Seawater piping, pumps and strainers
Review flange studs, bolts and nuts, plus pump, valve and strainer cover fasteners against the equipment drawing, pressure duty and any OEM or class approval requirements.
Marine & offshore
Titanium fasteners and parts for marine and offshore projects
Marine and offshore maintenance can combine saltwater exposure, splash and spray, difficult access, vibration and mixed-material assemblies. Titanium fasteners are often considered where carbon steel or stainless hardware needs repeated replacement. A useful sourcing review still begins with the actual component and duty, not a broad claim that one material suits every location.
Applications / 01
Marine applications to review for titanium fasteners
These application areas can involve seawater exposure or difficult maintenance access. They are starting points for engineering review; any titanium replacement must meet the equipment specification and required approvals.
Coolers and heat exchangers
Fasteners, tie rods and small machined parts for seawater coolers with titanium-wetted surfaces, where the equipment designer has specified titanium hardware.
Topside and splash-zone hardware
Ladder, handrail, hatch, enclosure and instrument-bracket fixings can require review where corrosion makes maintenance difficult. Confirm loads, mating materials and the approved replacement specification.
Engineering checks
Grade selection and four checks before you specify titanium
Grade 2 is our commercial sourcing focus; Grade 5 is reviewed when specified. The comparison below frames the sourcing conversation; it is not a material approval. The checks that follow belong in the specification and remain the responsibility of the qualified project engineering team.
On a small screen, swipe or scroll sideways to view all columns.
| Aspect | Grade 2 | Grade 5 |
|---|---|---|
| Material | Commercially pure titanium | Ti-6Al-4V alloy |
| Strength | Lower; suits moderately loaded joints where the design allows | Substantially higher; chosen when the joint calculation needs it |
| Typical marine enquiry | Corrosion-driven replacement of seawater and topside hardware | Specified higher-strength bolting |
| Our sourcing route | Primary commercial focus | Reviewed when the drawing or specification calls for it |
Some specifications call for palladium- or nickel-molybdenum-alloyed grades, such as Grade 7 or Grade 12, for severe crevice conditions. Name the grade in the RFQ and we confirm whether a supply route is available.
On a small screen, swipe or scroll sideways to view all columns.
| Check | Why it matters | What to tell us |
|---|---|---|
| Galvanic contact | Titanium coupled to carbon steel or aluminium in seawater can accelerate corrosion of the less noble metal, especially when its exposed area is small relative to titanium. | Every mating material, the coating system and any specified insulating washers or sleeves. |
| Crevices and temperature | Unalloyed titanium resists general seawater corrosion, but tight crevices such as gasketed joints can be susceptible in severe conditions, particularly at elevated temperature. | Gasket or joint type, operating temperature, and whether the specification names an alternative grade. |
| Cathodic protection | Cathodic polarization can lead to hydrogen uptake in titanium. The risk depends on alloy, potential, temperature, water chemistry and surface condition. | Whether the hardware connects to a protected structure, the design potential and reference electrode, and any project-specified isolation or coating. |
| Thread galling | Titanium threads can gall during assembly. Mating materials, surface condition and lubrication affect the joint; use the project-approved installation procedure. | Thread form, any specified coating or anti-seize, and the installation procedure owner. |
Technical background: TIMET corrosion manual (PDF); TIMET design and fabrication handbook (PDF); Lunde, Nyborg & Wilhelmsen: offshore hydrogen-absorption study (PDF).
For a deeper comparison, read the Grade 2 vs Grade 5 titanium fasteners guide. For assembly considerations, see titanium fasteners for seawater applications.
Supply boundary
Civil-use sourcing scope
Our sourcing scope is civil-use external fixings and approved drawing-based small parts. Process-wetted pump and valve components, heat-exchanger tubes or plates, and reactor or agitator internals are outside our advertised supply scope. The actual part, destination, end user and end use must be reviewed before order acceptance; an external fastener is not automatically exempt from export controls.
Read our civil-use and export scope before preparing an enquiry.
Scope / 02
Marine & offshore RFQ framework
Use this page to prepare the sourcing conversation. Material selection and final design suitability remain the responsibility of the qualified project team and applicable specification.
Maintenance reality
Define whether the item is a planned replacement, shutdown requirement, repair package or new assembly, and the date it must be on site.
Mechanical duty
State loads, thread size and engagement, locking method and the applicable fastener standard or drawing requirements.
Material interfaces
Tell us which materials the titanium item will contact so the engineering team can assess the assembly and any isolation parts.
Service exposure
Say whether the item is submerged, in the splash zone or topside, with seawater temperature and any chlorination or process media.
Cathodic protection
State whether the hardware connects to a cathodically protected structure, so isolation or coating can be specified by the project team.
Project documentation
Include marking, certificate, inspection, packing and customer or class approval requirements in the RFQ.
Working note
Documentation and inspection, agreed per RFQ
Depending on the order, we can coordinate material test certificates (MTC / EN 10204 3.1 where applicable), agreed heat or lot traceability, dimensional inspection against your drawing, third-party inspection when your project names an inspector, and a pre-shipment file review so documents match the delivered goods.
We work through the Baoji titanium supply chain and confirm the proposed supplier route and its scope before you commit. Availability, minimum quantity and delivery are stated in the quotation for each requirement. A drawing, BOM line or material specification with quantity, required date, destination and documentation needs is enough for an initial feasibility review; the titanium fastener RFQ checklist lists every field.
Buying questions
Questions for marine and offshore titanium RFQs
Short answers for maintenance buyers, integrators and equipment makers preparing a marine or offshore titanium fastener enquiry.
Are titanium fasteners suitable for every marine or offshore location?
No. Commercially pure titanium is widely associated with seawater corrosion resistance, but each joint still depends on load, temperature, crevices, mating materials and any cathodic protection system. The project engineering team and the governing specification decide suitability; MetalPartSource sources against that approved requirement.
Can titanium bolts accelerate corrosion of a steel or aluminium structure?
Yes, they can. When titanium is electrically connected to a less noble metal such as carbon steel or aluminium in seawater, the less noble metal can corrode faster, especially if its exposed area is small relative to the titanium. The project engineering team should define any isolation, coating and area-ratio requirements. List the mating materials in the RFQ so specified isolation parts can be reviewed within the sourcing scope.
Is Grade 5 a better choice than Grade 2 for offshore bolting?
Not automatically. Grade 5 offers much higher strength, but the joint design, preload, service environment and governing specification determine whether that strength is needed. Grade 2 is our commercial sourcing focus; Grade 5 is reviewed when the drawing or specification calls for it.
Which documents can be requested for a marine or offshore order?
Material test certificates, including EN 10204 3.1 where applicable, agreed heat or lot traceability, dimensional inspection reports and third-party inspection can be requested in the RFQ. Availability and scope are confirmed for each supply route and order before commitment.
Use the titanium fastener sourcing page for specified hardware, or the custom titanium component page for a machined drawing-based part. Submit either requirement through the RFQ desk.
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