25 mm Titanium Bar (Grade 1)

Name: 25 mm Titanium Bar (Grade 1)
Brand: TOPTITECHS
SKU: TT-4273
Availability: InStock

25 mm titanium bar in Grade 1 (TA1). Corrosion-resistant titanium rod, cut to length, for structural and chemical applications.

Products Specifications

Φ25mm Grade1/TA1 Pure Titanium Bar

Overview

The Φ25mm Grade1/TA1 pure titanium bar is a turned-finish solid titanium round bar that marks the entry point to medium-diameter structural and equipment components. Manufactured from industrial pure Grade 1 titanium (TA1 per GB/T 3620.1, ASTM Grade 1 / UNS R50250) with titanium content exceeding 99.5%, this bar combines uncompromised corrosion resistance with the highest ductility of all commercially pure titanium grades.

Stocked as a turned solid bar in a 3000 mm full length with the option of custom segment cutting, the Φ25mm diameter is the go-to material for marine anti-corrosion brackets, pharmaceutical reactor fittings, MRI non-magnetic instrument frames, and chemical process equipment structural components. The turned surface provides a clean, scale-free finish ready for machining and fabrication, establishing this corrosion resistant titanium rod as a dependable stock material for marine and pharmaceutical plant service.

Material Specification and Chemical Composition

The Φ25mm TA1 pure titanium bar conforms to GB/T 2965 and ASTM B348 for titanium and titanium alloy bars. Chemical composition is strictly maintained within the following limits:

Element	Ti (base)	Fe	O	C	N	H	Other (total)
Requirement	≥99.5%	≤0.15%	≤0.15%	≤0.05%	≤0.03%	≤0.015%	≤0.40%

The fully annealed microstructure consists of equiaxed alpha-phase grains in a hexagonal close-packed arrangement with well-controlled grain size. The exceptionally low interstitial element content ensures maximum plasticity, excellent cryogenic toughness, and the best weldability of the commercially pure titanium grades.

Physical and Mechanical Properties

Property	Value
Density	4.51 g/cm³ (57% of 304 stainless steel weight)
Melting point	1668 °C
Thermal conductivity	17 W/(m·K)
Coefficient of thermal expansion	8.6 × 10⁻⁶ /°C
Magnetic properties	Completely non-magnetic
Hardness	HB 60–70, HV 120–150
Tensile strength (Rm)	≥370 MPa
0.2% proof stress (Rp0.2)	≥250 MPa
Elongation at fracture (δ₅)	≥20%
Reduction of area	≥30%
Low-temperature performance	Retains full ductility at cryogenic temperatures

At Φ25mm diameter, the solid bar provides substantial cross-sectional area for load-bearing structural applications. The turned surface finish ensures consistent diameter, straightness, and freedom from surface defects.

Available Sizes and Bar Categories

Category	Diameter Range	Surface Condition	Typical Applications
Cold-drawn fine bar	3–30 mm	Bright drawn, tight tolerance	Medical, precision shafts, small fasteners
Hot-rolled bar	30–120 mm	Turned / peeled finish	Chemical shafts, marine structural parts
Forged bar	120–200 mm	Machined surface	Heavy spindles, support frameworks

Standard delivery condition: M (annealed). Standard lengths: 1000 mm / 2000 mm / 3000 mm; custom cutting from 50 mm to 6000 mm. Square bar and hexagonal bar profiles available on request.

Corrosion Resistance

The spontaneously regenerating TiO₂ passive oxide film provides exceptional corrosion immunity in aggressive industrial environments:

Excellent resistance: seawater and marine atmospheres (corrosion rate <0.001 mm/year, no pitting or crevice corrosion), chloride-rich brines, nitric acid, acetic acid, citric acid and other organic acids, dilute alkalis at ambient temperature, humid industrial air, hydrogen peroxide, hypochlorite solutions, food-grade and pharmaceutical process media.

