Grade 12 Titanium Rod for Pressure Vessel Components

Grade 12 titanium rod may be considered for parts used in pressure equipment when the material, component design and operating conditions are suitable. A titanium grade or bar certificate alone does not qualify a pressure vessel or establish a safe operating temperature, pressure or service life.

Material and product form

Grade 12 is a titanium alloy containing molybdenum and nickel. ASTM B348/B348M addresses titanium bars and billets, including Grade 12 within its scope. The purchaser should specify the applicable edition, bar dimensions, condition and required chemical and mechanical records. Verify acceptance criteria against the agreed edition rather than assuming values for another form or lot.

A rod may be machined into a component when the approved design permits. Plate, tube, forgings and welding consumables require their own applicable product specifications; the bar specification does not establish compliance for those products.

Pressure and temperature assessment

The vessel designer must establish the applicable construction code, approved material designation, design pressure and temperature, allowable stress, joint design, fabrication controls and inspection. Elevated-temperature properties, creep, thermal cycling and corrosion allowances must be evaluated for the actual duty. Do not infer a vessel rating from room-temperature tensile data or a generic temperature range.

Corrosion and fabrication

Corrosion resistance depends on the complete environment, including temperature, oxidizing conditions, flow, deposits and crevices. Assess proposed service using relevant exposure data or testing; do not assume protection in every acid or chloride mixture. A material selection should also consider hydrogen uptake where relevant.

Welding requires a procedure qualified for the applicable code and joint, suitable cleanliness and shielding. Weld and heat-affected-zone performance depend on the procedure and inspection. Dissimilar-metal joints require their own engineering assessment and qualification.

Frequently asked questions

Does a Grade 12 bar certificate approve the finished vessel?

No. Material acceptance and vessel design, fabrication and inspection are separate requirements.

Can one corrosion rate be used for every service?

No. Corrosion must be assessed for the specified medium, temperature and component conditions.

Explore the titanium rod category or request a quotation with the material specification, dimensions and documentation requirements.