ASME SB338 UNS R50400 Seamless Titanium Tubes for Condensers and Heat Exchangers
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what is ASME SB338?
ASME SB-338 is a standard specification for both seamless and welded titanium and titanium alloy tubes intended for use in heat exchangers, surface condensers, and evaporators. The standard defines the chemical composition, mechanical properties, dimensions, and testing requirements, including flattening, flaring, and non-destructive tests, for 28 different grades of titanium and its alloys.
What is UNS R50400?
UNS R50400 seamless titanium pipe is commercially pure (CP) titanium pipe (also known as Grade 2 titanium pipe) that combines a low weight ratio with high strength and the excellent corrosion resistance inherent in titanium and its alloys. ASME SB338 UNS R50400 seamless pipe offers greater strength and pressure resistance than welded pipe due to the absence of seams. Because it can withstand high pressures, temperatures, and corrosive environments, this pipe is widely used in demanding applications in industries such as oil and gas, chemical processing, aerospace, and power generation.
What is the equivalent of uns R50400?
Designated as UNS R50400, the ASTM Grade 2 titanium (commercially pure titanium) has several international equivalents which include DIN 3.7035 (German), GOST BTI-0 (Russian), BS 25-35t/in2 (British), JIS Class 2 (Japanese), Gr. TA2 (Chinese GB).
Chemical Composition of ASME SB338 UNS R50400 (Grade 2/2H) Titanium
| <=0.08 | ||
| 0.25 (range) | ||
| <=0.03 | ||
| <=0.015 | ||
| <=0.30 | ||
| <=0.10 | Includes Cr, Mo, Ni, etc. | |
| <=0.40 |
Mechanical Properties of ASME SB338 UNS R50400 (Grade 2/2H) Titanium
| Grade 2 Requirement | Grade 2H Requirement | ||
| 50 ksi (345 MPa) | 58 ksi (400 MPa) | Grade 2H offers higher strength | |
| 40 ksi (275 MPa) | 40 ksi (275 MPa) | ||
| 65 ksi (450 MPa) | 65 ksi (450 MPa) | ||
| 20% | 20% | Measured in 2-inch gauge length |
Cp Gr 2 ERW Pipe Application
Hydro-Carbon Process Plants
Because of it light weight, good weldability, strength and ductility Titanium Grade 2 finds its application in following industry
GNEE provides ASME SB338 UNS R50400 seamless titanium tubes manufactured from high-purity titanium (>=99.2% Ti). These seamless tubes feature precise dimensional tolerances (outer diameter ±0.05mm, wall thickness ±0.03mm), with outer diameters ranging from 6.0-114.3mm (1/4"-4.5") and wall thicknesses from 0.5-3.0mm (0.020"-0.118"), conforming to ASTM B338/ASME SB338 standards.
The UNS R50400 tubes exhibit tensile strengths of 480-620MPa (Grade 2) and >=550MPa (Grade 2H), yield strengths of >=345MPa (Grade 2) and >=450MPa (Grade 2H), and elongation of >=24%.
All tubes are supplied with mill test certificates (EN 10204 3.1) and optional third-party corrosion and metallurgical analysis reports, ensuring quality and traceability for critical applications in heat exchangers, condensers, and marine piping systems.Email: info@gneestainless.com
