DIN 17861 specifies the technical delivery conditions for cold-drawn round wire made of titanium and titanium alloys. It applies to wire used in:
Aerospace components
Chemical industry
Welding filler materials
Medical devices
Springs, precision parts, and fasteners
Product Form
Product: Drawn wire (round cross-section)
Delivery Forms: Coils (spools), straight lengths
Surface finish: Clean, free from oxidation, cracks, and other surface defects
Production Method: Cold drawn from hot-rolled or forged rod
Typical Grades Covered
The standard includes commercially pure titanium and titanium alloys such as:
|
Grade |
Alloy Type |
Equivalent ASTM Grade |
|
Ti Grade 1 |
Unalloyed, soft |
ASTM Gr 1 |
|
Ti Grade 2 |
Unalloyed, standard |
ASTM Gr 2 |
|
Ti Grade 5 |
Ti-6Al-4V |
ASTM Gr 5 |
|
Ti Grade 9 |
Ti-3Al-2.5V |
ASTM Gr 9 |
|
Ti Grade 23 |
Ti-6Al-4V ELI |
ASTM Gr 23 |
Other alloys may also be specified depending on the application.
Dimensions and Tolerances
Diameter Range: Typically from 0.1 mm to 8 mm
Tolerance Class: Generally h9 or finer, depending on customer specification and application
Roundness and straightness: Must comply with DIN dimensional tolerances
Mechanical Properties (Example for Gr 2-Cold Drawn)
|
Property |
Value (Indicative) |
|
Tensile Strength |
≥ 400 MPa |
|
Yield Strength (Rp0.2) |
≥ 275 MPa |
|
Elongation |
≥ 18% |
|
Condition |
Cold worked (CW) |
Actual values depend on diameter and specific material grade.
Chemical Composition (Example-Gr 2)
|
Element |
Max. Content (%) |
|
O (Oxygen) |
0.25 |
|
C (Carbon) |
0.08 |
|
N (Nitrogen) |
0.03 |
|
H (Hydrogen) |
0.015 |
|
Fe (Iron) |
0.3 |
|
Ti |
Balance |
Testing and Inspection Requirements
Tensile Test at room temperature
Chemical Analysis (per melt)
Surface Inspection (no cracks, flakes, pits)
Diameter and Tolerance Checks
Optional: Eddy current testing, microstructure, grain size (upon request)
Marking and Certification
Each coil or length is typically marked with:
Grade
Heat number / batch number
Manufacturer’s name or logo
Standard reference (e.g., DIN 17861)
Usually EN 10204 Type 3.1
Includes chemical composition, mechanical properties, and conformance statement
Related Standards
DIN 17850-General technical delivery conditions for titanium products
ASTM B863-Standard Specification for Titanium and Titanium Alloy Wire
AMS 4951-Aerospace specification for Ti wire
ISO 24034-Titanium wire for welding
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