In June 1969, a struggling company best known for making steel joists began producing its own steel in Darlington, South Carolina. Nuclear Corporation of America had staked much on the project. Its president, F. Kenneth Iverson, later recalled the decision in unusually direct terms: “We played Bet-the-Company.”
The Darlington mill melted scrap metal in an electric-arc furnace, departing from the enormous integrated plants that had long dominated steel production. Getting it to work proved difficult. As production improved and customers beyond Vulcraft began buying its steel, however, a risky supply decision became the basis for a larger steelmaking business.
Under Iverson, that business became Nucor. It moved into more demanding steel products while developing a decentralized management system that attracted attention well beyond the mills. The expansion brought industrial breakthroughs, difficult downturns and questions about the costs borne by workers.
A Quick Look at the Life of F. Kenneth Iverson
Biography Summary
F. Kenneth “Ken” Iverson (1925–2002) was an American engineer and executive who led Nuclear Corporation of America, later renamed Nucor. He directed its shift toward steelmaking, backed major mini-mill investments and championed local plant autonomy with performance-based pay. His career helped establish Nucor as a leading U.S. steel producer.
Profile
Full Name: F. Kenneth Iverson
Common Name: Ken Iverson
Born: September 18, 1925, in Downers Grove, Illinois
Died: April 14, 2002, in Charlotte, North Carolina, aged 76
Education: Bachelor’s degree in aeronautical engineering, Cornell University; master’s degree in mechanical engineering, Purdue University (1947)
Best Known For: Leading Nucor’s expansion of electric-arc mini-mill steelmaking and its move into thin-slab sheet steel
Company: Nuclear Corporation of America, later Nucor Corporation
Major Roles: President and chief executive beginning in 1965; chairman beginning in 1984
Honors: National Medal of Technology (1991); elected to the National Academy of Engineering (1994)
From Engineering Studies to the Metals Business
Iverson was born in Downers Grove, Illinois, on September 18, 1925. His early background included service in the United States Navy during World War II, from 1943 to 1946, and engineering studies at Cornell and Purdue. He earned a bachelor’s degree in aeronautical engineering from Cornell University and a master’s degree in mechanical engineering from Purdue University in 1947.
Iverson later recalled a 1947 visit to a traditional steel mill in Gary, Indiana, where he said he saw workers sleeping during a shift. In his account, the experience discouraged him from joining a large established steelmaker.
His early career crossed industrial research, metallurgy and sales. After working as a research physicist at International Harvester, he held positions at Illium Corporation, Indiana Steel Products and Cannon-Muskegon. He became executive vice president at Coast Metals in 1960.
Vulcraft Becomes the Core of a Troubled Corporation
The company Iverson would lead had roots in the REO Motor Company. By the early 1960s it was called Nuclear Corporation of America, a diversified enterprise in financial difficulty. A steel-joist manufacturer in South Carolina would become the foundation for its recovery.
In 1962, Nuclear Corporation acquired Vulcraft, a steel-joist manufacturer in Florence, South Carolina. Iverson had assessed the company as an acquisition candidate and joined in September as a vice president and general manager. Vulcraft’s founder, Sanborn Chase, had died in 1961; the acquisition involved his widow, Madge Chase, who had become the company’s president.
By 1965, Vulcraft was the parent company’s principal profitable operation while Nuclear Corporation was close to collapse. Iverson became its president and chief executive that year. He concentrated the business on steel-related operations and divested or closed failing divisions.
Finance executive Sam Siegel was among the colleagues involved in the reorganization. In 1966, the headquarters moved from Phoenix, Arizona, to Charlotte, North Carolina. Iverson kept central management small and placed substantial responsibility with plant leaders, an approach that would become a defining feature of Nucor.
Making Steel Instead of Buying It
Vulcraft needed a reliable, economical supply of steel for its joists. Iverson proposed moving upstream: the company could make its own steel from scrap in a smaller electric-arc-furnace mill rather than depending entirely on outside suppliers.
