Gr12 Ti-0.3Mo-0.8Ni Titanium Sheet
Designated as UNS R53400, titanium grade 12 has the nominal composition of Ti-0.3Mo-0.8Ni. It’s a titanium alloy that may be treated as unalloyed titanium (commercially pure titanium) with minor traces of alloying contents.
Description
Grade 12 titanium mixes a good mechanical and corrosion resistance against cracks. This metal is well known for its good weldability.
What is Titanium Grade 12?
Titanium Grade 12 0.8NI-0.3MO is a commercially pure wrought Titanium alloy. Grade 12 demonstrates excellent strength at high temperatures, excellent weldability, and crevice corrosion resistance. This material is similar to Titanium Grade 2 and Grade 3 with the addition of molybdenum and nickel, which offers enhanced corrosion resistance. Grade 12 can be hot or cold formed using press brake forming, hydropress forming, stretch forming or drop hammer method. This materials ability to be formed in a various of ways makes Grade 12 useful in numerous applications.
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Chemical Composition
| CHEMICAL COMPOSITION | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| C 0.08% Max | N 0.03% Max | O 0.25% Max | H 0.15% Max | Ni 0.60- 0.90% | |||||
| Fe 30% Max | Ti Remainder | ||||||||
Physical Properties
| PHYSICAL PROPERTIES | ||||||
|---|---|---|---|---|---|---|
| Density | Electrical conductivity (% IACS) | Thermal conductivity (BTU-in/hr-ft²-°F) | Specific heat (BTU/lb-°F) | Thermal expansion (1/°F) | Melting Point (°F) | |
| 0.163 | – | 11 | 0.13 | 0.00000530 | – | |
Specifications and Standards
| Standard | Title | Application |
|---|---|---|
| ASTM B265 | Standard Specification for Titanium and Titanium Alloy Strip, Sheet, and Plate | Industrial, commercial, general purpose |
| ASME SB-265 | ASME Boiler & Pressure Vessel Code version | Pressure vessel applications |
| ASTM B338 | Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchangers | Tube form (sheet for tube sheets) |
| ASTM B861 / B862 | Seamless / Welded Titanium Pipe | Pipe form |
| ISO 5832-11 | Implants for Surgery - Metallic Materials - Part 11 | Medical (limited, not primary) |
Applications
Chemical Processing: Ideal for equipment handling hot, highly acidic, or chloride-rich media, such as heat exchangers, reactors, and piping systems.
Power Generation: Utilized in power plant components, especially those exposed to high-temperature corrosive environments.
Marine Environments: Suitable for marine applications due to its resistance to seawater corrosion, including ballast water systems and offshore oil and gas production.
Desalination Plants: Employed in desalination equipment where high resistance to brine and chlorides is essential.
Aerospace: Used in aircraft components requiring high corrosion resistance.
FAQ
What exactly is Titanium Grade 12?
A: Grade 12 titanium (UNS R53400) is a commercially pure titanium derivative alloy containing 0.3% molybdenum and 0.8% nickel. It is specifically engineered to bridge the performance gap between standard Grade 2 and palladium-stabilized premium grades like Grade 7. It offers 40% higher strength than Grade 2, superior elevated temperature performance, and significantly better corrosion resistance in reducing acids and crevice conditions - all at a moderate cost premium of 30–50%.
What specifications cover Grade 12 titanium sheet and plate?
A: The primary specifications are:
ASTM B265 / ASME SB-265 - Sheet, strip, and plate
ASTM B338 - Seamless and welded tube (condenser/heat exchanger)
ASTM B861 / B862 - Seamless and welded pipe
ISO 5832-11 - Medical applications (limited)
Is Grade 12 suitable for flue gas desulfurization (FGD) service?
A: Yes. Grade 12 has an excellent track record in FGD scrubbers, outlet ducting, and stack liners. It offers significantly better crevice corrosion resistance than Grade 2 in acidic chloride condensates at a substantially lower cost than Grade 7.
What environments is Grade 12 NOT suitable for?
A:
Concentrated reducing acids (>5% HCl, >10% H₂SO₄) - use Grade 7, zirconium, or tantalum
Hydrofluoric acid (HF) - attacks all titanium grades
Fluoride-containing media - even trace amounts cause corrosion
Strongly oxidizing alkaline brines (>80°C, high pH, chlorides) - stress corrosion cracking risk
Nitric acid - Grade 12 works, but Grade 2 is equally good and cheaper
Is Grade 12 ASME Code approved for elevated temperature?
A: Yes. Grade 12 is recognized in ASME Section VIII Division 1 and ASME B31.3 piping code with higher allowable stresses than Grade 2 at all temperatures. This allows for thinner wall sections and material savings.
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