DIN 17862: Titanium and Titanium Alloys-Forgings and Forged Bars

Titanium and Titanium Alloys – Forgings and Forged Bars

DIN 17862 specifies the technical delivery conditions for forgings and forged bars made from titanium and titanium alloys. This includes products used in industrial, aerospace, and medical applications where forged strength and reliability are required.

This standard must be used together with DIN 17850, which outlines the general requirements for semi-finished titanium products.

Products Covered

Forgings: open-die, closed-die, and precision-forged parts

Forged bars: round, square, flat sections, including those for re-machining

These products are typically delivered in the annealed, solution-treated, or solution-treated and aged condition, depending on the alloy and application.

Applicable Materials

Typical titanium grades include:

Each alloy must comply with specific chemical compositions, consistent with DIN, ASTM, or ISO equivalents.

Dimensional Requirements

Supplied dimensions (length, diameter, width) are agreed upon between manufacturer and customer.

Tolerances are not specified in DIN 17862 itself but follow:

DIN ISO 286-2 or

Customer specification or

Drawing requirements for near-net shape forgings

Mechanical Properties

Typical mechanical properties are measured in the longitudinal direction of the forging or forged bar, usually in the annealed condition unless otherwise specified.

The mechanical properties required are dependent on:

Alloy grade

Delivery condition

Size and cross-section

Heat treatment history

Testing is required per batch and includes:

Tensile test

Elongation & reduction of area

Optional impact testing (as agreed)

Surface and Internal Quality

Surface must be:

Free of cracks, laps, folds, and scale

Light grinding or pickling allowed

For critical applications:

Ultrasonic testing is often mandatory

Internal structure should be free of porosity or segregation

Microstructure may be verified against alloy-specific grain size requirements

Testing and Certification

Required tests include:

Chemical composition--Per melt, verified per EN or DIN methods

Tensile testing--Per batch, longitudinal sample

NDT (optional)--Ultrasonic, FPI, MPI – if specified

Dimensional inspection         --Full check of shape and tolerances

Inspection certificate:

Issued per EN 10204, typically type 3.1. Certificate must include:

Heat number

Chemical analysis

Mechanical properties

Dimensions and delivery condition

Marking

Each product must be marked with:

Manufacturer’s symbol or name

Alloy grade (e.g., Ti Gr 5)

Heat number

Standard (e.g., DIN 17862)

Dimensions (if applicable)

Forgings with complex geometry may have marking on tags or labels.

Typical Applications

Industry--Forging Use Cases

Aerospace--Landing gear parts, brackets, fasteners

Medical--Implant blanks (hip stems, bone plates)

Industrial--Valve bodies, pump impellers

Marine--High-stress shafts, corrosion-resistant parts

Automotive--Suspension arms, connecting rods (racing)

Comparison to Other Standards