ASTM B338 Grade 12 Ti 0.3 Mo 0.8 Ni (UNS R53400) for Heat exchangers
Oct 21, 2025 ASTM-B338-Titanium.pdf
GNEE can provide the form
Products Description
Titanium mixed with other chemical elements such as molybdenum, aluminum, nickel, and zirconium produces a wide range of titanium alloys.
Grade 12 Ti 0.3 Mo 0.8 Ni is a commercially pure wrought alloy. This alloy has excellent strength at high temperatures coupled with excellent weldability and crevice corrosion resistance.
Chemical Composition
| Element | Content (%) |
|---|---|
| Nickel, Ni | 0.6 - 0.9 |
| Iron, Fe | 0.3 max |
| Molybdenum, Mo | 0.2 - 0.4 |
| Oxygen, O | 0.25 max |
| Carbon, C | 0.08 max |
| Nitrogen, N | 0.03 max |
| Hydrogen, H | 0.015 max |
| Titanium, Ti | Remainder |
Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 4.50 g/cm3 | 0.163 lb/in3 |
| Melting point | ≤ 1660°C | ≤ 3020°F |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 550 MPa | 79800 psi |
| Yield strength | 380 MPa | 55100 psi |
| Poisson's ratio | 0.37 | 0.37 |
| Elastic modulus | 105 GPa | 15200 ksi |
| Shear modulus | 45.0GPa | 6530 ksi |
| Elongation at break | 12 % | 12 % |
| Hardness, Brinell | 180 - 235 | 180 - 235 |
| Hardness, Knoop | 222 | 222 |
| Hardness, Rockwell C | 11 | 11 |
| Hardness, Vickers | 209 | 209 |
Thermal Properties
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@0.000-100°C/32-212°F) | 8.60 µm/m°C | 4.78 µin/in°F |
| Thermal conductivity | 19 W/mK | 132 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to grade 12 Ti 0.3 Mo 0.8 Ni alloy are as follows:
ASTM B265 (12)
ASTM B337 (12)
ASTM B338 (12)
ASTM B348 (12)
ASTM B381 (F-12)
Fabrication and Heat Treatment
Machinability
Grade 12 Ti 0.3 Mo 0.8 Ni alloy can be machined using slow speeds, right quantity of coolant flow and high feed rates. High-speed tools should be used for tooling this alloy and the recommended tool types are tungsten carbide designations C1-C4 or cobalt based.
Forming
Grade 12 Ti 0.3 Mo 0.8 Ni alloy can be hot or cold formed.
Welding
Weldabilty of grade 12 Ti 0.3 Mo 0.8 Ni alloy is rated as excellent.
Annealing
For annealing grade 12 Ti 0.3 Mo 0.8 Ni alloy, the material has to be heated to 732-816°C (1350-1500°F), held for 2 h followed by air cooling. In case of intermediate stress relieving, the material has to be heated to 538-649°C (1000-1200°F) and held for 1 h followed by air cooling.
Forging
Rough forging can be performed at 871°C (1600°F) and completed at 788-843°C (1450-1550°F)
Hot Working
Hot working enhances the overall ductility of the material.
Cold Working
Cold working features of this material is same as that of austenitic stainless steel. Post-work annealing is recommended to re-attain favorable performance properties.
Applications
Grade 12 Ti 0.3 Mo 0.8 Ni alloy is used in the following application areas:
Pumps
Valves
Heat exchangers
Pipes and fittings
Chemical processing
In high temperature chemical manufacturing equipment
Marine and airframe components
In medium reducing or variable oxidizing-reducing media - containers
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 |