Incompatible media (avoid): hydrofluoric acid (HF), hot concentrated hydrochloric acid, dilute sulfuric acid, phosphoric acid, anhydrous dry chlorine gas, hot fuming nitric acid, molten strong alkalis.

Applications of Φ25mm TA1 Titanium Bar

The Φ25mm TA1 pure titanium rod is a practical structural size for medium-duty corrosion-resistant components:

Marine anti-corrosion brackets — structural support brackets, mounting plates, and connection hardware for seawater piping, valve assemblies, heat exchanger frames, and offshore platform ancillary equipment.
Pharmaceutical reactor fittings — agitator shaft extensions, baffle support rods, dip-tube guides, and internal structural components for GMP-compliant pharmaceutical reactors and sterile processing vessels.
MRI non-magnetic instrument frames — structural members, mounting rails, and support frameworks for magnetic resonance imaging equipment and other magnetically sensitive instrumentation where ferromagnetic materials are prohibited.
Chemical process equipment structural parts — vessel internal supports, distributor-tray hardware, demister-pad support grids, and column-internals for distillation, absorption, and stripping towers.
Electrolyser structural components — tie-rods, cell-frame connectors, bus-bar supports, and structural framing members for industrial water electrolysis and chlor-alkali membrane cells.

Fabrication Guidelines

Machining: Use titanium-grade carbide tooling at low speed (20–30 m/min), positive rake geometry, and abundant water-soluble coolant. The soft TA1 alloy demands sharp tools to avoid built-up edge and work hardening.

Cold forming: Excellent — the Φ25mm bar accepts bending, heading, and cold forging. Annealing (670–720 °C) after significant cold work restores full ductility.

Welding: GTAW (TIG) using ER Ti-1 filler wire with full argon shielding of the weld pool, heat-affected zone, and root. Joint integrity and corrosion resistance match the parent bar.

Hot working: 800–900 °C under vacuum or argon protection. Air exposure above 400 °C leads to rapid interstitial contamination; all hot working must be fully inert-shielded.

Annealing: 670–720 °C, 30–120 min, air cool, in vacuum or inert gas atmosphere. Commercially pure titanium exhibits no quench-hardening response.

Grade Selection: TA1 vs TA2

Parameter	TA1 (Grade 1) — this product	TA2 (Grade 2)
Purity / impurity level	Highest purity, lowest interstitials	Moderate impurity content
Tensile strength (Rm)	≥370 MPa	≥400 MPa
Elongation (δ₅)	≥20% — best ductility	≥18%
Cryogenic toughness	Superior	Good
Primary applications	Marine brackets, pharma reactor fittings, MRI frames, chemical equipment internals	General chemical equipment, standard structural parts, fasteners
Cost	Slightly higher	More cost-effective

Key Usage Precautions

Fluorine-containing media: Prohibit any contact with HF or fluoride-bearing fluids; passive film destruction causes severe localized corrosion.
High-temperature processing: Argon or vacuum shielding mandatory above 400 °C; atmospheric gases cause rapid embrittlement.
Hydrogen embrittlement: Control hydrogen levels in stressed structural components; hydrogen can cause delayed cracking in titanium under sustained tensile loads.
Galvanic corrosion: Isolate titanium components electrically from dissimilar metals (carbon steel, aluminium, copper alloys) with non-conductive gaskets or sleeves.
Cutting fluids: Use only chlorine-free water-based coolants; halogenated or sulphur-bearing cutting fluids are strictly forbidden.

Quality, Certification, and Customization

Each Φ25mm TA1 pure titanium bar is delivered with a complete mill test report containing chemical composition, mechanical test results, and dimensional certification, traceable to the originating heat. TOPTITECHS maintains ISO 9001 quality management and provides ultrasonic testing, eddy-current inspection, and hardness certification upon request.

Custom processing: cut-to-length from 50 mm to 6000 mm, chamfered or polished ends, square and hexagonal bar profiles, mirror-polish finish, and medical-grade ASTM F67 documentation. Browse the complete titanium bars & tubes catalogue for all available diameters and titanium grades.