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Free Forging (also known as open-die forging) is a metal forming process where heated metal is positioned between upper and lower anvils. Free from the limits of fixed molds, the metal is repeatedly forged through powerful external forces via upsetting and drawing, allowing it to extend freely in all directions while compacting the internal structure. For oversized or complex geometries, our smiths leverage versatile tooling and tailored process sequences to precisely shape the metal into its optimal blank profile.
With over 20 years of experience in free forging, the expert team at Jiangyin Eternal Heavy Industry Co., Ltd can deliver cost-effective and quality metal products to service the most demanding industries.
Open-die forging is the go-to manufacturing method for heavy-duty components and critical industrial applications, offering clear practical advantages:
No Material Limits
Open-die forging easily handles a massive range of metals and alloys, from standard carbon and stainless steels to high-alloy tool steels, aluminum, and titanium.
Maximum Strength
By repeatedly pressing the steel, the process slams shut internal porosity, refines the grain, and aligns the metal flow lines. This delivers unmatched toughness, fatigue resistance, and load-bearing capacity in the final part.
Zero Die Costs
Because it relies on flat anvils and universal shop tools rather than expensive, custom-made molds, you avoid heavy upfront tooling investments and long wait times.
Massive Scale & Freedom
There are virtually no size limits. It is the only viable way to forge oversized, heavy, or long components—such as massive shafts, rolls, and thick-walled cylinders—that simply cannot fit inside a closed die.
Flexible & Non-Standard Runs
Perfect for custom jobs, single replacements, or short production runs. Our forge masters can shift process sequences on the fly to accurately shape complex, heavy geometries to near-net dimensions.
High ROI on Low Volumes
Without the need to amortize expensive molds over thousands of parts, open-die forging makes small batch runs and prototype development highly cost-effective and highly efficient from day one.
Eternal Heavy Industry operates a 20000KN (2000-Ton) hydraulic open-die press designed for heavy-duty industrial forging. With 20+ years of manufacturing experience, we use deep-penetration forging to achieve high forging ratios, refining internal grain structures and eliminating defects in large sections up to φ1200mm. Our process guarantees 100% UT clearance and strict adherence to global compliance certifications.
Open-die forging is a core part of our metal forging capabilities and is used to produce a wide variety quality of products including:
Starting with premium, stringently tested ingots, the raw metal is heated to precise forging temperatures. Through powerful, controlled upsetting and drawing-out operations, this intensive deformation completely eliminates internal porosity, refines the crystalline grain structure, and aligns the metal’s grain flow continuously along the contours of the component.
This meticulous process allows us to deliver fully customized forged components engineered precisely to your unique drawings, material specifications, and severe-service requirements—ensuring maximum structural integrity and high impact toughness where it matters most.
• Stainless Steel: 304, 316L, 321, 17-4PH、15-5PH、12Cr13、20Cr13、30Cr13、40Cr13，2205, 2507
• Alloy Steel: Cr2 series， Cr3series, Cr5series、MC series
• Mould die steel :P20、718H、D2、H13、5CrNiMo
Powered by our 20,000 KN (2,000-ton) heavy-duty open-die hydraulic forging press, we excel in large-scale forging and shaping, with the proven capability to seamlessly process heavy-duty, large-diameter stepped shafts, forged cylinders, and complex customized forgings to meet the most demanding industrial specifications.
