California Steel Industries, Inc. (CSI)

What California Steel Industries, Inc. (CSI) does

California Steel Industries, Inc. (CSI) is a privately held flat rolled steel processing company headquartered in Fontana, California, operating a 430-acre integrated mill with over 2 million tons of annual production capacity. Founded in 1984 as a joint venture between Japan's JFE Steel (then Kawasaki Steel) and Brazil's Vale Corporation on the site of the former Kaiser Steel Mill, CSI has been majority-owned by Nucor Corporation since February 2022, with JFE Steel retaining a minority stake. CSI does not produce steel from raw iron; instead, it imports steel slabs from suppliers in Brazil, Mexico, Australia, Japan, Europe, and the United States, processing them through an 86-inch Hot Strip Mill (2M+ tons/year capacity), a 62-inch Continuous Pickling Line (1.2M tons), a 5-Stand Cold Reduction Mill (1M+ tons), two hot-dip Galvanizing Lines (800K+ tons combined), Annealing and Temper Rolling facilities (300K+ tons), and an Electric Resistance Welded (ERW) pipe operation.

The company sells five core product lines - hot rolled steel, pickled and oiled steel, cold rolled steel, galvanized steel, and ERW pipe - across the Western and Midwestern United States and select export markets. CSI's go-to-market is direct enterprise sales through industry sales representatives, supplemented by service and processing centers that slit, level, or cut steel before resale. Pricing is transactional and commodity-based, with hot rolled coil spot prices around $1,055 per short ton in early 2026 and stable 3-5 week order fulfillment times. End markets include construction (framing studs, roofing, decking, metal lath), oil and gas transmission (ERW pipe), automotive (wheels, stamping, pans), HVAC, appliances, and general manufacturing.

CSI holds ISO 9001:2015 certification across its entire product line and API Q1 certification (5CT-0361 and 5L-0279) for its pipe operations, and is recognized as the leading West Coast flat rolled steel supplier with the broadest production capabilities west of the Rocky Mountains. In December 2022, Nucor announced a $370 million investment in a planned #3 Continuous Galvanizing Line with 400,000 tons of annual capacity, which upon completion will lift total hot-dip galvanizing capacity to 1.2 million tons per year over a 30-month construction timeline following regulatory approvals.

Name

California Steel Industries, Inc. (CSI)

Legal name

California Steel Industries, Inc.

Website

https://californiasteel.com

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

501–1,000 employees

Short description

California Steel Industries is a privately held, West Coast flat rolled steel processor majority-owned by Nucor, producing over 2 million tons annually of hot rolled, pickled and oiled, cold rolled, galvanized steel, and ERW pipe at its Fontana, California mill for construction, automotive, oil and gas, and manufacturing customers.

Ownership category

akta.pro rank

Product category

Flat Rolled Steel Products

NAICS

Steel Product Manufacturing from Purchased Steel (3312), Rolling and Drawing of Purchased Steel (33122), Iron and Steel Pipe and Tube Manufacturing from Purchased Steel (33121)

SIC

Steel Works, Blast Furnaces & Rolling & Finishing Mills (3310), Steel Pipe & Tubes (3317)

akta.pro primary industry

Hot Rolling & Primary Mills (Plate, Hot-Rolled Coil/Sheet, Strip) (IMAKABAE)

akta.pro secondary industries

Steel Service Centers & Processing (Slitting, Cut-to-Length, Blanking, Leveling) (IMAKABAL), Structural Steel Fabrication (IMADACAA), Steel Products Trading & Service Centers (Flat, Long, Pipe & Tube, Rebar) (IMAKAJAB)

Keywords

• Flat rolled steel
• Hot rolled steel
• Cold rolled steel
• Galvanized steel products
• ERW pipe manufacturing

Headquarters

HQ city

Fontana

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Infrastructure, Personnel

Revenue model

1. Flat Rolled Steel Products: CSI generates revenue through the sale of flat rolled steel products including hot rolled, pickled and oiled, cold rolled, and galvanized steel. Additionally, they sell ERW pipe products. Revenue is transactional, based on commodity steel pricing with spot prices published regularly. Order fulfillment times typically 3-5 weeks.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels1 record

Core offering

California Steel Industries processes steel slabs purchased from global suppliers (Brazil, Mexico, Australia, Japan, Europe, and the U.S.) into flat rolled steel products at its Fontana, California facility. The company manufactures hot rolled, pickled and oiled, cold rolled, and galvanized steel coils, plus electric resistance welded (ERW) pipe, for industrial customers in construction, automotive, oil and gas, HVAC, and general manufacturing.