Compared with a conventional integrated steelworks, the proposed mini-mill required less up-front investment and could produce the bars and shapes Vulcraft used. Iverson sought board approval in 1966, with Siegel helping to prepare the proposal. The company built the new facility at Darlington, South Carolina.
Darlington produced its first heat of steel on June 26, 1969. Workers recruited outside the established steel industry had to learn the operation, and production setbacks strained company finances. By the end of 1970, the mill was operating substantially better. Company earnings rose in 1971 and 1972.
As the mill began supplying customers beyond Vulcraft, steelmaking became a business in its own right. Directors approved the name Nucor in 1971. The company adopted it in 1972 and began trading on the New York Stock Exchange under that name.
Expanding Mills While Keeping Headquarters Small
The Darlington project was followed by mini-mill expansion in Norfolk, Nebraska; Jewett, Texas; and Plymouth, Utah, through the 1970s and early 1980s. Nucor continued manufacturing joists and related products while developing a network of regional steel operations.
To manage the expanding operation, Iverson championed a lean central office and broad authority for plant general managers. Layers of management and executive privileges were limited. Decisions about operations could be made close to the mills rather than passing through a large corporate hierarchy.
Compensation followed the same emphasis on measured results. Production workers earned group bonuses tied to output, while managerial incentives depended on profitability and investment returns. Base wages could be comparatively low, yet productive teams sometimes earned high overall pay. The bonuses also meant earnings could fall sharply when demand or output declined.
The team-bonus idea had a history at Vulcraft: founder Sanborn Chase introduced a version that Iverson retained and developed. Contemporary reports described both strong earning opportunities and intense pressure among coworkers, especially when absences reduced a group’s bonus. Nucor’s workforce was nonunion, and the company opposed union organization.
The 1982 Downturn Tests the Pay System
The 1981–82 steel downturn tested whether Nucor’s approach could withstand a collapse in demand. Rather than routinely laying off production workers for lack of orders, the company reduced working hours and pay. Managers took larger percentage cuts than plant employees, according to contemporary accounts.
Iverson recalled that his compensation fell from about $450,000 in 1981 to roughly $110,000 in 1982. He used the example to explain his view that senior managers should share in the cuts affecting plant workers.
Workers also paid a price: keeping their jobs did not protect them from shorter schedules and reduced earnings. Nucor’s incentives rewarded output when business was strong but passed some of a downturn’s financial pressure to employees when orders weakened.
Iverson became chairman in 1984 while remaining the company’s chief executive. Nucor’s next major advance, however, would depend as much on an industrial process as on its management structure.
Moving the Mini-Mill into Sheet Steel
Mini-mills had largely served the market for bars and structural shapes. Flat-rolled sheet steel, a more demanding product, was still chiefly associated with large integrated mills. Iverson backed an effort to enter that market using compact-strip-production technology and thin-slab casting.
German specialists at SMS, including engineer Manfred Kolakowski, developed the technology. Iverson supported its costly, commercially uncertain deployment at Crawfordsville, Indiana. Keith Busse managed the project for Nucor, working with a team that included Mark Millett and the engineering suppliers.
Other expansion was also under way. In 1988, the Nucor–Yamato joint venture moved the company into structural-beam production. At Crawfordsville, the thin-slab plant started in 1989, opening a route toward sheet steel made with electric-furnace metal. Its machinery and workforce still needed difficult adjustments before the process worked reliably.
A Fatal Accident During the Crawfordsville Startup
On January 24, 1990, during the Crawfordsville startup, a ladle carrying molten steel fell after its hoisting cables failed. One employee died and five were injured, according to a U.S. Occupational Safety and Health Administration investigation summary.
Contemporary reporting described OSHA allegations of maintenance and safety violations at the plant. Nucor contested certain charges.
Even with its difficult startup, Crawfordsville demonstrated a commercially important way to make flat-rolled sheet steel in a mini-mill. The technology opened markets previously less accessible to such plants. Its technical importance sits alongside the death and injuries recorded during the startup.
Recognition as Nucor Enters New Markets
Iverson received a Purdue University honorary doctorate in 1988 and the National Medal of Technology in 1991. The medal recognized his contribution to mini-mill steelmaking and innovative slab-casting technology.
