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Forged Components
Most forged parts fall into a few families. Each family has a usual forging method, a short list of alloys and a set of tests and documents buyers expect. This page maps them.
Forged components by method, alloy and documents
Typical combinations. The drawing, the load case and the project specification decide.
| Component | Usual method | Usual alloys | Specs and checks buyers ask for |
|---|---|---|---|
| Shafts and axles | Open die, upset, radial forging | 1045, 4140, 4340, 42CrMo4, 34CrNiMo6 | ASTM A668 or EN 10250, UT to A388 or EN 10228-3, straightness |
| Pipe flanges | Closed die, open die, rolled ring | A105, A350 LF2, A182 F316L, F51 | ASME B16.5 or B16.47, marking, MTR to EN 10204 3.1 |
| Valve bodies | Closed die, open die | A105, A350 LF2, A182 F316, F51 | ASME B16.34, API 6D, hardness for sour service |
| Gear blanks | Closed die, upset, rolled ring | 8620, 20MnCr5, 18CrNiMo7-6, 4140 | Grain flow, isothermal anneal, machining stock |
| Crankshafts and camshafts | Closed die | Microalloyed steels, 4140, 42CrMo4 | Fatigue, fillet rolling, PPAP |
| Steering and suspension parts | Closed die | Microalloyed steels, 4140, aluminum 6082 | PPAP, fatigue tests, dimensional reports |
| Connecting rods | Closed die | C70S6, microalloyed steels | Weight grading, fracture split |
| Bearing and slewing rings | Rolled ring | 52100 or 100Cr6, 42CrMo4, C45 | UT, hardness, profile tolerance |
| Lifting hardware | Closed die | Alloy steels, quenched and tempered | Proof load, marking, traceability |
| Mining and earthmoving parts | Closed die, open die | Boron steels, alloy steels | Hardness, wear tests |
| Hand tools | Closed die (drop forging) | Chrome vanadium steels, 1045 | ASME B107 or ISO tool standards |
| Wellhead and pressure control parts | Open die, closed die | 4130, 4140, F22, F6NM | API 6A PSL, NACE MR0175 hardness |
Alloy and spec choices shown are common starting points, not recommendations for a given load case.
How to read the map
The component decides the forging method first. Long round parts go to open die, upset or radial forging. Repeating shapes in volume go to closed die. Rings go to ring rolling.
The service decides the alloy and the specification. Pressure parts follow piping or pressure vessel specs. Rotating and structural parts follow general forging specs with a strength class and an ultrasonic acceptance level.
The documents decide most of the price spread between quotes: heat treatment, tests, third party witness and certificate type. Write them on the RFQ so every supplier quotes the same scope.
Questions buyers ask
Which forged parts benefit most from forging over machining from bar?
Parts with shoulders, flanges or changes of section under fatigue load: shafts with flanges, crankshafts, connecting rods, hooks and knuckles. Forging keeps the grain flow along the contour and saves material on large steps.
What should an RFQ for a forged component include?
Drawing, finished weight, alloy and specification, heat treatment, tests with acceptance levels, certificate type, yearly quantity and delivery condition (as forged, rough machined or finished).
Can one supplier forge every component on this list?
Usually not. Forge shops specialise by method and weight range. A ring mill, an open die press shop and a closed die hammer shop are different suppliers, which is why matching on process and weight matters.
Have a drawing ready? Get matched.
Send the drawing with the alloy, specification and quantity. We match you with up to 3 forging suppliers and reply within 24 business hours.