Machined + assembled
Extrusion rotor
Multi-part rotor, machined and assembled to drawing. EN 10204 3.1 + dimensional report.
Proof
Proof, not promises.
Active programs, network production, qualification tracks, real parts. Each labeled exactly what it is. If a claim on this page cannot be checked in an audit, it does not belong on this page.
Active programs
Running now. Repeat orders.
Serial · 6 years · running
Forestry equipment OEM, Austria
| Scope | Welded structures, machined frames, sub-assemblies |
|---|---|
| Volume | 600+ parts per machine, serial deliveries |
| Duration | 6 years, single contract, one PO stream |
| Materials | S690QL, S960QL, 42CrMo4, HARDOX |
| Docs | EN ISO 3834-2 process, EN 10204 3.1 |
Name disclosed under NDA.
Serial · 10 000+ units/yr · running
Defence component program
| Scope | Precision-machined components, 5-axis, IT6 |
|---|---|
| Volume | 10 000+ units per year |
| Ramp | Serial ramp agreed per program |
| Materials | 5-axis machining to IT6, CMM trace per batch |
| Docs | EN 10204 3.1, CMM trace per batch, melt-and-pour origin in every quote |
Name under NDA.
Network production
Where network parts run.
Stratosteel contracts production across a certified network: the Slovak core plants under long-term agreements and further long-term EU partner plants. The network side has its own track record in the field.
Castings from our network run in major mining and construction OEM machines today. Heavy components for mining and off-highway equipment. That is network production, stated as exactly that: the foundry capacity behind a Stratosteel PO is the same capacity that serves those programs.
Qualification tracks
Tier 1 tracks under NDA.
No logo walls. Where there is no delivery yet, we say so. Current status, stated plainly:
| Tier 1 tracks | Four Tier 1 qualification tracks under NDA (marine, wind, rail, hydro), 2026. Engagements live, no delivery yet. |
|---|---|
| Energy | Live quotation work on turbine-class rotor machining for an energy OEM, 2026. Supplier-qualification invitation from a Tier 1 hydro OEM for welded hydromechanical components. Names under NDA. |
| Rail | Live RFQ work in rolling stock components. Quoting stage. Name under NDA. |
| Mining, energy, heavy equipment | Tier 1 OEMs in these sectors are targets. They are listed nowhere on this site as customers. |
When a track becomes a program, it moves up this page. Not before.
Active parts
Real parts, stated plainly.
Customer details stay anonymous. The parts do not.
Casting · machined
Heavy casting, machined
Cast steel, machined to drawing. Network production. Docs: EN 10204 3.1 + dimensional report.
Casting · machined
Brake disc
Full UT scope. Network production. Docs: EN 10204 3.1 + UT protocol + dimensional report.
Heavy machining · ring
Large-diameter ring, turned
Turned on a vertical lathe to drawing. Network production. Docs: EN 10204 3.1 + CMM report.
Weldment · machined
Welded and machined structure
High-strength steel, welded then machined. Network production. Docs: EN 10204 3.1 + weld documentation + dimensional report.
5-axis · IT6
Impeller, curved blades
5-axis machined to IT6. Network production. Docs: EN 10204 3.1 + CMM trace.
Casting · ADI
Armoured track set, finished
Austempered ductile iron, cast and finished. Network production. Docs: EN 10204 3.1 + dimensional report.
More parts
Machined, cast, assembled.
A cross-section of work off the network floor and our partner plants. Names under NDA, parts shown as delivered.
Names stay under NDA, but the people behind them do not have to. Reference calls are arranged under mutual NDA at qualification: name the sector and the part family that matters to you, and we ask the customer whose programme is closest. If they agree, you speak to them without us on the line. If they decline, we say so rather than substitute a weaker name. How that works →
Turning · batch
Finished precision shafts
Hardened and ground shafts, batch delivery in protective crating.
5-axis
Internal radial-vane housing
Internal radial vane geometry, 5-axis machined. CMM traced.
Heavy machining
Elongated housing
Long housing machined on a rotary table to drawing.
Turning · batch
High-tolerance flanges
Batch of precision flanges. EN 10204 3.1 + dimensional report.
Welded · machined
Auger screw flight
Welded helical flight, machined to drawing and delivered as one scope.
Quality system
One quality owner. Escalation to the Managing Director.
Whatever route a part takes through the network, we own responsibility for the result. One contract, one quality owner.
Documentation
EN 10204 3.1 material certificate is the standard, 3.2 with third-party witness on request. Dimensional report with CMM trace. Heat treatment records. melt-and-pour origin documented for tenders, EU-only routes on request.
Inspection
NDT per specification: UT, MT and PT in the network, RT via an ISO 17025 accredited laboratory. CMM dimensional inspection on critical parts. Inspection and test plan agreed before production starts, not after.
Accountability
Named quality owner per order. Nonconformities reported to you, not hidden. Critical findings escalate to the Managing Director personally, with a corrective action and a date.
Certifications
Certificates, stated by holder.
Held by Stratosteel s.r.o.
| ISO 9001:2015 | Quality management, certificate QMS-05-25-00, valid to 24.03.2028 |
|---|---|
| ISO 14001:2015 | Environmental management, certificate EMS-05-25-00, valid to 24.03.2028 |
| ISO 45001:2018 | Occupational health and safety, valid to 24.03.2028 |
| EN 10204 3.1 | Documentation standard on deliveries, 3.2 on request (per part, not a company certificate) |
Held within the network, named with certificate at qualification
| EN ISO 3834-2 | Welding quality, the Slovak core weld shop, weldments to 10 t |
|---|---|
| EN 1090-2 EXC3 | Structural steel execution, held by the assigned fabricating unit, partner scope to 64 t x 45 m. Certificate named and copied at qualification. |
ISO 9001ISO 14001ISO 45001EN ISO 3834-2EN 1090-2 EXC3 via fabricating unitEN 10204 3.1 / 3.2
Capability sheet (PDF) and registry extracts available on request: rfq@stratosteel.com.
Audit us
What an audit with us looks like.
Four steps. Document package first, plant visit by appointment, dates agreed at the start, arranged through us.
STEP 1
Document package
NDA if you want one, then certificates, quality manual, organization and process overview. Sent within days, not weeks.
STEP 2
Plant visit
Open floor. You see the machines, the people and live parts in process. Any plant, any day, by appointment.
STEP 3
Live traceability check
Pick any part on the floor. We pull its material certificate, route card, inspection records and NDT reports while you watch.
STEP 4
Findings and closure
Findings logged, corrective actions with owners and dates.