ASTM B861 Gr12 Ti-0.3Mo-0.8Ni Titanium Tube for aerospace components
Oct 22, 2025
GNEE can provide the form
Introduction of ASTM B861 Gr12 titanium tube:
Gr12 Titanium (Ti-0.3Mo-0.8Ni) Titanium alloy is a corrosion-resistant titanium alloy, a near-alpha alloy developed to improve the crevice corrosion performance of pure titanium. The alloy is strengthened, and it has good crevice corrosion resistance to high temperature, low pH chloride or weakly reducing acid, and its corrosion resistance is significantly better than pure titanium and close to Gr9 alloy. Gr12 alloy also has good process plasticity and welding performance, and has been widely used in the chemical industry. The alloy can be used in the annealed state.
Grade 12 Titanium Alloy Overview:
Composition: Grade 12 titanium, also known as Ti-0.3-Mo-0.8Ni, contains titanium as the base metal with significant additions of molybdenum (Mo) and nickel (Ni). This alloy is notable for its excellent corrosion resistance in reducing and mildly oxidizing environments.
Properties: Grade 12 titanium exhibits good weldability, formability, and fabricability, along with high strength and toughness. It is often chosen for applications where corrosion resistance, moderate strength, and formability are essential.
ASTM B861 Specifications for Grade 12 Titanium Tube:
Scope: ASTM B861 specifies seamless and welded titanium tubes for general corrosion-resisting and elevated-temperature services.
Dimensions and Tolerances: The standard covers tubes in various sizes, wall thicknesses, and lengths. It specifies dimensional tolerances to ensure consistency and compatibility with fittings and other components.
Manufacturing Process: Tubes covered by ASTM B861 can be produced through seamless or welded methods. Seamless tubes are typically made by extrusion or rotary piercing, while welded tubes are manufactured by either welding strip or plate, followed by cold-working and annealing as necessary.
Used:chemical industry
Wall thickness:1.0mm to 10.0mm Length:6000mm
Outside Diameters:21.3mm to 609.6mm
Wall thickness tolerance: +/- 12.5%
Length tolerance: +5mm
Applications of Grade 12 Titanium Tube:
Chemical Processing: Grade 12 titanium tubes are used in chemical processing industries for handling corrosive chemicals and acids due to their superior corrosion resistance.
Heat Exchangers: These tubes are employed in heat exchanger systems where resistance to corrosion and thermal stability are critical.
Aerospace and Marine Applications: Grade 12 titanium's combination of strength, corrosion resistance, and lightweight properties makes it suitable for aerospace components and marine applications.
Medical Devices: It is also used in medical applications such as surgical implants and prosthetic devices due to its biocompatibility and corrosion resistance in bodily fluids.
Product Chemical requirements:
| N | C | H | Fe | O | Al | V | Pd | Mo | Ni | Ti | |
| Gr12 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | / | / | / | 0.2~0.4 | 0.6~0.9 | bal |
Tensile requirements:
| Grade | Tensile strength(min) | Yield strength(min) | Elongation(%) | ||
| ksi | M Pa | ksi | M Pa | ||
| 12 | 70 | 438 | 50 | 345 | 18 |
Products provided by GNEE
| Main Product | Common Grades (ASTM) | Standard Specifications | Common Surface Treatment |
|---|---|---|---|
| Titanium Tube (Seamless & Welded) |
Gr1, Gr2, Gr3, Gr7, Gr9, Gr12 | OD: 3mm - 150 mm Wall Thickness: 0.5mm - 10 mm Length: Up to 6000 mm (customizable) Standards: ASTM B337, ASTM B338 |
• Polished (Mirror / Satin) • Pickled • Annealed • Sandblasted |
| Titanium Sheet/Plate (Cold Rolled / Hot Rolled) |
Gr1, Gr2, Gr5 (Ti-6Al-4V), Gr7, Gr9, Gr12 | Thickness: 0.1mm - 50 mm Width: 500mm - 1500 mm Length: 1000mm - 3000 mm Standards: ASTM B265 |
• Polished (No.4, BA, Mirror) • Pickled • Annealed • Sandblasted • Brushed |
| Titanium Wire | Gr1, Gr2, Gr5, Gr7 | Diameter: 0.1mm - 6.0 mm Form: Coil, Straight Length Standards: ASTM B863, F67, F136 |
• Annealed & Pickled • Bright (Clean) • Oxidized |
| Titanium Bar/Rod (Round, Hex, Square) |
Gr1, Gr2, Gr5 (Ti-6Al-4V), Gr7, Gr9, Gr12 | Diameter (Round): 3mm - 200 mm Hex/Square Size: 4mm - 100 mm Length: 1000mm - 3000 mm (or cut-to-size) Standards: ASTM B348 |
• Turned / Peeled • Polished (Centerless Ground) • Annealed • Black Oxide |
| Titanium Foil | Gr1, Gr2,Gr5 (Ti-6Al-4V), Gr7, Gr9, Gr12 | Thickness: 0.03mm - 0.1 mm Width: 50mm - 500 mm Standards: ASTM B265 |
• Bright Annealed (BA) • Cold Rolled |
| Titanium CNC Machining Parts | Gr1, Gr2, Gr5 (Ti-6Al-4V), Gr7, Gr9, Gr12 | Capability: Custom components based on customer drawings. Processes: Milling, Turning, Drilling, Tapping, etc. |
• As-Machined • Deburred • Polished / Tumbled • Anodizing (Color, Black) • Sandblasted • Passivation |