Product overview

CSI is a flat rolled steel processing company producing over 2 million tons per year across five product lines: hot rolled, pickled and oiled, galvanized, cold rolled sheet, and electric resistance welded (ERW) pipe. CSI does not manufacture steel from scratch; rather, it processes steel slabs purchased from suppliers worldwide (Brazil, Mexico, Australia, Japan, Europe, and the United States) through its Fontana, California facility. The products form an integrated production chain where hot rolled steel is processed through pickling, cold reduction, annealing, temper rolling, and galvanizing lines to produce increasingly refined steel products for construction, automotive, oil and gas, and manufacturing applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Hot Rolled Steel Hot rolled steel coil produced at the 86-inch Hot Strip Mill in gauges from 0.0538 to 0.500 inches and widths from 36 to 72 inches. Used by manufacturers of spiral weld pipe, shipping containers, tubing, metal buildings, and construction fabrication products.
• Pickled and Oiled Steel Hot rolled steel processed through a modern pickle line with tension leveling, producing flat shape and excellent surface quality. Available in gauges from 0.065 to 0.250 inches and widths from 36 to 60 inches. Used by automotive wheel, strapping, tubing, and rack system manufacturers.
• Cold Rolled Steel Cold rolled coil with high surface quality, typically coated or painted, in gauges from 0.011 to 0.134 inches and widths from 36 to 60 inches. Used in electronic cabinetry, lighting fixtures, metal office furniture, water heaters, container products, tubing, and appliances.
• Galvanized Steel Hot-dip galvanized coil with zinc coating for corrosion resistance, in gauges from 0.0098 to 0.138 inches, widths from 36 to 60 inches, with coating weights from G-30 to G-235 and A-40 to A-60 for galvannealed product. Used in tubing, culvert, and residential and commercial construction applications.
• Electric Resistance Welded (ERW) Pipe Electric resistance welded pipe known for high quality and consistent performance, available in sizes from 6-5/8 inch outside diameter to 24 inches, in gauges from 0.156 to 0.750. Principal end-users are oil and gas transmission companies for oil, gas, and water pipeline applications, including load-bearing and low-pressure uses. ISO 9001:2015 and API Q1 certified.

Quantifiable outcome

• Injury frequency rates fell more than 80 percent since 1998
• +3 more outcomes

Named customers5 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• JFE SteelcoreStrategic or Co-development Partner · 1 January 1984JFE Steel (formerly Kawasaki Steel Corporation) became a 50% shareholder along with Vale in 1984 when they purchased the old Kaiser Steel rolling mills. Following Nucor's acquisition of Vale's shares in 2022, JFE Steel remains as a 49% partner working in partnership with Nucor. JFE Steel brings innovative manufacturing expertise from Japan.

Scale indicators10 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Steel Dynamics: Steel Dynamics is one of the largest U.S. flat rolled steel producers, operating electric arc furnace sheet mills (including the recently acquired North Star Bluescope flat rolled complex). It competes directly with CSI in hot rolled, cold rolled, and galvanized sheet for construction, automotive, and energy end markets. Closest publicly traded comparable by product mix and EAF-based processing model.
• Cleveland-Cliffs: Cleveland-Cliffs acquired AK Steel in 2020 and operates major flat rolled steel facilities producing hot rolled, cold rolled, and galvanized/galvannealed sheet for automotive, construction, and appliance markets. Direct product overlap with CSI across the same flat rolled product categories serving similar end customers.
• United States Steel Corporation: U.S. Steel operates integrated and mini-mill flat rolled facilities (Big River Steel, Gary Works, Mon Valley Works) producing hot rolled, cold rolled, and galvanized sheet for automotive, construction, and pipe/tube applications. Direct competitor to CSI in flat rolled products with overlapping end-market exposure.
• BlueScope Steel: BlueScope Steel operates flat rolled and coated steel facilities in the U.S. (formerly North Star Bluescope, now part of Steel Dynamics) and produces hot rolled, cold rolled, and metallic-coated sheet for construction and manufacturing end markets. Comparable product portfolio and end-market overlap with CSI's flat rolled operations.
• Zekelman Industries (Wheatland Tube): Zekelman Industries is the largest independent steel pipe and tube manufacturer in North America, producing ERW pipe products that compete with CSI's ERW pipe operation in Western U.S. oil and gas, mechanical, and structural applications. Directly comparable on pipe product portfolio, customer base, and quality certifications (ISO/API).

Broad incumbents

• Nucor Corporation: Nucor is CSI's majority shareholder and the largest U.S. steel producer, with a diversified portfolio spanning sheet, plate, bar, structural, and joist products across 32,000+ teammates. As CSI's parent and the broader incumbent in U.S. EAF steelmaking, Nucor shapes the competitive context CSI operates within and provides scale, technology, and customer access that smaller peers cannot match.

Regional players

• Ternium: Ternium is a Latin American flat rolled steel producer with operations in Mexico and Argentina, supplying hot rolled, cold rolled, and coated steel to construction and manufacturing markets. Competes with CSI for Western U.S. cross-border steel demand from Mexican manufacturing and serves overlapping automotive and construction customers.

Emerging players

• Algoma Steel: Algoma Steel is a Canadian integrated and EAF-based flat rolled steel producer serving construction, manufacturing, and energy customers in North America. Smaller scale than CSI but with comparable flat rolled product mix, making it a relevant comparable for understanding regional North American sheet supply dynamics.
• Stelco Holdings: Stelco is a Canadian flat rolled steel producer operating modernized EAF facilities producing hot rolled and cold rolled sheet products. Comparable to CSI in product mix (flat rolled sheet) and customer base (construction, automotive, manufacturing) but with a Canadian geographic footprint and smaller scale.

Others

• Olympic Steel: Olympic Steel is a leading U.S. metal service center that processes and distributes flat rolled steel, including hot rolled, cold rolled, and galvanized products. As a downstream buyer (and in some cases competitor for end-customer relationships) of flat rolled steel producers like CSI, Olympic Steel represents the next layer of the value chain CSI sells into.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/california-steel-industries

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about California Steel Industries, Inc. (CSI)