Nucor opened another sheet-steel operation at Hickman, Arkansas, in 1992, extending its new production model beyond Crawfordsville. In 1994, Iverson was elected to the National Academy of Engineering.
By 1997, Nucor had sales of about $4.18 billion and produced roughly 9.72 million tons of steel. Contemporary reporting ranked it second among U.S. steelmakers. The figures show how far the company had grown from its troubled position in the mid-1960s.
Explaining His Management Philosophy in Public
Iverson argued publicly that management, more than workers’ union status, determined a company’s ability to improve productivity. In a 1986 Inc. interview, he put it this way: “The real impediment to producing a higher-quality product more efficiently isn’t the workers, union or nonunion; it’s management.”
He urged managers to provide resources, listen to workers’ ideas and support job security. His view placed responsibility on corporate leadership, even as Nucor continued to oppose union organization.
In October 1997, Wiley published Plain Talk: Lessons from a Business Maverick, written with Tom Varian and featuring a foreword by Warren Bennis. Iverson used the book to explain his preference for fewer management layers, decisions made near the work and pay connected to results. It presented his own assessment of the system.
In a 1998 IndustryWeek interview, he offered a short defense of decentralized judgment: “People have to have the leeway to make mistakes.”
Handing Over Leadership and Leaving the Chair
Iverson handed the chief executive position to John Correnti at the end of 1995, with Correnti taking over as the 1996 business year began. Iverson remained chairman and was still speaking publicly about Nucor’s management practices in 1998.
Iverson left the chairmanship at year-end 1998, with David Aycock succeeding him on January 1, 1999. A Rutgers business-school case later characterized his departure as forced, in contrast to the retirement language used in obituary and corporate accounts.
In June 1999, Correnti resigned after a disagreement with Nucor’s board over strategic direction. His departure showed that the company’s leadership disputes extended beyond the transfer of Iverson’s titles.
A Legacy of Industrial and Organizational Change
F. Kenneth Iverson died in Charlotte, North Carolina, on April 14, 2002, at age 76. Over nearly four decades at the company, he had overseen its transformation from a struggling conglomerate into a major U.S. steel producer.
Iverson’s influence extended beyond plant expansion. Nucor’s decentralized decision-making and team bonuses became frequently discussed alternatives to traditional corporate hierarchy. The model could offer strong compensation in productive periods and a policy of avoiding layoffs for lack of work, but it also exposed employees to fluctuating pay and pressure from teammates. The company’s opposition to unions remained controversial.
The company’s achievements depended on more than one leader: Vulcraft’s earlier production practices, colleagues such as Siegel and Busse, and German engineering specialists all mattered. Iverson’s particular contribution was to guide the commercial adoption of new manufacturing methods while building a business organized around lean management and plant-level responsibility. Both the gains and the strains of that model belong in his legacy.
Timeline
These milestones trace Iverson’s education, leadership at Nucor, major steelmaking decisions and later years.
September 18, 1925
Born in Downers Grove, Illinois.
1943–1946
Serves in the U.S. Navy during World War II.
1947
Earns a master’s degree in mechanical engineering at Purdue University.
1960–1962
Becomes executive vice president of Coast Metals in 1960. Joins Nuclear Corporation of America through its acquisition of Vulcraft in 1962.
1965–1966
Becomes president and chief executive of Nuclear Corporation in 1965; the company focuses on steel-related operations. Headquarters moves to Charlotte, and planning proceeds for the Darlington mini-mill in 1966.
June 1969
The Darlington mini-mill begins producing steel, allowing Vulcraft’s parent company to manufacture a key input.
1971–1972
The Nucor name is approved in 1971 and adopted in 1972, when the company begins trading under that name on the New York Stock Exchange.
1970s–early 1980s
Nucor expands mini-mill operations to Nebraska, Texas and Utah.
1982–1984
The steel downturn brings reduced hours and compensation in 1982. Iverson becomes Nucor chairman in 1984.
