STAINLESS STEEL FABRICATION SERVICES
Stainless steel fabrication demands specialized welding procedures, contamination controls, and material-specific handling. JMC Fabrication delivers NAVSEA and AWS certified stainless steel work for marine, oil and gas, and specialty industrial applications — with the documentation to back it up.
Stainless steel's corrosion resistance comes from its chromium content — a minimum of 10.5% chromium forms a passive oxide layer that protects the base metal in aggressive environments. That makes stainless the right choice for:
- Marine saltwater exposure and submerged applications
- Chemical contact and corrosive process streams
- Sour gas and high-chloride oil and gas environments
- NAVSEA and marine specification applications that require it
- Long service life in environments where carbon steel coating would degrade
The cost premium is real — stainless is significantly more expensive than carbon steel in raw material and welding labor. In the right environment, it is the lower-cost option over the life of the asset.
- Pipe spools and process piping assemblies in 304 and 316 stainless
- HVAC and specialty duct for food service and chemical environments
- Custom structural components and specialty assemblies
- Flanges, fittings, and custom stainless configurations
- 304 stainless steel: the most common grade — general corrosion resistance for most applications
- 316 stainless steel: enhanced corrosion resistance through molybdenum addition — the standard for marine and chloride-exposed applications
- Additional grades available on request; contact JMC to confirm for your application
Stainless steel welding requires tighter procedure controls than carbon steel. JMC maintains:
- AWS certified stainless steel welding procedures
- NAVSEA certified welding for marine-specification work
- Material segregation practices to prevent carbon contamination on stainless work
- Documentation packages per project specification, including weld logs and NDE records
- Marine and shipyard piping (NAVSEA certified — saltwater and marine environments)
- Oil and gas (sour service, high-chloride, and offshore installations)
- Chemical and process piping
- Food service and specialty high-purity systems
Specify stainless when: saltwater exposure, chemical service, NAVSEA spec, or long-service-life requirements dictate it. Specify carbon when: structural loads, dry environments, or cost constraints apply. JMC fabricates in both — we can help you make the call.
- October 6, 2026Sheet Metal Gauge Chart: How Thick Is Steel, Galvanized, Stainless, and Aluminum?The same gauge number means a different thickness in steel, galvanized, stainless, and aluminum. A 10 to 26 gauge thickness chart in inches, plus how gauge gets specified for duct and fabricated parts.
- September 24, 2026Which Corrosion-Resistant Alloys Work Best in Marine Applications?A practical comparison of corrosion-resistant alloys for marine environments: 316L and duplex stainless, marine aluminum, copper-nickel, titanium, and galvanized steel, and where each one belongs.
- September 24, 2026Which Stainless Steel Grades Can Be Fabricated and Welded? 304, 316, 420, and 440 ComparedNot every stainless steel welds the same. How 304 and 316 compare with ferritic, duplex, and martensitic grades like 420 and 440, and what to expect when a drawing calls for a hard-to-weld grade.
- September 2, 2026How Much Lighter Is Aluminum Than Steel for Fabrication?Aluminum weighs roughly a third of steel for the same volume. What that actually means for a fabrication project, and when the weight difference is worth the higher material cost.
- September 2, 2026What Is an MTR? Material Test Reports and CMTRs ExplainedAn MTR is the mill's certified record of a material's chemistry and mechanical properties, tied to a heat number. Here's what's actually in one, and when a project needs full heat-level traceability versus a basic mill cert.
- August 19, 2026Pipe Spool Fabrication Tolerances and Quality ChecksWhat dimensional tolerances matter on a fabricated pipe spool, the quality checks that happen before it ships, and why a spool that's slightly off can stop a field crew cold.
- August 19, 2026Specialty Weldments: What They Are and When You Need Custom FabricationWhat separates a specialty weldment from a standard fabricated part, when a project actually needs custom weldment fabrication, and what to give a shop to get an accurate quote.
- August 19, 2026Wall and Deck Penetration Fabrication for Marine and Industrial ProjectsHow structural and pipe penetrations are fabricated for marine bulkheads, decks, and industrial walls, what information a fabricator needs, and why fit matters more than it looks.
- August 19, 2026Pump Skid Design and Fabrication: What's Included and How It's BuiltWhat goes into a fabricated pump skid, how the build process works from drawings to delivery, and what to include in an RFQ to get an accurate quote.
