Serial · welded + machined
Forestry winch drivetrain
Welded, machined and assembled gear housing from a 6-year serial program. EN ISO 3834-2, EN 10204 3.1.
The model
We are the sales force of our plants.
Stratosteel is a small coordination layer over five in-house plants and long-term European partner foundries, forges and presses across six countries. You sign one contract with us. We carry the engineering, the quality and the responsibility for the result. The plants make the parts. When they win steady work, you get stable capacity and one name that answers for all of it.
Operating company small. Network deep. That is the model, on purpose. Built by people who spent twenty years on the floor, and who still talk to buyers the way one engineer talks to another: drawing first, an honest yes or no, no theatre.
5
Production plants, Slovakia
13
Long-term network partners
6
Countries in the network
200+
CNC, foundry and forge machines
30,000+ t
Network steel throughput, annually
143
People in our five Slovak plants
Start here
What do you buy?
Route yourself by part family. Each page states the envelope, the documentation and the proof for that family.
You buy
Welded structures
High-strength steel weldments, machined after welding. In-house to 10 t under EN ISO 3834-2, to 64 t x 45 m via certified partner. S690QL, S960QL, HARDOX.
You buy
Machined parts
Workpiece to 50 t static, 30 t rotary, form-position 0.03 to 0.05 mm. From your casting, forging, weldment or raw material. CMM report included.
You buy
Castings
Steel castings to 50 t single piece via long-term EU foundry partners. Delivered machined and documented, not raw. NDT scope agreed before pour.
You buy
Serial small parts
5-axis precision to IT6. A serial program at 10 000+ units per year runs today. CMM trace per batch, samples to serial in one quarter.
Not sure which family your drawing is? Send it. An engineer routes it and replies in 1 business day.
Active programs
Judged by repeat orders.
6 years serial
Forestry equipment OEM, Austria
Welded structures, machined frames, sub-assemblies. 600+ parts per machine, one contract. Name under NDA.
10 000+ units/yr
Serial defence program
Precision-machined components, 5-axis, CMM trace per batch. Running now. Name under NDA.
Network production
Major mining and construction OEM machines
Castings from our network run in major mining and construction OEM machines today. Network production, stated as exactly that.
Every claim on this site is labeled exactly what it is: direct program, network production, or qualification track. Full proof page →
Our work
Real parts, off our floor.
Castings, weldments and machined parts we have delivered. Customer names stay under NDA. The parts do not.
Cast + machined
Cast then machined component
Steel casting finished to drawing on a rotary table. Network production. EN 10204 3.1 + dimensional report.
Heavy machining
Precision rotor shafts
Long shafts machined and finished. Form-position 0.03 to 0.05 mm. CMM report per batch.
5-axis · IT6
5-axis mould cavity
Large aluminium mould cavity, mirror finish, 5-axis machined to IT6.
Welded + machined
Heavy welded machine frame
Large welded steel frame for a 40-tonne-class machine, machined faces. EN ISO 3834-2.
Heavy machining
Large bored housing
Cylindrical housing line-bored on a horizontal mill. EN 10204 3.1 + dimensional report.
More parts, references and the audit process on the proof page →
Inside the network
Five plants. Long-term EU partners.
Foundry
Steel pour
Steel castings to 50 t single piece via long-term EU foundry partners. NDT scope agreed before pour.
Weld shop
Certified welding
EN ISO 3834-2 in-house to 10 t, to 64 t x 45 m via certified partner under EN 1090-2 EXC2.
Heavy machining
Horizontal boring mill
Workpieces to 50 t static, 30 t rotary. Form-position 0.03 to 0.05 mm.
Our films
Inside Stratosteel.
Real shop floors, real machines, real people. Not stock footage.
Walk the network
Don't take the website's word.
The Stratosteel Digital Expo is an industrial fair that never closes. Five halls by capability. Real machine floors on camera, not marketing pages. Book 15 minutes straight into the maker's calendar. Visitors free, business email, approved by a person within one business day.
The meeting is the product. Nothing else is for sale.
What we make
Four part families. Checkable envelopes.
