Titanium Grade 1 vs Grade 2: Difference and Comparison

Titanium Grade 1 and Grade 2 are the best grades of alloy materials due to their lightweight and high strength. Titanium is divided into several grades according to their properties and applications. Commercially pure titanium has four grades, including Grade 1 and Grade 2. Grade 2 titanium is widely used due to its excellent corrosion resistance, good formability, and moderate strength.

Titanium is 45% lighter and has the same strength as steel. Titanium is utilized to make artificial joints, devices for setting or mending bones, and implanted medical equipment because it is also biocompatible.

Titanium Grade 1 is also known as 3.7025 / UNS R50250. It is the softest of the four commercially pure titanium grades, with the maximum formability and corrosion resistance. It can be welded quite well.

Grade 1 titanium is typically used for corrosion resistance in the chemical and marine sectors, as well as in aircraft construction where maximum formability is desired.

Titanium Grade 2, also known as 3.7035 / UNS R50400, has an alpha crystalline structure. Because it combines good formability, moderate strength, and exceptional corrosion resistance, this alloy is widely used.

In oxidizing media, alkaline media, organic acids, aqueous salt solutions, and hot gases, Titanium Grade 2 exhibits exceptional corrosion resistance. Additionally, Grade 2 offers exceptional resistance in seawater applications.

Titanium Grade 2 is the preferable option for surgical applications due to its slightly increased strength. Grade 2 materials can be used for prosthetic rods and pins, dental implants, and surgical instruments due to their higher yield strength and corrosion resistance.

Although Grade 1 and Grade 2 are both widely used due to their availability and affordable prices, selecting the proper grade for your application is very important. Strength, toughness, hardness, tensile strength, yield strength, chemical composition, and physical properties should all be considered.

Q1: What is the main difference between Titanium Grade 1 (3.7025) and Titanium Grade 2 (3.7035)?
A: The main difference is mechanical strength. Grade 2 has higher tensile strength (345 MPa vs 240 MPa) and higher yield strength (276 MPa vs 170-310 MPa). Grade 1 has higher ductility (24% vs 20% elongation), making it more formable. Both have similar corrosion resistance.

Q2: Which is stronger, Titanium Grade 2 (UNS R50400) or Titanium Grade 1 (UNS R50250)?
A: Titanium Grade 2 is stronger. Its tensile strength is 345 MPa minimum, while Grade 1 is 240 MPa minimum. Grade 2 is recommended for high-pressure and high-temperature systems.

Q3: Which titanium grade is more formable, Grade 1 or Grade 2?
A: Titanium Grade 1 is more formable due to its higher elongation (24% vs 20%) and lower strength. It is the softest commercially pure titanium grade and is ideal for deep drawing and complex forming operations.

Q4: Is Titanium Grade 2 (3.7035) more expensive than Titanium Grade 1 (3.7025)?
A: No, Grade 1 is more expensive than Grade 2. Grade 2 is the most widely available titanium grade and is slightly less expensive due to higher production volume and broader industrial use.

Q5: What are the equivalent Chinese standards for Titanium Grade 1 and Grade 2?
A: Titanium Grade 1 is equivalent to Chinese TA1 per GB/T 3620 and GB/T 3625. Titanium Grade 2 is equivalent to Chinese TA2. TA1 is used for heat exchanger tubes requiring maximum formability; TA2 for higher strength applications.

Q6: Can Titanium Grade 1 (UNS R50250) be welded to Titanium Grade 2 (UNS R50400)?
A: Yes, Grade 1 and Grade 2 are fully weldable to each other using GTAW (TIG) or GMAW (MIG) with strict argon shielding. Both are commercially pure alpha titanium alloys with similar weldability characteristics.

Q7: Which titanium grade is better for seawater heat exchangers, Grade 1 or Grade 2?
A: Both grades offer excellent seawater corrosion resistance. Grade 1 is preferred when tube expansion and forming are critical. Grade 2 is preferred for higher pressure applications due to its higher strength. Cost is similar for most heat exchanger designs.

Q8: What is the difference in oxygen content between Titanium Grade 1 (3.7025) and Titanium Grade 2 (3.7035)?
A: Grade 1 has max 0.18% oxygen, while Grade 2 has max 0.25% oxygen. Higher oxygen content in Grade 2 contributes to its higher strength but slightly lower ductility.

Q9: Is Titanium Grade 1 or Grade 2 better for medical implants?
A: Titanium Grade 2 is better for surgical applications such as prosthetic rods, pins, and dental implants due to its higher strength. Grade 1 is used for orthodontic appliances where maximum formability is needed. Both are biocompatible.

Q10: Which grade should I choose for pressure vessel application, Titanium Grade 1 or Grade 2?
A: Titanium Grade 2 is recommended for pressure vessels because it has higher tensile strength (345 MPa vs 240 MPa) and higher yield strength (276 MPa vs 170-310 MPa). Grade 1 is too soft for most pressure vessel codes.

Our titanium products (tubes, plates, bars, wires, and strips) are carefully packed to ensure safe delivery. Each item is individually protected with anti-scratch materials such as foam or plastic film. For plates and strips, we use reinforced wooden crates with inner cushioning. Tubes and bars are packed in strong wooden cases or bundled with rust-proof straps, with plastic caps on both ends to prevent edge damage. Wires are wound on plastic or steel spools and wrapped with moisture-proof paper. All packages are secured with reinforced straps, clearly labeled with product specifications and quantity, and suitable for long-distance sea or air freight. Export-standard fumigated wooden packaging is used to comply with international shipping regulations.

Our factory is equipped with core processing machinery for titanium products. For melting and forming, we use vacuum arc remelting (VAR) furnaces and a 2,500-ton hydraulic press. The billet processing line includes a high-temperature rolling mill and a radial forging machine capable of producing bars and rods from 8mm to 300mm in diameter. For seamless titanium tubes, we operate three-roll piercing mills and cold pilger rolling mills (LG-60, LG-90). Titanium plates and strips are produced on a four-high cold rolling mill with an online annealing furnace. For wires, we have a continuous wire drawing line with in-line degreasing and spooling units. All key equipment is CNC-controlled, ensuring consistent dimensional accuracy and surface finish for tubes, plates, bars, wires, and strips.

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