- July 13, 2026Stainless Steel Duct for Corrosive and Washdown EnvironmentsWhen galvanized duct is not enough, stainless is the right call. Grade selection, finish, welding, and cost tradeoffs for corrosive and washdown duct.
- July 8, 2026Galvanized vs. Stainless Steel Duct: Choosing the Right Material for Commercial HVACWhen commercial HVAC duct calls for galvanized and when it needs stainless, covering corrosion, environment, grade selection, and cost.
- July 2, 2026Industrial Exhaust and Dust Collection Duct Fabrication: How It Differs from HVAC DuctWhy industrial exhaust, dust collection, and process ventilation duct is built differently from commercial HVAC duct, and how JMC Fabrication approaches industrial ductwork.
- May 13, 2026Carbon Steel vs. Stainless Steel Fabrication: Choosing the Right Material for Marine and Industrial ApplicationsHow carbon and stainless steel compare on corrosion, weldability, and cost, and how to choose between them for marine, oil and gas, and commercial HVAC fabrication.
- May 8, 2026Spooled Piping vs. Stick-Built Piping: When Each Makes Sense for Your ProjectA practical framework for when shop-fabricated pipe spools beat stick-built field piping, and the scenarios where field assembly is still the right call.
- FabricationHospital and Healthcare Duct FabricationHow healthcare mechanical specifications change duct pressure class, leakage limits, material, and documentation, and how JMC fabricates hospital and lab duct in galvanized and stainless steel.
- FabricationSchool and University Duct FabricationHow the summer install window and public bid documentation shape education duct packages, and how JMC fabricates and stages for K-12 and campus work.
- FabricationShipyard Newbuild and Refit Duct FabricationHow marine duct construction and project mechanics differ between newbuild and refit work, and how JMC fabricates for Gulf Coast shipyards from Pascagoula.
- FabricationRefinery and Plant Turnaround Duct FabricationHow process duct differs from commercial HVAC duct, and how JMC fabricates and stages welded industrial duct against a fixed turnaround window from Pascagoula, MS.
- FabricationMilitary and Federal Duct FabricationHow military and federal specification requirements change duct fabrication, traceability, inspection, and closeout documentation, and how JMC handles that scope from Pascagoula, MS.
- FabricationDuct Fabrication by IndustryHow duct requirements change across commercial, marine, and industrial work, and how JMC Fabrication builds for each from one Gulf Coast shop.
Working on a project that combines services? Explore related capabilities at JMC:
- Carbon Steel FabricationCarbon steel fabrication for pipe spools, HVAC duct, structural components, and custom weldments. ASTM A36, A53, A106. AWS certified welding from Pascagoula, MS.
- Pipe Spool FabricationShop-fabricated pipe spools for oil & gas, marine, and industrial applications. AWS and NAVSEA certified welding from Pascagoula, MS. Carbon and stainless steel.
- Custom Metal FabricationCustom metalwork from concept through delivery — pump skids, penetrations, flanges, subbases, copper assemblies. AWS and NAVSEA certified. 50,000 sq ft shop in Pascagoula, MS.
- All Fabrication ServicesOverview of JMC's full fabrication capabilities, including HVAC duct, pipe spools, and custom metalwork.
What stainless steel grades does JMC Fabrication work with?
JMC works with 304 and 316 stainless steel. 304 covers most general corrosion applications; 316 is preferred for marine, high-chloride, and chemical environments due to its molybdenum content. Contact JMC to confirm availability for specialty grades.
When should I choose stainless steel over carbon steel for fabrication?
Specify stainless steel when the application involves saltwater or marine exposure, chemical contact, sour gas service, or where NAVSEA or food service standards require it. For structural, dry, or cost-constrained applications, carbon steel is typically the better choice.
Is JMC Fabrication certified to weld stainless steel for marine applications?
Yes. JMC holds NAVSEA welding certification, which qualifies our welders for stainless steel work on marine and Navy specification projects. We also maintain AWS welding certification.
Does JMC maintain material segregation for stainless steel fabrication?
Yes. JMC follows material segregation practices for stainless work to prevent carbon contamination — a key quality requirement for buyers who need clean stainless welds.