Stainless Steel Fabrication and Precision Machining in Rome, GA

Type 304 stainless -- 18 percent chromium, 8 percent nickel -- is the most prevalent stainless grade running through Rome's fabrication shops. Its combination of atmospheric corrosion resistance, clean TIG weldability, and reasonable machinability makes it the standard spec for structural brackets, enclosure panels, fluid reservoirs, and equipment housings that need to outlast mild chemical and moisture exposure without the cost premium of higher alloys. Rome shops process 304 in plate from 1/8 inch through 2 inches, sheet down to 0.030 inch, and round bar up to 6 inches diameter. Welding 304 with ER308L filler wire is routine practice for structural applications, and shops follow AWS D1.6 Structural Welding Code for Stainless Steel when work falls under code-required programs. Post-weld pickling and passivation per ASTM A967 or AMS 2700 restores the chromium-oxide passive layer disrupted by heat input, which is a non-negotiable step for components going into wet or chemically active service. Several Rome shops maintain passivation tanks in-house, eliminating the subcontracting round-trip that adds days to lead time. For buyers at construction equipment OEMs specifying 304 housings or 304 hydraulic tank components, Rome's fabricators can deliver welded and passivated assemblies with full weld maps, material certifications to ASTM A240 for plate or A276 for bar, and dimensional inspection reports. First-article inspection capability using CMM equipment is available from the higher-tier shops in the area.

When a Rome customer's application involves chloride exposure -- coastal equipment, chemical wash-down environments, or process fluid contact -- 316L is the specification call. The 2-3 percent molybdenum addition to 316L raises pitting resistance equivalent (PREN) to approximately 24-26 compared to 304's 18-20, providing meaningful resistance to chloride-induced pitting at operating temperatures up to 140 degrees Fahrenheit in dilute chloride solutions. The L (low-carbon) designation keeps carbon below 0.03 percent, eliminating sensitization risk during welding and enabling weld zones to pass intergranular corrosion testing per ASTM A262 Practice E. Rome shops machine 316L extensively for hydraulic fittings, valve bodies, pump housings, and fluid manifolds where corrosion failure would contaminate process fluids or cause equipment downtime. The alloy is notoriously work-hardenous -- cutting speeds run 20-30 percent slower than 304, and rigid setups with sharp positive-rake inserts are essential to avoid work-hardening the surface ahead of the tool. Shops here have dialed in feeds-and-speeds for 316L: typically 200-250 SFM with carbide inserts on turning operations and 0.003-0.005 inch per tooth on 2-flute end mills for finish passes. For buyers sourcing 316L weldments, Rome fabricators can supply orbital TIG welding for tube and pipe assemblies, full-penetration groove welds on pressure-retaining parts, and hydrostatic leak testing at 1.5x design pressure. Certification packages include EN 10204 3.1 material test reports when requested by European supply chains.

When stainless steel needs to carry structural load at stress levels that austenitic grades cannot sustain, Rome shops turn to 17-4PH (UNS S17400). In Condition H900 -- age hardened at 900 degrees Fahrenheit -- 17-4PH delivers 170 ksi yield strength and 185 ksi ultimate tensile strength while retaining corrosion resistance comparable to 304. This combination makes it the spec of choice for shafts, pins, high-load fasteners, and structural connectors in heavy-equipment applications where both strength and corrosion resistance are non-negotiable. Machining 17-4PH in the annealed (Condition A) state before final age hardening is the standard approach for complex parts: rough machine, rough grind if needed, then age to H900 or H1025 as the design requires, then finish grind or hard-turn to final dimensions. Rome shops with cylindrical grinding capability can hold plus or minus 0.0001 inch on shaft diameters after age hardening, which matters for press-fit and precision-clearance fits. Hard turning of 17-4PH to 40-45 HRC is within the capability of shops running CBN tooling. Custom fabrication with 17-4PH requires attention to welding -- the grade is weldable but requires post-weld aging to restore mechanical properties in the heat-affected zone. Rome shops familiar with aerospace and defense work understand the full sequence: weld with ER630 filler, solution anneal the assembly, then age to the specified condition. For buyers without that requirement, H900 or H1025 condition bar stock machined to final dimensions without welding is the cleanest path.