Interstate Steel Company

a division of National Material Company

Interstate Steel Company (ISC) has been redefining value for over 70 years. Founded in 1946, and acquired by National Material L.P. in 1994, ISC continues to be a leader in providing steel services and highly engineered pre-painted products to the marketplace.

Extensive knowledge and expertise coupled with long-term relationships with steel mills, paint companies, and coil coaters, ISC has earned the trust and long-term relationships of numerous steel consuming companies, many of which have remained loyal customers for multiple decades. Recognized for their Pre-Paint Plus Initiative, Interstate Steel has a wide scope of Pre-paint and other offerings utilizing their in-house capabilities, or through their strong network of certified processing partners strategically located throughout North America and Mexico. Interstate Steel Company offers carbon flat-rolled steel, including pre-paint, zinc coated, cold rolled, and hot rolled steel. Steel services include slitting, blanking, cut-to-length, leveling, export packaging, rail and barge shipping and receiving, scrap programs, configured blanks, stamping press tooling needs, complete mechanical and metallurgical testing/metallurgical technical services, pickling, oiling, and dry-lube and hot dipped galvanizing.


  • Agriculture
  • Appliance
  • Building Products
  • Metal Stampings

  • Entry Door
  • Filters
  • Garage Door
  • Industrial Goods
  • Office Furniture
  • Solar Panel

Advantages to partnering with ISC:

Interstate Steel Company’s VA/VE team includes some of the most experienced business professionals in the world, bringing proficiency and outstanding customer service to any project. Providing just-in-time logistical services to customers operating on critical-path production timetables or manufacturers seeking to reduce their inventory carrying and handling expenses, ISC delivers an acumen for innovative solutions that are right for you. A committed workforce, state-of-the-art processing equipment and warehouse storage capabilities make ISC the company to count on for future success.

Uncompromising in its safety standards for their employees, ISC is a company that leads the way with value from start to finish. Supplying the highest quality products to the world’s leading companies, ISC’s logistical advantage results in a more efficient service to conserve our customer’s most valuable resource: cost. Our assets are in place, fully functional, and growing. ISC strives to continue their legacy to deliver a quality product with exceptional service while holding ourselves to the highest possible standard.


  • Full-line carbon flat rolled steel service center
  • North America Leader in Prepaint Applications
  • Facilitator of Post to Prepaint conversions
  • Reputation for exceptional quality and service
  • Comprehensive In-House and Independent Laboratories to Support Full Chemical and Physical Material Analysis
  • Minority Owned
  • ISO-9001 Certified


  • Cold Rolled
  • Galvanized
  • Galvalume
  • Galvanneal
  • Aluminized
  • Electro-Galvanized

  • Pre-painted  Steel
  • Hot Rolled Pickled & Oiled