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Product Introduction
ASTM B348 Titanium Block refers to titanium/titanium alloy block machined or cut from ASTM B348 bars/billets (Standard Specification for Titanium and Titanium Alloy Bars and Billets)ASTM. It is a high quality, standardized block material widely used in aerospace, medical, marine, and industrial fields.
Basic Standard & Definition
- Standard: ASTM B348 / ASME SB 348 (latest: B348 21)ASTM
- Scope: Covers annealed titanium and titanium alloy bars, billets, and blocks cut/machined therefromASTM
- Key Coverage: Chemical composition, mechanical properties, dimensional tolerances, and quality requirements
- Manufacture: Block is typically billet cut, bar cut, or forged from ASTM B348 billet
Common Grades (ASTM B348)ASTM
|
Grade |
UNS |
Alloy Type |
Key Features |
|
Grade 1 |
R50250 |
Unalloyed Ti |
Highest ductility, softest, best corrosion resistance |
|
Grade 2 |
R50400 |
Unalloyed Ti |
Most widely used, good balance of strength & ductility |
|
Grade 5 |
R56400 |
Ti 6Al 4V |
High strength, most common structural alloy |
|
Grade 23 |
R56407 |
Ti 6Al 4V ELI |
Extra low interstitial, high toughness, medical implant grade |
|
Grade 9 |
R56320 |
Ti 3Al 2.5V |
Medium strength, excellent weldability |
|
Grade 12 |
R53400 |
Ti 0.3Mo 0.8Ni |
High corrosion resistance in reducing/oxidizing media |
Mechanical Properties (Typical, Annealed)
- Grade 2: Tensile ≥ 345 MPa; Yield ≥ 275 MPa; Elongation ≥ 20%
- Grade 5: Tensile ≥ 860 MPa; Yield ≥ 795 MPa; Elongation ≥ 10%
- Grade 23: Tensile ≥ 860 MPa; Yield ≥ 795 MPa; Elongation ≥ 15% (higher toughness)
Key Characteristics
- High strength-to-weight ratio: ~4.51 g/cm³, 60% lighter than steel
- Excellent corrosion resistance: Resists seawater, chlorides, acids, and alkalis
- Good machinability: CNC, milling, turning, drilling, and welding
- Biocompatibility: Gr23 meets ASTM F136 for surgical implants
- Uniform microstructure: From vacuum-melted (VAR) billets, low defects
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