How to Pick Between Gr2 and Gr4 Titanium Wires Based on Their Strength and Actual Working Conditions?
- Gr2 Titanium Wire, Gr4 titanium wire
Grade 2 versus Grade 4 titanium wire: both are unalloyed titanium grades, but they have different mechanical requirements. Grade 2 is UNS R50400 and Grade 4 is UNS R50700. Choose between them using the same wire specification edition, diameter, condition and test method.
How to compare
ASTM B863 covers titanium and titanium-alloy wire. Read the contracted edition’s grade-specific limits and compare the supplied lot certificates. Nominal strength numbers taken from different product forms or conditions cannot establish a reliable percentage advantage. Formability, joining, springback and corrosion suitability also need evaluation for the finished component.
Selection by component requirement
| Question | Evidence |
|---|---|
| Does the wire meet the drawing? | Diameter, tolerance, condition and lot-specific inspection. |
| Will it survive the load? | Representative static and fatigue assessment of the finished design. |
| Will it suit the environment? | Actual chemistry, temperature, contact materials and exposure plan. |
| Is it for a medical device? | Device-specific materials, biocompatibility, process and regulatory evidence. |
The previous article’s fixed wear-life multipliers and simulated marine field results could not be verified and have been removed. Neither grade guarantees clinical outcomes or a particular service life. See the titanium wire category and send a technical RFQ with the drawing.
Source and limitation: ASTM B863 identifies the material specification’s scope. This guide does not certify any supplied lot or finished component; confirm the agreed edition and inspection records for an order.
Published by: Titanium Valleys
Technical review: General Manager of the Production Department
Quality review: Quality Inspection Department
Last reviewed: October 20, 2026