Sheet Metal Gauge Chart

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Sheet Metal Gauge Chart

Table of Contents

  • What is Sheet Metal Gauge Chart
  • Aluminum Gauge Chart
  • Popular Sheet Metal Materials
  • Sheet Metal Applications
  • Mild Steel Gauge Chart
  • Galvanized Steel Gauge Chart
  • Stainless Steel Gauge Chart
  • Copper Gauge Chart
  • Sheet Metal Fabrication
  • Steel Sheet Metal Tolerances
  • Stainless Steel Sheet Metal Gauge Chart Thickness
  • Sheet Metal Surface Finishes
  • Brass Gauge Chart
  • Sheet Metal Weldings
  • Stainless Steel Sheet Weight
  • How are Sheet Metal Gauges Used?
  • Sheet Metal Advantages and Disadvantages

What is Sheet Metal Gauge Chart

A sheet metal gauge chart is a reference tool that specifies the thickness-to-weight ratio of sheet metal. It helps manufacturers understand how the thickness of the metal affects its weight and performance. Higher gauge numbers correspond to thinner sheets, while lower numbers denote thicker ones. This is particularly useful when designing components that require specific mechanical properties without wasting material.

Understanding Aluminum Gauge Chart

Knowing the exact thickness of aluminum sheets is crucial for determining their suitability for different applications. For instance, certain parts may demand robust materials with higher strength, whereas others might only need lightweight options. Proper selection ensures optimal functionality and cost efficiency. Using an aluminum gauge chart allows you to match the correct thickness to your project needs.

While selecting appropriate gauges prevents over-engineering, it also avoids under-specifying critical areas. Too heavy or thick aluminum can drive up both production and transportation expenses unnecessarily. Therefore, understanding the nuances of aluminum gauges empowers users to strike the right balance between performance and economy.

Looking for high-quality sheets in various sizes? Explore our comprehensive sheet metal gauge charts provided in millimeters and inches below!

Aluminum Gauge Chart

Gauge No. 7 8 9 10 11 12 14 16
MM 3.665 3.264 2.906 2.588 2.305 2.053 1.628 1.291
Inches 0.1443 0.1285 0.1144 0.1019 0.09074 0.08081 0.06408 0.05082
Gauge No. 18 20 22 24 26 28 30 –
MM 1.024 0.812 0.644 0.511 0.405 0.321 0.255 –
Inches 0.0403 0.03196 0.02535 0.0201 0.01594 0.01264 0.01003 –

Popular Sheet Metal Materials

Stainless steel Pre-plated steel Cold rolled steel Copper/Brass Aluminum
400 series 300 series Hot-dip galvanized steel Smoothed hot rolled steel Electrolytically tough pitch (ETP) Grade 1100: Low strength
Grade 410: Less corrosion resistant, heat treatable Grade 316: Corrosion resistant, retains strength at high temps   Available in 1018, 1008 alloys C110 or C101 Weldable and ductile
Grade 430: Used where corrosion resistance isn't necessary Grade 304: Widely used, less corrosion resistant     Cartridge brass (alternative) Grade 3003: Stronger, corrosion resistant
  Good formability and weldability        

Sheet Metal Applications

  • Architectural
  • Structural components
  • Housings
  • Enclosures
  • Manufacturing
  • Cabinets
  • Construction
  • Automation

Actual thickness and gauge value vary based on material

The gauge value serves as an independent measure that controls the sheet thickness in terms of inches or millimeters. A higher gauge number indicates a thinner sheet. Compared to ferrous metals, non-ferrous metals have distinct gauges measured in ounces per square foot.

Below are standard gauges for sheet metal charts across different materials.

Mild Steel Gauge Chart

Gauge no. 7 8 9 10 11 12 14
MM 4.554 4.175 3.797 3.416 3.038 2.656 1.897
Inches 0.1793 0.1644 0.1495 0.1345 0.1196 0.1046 0.0747
Gauge no. 16 18 20 22 24 26 28
MM 1.518 1.214 0.911 0.759 0.607 0.454 0.378
Inches 0.0598 0.0478 0.0359 0.0299 0.0239 0.0179 0.0149

Galvanized Steel Gauge Chart

Gauge no. 8 9 10 11 12 14 16
MM 4.269 3.891 3.51 3.1318 2.753 1.9939 1.6129
Inches 0.1681 0.1532 0.1382 0.1233 0.1084 0.0785 0.0635
Gauge no. 18 20 22 24 26 28 30
MM 1.31 1.005 0.853 0.701 0.551 0.474 0.398
Inches 0.0516 0.0396 0.0336 0.0276 0.0217 0.0187 0.0157

Stainless Steel Gauge Chart

Gauge No 8 9 10 11 12 14 16
MM 4.365 3.968 3.571 3.175 2.778 1.984 1.587
Inches 0.17187 0.15625 0.14062 0.125 0.10937 0.07812 0.0625
Gauge No 18 20 22 24 26 28 30
MM 1.27 0.9525 0.7937 0.635 0.476 0.396 0.3175
Inches 0.05 0.0375 0.03125 0.025 0.01875 0.01562 0.0125

Copper Gauge Chart

Gauge No. 7 8 9 10 11 12 14 16
MM 4.572 4.191 3.759 3.404 3.048 2.769 2.108 1.651
Inches 0.18 0.165 0.148 0.134 0.12 0.109 0.083 0.065
Gauge No. 18 20 22 24 26 28 30
MM 1.245 0.889 0.711 0.559 0.457 0.356 0.305
Inches 0.049 0.035 0.028 0.022 0.018 0.014 0.012

