Products Description
Product Specifications
| Standards | ASTM B337 / ASME SB337 |
| Steel Grades | Grade 1 Grade 2 Grade 3 Grade 7 Grade 9 Grade 10 Grade 11 Grade 12 |
| Equivalent Standards | JIS H4635, GOST 22897, GB/T 3624 |
| Outer Diameter (OD) | 2.5″(63.5 mm), 3″(76.2 mm), 4″(101.6 mm), 12.7 mm – 114 mm(1/2″ – 4.5″) |
| Wall Thickness (WT) | 1.0 mm / 1.2 mm / 1.5 mm, 0.5 mm – 5.0 mm |
| Length | 6/12 m , or customized |
| Surface Treatment | pickling & passivation , polishing, heat coloring (blue, gold, or rainbow), and sandblasting. |
| Production Process | Hot extrusion + cold rolling/cold drawing; Automatic laser welding |
| Condition | Annealed |
2.5 3 4 Titanium exhaust tubing-available in 2.5, 3, and 4-inch diameters-offers a significant weight advantage. Grade 2 titanium has a density of 4.51 g/cm³, compared to approximately 8.0 g/cm³ for 304 stainless steel. Consequently, titanium tubing is about 43% lighter than equivalent 304 stainless steel components, effectively reducing a vehicle's unsprung mass and improving both acceleration and steering response.
Furthermore, titanium and its alloys exhibit excellent high-temperature strength and heat resistance, retaining structural integrity at temperatures up to approximately 800°C. This makes them ideal for use in high-temperature sections, such as the exhaust header (downpipe) or areas located near the catalytic converter or turbocharger outlet.
Customized Services
- Pipe Bending and Custom Configuration: Standard bend angles include 15°, 30°, 45°, 90°, and 180°; non-standard angles can be customized according to your drawings. We also manufacture exhaust components such as Y-pipes, tees, and various front, mid, and tail-section assemblies.
- Dimensional Customization: In addition to standard 2.5, 3, and 4-inch outer diameters, we offer customization for outer diameters ranging from 12.7 mm to 114 mm, with wall thicknesses from 0.5 mm to 5.0 mm.
- Surface Finishing: Options include pickling and passivation, mirror polishing, matte sandblasting, and controlled high-temperature oxidation (resulting in blue, bronze, or iridescent/rainbow finishes).
- Packaging and Marking: Vacuum-sealed moisture-proof packaging; laser marking (including heat number, specifications, ASTM B337 compliance markings, and brand logos).
Chemical Composition
| Grade |
UNS |
Ti |
Al |
V |
Fe |
O |
C |
N |
H |
|---|---|---|---|---|---|---|---|---|---|
|
Grade 1 |
R50250 |
Balance |
- |
- |
≤0.20 |
≤0.18 |
≤0.08 |
≤0.03 |
≤0.015 |
|
Grade 2 |
R50400 |
Balance |
- |
- |
≤0.30 |
≤0.25 |
≤0.08 |
≤0.03 |
≤0.015 |
|
Grade 3 |
R50550 |
Balance |
- |
- |
≤0.30 |
≤0.35 |
≤0.08 |
≤0.05 |
≤0.015 |
|
Grade 9 |
R56320 |
Balance |
2.5–3.5 |
2.0–3.0 |
≤0.25 |
≤0.15 |
≤0.08 |
≤0.03 |
≤0.015 |
Mechanical Properties
| Grade |
UNS |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
|---|---|---|---|---|
|
Grade 1 |
R50250 |
≥240 |
≥170 |
≥24 |
|
Grade 2 |
R50400 |
≥345 |
≥275 |
≥20 |
|
Grade 3 |
R50550 |
≥450 |
≥380 |
≥18 |
|
Grade 9 |
R56320 |
≥620 |
≥483 |
≥15 |
Possible Alternative Grades
- Grade 5 (Ti-6Al-4V) offers the advantage of high strength-significantly exceeding that of Grade 2-making it suitable for components in exhaust systems such as oxygen sensor bosses, flanges, brackets, fasteners, and connectors that require high local rigidity.
- Grade 12 provides superior corrosion resistance compared to Grade 2 in environments that alternate between reducing and oxidizing acids. It also possesses slightly higher strength, making it well-suited for high-corrosion scenarios-such as on racetracks or in coastal areas-where components are subjected to extreme exposure to salt spray or chemicals.
- 304/304L stainless steel serves as an affordable alternative for standard-performance exhaust systems. While it offers good weldability and formability, it is substantially heavier than titanium.
application areas
- Exhaust systems for high-performance gasoline and turbocharged sports cars (downpipes, mid-pipes, and tailpipes)
- Exhaust system modifications for circuit racing, rally racing, and karting
- OEM titanium exhaust systems for supercars
- High-performance titanium exhaust systems for large-displacement motorcycles (utilizing matching pipe diameters)
- High-temperature exhaust piping for dynamometer test benches
- Lightweight exhaust piping for specialized engineering vehicles
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Polishing equipment
Cold drawing equipment
Products Package
FAQ
Q: Can ASTM B337 titanium tubing be used directly for automotive exhaust systems?
A: Yes. ASTM B337 is a standard for titanium alloy piping, and Grade 2 (Gr2) is the most widely used titanium grade for automotive exhaust applications. Supplied in an annealed state, it is well-suited to withstand the vibrations and thermal cycling typical of exhaust systems. We can also provide non-destructive testing (NDT) and material certification.
Q: Is it difficult to fabricate bent titanium exhaust pipes? Can custom bent-pipe assemblies be produced?
A: Titanium has lower ductility than stainless steel; creating small-radius bends requires specialized equipment and precise control over wall thickness. Our facility utilizes CNC bending technology to produce custom pre-bent pipe sections while strictly managing wall-thinning during the bending process.
Q: Should I choose ASTM B337 Gr2 or TC4 (Gr5) titanium tubing for an exhaust system?
A: For street use or standard track applications, Gr2 is the preferred choice, as it offers a better balance of cost-effectiveness and formability. For extreme conditions requiring ultra-high strength, Gr5 is the better option-though keep in mind that Gr5 is harder, which increases the cost of bending and fabrication.
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