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ASTM B338

ASTM B338 / ASTM B862 Titanium Welded Tubes

Ultimate corrosion resistance with unmatched strength-to-weight ratio

Titanium is not chosen to save money — it is chosen to eliminate failure.

ASTM B338 / B862 titanium welded tubes are specified where stainless steel, duplex, and even nickel alloys struggle to deliver long-term reliability.

These tubes combine:

  • Near-absolute corrosion resistance
  • Exceptional resistance to seawater & chlorides
  • High mechanical strength at low weight
  • Outstanding erosion & bio-fouling resistance

INOX STEEL INDIA supplies project-grade titanium welded tubes engineered for critical service environments.

Table of Contents

What Are Titanium Welded Tubes?

Titanium welded tubes are manufactured from titanium strip or plate using high-purity inert-gas welding (TIG / Plasma) under controlled environments.

The result is a tube with:

  • Fully fused weld seam
  • Bead removed or bead-rolled ID
  • Clean internal surface for heat transfer
  • Excellent structural integrity

Covered by:

  • ASTM B338 — seamless & welded titanium tubes for condensers & heat exchangers
  • ASTM B862 — welded titanium & titanium alloy tubes

Understanding Titanium Grades (Buyer-Friendly Guide)

Grade 1 — Maximum Formability

  • Highest ductility
  • Excellent corrosion resistance
  • Used in chemical processing & low-pressure systems

Grade 2 — Industry Standard (Most Popular)

  • Best balance of strength & corrosion resistance
  • Excellent seawater & chloride resistance
  • Dominant grade for condensers & heat exchangers

Grade 5 (Ti-6Al-4V) — High-Strength Alloy

  • Very high strength
  • Lower corrosion resistance than CP grades but still excellent
  • Used in aerospace & high-stress components

Grade 7 — Enhanced Crevice Corrosion Resistance

  • Pd-stabilized titanium
  • Exceptional resistance in reducing acids

Grade 9 & Grade 12 — Special Purpose Alloys

  • Grade 9: moderate strength, good formability
  • Grade 12: outstanding resistance in hot brine environments

Why Titanium Instead of Stainless, Duplex or Nickel Alloy?

Near-Absolute Corrosion Resistance

  • Seawater corrosion
  • Chloride attack
  • Pitting & crevice corrosion
  • MIC (microbiologically influenced corrosion)

Exceptional Weight Advantage

Titanium is approximately 45% lighter than steel, yet delivers comparable or higher strength.

Longest Service Life

Titanium heat-exchanger tubes routinely achieve 20–40+ years of service life.

High Thermal Efficiency

  • Smooth internal surface
  • Reduced fouling
  • Stable heat-transfer performance

ASTM B338 vs ASTM B862 — What’s the Difference?

Standard Scope Typical Use
ASTM B338 Seamless & welded tubes Condensers, heat exchangers
ASTM B862 Welded tubes only Process piping, fabricated systems

Key Industries Using Titanium Welded Tubes

Industry Applications
Power & Energy Steam condensers, cooling systems
Desalination RO plants, seawater intake
Chemical Processing Chloride-rich & acidic lines
Marine & Offshore Seawater cooling, heat exchangers
Aerospace & High-Tech Lightweight heat-transfer systems

Size Range, OD / WT Chart & Dimension Capability

OD Range (mm) WT (mm) Typical Applications
6 – 12.7 0.5 – 1.0 Instrumentation, chemical dosing
12.7 – 25.4 0.7 – 1.5 Condenser tubes
25.4 – 38.1 1.0 – 2.0 Heat exchangers
38.1 – 60.3 1.5 – 3.0 Process piping
60.3 – 168.3 2.0 – 6.0 Marine & offshore headers

Testing & Inspection

  • Eddy current / Ultrasonic testing
  • Dimensional inspection
  • Visual & surface inspection
  • Hydrostatic testing (if specified)
  • PMI & weld radiography

Price Range (Indicative)

Grade INR/kg USD/kg
Grade 1 ₹2,200 – 3,200 $26 – $38
Grade 2 ₹2,400 – 3,500 $28 – $42
Grade 5 ₹3,800 – 5,800 $46 – $70
Grade 7 / 12 ₹3,000 – 4,800 $36 – $58

Packaging & Export Handling

  • Plastic end caps & VCI wrapping
  • Moisture-proof packaging
  • Heat-treated wooden crates
  • Tube separators for damage-free transit

Get Titanium Welded Tubes for Critical Service

B338 covers seamless & welded tubes; B862 covers welded titanium tubes only.

Titanium is immune to seawater corrosion and has a very long service life.

Grade 2 is the most widely used for heat exchangers and condensers.

Yes—BV, DNV, TUV available.

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