Steel die forgings

We manufacture steel die forgings and their machined forgings. Thanks to our in-house design and production of forging tools, we maintain control over the entire process, including heat treatment and a comprehensive quality system.

Quality forged by experience

Steel die forgings are essential in the automotive industry, logistics, agriculture, and general engineering, where high durability and stress resistance are required. At OSTROJ, we combine cutting-edge forging technologies with rigorous quality control to produce components that meet the strictest customer and industry standards. Our forgings are integral to the chassis and accessories of leading global vehicle brands, with a significant portion dedicated to safety-critical and specialized parts.

We specialize in complex-shaped forgings with intricate parting lines, typically weighing between 0.5 and 20 kg. Our comprehensive manufacturing process includes:

  • Steel bar cutting,
  • forging & heat treatment,
  • shot blasting & finishing,
  • calibration & 100% surface defect inspection,
  • precision CNC machining,
  • electroplating, painting & final shipment.

By handling the entire production process under one roof, we ensure uncompromising quality, efficiency, and reliability.

Our customers

Why choose OSTROJ?

80 years of experience

We utilize and continuously develop our long-standing technological know-how.

In-house production

Including fully or partially robotized forging lines.

Speed and reliability

All goods are packed according to requirements and the agreed plan.

Management system

All operations are carried out in compliance with applicable standards and legislation.

In-house development and design

We offer high-precision machining of steel forgings using state-of-the-art CNC machines. With our in-house tool design, forging die maintenance, and machining fixtures, we provide fully customized solutions tailored to each customer’s needs. Every project is approached comprehensively, with a focus on technical excellence, cost efficiency, and streamlined logistics, ensuring optimal performance and maximum value for our clients.

3D CAD construction: Catia, NX, Solid Edge
3D CAE forging simulation: Forge 3D

Surface treatment of forgings

We provide a wide range of surface treatments from steel shot blasting and cold calibration to painting and electroplating. Heat treatment is carried out on continuous lines with process control in accordance with CQI-9 standards. For specific steel types, we also perform controlled cooling from forging temperature, which is a more energy-efficient alternative to conventional heat treatment.

Steel tempering with quenching in polymer or oil
Normalization annealing
Isothermal annealing
Controlled cooling from forging temperature (BY annealing)
Mechanical property testing
Material testing

Thorough technical inspection

The zero-defect strategy is our standard. Thanks to modern quality management systems and precise technical inspection, we ensure the reliability of the entire production process. We are equipped with inspection stations featuring 3D scanners or 3D coordinate measuring machines, devices for non-destructive surface defect testing (Magnetoflux), and non-destructive testing of metal parts (Eddyliner).

Non-destructive testing MT – magnetoflux
Non-destructive testing ET – eddy current
Dimensional inspection – 3D scanner, 3D measurement with renishaw and zeiss
Dimensional inspection – Mitutoyo roughness tester and profilometer

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Petr Vacha
Head of Sales, Forging and Hardening Division

OSTROJ a.s.
Tesinska 1586/66
746 01 Opava, CZ