Closed Die Forging / Impression Die Forging

Closed-die forging is a process which uses forging equipment to apply pressure to a metal billet within a die. As the metal plastically deforms and fills the die cavity, a forging with the required shape, dimensions, and quality is produced.

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Forged Components

We manufacture a wide range of closed-die forged components, including pump parts, tooling components, and fasteners.

  • Pump and Valve ComponentsPump and Valve Components
  • Tooling ComponentsTooling Components
  • FastenersFasteners
Material
  • Carbon Steel
    AISI / ASTM: 1020, 1045
    EN: C22E (1.1151), C45E (1.1191)
    JIS: S20C, S45C
  • Alloy Steel
    AISI / ASTM: 4140, 4340
    EN: 42CrMo4 (1.7225), 36CrNiMo4 (1.6511), 34CrNiMo6
    JIS: SCM440, SNCM439
  • Stainless Steel
    AISI / ASTM: 304, 316, 316L, 410, 420
    EN: 1.4301 (304), 1.4401 (316), 1.4404 (316L), 1.4006 (410), 1.4021 (420)
    JIS: SUS304, SUS316, SUS316L, SUS410, SUS420J1

Closed-die forging is primarily used for the high-volume production of small to medium-sized components.

  • Weight Range
    Ranging from a few grams (such as precision hardware components and fasteners) to several hundred kilograms (such as large high-pressure valve bodies, marine pipe fittings, and heavy-duty crankshafts).
  • Size Limitations
    Component length is typically limited to approximately 2 meters. For very large or heavy components reaching several tons such as large flanges or main shafts for offshore equipment, this equipment may not be able to provide sufficient forging force. In such cases, open-die forging or ring rolling processes are generally used.
Processes
  • Cutting
    • →
  • Billet Heating
    • →
  • Preforming / Pre-Forging
    • →
  • Final Forging
    • →
  • Trimming & Piercing
    • →
  • Straightening
    • →
  • Heat Treatment
    • →
  • Surface Cleaning
    • →
  • Inspection & Storage
Characteristics
  • High Dimensional Accuracy and Surface Quality
    Closed-die forgings provide higher dimensional accuracy and smoother surface finish than open-die forgings.
  • Excellent Mechanical Properties
    Continuous grain flow improves tensile strength, fatigue resistance, and impact toughness.
  • High Production Efficiency
    Well suited for mechanized and automated, high-volume production.
  • High Material Utilization
    Minimal machining allowance reduces material waste and improves raw material utilization.
Why Choose HCPC?
Why Choose Huacheng
  • More than 30 years of manufacturing and export experience, with extensive knowledge of international logistics and industry-specific technical standards.
  • Full support from tooling design and sample development through to high-volume production, precision machining, and surface treatment.
  • A strict ISO 9001 quality management system, backed by CMM (coordinate measuring machine) inspection and non-destructive testing (MT, RT, PT).