Sheet Metal Fabrication

Sheet Metal Fabrication

Bending Cutting Punching Forming
  • Bent into various shapes
  • Typically done using a press brake

Creates bend lines and applies force to achieve desired angles
  • Shearing
  • Laser cutting
  • Plasma cutting
  • Water jet cutting

Choice depends on thickness, material type, and required precision

 Done by punching press or CNC machine

Shapes the metal into desired forms

  • Stamping
  • Rolling
  • Deep drawing
Welding Finishing Inspection  
  • MIG
  • TIG

Ensures parts are securely attached
  • Painting
  • Coating
  • Plating

Protects against corrosion
  • Dimensional accuracy
  • Structural integrity
  • Overall quality
  

Sheet metal gauge chart ranges from 0/7 SWG to 50 SWG

Steel Sheet Metal Tolerances

Gauge 10 11 12 14 16 18 20 22 24 26 28
Nominal [in] 0.1345 0.1196 0.1046 0.0747 0.0598 0.0478 0.0359 0.0299 0.0239 0.0179 0.0149
Max Size [in] 0.1405 0.1256 0.1106 0.0797 0.0648 0.0518 0.0389 0.0329 0.0269 0.0199 0.0169
Min Size [in] 0.1285 0.1136 0.0986 0.0697 0.0548 0.0438 0.0329 0.0269 0.0209 0.0159 0.0129

Stainless Steel Sheet Metal Gauge Chart Thickness

Gauge 12 11 24 16
Thickness 0.109" | 2.78mm 0.120" | 3.05 mm 0.025" | 0.64 mm 0.063" | 1.59mm
Thickness Tolerance ± 0.009 | ± 0.23mm ± 0.005 ± 0.003 | ± 0.08mm ± 0.006 | ± 0.15mm
Gauge 14 20 18 22
Thickness 0.078" | 1.98mm 0.038" | 0.95mm 0.050" | 1.27mm 0.031" | 0.79 mm
Thickness Tolerance ± 0.007 | ± 0.18mm ± 0.004 | ± 0.10mm ± 0.005 | ± 0.13mm ± 0.004 | ± 0.10mm

Sheet Metal Surface Finishes

  • Annealing
  • Galvanized
  • Tinning
  • Anodizing
  • Tempering
Refer to Brass Gauge Thickness in Millimeters

The following brass gauge thicknesses are essential for customers for several reasons:

The thickness of brass influences the efficiency of the manufacturing process. For example, excessively thick brass can be difficult to cut or shape into forms. Conversely, very thin brass may bend easily and fail under stress.

It determines the structural strength and longevity of the final product.

It impacts the cost of the project. Not all parts require high thickness, and excessive thickness can increase production and shipping costs.

Thin-gauge brass can be damaged by high heat exposure. Thus, welders minimize heat exposure during welding.

Brass Gauge Chart

Gauge No. 7 8 9 10 11 12 14 16
MM 3.665 3.264 2.906 2.588 2.305 2.053 1.628 1.291
Inches 0.1443 0.1285 0.1144 0.1019 0.09074 0.08081 0.06408 0.05082
Gauge No. 18 20 22 24 26 28 30
MM 1.024 0.812 0.644 0.511 0.405 0.321 0.255
Inches 0.0403 0.03196 0.02535 0.0201 0.01594 0.01264 0.01003

Sheet Metal Weldings

MIG Welding

MIG Welding

TIG Welding

TIG Welding

Laser Welding

Laser Welding

Stick Welding

Stick Welding

GAS Welding

Gas Welding

Plasma Arc welding

Plasma Arc Welding

Gauge sizes depend on the weight of steel, which is 41.82 pounds per square foot per inch of thickness.

This standard gauge for metal sheets is vital because it ensures uniformity in thickness. It directly affects the toughness, durability, and performance of the final product in manufacturing processes, which rely on precise designs and manufacturing techniques tailored to the required toughness and weight. It also provides a cost-effective solution by avoiding unnecessary excess material.

Stainless Steel Sheet Weight

Hollow Bar

Hollow bar, carbon steel hollow bar, alloy steel hollow bar, cold drawn hollow bar, hot rolled hollow bar

hollow bar, steel hollow bar, steel bar, round bar

Changzhou Chengxin Metal Products Co., Ltd , https://www.chengxinsteeltube.com

Weight Per Stainless Steel Sheet
Weight KG/M2 1.44 1.6 1.76 1.92 2.16 2.24 2.56 3.04 3.52 4 4.48 5.04 6 7.04 8 9.04 10 72 12
Thickness (mm) 0.18 0.2 0.22 0.24 0.27 0.28 0.32 0.38 0.44 0.5 0.56 0.63 0.75 0.88 1 .1.13 1.25 1.38 1.5
Size(mm) 2500 X 1250 – – – – – – – – 11 12.5 14 15.75 18.75 22 25 28.25 31.25 34.5 37.5
2000 X 1000 2.88 3.2 3.52 3.84 4.32 4.48 5.12 6.08 7.04 8 8.96 10.08 12 14.08 16 18.08 20 22.03 24
3000 X 1500 – – – – – – – – – – – – – – 36 40 45 50 54
Weight KG/M2 14 16 18 20 22 24 26 28 30 32 34 36 40 44 48 52 56 60 64
Thickness (mm) 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4 4.25 4.5 5 5.5 6 6.5 7 7.5 8
Size(mm) 2500 X 1250 43.75 50 56.25 62.5 68.75 75 81.25 87.5 93.75 100 106.25 112.5 125 137.5 150 162.5 175 187.5 200
2000 X 1000 28 32 36 40 44 48 52 56 60 64 68 72 80 88 96