steadily across key sectors:

• Expansion of chemical and petrochemical facilities handling reducing acids.

• Pharmaceutical manufacturing lines requiring corrosion-resistant materials.

• Marine and desalination projects with localized reducing environments.

• Waste treatment and environmental protection systems requiring chemical durability.

DLX is well-positioned to support this growing market with technical expertise, high-quality seamless tubes, and global supply chain capabilities.

Conclusion

Hastelloy B-2 Tube is a high-performance nickel-molybdenum alloy designed for superior resistance to reducing acids in challenging industrial environments. Its combination of chemical resistance, mechanical strength, and seamless construction makes it ideal for chemical, petrochemical, pharmaceutical, and marine applications.

DLX delivers these tubes with strict quality control, customization, technical guidance, and reliable global logistics. Partnering with DLX ensures access to high-quality, specialized Hastelloy B-2 Tubing capable of performing in the most demanding reducing acid environments, offering both efficiency and long-term reliability.

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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 B-2 Tube?
A1: Hastelloy B-2 Tube is a nickel-molybdenum alloy tube designed to resist strong reducing acids and corrosive chemical environments.

Q2: Which industries primarily use Hastelloy B-2 Tubes?
A2: Chemical processing, petrochemical, pharmaceuticals, marine, and environmental protection industries commonly use them.

Q3: How does Hastelloy B-2 perform in reducing acids?
A3: It exhibits excellent resistance to hydrochloric, sulfuric, and phosphoric acids.

Q4: Can Hastelloy B-2 handle oxidizing agents?
A4: It has limited resistance to strong oxidizers, and care should be taken in highly oxidizing environments.

Q5: What temperature range is suitable for Hastelloy B-2 Tubes?
A5: They can perform reliably up to approximately 500°C in reducing acid environments.

Q6: Are these tubes seamless or welded?
A6: DLX provides seamless tubes, ensuring high structural integrity and eliminating weld-related weaknesses.

Q7: How does Hastelloy B-2 compare to other nickel alloys?
A7: It excels in reducing acid environments where other nickel alloys may fail, providing specialized corrosion resistance.

Q8: Why choose DLX for Hastelloy B-2 Tubes?
A8: DLX offers ASTM-compliant manufacturing, precise quality control, technical support, and reliable global delivery.