ASTM B348 Titanium Bar
This ASTM B348 Standard Specification is for annealed Titanium and Titanium Alloy Bars and Billets, Grades from grade 1 to grade 34. Titanium is used in oil exploration, power plants and mining and processing plants.
Product Introduction
Manufactured in accordance with ASTM B348, titanium bars are produced through hot rolling and forging processes that reduce ingot diameter while extending length. This method ensures excellent dimensional accuracy and consistent mechanical properties across the entire bar.
Titanium bars are valued for their high strength, low density, and outstanding corrosion resistance, making them an ideal choice for demanding environments across aerospace, medical, and industrial sectors.
We supply a full range of titanium bar grades:
Gr1, Gr2 (Commercially Pure Titanium)
Gr5 (Ti-6Al-4V)
Gr7 (Corrosion-resistant alloy)
Gr23 (Gr5 ELI – Extra Low Interstitial, medical grade)
Custom sizes and lengths are available upon request. All bars undergo ultrasonic inspection (UT) prior to delivery to ensure internal integrity.
Product Terminology
Bar
A solid semi-finished product produced by hot rolling, forging, or cold working, with a cross-sectional area ≤ 16 in² (10,323 mm²).
Rectangular bars: width ≤ 254 mm and thickness > 4.8 mm
Billet
A semi-finished solid section with cross-sectional area > 16 in², where width is less than five times the thickness.
Dimensional Tolerances
Hot Rolled Round & Square Bars
Size Range (mm) | Size Variation (mm) | Out-of-Round / Out-of-Square (mm) |
6.35 – 7.94 | ±0.13 | 0.20 |
7.94 – 11.11 | ±0.15 | 0.23 |
11.11 – 15.88 | ±0.18 | 0.25 |
15.88 – 22.22 | ±0.20 | 0.30 |
22.22 – 25.40 | ±0.23 | 0.33 |
25.40 – 28.58 | ±0.25 | 0.38 |
28.58 – 31.75 | ±0.28 | 0.41 |
31.75 – 34.92 | ±0.30 | 0.46 |
34.92 – 38.10 | ±0.36 | 0.53 |
38.10 – 50.80 | ±0.40 | 0.58 |
50.80 – 63.50 | ±0.79 | 0.58 |
63.50 – 88.90 | ±1.19 | 0.89 |
88.90 – 114.30 | ±1.59 | 1.17 |
Length Tolerances (Hot Rolled & Cold Finished)
Size Range (mm) | Length | Tolerance |
≤ 50.8 | ≤ 3.66 m | -0 / +12.7 mm |
3.66–7.62 m | -0 / +19.05 mm | |
50.8–101.6 | ≤ 3.66 m | -0 / +19.05 mm |
3.66–7.62 m | -0 / +25.4 mm | |
101.6–152.4 | ≤ 3.66 m | -0 / +25.4 mm |
3.66–7.62 m | -0 / +31.75 mm | |
152.4–228.6 | ≤ 3.66 m | -0 / +31.75 mm |
3.66–7.62 m | -0 / +38.1 mm | |
228.6–304.8 | ≤ 3.66 m | -0 / +38.1 mm |
3.66–7.62 m | -0 / +50.8 mm |
Machine-Cut After Straightening:
Size Range (mm) | Length Variation |
≤ 76.20 | -0 / +3.18 ~ +4.76 mm |
76.20–152.40 | -0 / +4.76 ~ +6.35 mm |
152.40–228.60 | -0 / +6.35 ~ +7.94 mm |
228.60–304.80 | -0 / +12.70 mm |
Surface Condition & Finish
Titanium bars are supplied free from harmful internal or surface defects that could affect performance.
Available surface finishes include:
Descaled
Sandblasted
Ground
Rough-turned
Minor surface imperfections may be removed by localized grinding, provided final dimensions remain within tolerance limits.
Applications
Titanium bars are widely used across multiple high-performance industries:
Aerospace
Structural frames, engine components, fasteners, and propeller systems.
Medical
Implants, surgical instruments, and orthopedic devices (Gr23/ELI for superior biocompatibility).
Industrial
Chemical processing equipment, marine components, heat exchangers, and corrosion-resistant systems.
Consumer Electronics
Premium casings and structural components, such as those used in devices like the Apple PowerBook, leveraging titanium's strength and aesthetic appeal.
Defense & Armor
Lightweight protective systems due to exceptional strength-to-weight ratio and corrosion resistance.
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