Titanium Seamless Piping Grade 3
Grade 3 titanium pipe - higher-strength commercially pure grade (tensile ≥440 MPa, O ≤0.35%): composition, ASTM B861/ASME SB861, for petrochemical, power and marine service.
Description
What Grade 3 Is
Grade 3 is a commercially pure (CP) titanium grade positioned between Grades 1-2 (softer, more formable) and Grade 4 (strongest CP). Its higher strength comes from a higher oxygen content (maximum 0.35%) - interstitial oxygen strengthens the metal without alloy additions, so Grade 3 keeps the corrosion resistance of unalloyed titanium while carrying more load.
Chemical Composition (ASTM B861, wt % max)
| Element | Grade 3 |
|---|---|
| Ti | Balance |
| O | 0.35 |
| Fe | 0.30 |
| C | 0.08 |
| N | 0.05 |
| H | 0.015 |
Mechanical and Physical Properties
Tensile ≥440 MPa, yield ≥380 MPa, elongation ≥18% (annealed, typical - check the current edition for thickness-dependent values).
Density 4.51 g/cm3; melting point ~1668°C; elastic modulus ~105-120 GPa.
Corrosion Resistance and Fabrication
Excellent resistance to acids, alkalis and salt solutions - the self-healing TiO2 film provides durable protection in marine and chemical environments.
Formability: hot rolling, cold rolling, drawing and bending into various diameters and shapes.
Weldability: good, with standard titanium practice - full inert-gas shielding on both sides, clean surfaces, low heat input.
First-class titanium production technology
Specifications
Standards: ASTM B861 (seamless pipe), B338 (heat exchanger tube), B862 (welded pipe); ASME SB861/SB338/SB862. (Note: B388 is not a valid ASTM designation.)
Pipe range: 1/2" to 24" NB, SCH 10 to SCH XXS; tube range 1-254 mm OD, wall 0.1-20 mm.
Forms: round, square, rectangular, oval, hydraulic; ends: plain, beveled, threaded; lengths: single random, double random or required.
Surface: polished, sandblasted, pickled per requirement.
Applications
Petrochemical: distillation towers, heat exchangers and piping resisting corrosive media.
Power generation: condenser cooling tubes - corrosion and scaling resistance in circulating cooling water.
Aerospace: structural components and fasteners where strength-to-weight matters (not turbine hot sections).
Marine and offshore: seawater systems and structures.
Automotive: high-performance components such as exhaust systems and connecting rods.
Selection Note
Choose Grade 3 when you need more strength than Grades 1-2 with better formability than Grade 4. For higher strength still, use Grade 5 (Ti-6Al-4V) or Grade 23; for aggressive reducing-acid or crevice service, use the palladium grades (Gr.7/16/17). Confirm the current standard edition for exact values before specification.
Large-scale factory production of Titanium Products
About Us
GNEE came into existence in 2008 and has since then accumulated 16 years of expertise in foreign trade export. Our product lineup chiefly comprises titanium tubes, rods, wires, foils, sheets, along with parts in diverse specifications. By collaborating with numerous renowned factories, we are well - equipped to supply you with substantial volumes of top - quality metals and customized items. Currently, our workforce numbers up to 200 employees, and we anticipate further growth down the line. Every one of our team members is dedicated to furnishing you with superior products and services. We are dedicated to offering you the finest products and services. Additionally, we will offer more competitive pricing and safe, rapid transportation options. GNEE is a reliable entity. We sincerely look forward to collaborating with you.
Trustworthy Team
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