Everything You Need to Know AboutGr12 Titanium Alloy Wire Specifications
- Gr12 Titanium Alloy Wire
1. Introduction
Gr12 titanium alloy wire (Ti-0.3Mo-0.8Ni) is a medium-high strength titanium alloy wire material widely used in springs, wire meshes, fasteners, and elastic components. Understanding the specification parameters of Gr12 titanium alloy wire is critical for proper material selection and ensuring product quality. This article covers six key aspects of Gr12 titanium alloy wire specifications: diameter specifications, mechanical properties, surface quality, delivery states, testing standards, and packaging and transportation.
2. Diameter Specifications
The standard diameter range for Gr12 titanium alloy wire is 0.1–12.0 mm. Based on application requirements, the wire can be classified into three categories:
Fine Wire (0.1–1.0 mm): primarily used for precision springs, electronic components, and fine wire weaving.
Medium Wire (1.0–5.0 mm): primarily used for fasteners, wire meshes, and general structural parts.
Coarse Wire (5.0–12.0 mm): primarily used for large springs, heavy-duty fasteners, and structural components.
Diameter Tolerances (per ASTM B348)
| Diameter Range (mm) | Diameter Tolerance (mm) | Surface Roughness Ra (μm) | Typical Applications |
| 0.1–1.0 | ±0.02 | ≤0.4 | Precision springs, electronic components |
| 1.0–3.0 | ±0.03 | ≤0.8 | Fasteners, fine wire mesh |
| 3.0–6.0 | ±0.05 | ≤1.6 | Structural parts, springs |
| 6.0–12.0 | ±0.08 | ≤3.2 | Heavy-duty springs, large fasteners |
Diameter tolerances comply with ASTM B348 standards:
- Diameter ≤1.0 mm: ±0.02 mm
- Diameter 1.0–3.0 mm: ±0.03 mm
- Diameter 3.0–6.0 mm: ±0.05 mm
- Diameter 6.0–12.0 mm: ±0.08 mm
3. Mechanical Property Specifications
Mechanical properties of Gr12 titanium alloy wire vary according to the temper (delivery state). The following table summarizes the specifications:
| Temper / Delivery State | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| Annealed (M) | 480–620 | 345–380 | 18–25 |
| 1/4 Hard | 580–680 | 450–520 | 12–18 |
| 1/2 Hard | 650–750 | 550–620 | 8–12 |
| Full Hard | 720–820 | 650–720 | 5–8 |
Mechanical Properties by Temper (Text Format)
Annealed Condition (M): Tensile strength 480–620 MPa, yield strength 345–380 MPa, elongation 18–25%
1/4-Hard Condition: Tensile strength 580–680 MPa, yield strength 450–520 MPa, elongation 12–18%
1/2-Hard Condition: Tensile strength 650–750 MPa, yield strength 550–620 MPa, elongation 8–12%
Full-Hard Condition: Tensile strength 720–820 MPa, yield strength 650–720 MPa, elongation 5–8%
4. Surface Quality Specifications
Surface quality is essential for ensuring the performance and reliability of titanium alloy wire. The specifications are as follows:
- Surface roughness: Ra ≤ 0.8 μm (fine wire) or Ra ≤ 1.6 μm (medium/coarse wire)
- Surface shall be free of cracks, laps, scales, and hairline defects
- Allowed minor scratch depth shall not exceed 50% of the diameter tolerance
5. Delivery States
Gr12 titanium alloy wire is supplied in the following conditions:
Annealed Condition (M): Relieves processing stresses and restores plasticity.
Cold-Worked Condition (Y): Achieves desired strength through cold drawing.
Solution-Treated Condition (S): Prepares the material for subsequent aging treatment.
6. Testing Standards
Quality inspection of Gr12 titanium alloy wire follows internationally recognized testing standards:
| Test Item | Standard Method | Inspection Frequency | Acceptance Criteria |
| Chemical Composition | ASTM E1019 | Each Batch | Conforms to specifications |
| Mechanical Properties | ASTM E8 | Each Batch | Conforms to specifications |
| Dimensional Measurement | ASTM E29 | Each Batch | Within tolerance |
| Surface Inspection | Visual + Magnification | Each Batch | No defects |
Non-Destructive Testing: Eddy current testing (ET) is performed to detect subsurface and surface defects.
7. Packaging and Transportation
Standard Packaging: Vacuum packaging or inert gas protective packaging
Weight per Coil: 5–50 kg (varies by diameter)
Transportation Requirements: Avoid mixing with corrosive substances; protect from moisture and mechanical damage
8. Conclusion
Gr12 titanium alloy wire offers extensive specification options to meet diverse industrial application needs. Proper understanding and selection of Gr12 titanium alloy wire specification parameters are essential for ensuring product quality and controlling costs. Whether for precision springs, structural fasteners, or electronic components, Gr12 titanium alloy wire provides reliable performance in demanding environments.
9. Frequently Asked Questions
Q1: What is the minimum order quantity (MOQ) for Gr12 titanium alloy wire?
The MOQ for standard specifications is 50 kg. Special/custom specifications may require 100 kg or more.
Q2: What is the delivery lead time for Gr12 titanium alloy wire?
The lead time for standard specifications is 4–6 weeks. Special/custom specifications may require 6–10 weeks.
Q3: Can Gr12 titanium alloy wire undergo surface treatments?
Yes. Gr12 titanium alloy wire can be subjected to passivation, coating, and other surface treatments to enhance corrosion resistance or meet special requirements.
10. Finding a Reliable Supplier
Baoti Titanium Valley Titanium Nickel Zirconium Material Processing Co., Ltd. is a professional manufacturer of high-end rare metal processing products. Equipped with Danieli rolling production lines from Italy, the company produces over 3,000 metric tons of titanium wire annually and offers full-size customization with EN 10204 Type 3.1 certification services.
Contact us now for technical support and quotation: sales@titaniumvalleys.com
11. References
- [1] ASTM B348-22: Standard Specification for Titanium and Titanium Alloy Bars and Ingots. West Conshohocken: ASTM International, 2022.
- [2] GB/T 3623.1-2017: Titanium and Titanium Alloy Wire Rod — Part 1: Dimensions, Out-of-Roundness and Allowable Deviations. Beijing: Standards Press of China, 2017.
For a broader view of available grades, supply forms, and related specifications, explore our Titanium Wire category.
For product-level details and supply options, you can also review our AMS 4951 Grade 12 Titanium Alloy Wire page.