Diamond Manufacturing Company
Perforated and Value Added Metal Specialists

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Carbon Steel

Carbon steel is the most corrosive and least expensive of the three most commonly perforated metals. Produced into coil form by roller leveling it to a desired thickness, either once while the steel is still hot or again after it has cooled, each of the carbon steel types listed below is referred to as either Hot Rolled or Cold Rolled e.g., Cold Rolled Commercial Steel. The difference in processes results in products that vary in terms of cost, quality, and mechanical properties. In short, Hot Rolled is typically less expensive and produced in thicker gauges 7-16, whereas Cold Rolled provides tighter tolerances, better surface finishes, and can be produced in practically any guage. It is most often readily available in thinner gauges 14-28.

Because carbon steel is susceptible to corrosion, it is typically used in either unexposed applications or protected with a coating. Coatings such as paint and powder are applied after perforating and completely protect the material. However, zinc-based coated metals (i.e., Galvanized, Galvannealed, etc.) are produced and supplied as such from the mill and may not completely protect the material at its carbon core when exposed during the perforating process.

Commonly Perforated Carbon Steel Types

GradeDescription
Commercial Steel (HR, CR, GALV)A low-cost steel that has good drawing, forming, and welding qualities, moderate strength, but is subject to strains, fluting, and breaks due to aging. To reduce the effects caused by aging, Drawing Steel is recommended.
Drawing Steel (HR, CR)A steel with a greater degree of ductility and uniformity of properties than Commercial Steel providing improved performance during manufacturing. This type is recommended for use when stretcher strains or fluting during fabrication are objectionable or when consistency of performance is important.
Forming Steel (GALV)A steel with lower strength and higher elongation than Commercial Steel. Recommended when stresses from forming either crack or weaken Commercial Steel.

NOTE: Unless specified by the customer, Diamond Manufacturing Company reserves the right to quote and/or supply either Hot Rolled or Cold Rolled Steel — depending on what is available, economical, and commonly perforated given the size and application. If a steel type is not specified, Diamond Manufacturing Company will use Commercial Steel which is the most commonly perforated carbon steel for pricing and production.

Hot Rolled Steel
(Pickled and Oiled)
Cold Rolled Steel Electro Galv. SteelHot Dipped Galvanized Steel
Aluminized Steel
GaugeMean of GaugeMin. of GaugeMax. of GaugeMin. of GaugeMax. of GaugeLbs. Per Sq. Ft.Mean of GaugeMin. of GaugeMax. of GaugeLbs. Per Sq. Ft.Lbs. Per Sq. Ft.
7.1793.1713.1873.1713.18737.500———————————————
8.1644.1564.1724.1564.17246.875.1681.1591.17717.0316.934
9.1495.1415.1575.1415.15756.250.1532.1442.16226.4066.319
10.1345.1265.1425.1285.14055.625.1382.1292.14725.7815.701
11.1196.1116.1276.1136.12565.000.1233.1143.13235.1565.086
12.1046.0966.1126.0986.11064.375.1084.0994.11744.5314.471
13.0897.0827.0967.0847.09473.750.0934.0854.10143.9063.853
14.0747.0677.0817.0697.07973.125.0785.0705.08653.2813.238
15.0673.0613.0733.0623.07232.813.0710.0650.07702.9692.929
16.0598.0538.0658.0548.06482.500.0635.0575.06952.6562.613
17.0538.0478.0598.0498.05782.250.0575.0525.06252.4062.363
18.0478.0428.0528.0438.05182.000.0516.0466.05662.1562.113
19.0418——————.0378.04581.750.0456.0406.05061.9061.863
20.0359——————.0329.03891.500.0396.0356.04361.6561.613
21.0329——————.0299.03591.375.0366.0326.04061.5311.488
22.0299——————.0269.03291.250.0336.0296.03761.4061.363
23.0269——————.0239.02991.125.0306.0266.03461.2811.262
24.0239——————.0209.02691.000.0276.0236.03161.1561.113
25.0209——————.0179.0239.875.0247.0207.02871.0311.019
26.0179——————.0159.0199.750.0217.0187.0247.906.863
27.0164——————.0144.0184.688.0202.0172.0232.844.833
28.0149——————.0129.0169.625.0187.0157.0217.781.771
29——————————————————.0172.0142.0202.719.709
30——————————————————.0157.0127.0187.656.648

Diamond Manufacturing Company

Diamond Manufacturing is a wholly owned subsidiary of Reliance Steel & Aluminum Co.

Reliance Steel & Aluminum Co.

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