Prepainted Steel Sheet & Coil

Protect against corrosion and pick your color with prepainted steel sheets and painted steel coil products from Alliance Steel.

Prepaint steel is a bare metal substrate or corrosion-resistant substrate that has had paint applied to one or both sides through a continuous coil coating process, which produces a uniform paint finish. The steel is uncoiled, cleaned, and chemically treated during the process. Depending on product specifications, one or both sides may then be primed and coated, oven cured, and recoiled.

Alliance Steel supplies a variety of prepainted steel sheets and coil products to meet our customer's needs. Our value-added service capabilities include slitting, shearing, stretcher leveling, blanking and cut-to-length, and metallurgical support.

Applications for Pre-Paint Steel Products

Prepainted steel is used in many applications including:

  • Metal Roofing
  • Garage Doors
  • Lighting Fixtures
  • Appliances
  • Heating and Air-Conditioning

Key Benefits for Pre-Paint Steel Sheet and Coil

Alliance Steel is proud to provide pre-painted steel sheet and coil products for any application. Our prepainted steel products offer many advantages over traditional sheets and coils, including: 

  • Superior Corrosion Protection – The factory-applied finish resists rust and weathering, extending service life.

  • Consistent Color & Finish – Uniform coatings ensure aesthetic quality across entire runs.

  • Reduced Manufacturing Costs – Eliminates the need for on-site painting, saving labor, space, and time.

  • Low Maintenance & Long Lifespan – Easy to clean and less prone to chipping or fading compared to post-painted metal.

  • Environmentally Responsible – Pre-painted steel is fully recyclable, supporting sustainability goals.

 

Pre-Painted Steel Sheet

Alliance Steel Multi-Blanking Capabilities:
Material Thickness:  .015"-.135
Max Coil:  45,000 lbs.
ID:   20”- 24”
Entry Width:  15.00”-74.00”
Exit Width:  5.00”- 74.00”
Length:  6.00”- 144”
Width/Length Tolerance:  +/-.010"
Max Coil Weight:  50,000 lbs.

 

Pre-Painted Steel Coil 

Alliance Steel Slitting Capabilities:
Material Thickness: .010"-.500"
Min/Max Slit Width: .375”- 84”
Min/Max ID: 20”- 30”
Max OD: 84"
Slit Width Tolerance: +/-.005"

 

Alliance Steel continually meets industry standards and customer requirements with a quality-first approach. As an ISO 9001:2015-certified company, Alliance Steel strives to develop lasting relationships by providing the right product on time and at a competitive price.

Contact Alliance Steel for prepainted steel sheet and coil product information and availability.

Pre-Painted Steel Grades & Properties

Alliance Steel stocks pre-painted steel coil and sheet in a variety of substrates, coatings, and color options. Contact us for current availability. Contact Alliance Steel for information on pre-painted steel products and availability.

Structural Grades C Mn P S Al Si Cu Ni Cr Mo V Cb Ti N
30,33,36,40 0.25 0.9 0.035 0.04 0.2 0.2 0.15 0.06 0.008 0.008 0.025
36T2,45-80 0.25 1.35 0.035 0.04 0.2 0.2 0.15 0.06 0.008 0.008 0.025
45T2 .02- 0.08 .30- 1.0 .03- .07 0.025 .02- .08 0.6 0.2 0.2 0.15 0.06 0.008 0.008 0.025 .01- .03

HSLA Grades C Mn P S Al Si Cu Ni Cr Mo V Cb Ti N
45C1 0.22 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005
45C2 0.15 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005
50C1 0.23 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005
50C2 & 55C2 0.15 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005
55C1 0.25 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005
60C1 & 65C1 0.26 1.5 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005
60C2 & 65C2 0.15 1.5 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005
70C1 0.26 1.65 0.04 0.04 0.2 0.2 0.15 0.16 0.005 0.005 0.005
70C2 0.15 1.65 0.04 0.04 0.2 0.2 0.15 0.16 0.005 0.005 0.005

Common Grades C Mn P S Al Si Cu Ni Cr Mo V Cb Ti N
CSA 0.1 0.6 0.03 0.035 0.2 0.2 0.15 0.06 0.008 0.008 0.025
CSB 0.02-.15 0.6 0.03 0.035 0.2 0.2 0.15 0.06 0.008 0.008 0.025
CSC 0.08 0.6 0.1 0.035 0.2 0.2 0.15 0.06 0.008 0.008 0.025
BH 0.012 1.5 0.12 0.03 0.2 0.2 0.15 0.06 0.008 0.008 0.025
FSA 0.1 0.5 0.02 0.035 0.2 0.2 0.15 0.06 0.008 0.008 0.025
FSB 0.02-.15 0.5 0.02 0.03 0.2 0.2 0.15 0.06 0.008 0.008 0.025
DDS 0.06 0.5 0.02 0.025 .01 0.2 0.2 0.15 0.06 0.008 0.008 0.025
EDDS 0.02 0.4 0.02 0.02 .01* 0.2 0.2 0.15 0.06 0.1 0.1 0.15

Frequently Asked Questions

Pre-painted steel is used across a wide range of industries, including metal roofing, canopies, paneling, automotive manufacturing, gutters and downspouts, garage doors, lighting fixtures, appliances, and heating and air conditioning equipment.
Yes, pre-painted steel can be formed, bent, or fabricated without damaging the coating, thanks to advanced coil coating techniques and high-performance paint systems designed to withstand fabrication.
Pre-painted steel consists of multiple coating layers. The substrate is the base metal, often galvanized or Galvalume, which is zinc-coated for corrosion protection. A pre-treatment layer is a chemical coating applied to improve paint adhesion. Primer enhances corrosion resistance and promotes bonding between layers. The topcoat provides color, durability, and weathering resistance.
Common topcoat options include Polyester (SMP), PVDF, Polyurethane, Acrylic, and Plastisol. Alliance Steel can help you select the right coating system for your application.
Yes, pre-painted steel is highly suitable for outdoor use. Advanced protective coatings resist fading from UV rays and weathering, making it a durable choice for exterior applications.
Due to its multi-layer system, pre-painted steel performs well in harsh or corrosive conditions. The paint layers, including pre-treatment, primer, and topcoat, block water, salt, oxygen, and other contaminants from reaching the substrate.
In many applications, the steel substrate itself is galvanized or Galvalume (zinc-coated), which acts as a sacrificial layer to protect the underlying steel from corrosion.
Galvanized steel is the substrate, with pre-painted steel providing an additional layer of protection. Pre-painted steel builds on the corrosion resistance of the galvanized or Galvalume base by adding paint layers that offer color, UV resistance, and enhanced protection against weathering.

 

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Steel Coil Production Line at Alliance Steel