1988–1989
Nucor enters the structural-beam market through the Nucor–Yamato venture in 1988; its Crawfordsville thin-slab sheet-steel mill starts in 1989.
January 24, 1990
A molten-steel ladle accident at Crawfordsville kills one worker and injures five others.
1991–1994
Iverson receives the National Medal of Technology in 1991. Nucor opens a second sheet mill at Hickman, Arkansas, in 1992. He joins the National Academy of Engineering in 1994.
1995–1997
Iverson transfers the CEO position to John Correnti at the end of 1995 while remaining chairman. Plain Talk is published in October 1997.
1998–1999
Iverson leaves the chairmanship at the end of 1998; David Aycock succeeds him in January 1999. Correnti departs as CEO in June 1999 following a board dispute.
April 14, 2002
Iverson dies in Charlotte, North Carolina, at age 76.
FAQs
Did Kenneth Iverson found Nucor?
No. Nucor developed from an older corporate predecessor, and Nuclear Corporation of America acquired Vulcraft in 1962. Iverson joined to run Vulcraft and later redirected the struggling parent company toward steelmaking.
Why did Nucor build a mini-mill at Darlington?
Vulcraft needed dependable, economical steel for its joists. The Darlington mill, which started in 1969, used scrap metal and an electric-arc furnace to produce steel internally, later selling to customers outside Vulcraft as well.
Did Iverson invent the thin-slab casting technology used at Crawfordsville?
No. The compact-strip-production equipment was developed by German engineering specialists. Iverson backed its commercial deployment at Nucor, while project leaders and technical partners worked on bringing the Crawfordsville mill into operation in 1989.
When did Kenneth Iverson retire from Nucor?
Iverson handed over the CEO position at the end of 1995, often dated to 1996, but remained chairman through 1998. David Aycock succeeded him as chairman on January 1, 1999. A Rutgers teaching case describes the latter transition as forced, while other accounts describe a retirement.
Interviews
Iverson on Delegation and Business Risk — IndustryWeek (1998)
John H. Sheridan’s late-career interview explores Iverson’s thinking on decentralized decisions, executive compensation and the risks of introducing new steelmaking technology. He was still Nucor chairman at the time, making the discussion a useful firsthand perspective on the system he had spent decades advocating.
Read the IndustryWeek interview
Iverson on Workers, Unions and Management — Inc. (1986)
This interview gives Iverson’s own explanation of why he considered management practices central to productivity. It is particularly useful for understanding how he distinguished his views about labor unions from his emphasis on workers’ ideas, resources and job security.
Richard Preston’s On-Site Reporting and Interviews — The New Yorker (1991)
Richard Preston’s two-part “Hot Metal” reportage includes interviews and firsthand accounts from Nucor’s mills. It traces the Darlington venture and the more complex Crawfordsville project, including the difficult startup and its safety consequences. These accounts illuminate the people and risks behind Nucor’s move into new types of steel.
Further Reading
Sources
- Nucor Corporation: Company history
- Nucor Museum: Vulcraft acquisition and Iverson’s appointment, Development of the first mini-mill
- American National Business Hall of Fame: Kenneth Iverson profile
- Purdue University College of Engineering: Iverson’s engineering career and honors
- AIME: F. Kenneth Iverson honoree profile
- Associated Press: Steel Magnate Kenneth Iverson Dies, Nucor CEO resigns amid board dispute
- Los Angeles Times: F. Kenneth Iverson obituary, Mini-mill operator Nucor and steel industry performance
- Inc.: Steel Man Ken Iverson (1986 interview)
- The New Yorker: Hot Metal, Part I, Hot Metal, Part II
- IndustryWeek: Tale of a ‘Maverick’ (1998 interview)
- United States Patent and Trademark Office: 1991 National Medal of Technology recipients
- Fordham University Libraries: Hogan Steel Archive
- Occupational Safety and Health Administration: Crawfordsville accident investigation summary
- Rutgers CLEO: Nucor Corporation (A, B) business teaching case
- John Wiley & Sons: Plain Talk: Lessons from a Business Maverick, original edition