🚀 TITANIUM
Titanium Machining and Fabrication in Baton Rouge, LA — Grade 2, Grade 5 Ti-6Al-4V & Grade 23
Titanium occupies a narrow but critical niche in Baton Rouge's industrial material palette. Where the chlorinated process streams at Shintech, Olin, and similar chlor-alkali and vinyl chloride monomer facilities would destroy 316L stainless in months and attack even Hastelloy under certain oxidizing conditions, commercially pure titanium (ASTM Grade 2) provides corrosion rates measured in single-digit mils per year. Locally, titanium fabrication demand is driven by heat exchanger re-tubing, specialty pump wetted-end components, and replacement vessel liners — work that requires shops experienced in titanium's unique machining and welding characteristics.
ISO 9001ASMEITAR
Grade 2 Commercially Pure Titanium in Chemical Process Equipment
ASTM Grade 2 (UNS R50400) commercially pure titanium is the standard material for Baton Rouge chemical process applications requiring maximum corrosion resistance. With minimum tensile strength of 50,000 psi and yield of 40,000 psi, Grade 2 is not a structural material — it is chosen purely for corrosion performance in environments that defeat all conventional engineering alloys. The native TiO2 passive film on titanium is thermodynamically stable in oxidizing media, wet chlorine, chloride solutions to boiling, nitric acid, and most organic acids encountered in chemical plant process streams.
Heat exchanger re-tubing is the most common Grade 2 titanium application at Baton Rouge chemical facilities. Titanium tubes per ASTM B338 Grade 2 replace corroded admiralty brass, 90/10 copper-nickel, or even 316L stainless tubes in cooling water exchangers and process condensers where cooling tower water chlorides or process side chemistry has caused tube failures. Typical tube ODs range from 0.625" through 1.250" with wall thicknesses of 0.035"–0.065". Tube-to-tubesheet joining uses either roller expansion or combination expand-plus-weld, with ASME Section IX qualified GTAW procedures using commercially pure titanium filler (ERTi-2) in a shielded argon purge environment.
Welding titanium requires rigorous atmospheric exclusion — oxygen and nitrogen contamination above approximately 0.3% during solidification produces embrittled, gold-to-gray-to-white discolored welds that fail bend tests and cannot be used in service. Qualified Baton Rouge titanium welding shops use trailing shields and back-purge mandrels on tube work, with argon purge flow maintained at 15–25 CFH and weld color monitored to ensure bright silver appearance (acceptable) versus straw, gold, or dark colors (reject). Shops without titanium-specific weld procedures and purge equipment should not be sourced for Grade 2 titanium work regardless of their stainless steel capabilities.
Grade 5 Ti-6Al-4V for High-Strength Structural and Mechanical Applications
Ti-6Al-4V (Grade 5, UNS R56400) is the alpha-beta titanium alloy that dominates high-strength titanium applications. In the annealed condition, it delivers 130,000 psi tensile and 120,000 psi yield at roughly 55% of the density of steel — a specific strength advantage that makes it compelling for Baton Rouge applications where weight reduction is valued alongside corrosion resistance. While the aerospace sector drives the majority of Ti-6Al-4V demand globally, Baton Rouge applications include high-pressure pump shafts and impellers in corrosive process services, valve bodies and trim for aggressive chemical service, and fasteners and flanges in titanium piping systems where galvanic compatibility with Grade 2 titanium wetted surfaces is required.
CNC machining of Ti-6Al-4V is significantly more demanding than stainless steel or even Inconel in certain respects. Titanium's low thermal conductivity (approximately 7 BTU/hr·ft·°F versus 9 for 316L and 26 for carbon steel) concentrates heat at the cutting edge rather than conducting it away in the chip, causing rapid tool wear if cutting parameters are not properly managed. Baton Rouge shops experienced in titanium maintain sharp carbide insert geometries, run lower surface speeds (100–250 SFM for rough turning, 150–300 SFM for milling), use flood coolant at high flow rates (8–15 GPM), and keep chip loads sufficient to avoid the rubbing that generates excessive heat. Coated carbide (TiAlN coating) and uncoated fine-grain carbide both perform well; TiN-coated inserts should be avoided as the coating's titanium affinity promotes built-up edge.
Tolerance achievement in Ti-6Al-4V is generally good once proper cutting parameters are established: ±0.002" on turned ODs and bores is routine, with precision grinding of sealing surfaces and bearing journals achievable to ±0.0005". The material's low elastic modulus (approximately 16 Msi versus 29 Msi for steel) means thin-wall parts and long slender shafts require careful fixturing and support to prevent deflection-driven dimensional error during machining.
