Catalyst Connection
Find manufacturersAdd your company
Catalyst Connection

Copyright 2026 Catalyst Connection

All rights reserved

Directory

  • All manufacturers
  • Maryland manufacturers
  • New York manufacturers
  • Ohio manufacturers
  • Pennsylvania manufacturers
  • West Virginia manufacturers

Company

  • About us
  • Blog
  • Contact us

Support

  • Terms of service
  • Privacy policy

Stay up to date

Get regional manufacturing news, events, and resources from Catalyst Connection.

Subscribe to the newsletter
Back to results
  1. Home
  2. ›
  3. Manufacturers
  4. ›
  5. Pennsylvania
  6. ›
  7. United States Steel Corporation
United States Steel Corporation logo

United States Steel Corporation

Claim this profile
Braddock, PA 15104
412-433-1121
Visit website

At a glance

Employee size
10,001+
Organization type
Public Company
Headquarters
Braddock, PA
Founded
1901

About

For 125 years, United States Steel Corporation has made the steel that goes into bridges, buildings, vehicles and appliances, operating an extensive network of American production sites from its Pittsburgh headquarters. Its footprint spans the full steelmaking chain, from Minnesota iron-ore pellet operations to the 7.5-million-ton Gary Works and the mini-mill operations of Big River Steel. Big River Steel is also the first steel producer in North America to receive ResponsibleSteel site certification, underscoring U. S. Steel’s push toward more sustainable steelmaking.

Capabilities and markets

Products

Manufacturing processes

Materials worked

Service offerings

Economic activities

End markets served

Energy segments

Natural GasSolar

Directory supply chains

Classification

NAICS codes

Certifications and registrations

Certifications

  • ISO 45001:2018

  • ISO 14001

  • ISO/IEC 17025

  • ISO 9001

  • IATF 16949

  • PED

  • API Q1/5L

  • API Q1/5CT

  • API 5CT

  • API 5L

  • ResponsibleSteel™ Site Certification

  • OSHA Voluntary Protection Program (VPP)

    Compliance program

  • ISO17025

    Quality certification

  • OSHAVPP

    Quality certification

Related manufacturers

  • Nucor Corporation logoNucor CorporationNucor Corporation manufactures steel and fabricated steel products and is also a major steel recycler. The company says it grew from its first mini mill in 1969 to North America’s largest and most diversified steel manufacturer, with a network of 27 steel mills and more than 300 facilities across North America. Its electric arc furnace steelmaking process uses recycled scrap to make new steel.WEST HAZLETON, PA
  • GCM Steel logoGCM SteelGCM Steel is a Brooklyn steel manufacturer established in 1971. Its site identifies the company as an NYC DOT approved manufacturer and states that all its products are made in the United States.BROOKLYN, NY
  • JM Steel logoJM SteelSince beginning production in 2000, JM Steel has processed flat-rolled steel into coils, blanks, formed parts and other products at facilities across the United States. Its newer solar operation produces domestic steel tubing for tracking systems, with Texas and Pennsylvania locations together capable of more than 8,000 tons per month. JM Steel is an affiliate of Jennmar, and its South Carolina and Texas quality management systems are certified to ISO 9001:2015.LEETSDALE, PA
  • ArcelorMittal North America logoArcelorMittal North AmericaArcelorMittal North America is the North American operations of global steelmaker and mining company ArcelorMittal, serving customers in Canada, the United States and Mexico. Its regional footprint includes 40 production and processing facilities, two R&D centers, and 19,000 employees; operations make advanced steel products for major industrial markets and energy-transition technologies.SHELBY, OH
More manufacturers in Pennsylvania

Contact information

Website

ussteel.com

Phone numbers

  • 412-433-1121
  • 877-877-4586

Social

Locations

United States Steel Corporation location map for 13TH ST AND BRADDOCK AVE

13th St And Braddock Ave

Braddock, PA 15104

Allegheny County

Get directions
United States Steel Corporation location map for 2027 STATE HWY 198

2027 State Hwy 198

Osceola, AR 72370

Mississippi County

Get directions
United States Steel Corporation location map for 1951 STATE ST

1951 State St

Granite City, IL 62040

Madison County

Get directions
United States Steel Corporation location map for ONE N BROADWAY

One N Broadway

Gary, IN 46402

Lake County

Get directions
United States Steel Corporation location map for P O BOX 471

P O Box 471

Pittsburg, CA 94565

Contra Costa County

Get directions
1 of 5

Is this your company?

Claim this profile to keep it up to date, showcase your capabilities, and reach new buyers.

Claim this profile

Directory source

Source
ussteel.com
Updated
Sep 2026