Metalworking Alternatives for Critical Applications
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Selecting the Most Appropriate Process for Demaning Applications
When selecting a metalworking process for critical components, strength, reliability and performance matter. Open-die forging and seamless-rolled-ring forging provide clear advantages over castings, machined bar, torch-cut plate and fabrications.
This white paper explains how forging improves grain flow, structural integrity and overall part performance while reducing material waste, machining time and risk. It is intended to help engineers, buyers and sourcing professionals select the most appropriate process for demanding applications
Why Forging is Often the Preferred Metalworking Process
Predictable and uniform grain structure
Near-net shapes that minimize machining
Reduced inspection and rejection rates
Improved directional and impact strength
Elimination of internal voids and porosity
Forging is a proven method for producing metal components with superior mechanical properties. During hot forging, the metal’s grain structure is refined, internal voids are consolidated and grain flow is aligned to the geometry of the part.
These characteristics result in improved directional strength, impact resistance and fatigue life when compared to other metalworking processes
Why Forging is Often the Preferred Metalworking Process
Forging is a proven method for producing metal components with superior mechanical properties. During hot forging, the metal’s grain structure is refined, internal voids are consolidated and grain flow is aligned to the geometry of the part.
These characteristics result in improved directional strength, impact resistance and fatigue life when compared to other metalworking processes
Nondestructive examination
Destructive testing
Predictable and uniform
grain structure
Near-net shapes that minimize machining
Reduced inspection and rejection rates
Improved directional and impact strength
Elimination of internal voids and porosity
Metallurgy review and support
Failure analysis
Forgings Requiring Nadcap Nondestructive Testing
Scot Forge’s Nadcap Nondestructive Testing (NDT) certification is not automatically applied to all orders which require NDT. If Nadcap NDT is required, it must be specified on the purchase order.
Forging Compared to Other Metalworking Methods
Forging vs Castings
Forging vs Fabrication
Castings may contain porosity and inconsistent grain structure. Forging consolidates the ingot center and produces sound parts with superior structural integrity and reliability.
Forgings eliminate welds, reduce inspection requirements and provide single-piece construction for improved part integrity and performance.
Forging vs Machined Bar or Plate
Machining from bar or plate interrupts grain flow and exposes grain ends. Forging maintains contoured grain flow that follows the part geometry, improving fatigue resistance and service life.
Open Die Forging
Process Overview
Open die forging shapes heated metal between flat or contoured dies without fully enclosing the material. This process allows for exceptional flexibility in size, shape and alloy selection.
Typical Open-Die Forged Components Shapes
Typical Open-Die Forged Components Shapes
Shafts and spindles
Bars and blanks
Custom shapes requiring controlled grain flow
Hollows and stepped geometries
Shafts and spindles
Bars and blanks
Custom shapes requiring controlled grain flow
Hollows and stepped geometries
Open die forgings can range from a few pounds to over one million pounds, making the process suitable for large, custom and safety-critical components.
Open die forgings can range from a few pounds to over one million pounds, making the process suitable for large, custom and safety-critical components.
Economic Advantages of Open Die and Rolled Ring Forging
Open die forgings can range from a few pounds to over one million pounds, making the process suitable for large, custom and safety-critical components.
Seamless Rolled Ring Forging Process Overview
Seamless rolled ring forging begins with an open die forged preform that is pierced and rolled to increase the diameter while reducing the wall thickness.
Advantages of Seamless Rolled Ring Forgings
Continuous circumferential grain flow
Improved fatigue strength and toughness
Capability for contoured ring geometries
Efficient material usage with no weldments or seams
Materials, Sizes & Applications
Seamless rolled rings can be produced in diameters from inches to over 300 inches and in weights up to 300,000 pounds, with dimensions tailored to application requirements
Common Forgeable Materials
Carbon and alloy steels
Stainless steel
Tool steel
Aluminum, Titanium, Nickel, Copper & Other Specialty Grades
Customer melt alloys
Industries Served
Carbon and alloy steels
Mining & Heavy Equipment
Aerospace & Defense
Gear & Power Transmission
Nuclear & Power Generation
Oil & Gas
Scot Forge Difference
At Scot Forge, we know the importance of getting your parts on-time, as expected. However, for customers new to procuring forgings, ordering a forging that will meet all specifications for end-use applications may be a challenge, which is why finding a trusted supplier and partner is essential. Our employee-owners are here to ensure your project stays on track with our forgings by offering:
Quality Assurance
Scot Forge is proud to be ISO 9001:2015 and AS9100D certified, and our team is committed to providing outstanding customer satisfaction. Further pursuance of aerospace products has led to NADCAP accreditation in both Heat Treatment for nickel material and Nondestructive Testing.
Every Scot Forge customer gets placed with a qualified team that will guide each nickel forging delivered from the inquiry stage to order placement, expediting and shipping.
We offer many size forgings in both standard and unique geometries to meet your needs.
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