Heat Treating Capabilities

FBF Limited dba Queen City Steel Treating, Cincinnati, Ohio, began in 1922 when Edwin Stenger and Bernard Stenger realized the need for a commercial heat-treating operation in the Cincinnati area.

Three generations of the Stenger family members operated the company for 74 years. In 1996 FBF Limited (doing business as Queen City Steel Treating) took over the operation in its 100,000 square foot plant. The new ownership is comprised of three partners: Judith Rudy, Michael Fourney and William Fourney. Judy is the president and operating manager of the company.

One of the company’s current goals is to become an innovator in the changing roles of the metalworking industry. This is being achieved through participation with the industries it serves, as well as with the heat-treating industry. The management team at Queen City Steel Treating serves in local, as well as national, associations and societies, which include the Metal Treating Institute, Precision Metalforming Association and the American Society of Materials. Queen City Steel Treating is also an active research and development site for Super Systems, Inc., a leading manufacturer of controls automation for the thermal processing industry, also located in the greater Cincinnati area.

Queen City Steel Treating now operates a 2000 LBS continuous mesh belt furnace line, high volume carburizing pusher line, six integral quench furnaces complete with all companion equipment.

Our processes include neutral hardening, carburizing, carbonitriding, normalizing, and ferritic nitrocarburizing. These processes, along with the secondary operations we provide turnkey services to our customer. To learn more, request a quote today.


General Capabilities
Heat Treating
Case Hardening
  • Carburizing
  • Carbonitriding
  • Ferritic Nitrocarburizing
  • Neutral Hardening Methods
    Forced Air
    Still Air
    Stress Relieving Methods
    Low Temperature
    Normalizing Methods
    Quenching Methods
    Forced Air
    Still Air
  • Continuous Mesh Belt Line· Integral Quench Batch (7 units) and Companion Equipment Low-Temperature Pit Furnace
  • 2 Row 20 Position High Volume Carburizing Pusher Furnace
  • Cryogenic Deep Freeze
  • Inspection
    Metallurgical inspection including microstructure, attribute gaging, mechanical cleaning, surface hardness, core hardness, effective and/or total case, micro structure analysis including retained austenite and intergranular oxidation.
    Quality Control
    Atmosphere and Temperature Controller Atmosphere Controller Electronic Dewpointer Electronic Uniformity Survey Box
    PGA 3500 Portable 3 Gas Analyzer Probe for Atmosphere Monitoring Superdata Software Operator Monitoring Temperature Controllers
    Additional Services Provided
    Shot Blasting (Tumble & Table)
    Rust Inhibition
    Production Volume
    High Volume
    Low Volume
    Lead Times Available
    Quoted on Job by Job Basis

    Additional Information

    Industry Focus
    Heavy Truck -On/Off Road Automotive Agricultural Appliances
    Defense Oil / Gas Mining Industry Military/Defense General Industrial
    Industry Standards
    ASME American Society of Mechanical Engineers ITAR Compliant Mil-Spec
    Military Specifications CQI-9 Compliant SAE Society of Automotive Engineers