When the process chemistry or temperature exceeds what stainless steels can handle, nickel alloys and super alloys take over. Roben Manufacturing fabricates pressure vessels, reactors, and components in the full range of nickel-based materials for severe corrosion and high-temperature service, backed by the welding expertise these demanding alloys require.
Nickel alloys are an investment, and they reward disciplined fabrication. We help you match the alloy to the corrosive species, temperature, and mechanical demands of the service, then build the equipment with the procedures and controls that protect the alloy's hard-won properties.
Alloys for the Most Demanding Service
Nickel alloys resist a wide spectrum of corrosive environments that defeat stainless steel: hot concentrated acids, chloride-rich media, reducing and oxidizing conditions, and aggressive mixed acids. Their resistance comes from carefully balanced chemistry, and the choice among the various nickel-chromium-molybdenum and nickel-molybdenum grades depends on the specific corrosive species and conditions present.
Super alloys extend performance to high temperatures, retaining strength and resisting oxidation and creep where ordinary metals would weaken or scale. These materials serve in high-temperature reactors, heat-recovery equipment, and other duties at the upper edge of the temperature envelope.
Fabrication discipline is everything with these alloys. They are sensitive to contamination, heat input, and welding technique, and a poorly executed weld can become a corrosion initiation site that undermines the entire investment. We use qualified procedures, clean-room-grade joint preparation where appropriate, controlled heat input, and matching or over-matching filler metals to preserve corrosion resistance and mechanical integrity.
Every nickel-alloy vessel ships with full material traceability and the weld and NDE records that document its integrity. Because the material cost is high, we also engineer efficiently — using clad construction where a thin alloy layer on a steel backing achieves the same protection at lower cost when the design permits.
Why Choose Roben Manufacturing
- Full nickel-alloy and super-alloy range. We fabricate the spectrum of nickel-based materials for severe corrosion and high-temperature duties.
- Alloy selection guidance. We help match the grade to the specific corrosive species, temperature, and mechanical demands of your service.
- Welding expertise for sensitive alloys. Qualified procedures, clean joint preparation, and controlled heat input preserve corrosion resistance at the welds.
- Cost-efficient design. Where the design permits, clad construction delivers alloy protection on a steel backing at lower material cost.
- Complete documentation. Full material traceability and weld and NDE records accompany every vessel.
Key Features & Capabilities
- Fabrication in nickel-chromium-molybdenum and related grades
- Super alloys for high-temperature strength and oxidation resistance
- Alloy selection for specific corrosive environments
- Qualified welding with contamination control
- Matching and over-matching filler-metal selection
- Controlled heat input to protect alloy properties
- Clad construction option for cost efficiency
- Solution annealing and heat treatment as required
- Full mill test report traceability
- Comprehensive weld and NDE documentation
Applications & Industries Served
- Reactors and vessels for aggressive acid service
- Chloride-rich and mixed-acid process equipment
- High-temperature reactors and heat-recovery units
- Pharmaceutical and fine-chemical corrosive processes
- Petrochemical equipment in severe environments
- Components subject to combined corrosion and high temperature
Codes, Standards & Quality Assurance
Roben Manufacturing fabricates under a controlled quality system and holds the ASME U Certificate of Authorization, with registration through the National Board of Boiler and Pressure Vessel Inspectors. Every applicable project is supported by material test reports, qualified welding procedures, nondestructive examination records, and complete documentation.
Relevant standards and resources include: ASTM International; ASME Boiler and Pressure Vessel Certification.
Frequently Asked Questions
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