Perforated Metal Sheet, Plate & Coil

MarCo Specialty Steel is your prime source for perforated metal sheet, plate and coil. Marco wants to be your ”one stop shop” for perforated metal products. Whether we are supplying one sheet of perforated metal stock or 10,000 sheets of a complete perforated, fabricated and painted part, we are your solution for all your perforating and fabricated needs. Our inventory is constantly evolving and expanding to meet the changing needs of our customers throughout the United States, Mexico and around the world. Contact one of our experienced sales staff to discuss how we can work together to meet your needs. We would be happy to discuss how we can save you time and money and offer you a consistently superior quality product through blanket contracts, and/or "JIT" programs.

Marco Specialty Steel provides full service perforating solutions for a variety of markets including mining, automotive, aggregate, laundry, medical, culinary, sunshades, lighting, architectural, industrial, sound abatement, perforated signs, shielding, infill panels, perforated ceilings, flooring and more. We offer perforated screens, sheets, coil, diffusers, plates, guards, shields, strainers, and metal filters. We offer perforated in all types of materials including stainless steel, aluminum, carbon steel, galvanized, brass, copper, plastic, paper, and foil.

Architectural Perforated Metal and Green Building Design

As the use of perforated materials broadens in building construction, architects across the country collaborate with Marco daily for fresh ideas and leading technologies. As an added bonus, our Perforated Metal products can help you achieve LEED (Leadership in Energy and Environmental Design) credits and certification meeting the following objectives.

• Reducing energy in use.
• Minimizing external pollution and environmental damage.
• Reducing embodied energy and resource depletion.
• Minimizing internal pollution and damage to health.

Marco perforated metal, made with recycled content, can help you achieve any or all of these objectives while increasing design style and reducing your budget now and in the future. Whether you use metal to do a decorative and energy-saving building façade or canopy or incorporate interior metal into wall and ceiling panels to improve air quality, you have an incredible resource in Marco Specialty Steel.

Value Added Services

Besides perforating, we offer the following additional "value added" services:

• Shearing
• Cut to Length
• Cleaning/Degreasing
• Deburring/polishing
• Slitting
• Roller-leveling
• Fabricating
• Forming/Notching
• Stamping/Blanking
• Welding
• Painting
• Coating
• Annodizing
• Time Saving
• VOC & CFC Free Cleaning
• E.D.I.
• Bar Coding

Perforated Metal is one of the most versatile and popular metal products on the market today. A fully functioning product by its shape of perforated opening and gauge and size--it can be tough in gauge and work hard at screening and filtering a variety of solids in the marketplace. On the other hand, it's same features can be lightweight in gauge, have small or large optically appealing openings and be very suitable for many architectural and display uses. For a look at some uses for perforated metal, please check the product pictures page.

Perforated Metal not only helps separate and screen solids, it diffuses light and air. If you are manufacturing a product that needs to be lighter, considering using perforated metal --- metal sheet retains a high percentage of it's strength after it's perforated but loses a lot of costly weight.

Marco Specialty Steel follows Standard Industry Trade Practices as set forth by the Industrial Perforators Association. To view these standards, click here: IPA Trade Practices

Definitions:

Thickness of Metals

• Steel: Use "Manufacturers" Standard Gauge for steel sheets.
• Stainless Steel: Use the U.S. Standard Gauge Table.
• Monel: Use the U.S. Standard Gauge Table.
• Copper, Brass or Muntz: Use the B&S Gauge Table.
• Aluminum: Use the B&S Gauge Table.

Perforations

• Round Perforations: Staggered (60 degree pattern) is standard. Variations include 45 degree staggered, and straight line pattern.
• Square Perforations: Staggered or straight line pattern.
• Slotted Perforations: Side staggered, end staggered, or straight lines. Slotted perforations will be round end slots; specify if square end slots are required.
• Other Perforations: Available upon request.

Spacing of Perforations

Spacing for large perforations will be designated be either Centers of perforations, or by the Open Area required. Spacing for small perforations will be designated by either Centers, or Open Area, or if more practical, by the Number of Perforations to the Square Inch.

Pattern of Perforations

• Staggered Perforations, both Round & Square: Direction of the stagger will normally be the short dimension of the sheet. Straight row of hole is normally parallel to long dimension of sheet.
• Slotted Perforations: The long dimension of the slots can be furnished with either the width or length of the sheet in most cases.

Margins

• Perforated Stock Size Sheets & Plates: The long sides of the sheet will be supplied with minimum margins. The short sides of the sheet will have either minimum margins or no margins.
• Sheets & Plates Re-sheared after Perforating: Special margins are available to specifications but they must carry a tolerance within the limits of the perforating tool.
• Unfinished end pattern is standard in the industry.

Flatness of Sheets & Plates

In the majority of requirements, perforated sheets or plates can be furnished to AISI flatness tolerances. Before ordering any of the following special requirements, discuss then with our sales department:

• Perforated sheets with extra wide margins.
• Blank areas required within the perforated area.
• Perforated sheets with very large percentage of open area.
• Heavy gage metal in relation to the size of the perforation.
• Special alloys.
• Stretcher leveled sheets.

Guidelines for Minimum Hole Size/Minimum Bar Width

The rule of thumb for perforating is that the hole diameter should not be less than the thickness of the material. The closer to a 1-to-1 ratio, the higher the probability of tool failure and the greater the precautions necessary to avoid it. Modifications can be made in certain instances at additional costs. For stainless steels and similar higher strength materials, it is preferable to specify at least three thickness gauges thinner than hole diameter.

The same general rule applies to bar width. The bar width should be greater than material thickness because of the increased number of punches and therefore, increased perforation tonnage. The bar width can be adjusted at increased costs.

Open Area Calculations

Staggered Round Holes	Straight Round Holes
Square Holes (Straight or Staggered)	Square End Slot
45° Staggered Centers Pattern (Special)	Hexagon
To Find the Holes per Square Inch: