We inspect all types of forged parts – non-destructively (NDT) and destructively – and provide fast, standard-compliant inspection reports for your quality assurance. Our personnel are qualified by industry and material for forged products.

NDT Procedures for Forged Parts

Ultrasonic Testing (UT) – e.g. according to DIN EN 10228‑3/‑4 or customer specification
Radiographic Testing (RT) – according to DIN / ASTM
Magnetic Particle Testing (MT) – according to DIN EN ISO / DIN EN 10228‑1
Visual Testing (VT) – according to standard / specification
Penetrant Testing (PT) – e.g. according to DIN EN 10228‑2

Destructive Testing (Excerpt)

Tensile Test – yield strength, tensile strength, elongation at break
Hardness Testing – Brinell, Vickers, Rockwell
Impact Bending Test – Charpy
Metallography – microstructure analysis, grain size, coating thickness

After completion, you receive an accredited inspection report – fast, transparent, and optionally with photo documentation.

Frequently Asked Questions

What is Zeros GmbH?

Zeros GmbH is an independent testing laboratory for destructive and non-destructive materials testing. We support companies from incoming inspection to series release – including digital test reports and full traceability.

We operate under accreditation to DIN EN ISO/IEC 17025 (quality management for laboratories). See our current accreditation information here.

Write an email Accreditation Certificates

Which standards is Zeros accredited to?

We are accredited by DAkkS to DIN EN ISO/IEC 17025. This standard ensures that test methods, equipment control, personnel qualification and reporting meet the highest requirements.

An overview of services and scopes is available on our homepage.

Write an email Accreditation Certificates

What services does Zeros GmbH offer?

Our portfolio covers NDT (UT, RT, MT, PT, VT), mechanical testing (tensile, hardness, Charpy), metallography (microstructure, grain size, coating thickness) and chemical analysis (e.g. OES, XRF). We also provide specimen preparation, documentation and consulting.

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How can I use Zeros services?

Please contact us by email or use the contact option on the website. Share material, standard/specification and quantity – we'll get back to you promptly with a solution.

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Defect Group

Defect Type

Causes

Detectability

Cracks

Stress cracks, hardness cracks

Improper heat treatment (too rapid heating/cooling), uneven cross-sections, existing pre-damage

UT · RT · MT · PT

Cracks

Flake cracks

Hydrogen in the material; gas activation during heat treatment; grain boundary cracking

UT · RT · MT · PT

Forging Defects

Core forging defect

Insufficient heating of the workpiece core → reduced formability, internal damage

UT · RT

Forging Defects

Forging fold

Too small volume/poor preform; insufficient material intake before forming

MT · PT · VT

Forging Defects

Cold welding

Separations in joining/forming process due to too low temperature or oxidation

UT · RT · MT · PT · VT

Microstructure

Microstructure inhomogeneities

Misoriented carbides/non-metallic inclusions (e.g. sulfides/nitrides), faulty heat treatment

Metallography

Raw Material

Laminations

Former gas bubbles/voids/segregations from the block; lack of metallurgical bonding during forming

UT · RT

Forged Part Inspection