Expert Hastelloy & AL-6XN Fabrication: Specialty Alloys

ISO 9001:2015 Certified
ASME BPVC IX Qualified
Founded 1951

High-nickel and specialty alloys like Hastelloy C-276, C-22, and AL-6XN deliver corrosion resistance that standard stainless steels cannot match, but fabricating them demands specialized expertise. These alloys are sensitive to heat input, prone to hot cracking, and require strict atmospheric control during welding. Improper procedures can compromise the protective passive layer or introduce defects that lead to premature component failure in aggressive chemical environments.

At Northern Manufacturing, we are experts in mitigating this risk. We transform the challenges of specialty alloy fabrication into spec-ready results, delivering spec-ready, high-performance components that meet the stringent demands of industries from Water & Wastewater to Chemical Processing.

  • Custom Stainless Fabrication Experts
  • Advanced Fabrication Technologies
  • Expert Team with Decades of Experience
Home » Stainless Steel Fabrication » Fabricating Hastelloy, AL-6XN & Specialty Alloys

Our Specialty Alloy Fabrication Capabilities

We provide a one-stop-shop solution for the complete fabrication lifecycle of specialty alloy components.

Materials Handled

We have proven experience and qualified procedures for a range of specialty alloys, including

  • AL-6XN (UNS N08367)
  • Hastelloy C-276 (UNS N10276)
  • Hastelloy C-22 (UNS N06022)

Welding & Fabrication: The Core of Our Expertise

Welding is the most critical step

  • Strict Heat Input Control
  • Interpass Temperature Management
  • Qualified Welding Procedures (WPS/PQR)

Forming, Rolling, and Finishing

Leveraging our advanced equipment

  • Heavy Forming & Bending
  • Cylinder & Shell Rolling
  • Pickling & Passivation

Why Partner with a Specialty Alloy Fabrication Expert?

Choosing a fabricator for high-nickel alloys is a critical extension of the engineering process. A non-specialist can introduce hot cracking by running too much heat into Hastelloy, or cause sensitization in AL-6XN by exceeding interpass temperature limits. These failures destroy the corrosion resistance your engineer specified the alloy for in the first place. Our welding procedures, qualified per ASME BPVC Section IX for each specific alloy, control heat input, shielding gas coverage, and interpass temperatures to preserve the metallurgical properties that make these materials worth their cost.

We Mitigate Manufacturability Risk

Our deep experience prevents the costly failures and delays that occur when fabricators cannot meet the tight tolerances and complex weld procedures required for materials like Hastelloy C-276 and AL-6XN.

We Guarantee Metallurgical Integrity

We enforce rigid controls over every thermal operation, from welding to hot forming, to prevent hot cracking, sensitization, and loss of corrosion resistance.

We Deliver Verifiable Quality

As an ISO 9001:2015 certified and ASME-compliant fabricator, we provide the documentation and traceability required for your most critical quality audits.

Quality Assurance & Verification for Specialty Alloy Components

We build trust through verification.
Our ISO 9001:2015 certified Quality Management System incorporates alloy-specific inspection points to guarantee compliance and performance.

ASME Code Compliance

We fabricate components with welding procedures qualified to ASME BPVC Section IX for each specific alloy grade.

Alloy-Matched Post-Weld Treatment

We perform alloy-matched post-weld solution annealing and chemical cleaning per ASTM A380 and A967.

Positive Material Identification (PMI)

Our inspectors use handheld PMI analyzers to verify the grade of all incoming specialty alloy raw materials.

Comprehensive Documentation

We provide full documentation packages, including Material Test Reports (MTRs).

Quality and Compliance as a Cornerstone

For our partners in regulated industries, meticulous documentation and verifiable quality are non-negotiable. Our entire operation is built upon a framework of rigorous quality assurance.

Challenge

A client required a complex manifold for a wastewater treatment facility, a component exposed to high chloride levels that put standard stainless steels at risk of stress corrosion cracking.

Solution

We collaborated with the client, fabricating the assembly from Hastelloy C-276. Our CWI-supervised welding team executed all joints using qualified GTAW procedures, controlling heat input to preserve the material’s superior corrosion resistance.

Outcome

The finished component shipped with a full documentation package: MTRs traceable to heat numbers, weld maps, NDE reports, passivation records, and dimensional inspection results. The assembly has been in service with zero corrosion issues.

Restore and Protect Your Critical Assets

Our team is ready to review the specific requirements of your project. Whether you need to ensure regulatory compliance, maximize the lifespan of a large-scale fabrication, or solve a complex surface treatment challenge, we have the expertise and capacity to deliver.