Frequently Asked Questions
Several chemical processes in the Baton Rouge industrial corridor involve chlorine chemistry — wet chlorine gas, chlorinated organics, hydrochloric acid, or high-chloride process streams — where austenitic stainless steel (304, 316L) fails by pitting and crevice corrosion within months of installation regardless of grade or surface finish. Even higher nickel alloys like Hastelloy C-276 have finite corrosion rates in concentrated oxidizing chloride environments. Commercially pure titanium (Grade 2) is resistant to all concentrations of wet chlorine below approximately 160°F, all concentrations of chloride brine, and most organic chlorinated compounds because TiO2 spontaneously reforms when damaged and is thermodynamically stable in oxidizing media. In heat exchangers at Shintech's Plaquemine PVC facility and Olin's St. Gabriel chlor-alkali plant (both within the Baton Rouge industrial region), titanium tube bundles routinely achieve 15–25 year service lives in cooling water exchangers where 316L tubes failed in 2–3 years. The initial cost premium (titanium tubes are 8–15x the cost of 316L per pound) is recovered within the first replacement cycle avoided.
Titanium and stainless steel are both demanding to machine, but for different reasons. Stainless steel (316L) work-hardens rapidly and requires consistent chip loads to avoid rubbing the work-hardened surface. Titanium's main machining challenge is thermal management — its very low thermal conductivity (about 7 BTU/hr·ft·°F) keeps heat concentrated at the tool tip rather than dissipating through the chip, causing rapid tool edge breakdown at surface speeds that would be entirely acceptable for stainless. Titanium also has a strong tendency to gall and weld to cutting tools at elevated temperatures (built-up edge). Practical differences: titanium requires cutting speeds 30–50% lower than equivalent stainless operations, demands sharp un-worn tool edges (dull inserts must be changed immediately, not run to typical stainless wear limits), and needs aggressive flood coolant (high flow, not just high pressure) to carry heat away. Titanium also has high spring-back (low elastic modulus) requiring proper support for thin sections and tight tolerances. For a Baton Rouge shop new to titanium, the first production run should include extra time for process development — the tool wear patterns, cutting parameter sweet spots, and chip formation behavior are noticeably different from stainless.
Yes — titanium welding requires atmospheric shielding beyond what standard stainless steel TIG setups provide. Titanium oxidizes at temperatures above approximately 800°F, and oxygen or nitrogen contamination in the weld pool or heat-affected zone causes embrittlement (measured by bend testing per ASTM B265 or AMS 4928 acceptance criteria). Standard stainless TIG welding with a gas lens and back-purge is necessary but not always sufficient for titanium. Proper titanium welding requires: a trailing shield that covers the weld and HAZ until the metal cools below 800°F (typically a 6–12" long argon shield fixture), internal back-purge for tube and pipe work with argon flow maintained until complete cooling, weld enclosure boxes or glove boxes for the highest-quality work (used for Grade 23 medical components), and pure argon shielding gas with dew point below -50°F (not standard welding-grade argon without specification). Shops that fabricate titanium pressure vessels for ASME service also need qualified GTAW WPS/PQR packages specifically for the titanium grade being welded — stainless steel procedures do not transfer. Baton Rouge shops with offshore or chemical plant titanium experience typically have these capabilities; general steel shops almost never do.
As of recent market conditions, commercially pure Grade 2 titanium sheet and plate typically prices between $15–25 per pound in small quantities, compared to $5–9 per pound for 316L stainless and $25–60 per pound for Hastelloy C-276. Grade 5 Ti-6Al-4V runs $20–35 per pound due to the alloying additions and tighter processing requirements. On a weight basis, titanium appears expensive relative to 316L. However, titanium's density is approximately 60% of stainless steel, so the same volume of material weighs less — a direct comparison should be made on a per-volume or per-component basis, not per-pound. For heat exchanger tubing specifically, titanium tube costs are offset by elimination of re-tubing cycles: if titanium tubes last 20 years versus 3-year cycles for 316L, the break-even is typically reached within one avoided replacement. Fabrication labor for titanium runs 20–40% higher than equivalent stainless work due to slower cutting speeds, more frequent tool changes, and atmospheric weld shielding requirements. Total installed cost for a titanium heat exchanger bundle versus 316L is typically 3–6x, but lifecycle cost over 20 years in aggressive service can favor titanium significantly.
For pressure-containing titanium components under ASME Section VIII, the fabricator must hold an active ASME U-stamp and maintain qualified GTAW weld procedure specifications (WPS) and procedure qualification records (PQR) specifically for the titanium grade and thickness range being fabricated. ASME Section IX requires separate PQR qualification for each P-number group — titanium alloys fall under P-51 through P-53, completely separate from stainless steel P-8 qualifications. Material traceability to AMS or ASTM certifications with full chemistry and mechanical test reports is mandatory for any aerospace or high-responsibility industrial application. For Grade 23 medical applications, FDA 21 CFR Part 820 quality system registration and ISO 13485 certification are appropriate. ITAR registration is relevant for any titanium component destined for defense or aerospace applications. For general industrial applications, ISO 9001:2015 and documented titanium welding procedure qualification records are the baseline requirements. Always request a list of previous titanium projects and, if possible, customer references — titanium fabrication experience cannot be faked, and the quality difference between an experienced shop and a shop attempting titanium for the first time is significant.
Last updated: July 2026
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