Closed Die Forging — Strong, Near-Net-Shape Parts
Closed die forging squeezes heated metal into a shaped die, aligning the grain flow along the part’s profile. The result is a component that is stronger, tougher and more fatigue-resistant than a casting or a machined billet of the same shape.
Why Forged Parts Are Stronger
Forging deforms the metal and aligns its grain flow along the part profile, eliminating internal voids and refining the structure. For parts under load — levers, yokes, rods, flanges, gears — this translates directly to longer life and lower failure risk.
| Parameter | Typical capability |
|---|---|
| Materials | Carbon steel (45#, 40Cr), alloy steel (42CrMo/4140, 20CrMnTi), stainless (304/316) |
| Part weight | 0.1 kg – 50 kg |
| Dimensional tolerance | GB/T 12362 forging tolerance, machining to drawing |
| Key advantage | Grain-flow alignment, no porosity, high strength-to-weight |
| Tooling | Die set, amortised over the run |
Materials & Heat Treatment
| Material | Common grades | Typical heat treatment |
|---|---|---|
| Carbon steel | 45# (1045), Q345 | Normalising, quenching & tempering |
| Alloy steel | 40Cr (5140), 42CrMo (4140), 20CrMnTi | Quenching & tempering, carburising |
| Stainless steel | 304, 316, 17-4PH | Solution annealing |
From Billet to Finished Forging
We forge, trim, heat-treat, machine and inspect under one roof. A German OEM partner has sourced closed-die forged components from us for over five years at an annual volume of 420,000 parts — a working proof of the repeat quality and delivery we hold.
Inspection & Documents
- Material certificate (spectrometry)
- Mechanical property tests (tensile, impact, hardness)
- Ultrasonic / magnetic particle on request
- Dimensional report against drawing
Lead Time & MOQ
- Die making: 20–35 天
- Sample: 20–30 天
- Production: 25–40 天
- MOQ: 100 pcs
FAQ
Is forging better than casting for my part?
If the part is under dynamic or impact load, forging is usually stronger because of grain-flow alignment. For complex geometry at lower cost, casting wins. We make both, so we will recommend honestly against your application.
Can you forge to my existing drawing?
Yes — send the drawing and we confirm the die design, material and tolerance before quoting.
Do you machine the forging?
Yes, machining, heat treatment and finishing are done in-house for cast-to-print or forge-to-print delivery.
Send your drawing, quantity and target delivery date.
Related: Open Die Forging · Cold Forging & Extrusion · Rolled Ring Forgings · All Forgings