Part family
Heavy weldments
10 t in-house
EN ISO 3834-2 in-house to 10 t. To 64 t x 45 m via partner network, EN 1090-2 EXC2.
Part family
Heavy machining
to 50 t
50 t static, 30 t rotary, 0.03 to 0.05 mm form-position. VTL to D3 m, deep drilling dia 400 x 6000.
Part family
Heavy castings
to 50 t
Steel castings to 50 t single piece via long-term EU foundry partners. Ductile and grey iron on project basis.
Part family
Open-die forgings
project basis
Open-die forgings on project basis via qualified EU partner presses, ESR special metallurgy available, machining integrated to 50 t.
Plus 5-axis precision (IT6) and quality & NDT (EN 10204 3.1).
Capability at a glance
Every envelope on one screen.
| Heavy castings | to 50 t single piece, long-term EU foundry partners | EN 10204 3.1, NDT pre-agreed |
|---|---|---|
| Open-die forgings | project basis, qualified EU partner presses, machined to 50 t | EN 10204 3.1 |
| Heavy weldments | 10 t in-house (EN ISO 3834-2), to 64 t x 45 m via partner (EN 1090-2 EXC2) | weld docs + EN 10204 3.1 |
| Heavy machining | 50 t static, 30 t rotary, 0.03 to 0.05 mm form-position | CMM report |
| 5-axis precision | serial to IT6, a 10 000+ units per year program running | CMM trace per batch |
| Quality & NDT | UT, MPI, RT, LP, CMM dimensional | EN 10204 3.1, 3.2 on request |
One contract covers any combination, EU origin. How we work →
Real machines
Real machines. Real tonnage. Real certifications.
Behind every Stratosteel contract is named, audit-able equipment. We do not hide behind marketing copy. Procurement teams that need verifiable capability scope get it here.
Heavy milling
TOS Kurim FUQ 150
Horizontal milling, envelope 9 x 3 x 2.5 m, workpieces to 50 t static. Form-position 0.03 to 0.05 mm.
Vertical turning
VTL 2500 ATC+C
Vertical turning to D 3 m, rings, flanges and housings to 15 t on the table. Live tooling, one setup.
Deep drilling
GUANLU TSK 2120 x 6000
Deep drilling to dia 400 x 6000 mm. Long bores for shafts, cylinders and energy components.
Horizontal boring
TDZ HCB 110 CNC
Horizontal boring and milling of drums, housings and frames. Workpieces to 50 t static on floor plates.
5-axis
GROB G550
Horizontal 5-axis with rotary pallet automation, one of seven 5-axis centres (4x GROB, 3x Hermle). A 10 000+ units per year serial program to IT6 runs on this floor today.
Quality
WENZEL LH 108 CMM
CMM dimensional verification. UT, MPI, RT, LP in scope. EN 10204 3.1 standard, 3.2 on request.
Six of 200+ machines across five plants and the partner network. Full machine list per plant is on the table in an audit. Audit us →
Industries
Same machines. Different proof per sector.
Mining
Crusher and wear parts. Network castings in the field today.
Energy: wind, hydro, power gen
Ductile iron structures, hydro and turbine-class rotors.
Marine
Propulsion and deck machinery part families ready.
Rail
Axles and bogie components. Live RFQ work.
Defence
Serial defence component program, 10 000+ units per year.
Heavy equipment + forestry
6 years of serial weldments for one OEM.
Oil & gas
Flanges, pipe and valve components. Machined to spec, EU origin.
Test us small
One pilot RFQ. No commitment.
You do not need a supplier audit to find out if we are real. Pick 1 to 3 drawings, send them, get a firm number. Judge us on the quote first and the parts second.
STEP 1
Pick 1 to 3 drawings
A part that is late, badly priced, or hard to place. PDF, STEP, DWG, DXF or IGES.
STEP 2
Send to rfq@
Form below or rfq@stratosteel.com. NDA first if you prefer, signed before drawings move.
STEP 3
Reply in 1 business day
An engineer answers. Honest yes or no on fit, questions if the drawing needs them.
STEP 4
Firm number in 3 to 7 working days
Price, lead time, documentation scope. If we cannot make it competitively, we say so.
