AMS4921 CP Grade 4 Titanium Bars, Wire, Forgings, and Rings
- CP Grade 4, Commercially Pure
- Annealed condition
- High strength-to-weight ratio
- Excellent corrosion resistance
- Good biocompatibility
- High fatigue strength
- Good weldability
AMS4921 CP Grade 4 Titanium Bars, Wire, Forgings, and Rings Commercially Pure
AMS4921 CP Grade 4 Titanium Bars, Forgings, and Rings from Golden Sunbird Metals are premium commercially pure titanium products designed for applications that require excellent corrosion resistance, dependable strength, and outstanding biocompatibility. As the strongest grade in the CP titanium family, AMS4921 Grade 4 offers a higher strength level than lower-purity grades while still maintaining the excellent formability, weldability, and corrosion performance that make commercially pure titanium so widely used. These bars, forgings, and rings are ideal for chemical processing, marine, medical, aerospace, and other demanding industrial environments where long-term reliability is essential. With a strong balance of durability, lightweight performance, and resistance to aggressive media, AMS4921 CP Grade 4 titanium is well suited for critical components and precision-engineered parts. At Golden Sunbird Metals, we supply high-quality titanium products with strict control over material consistency, traceability, and dimensional accuracy to meet demanding technical requirements with confidence.
Chemical Composition (wt.%) of AMS4921 CP Grade 4 Titanium Bars, Wire, Forgings, and Rings
| Element | Min | Max |
| Iron | — | 0.50 |
| Oxygen | — | 0.40 |
| Carbon | — | 0.08 |
| Nitrogen | — | 0.05 (500 ppm) |
| Hydrogen | — | 0.0125 (125 ppm) |
| Other Elements, each (3.1.1) | — | 0.10 |
| Other Elements, total (3.1.1) | — | 0.30 |
| Titanium | remainder | |
Mechanical properties of AMS4921 CP Grade 4 Titanium Bars, Wire, Forgings, and Rings
| Property | Value |
|---|---|
| Tensile Strength | 80 ksi (552 MPa) minimum |
| Yield Strength (0.2% Offset) | 70 ksi (483 MPa) minimum |
| Elongation (in 2 inches or 50mm/4D) | Longitudinal (L): 15%, Long-Transverse (L-T): 12%, Short-Transverse (S-T): 10% |
| Reduction of Area | Longitudinal (L): 30%, Long-Transverse (L-T): 25%, Short-Transverse (S-T): – |
Features
- AMS4921 / CP Grade 4 commercially pure titanium bars, forgings, rings, and wire in annealed condition.
- Highest strength among all commercially pure titanium grades while maintaining excellent ductility and toughness.
- Superior corrosion resistance in seawater, chloride solutions, acids, and most aggressive industrial chemicals.
- Excellent biocompatibility and inertness, ideal for long-term human body contact.
- High fatigue strength and reliable performance under cyclic loading.
- Outstanding weldability and fabricability using standard titanium techniques with minimal post-weld treatment.
- Lightweight with strength comparable to many steels at approximately 60% of the density.
- Cost-effective solution offering an optimal balance of strength, corrosion resistance, and formability.
- Available in a wide range of forms: bars, wire, forgings, rings, and blocks to meet aerospace, medical, marine, and chemical processing needs.
Technical Specifications
| Specification | Value |
| Standard | AMS4921 CP Grade 4 Titanium Bars, Wire, Forgings, and Rings Commercially Pure 70 Ksi (483 MPa) Yield Strength |
| Grade | Commercially pure Grade 4, CP Grade 4 |
| Type | Bar, Wire, Forgings, Rings |
| Dimension | Bar Dia: 0.25 to 12 inches (6.35 to 304.8 mm), Length: up to 20 feet (6096 mm) |
| Wire Dia: 0.020 to 0.500 inches (0.51 to 12.7 mm) | |
| Block: Width: 2 – 24 inches (50 -610mm) x Height: 2 – 24 inches (50-610mm) x Length: 2 – 20 feet (610-6100mm) | |
| Rings: OD: 250-1500mm, ID: 150-1400mm, Height: 20-500mm | |
| Density | 4.51g/cm³ |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Tests | Chemical Composition, Mechanical Properties |
Applications
- Aerospace structural components such as airframes, landing gear parts, engine mounts, brackets, and fasteners requiring high strength-to-weight ratio.
- Medical implants and devices including hip and knee replacements, bone plates, screws, and dental fixtures.
- Surgical instruments and tools demanding strength, precision, corrosion resistance, and biocompatibility.
- Marine hardware including boat hull fittings, propeller shafts, rigging components, and seawater-exposed parts.
- Chemical processing equipment such as reactor vessels, piping systems, heat exchangers, and tanks handling corrosive media.
- Offshore oil and gas platforms and subsea equipment requiring lightweight, corrosion-resistant forgings and bars.
- Automotive components and high-performance sporting goods such as bicycle frames, golf club heads, and fasteners.
- Architectural and industrial structural forgings where durability, lightweight design, and corrosion resistance are critical after proper qualification and heat treatment.
