Forged Flange Hubs
Forged steel flange hubs with a raised pilot boss, produced closed-die and finish-machined to suit the mating shaft.
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Forging Parts
Forged Flange Plates
Heavy forged flange plates with thick rims, machined on both faces and bored for high-load bolted joints.
| Forging weight | 0.5 – 25 kg per part, per die set |
|---|---|
| Tolerance | ±1.5 mm as-forged; finished to ±0.05 mm after machining |
| Heat treatment | Quench and temper, normalising or annealing — to specification |
About this part
What it is and why it is made that way
These are flange plates in the literal sense — thick, heavy discs with a machined rim and a bored centre. They carry high loads and high temperatures, so they are forged and then fully machined on both faces and around the bore. The bolt pattern is drilled and the faces faced to give a joint that repeats exactly on every flange in the set.
- Heavy forged section with high material density
- Both faces and bore machined in one setup
- Drilled bolt pattern, spot-faced or counterbored
- Material certification supplied on request
Materials
- C45 / 40Cr carbon steel
- 42CrMo alloy steel
- 20CrMnTi / 20CrMnMo gear steel
- Stainless 304 / 17-4PH
- Alloy steel 40CrNiMoA
Production processes
- Open-die forging
- Closed-die forging
- Hot and cold forging
- Heat treatment
- CNC finish machining
Typical applications
- Heavy bolted joints
- High-temperature connections
- Pressure vessel flanges
- Heavy machinery joints
Specification
Technical detail
The ranges below are what this shop typically holds. Anything tighter than the baseline is possible — send the drawing and we will confirm it against your specific tolerances rather than quote from a table.
| Forging weight | 0.5 – 25 kg per part, per die set |
|---|---|
| Tolerance | ±1.5 mm as-forged; finished to ±0.05 mm after machining |
| Heat treatment | Quench and temper, normalising or annealing — to specification |
| Material certification | Mill test certificate available on request |
| Forging ratio | Up to 4:1, per die set |
| Plate diameter | Ø150 – Ø700 mm |
| Thickness | 25 – 120 mm |
| Face flatness | ≤0.10 mm across the flange face |
Material and finish are yours to choose. The lists above are the families this part is normally made in. We will not substitute a grade or change a tolerance without telling you first — and asking.
In the same process line
Other Forging parts
If this is not quite your part, these are made on the same equipment with the same inspection.
Forged Ring Flanges
Forged ring flanges with a full-length sealing face, machined flat and parallel for a reliable gasket line.
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Forged Bolt-Circle Flanges
Forged flanges with a dense bolt-hole circle, machined and faced for high-pressure bolted connections.
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Get a quote for this part
Send the drawing and we will quote it against your material, your tolerance and your quantity. One business day, in writing, with a lead time you can plan around.