Sheet Metal Gauge Chart

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 a Sheet Metal Gauge Chart?

Sheet metal gauges are used to define the thickness of a metal sheet. The gauge system helps in identifying how thick or thin a piece of metal is, which is crucial for manufacturing, construction, and engineering applications. A higher gauge number means a thinner sheet, while a lower number indicates a thicker one.

Understanding Aluminum Gauge Charts

The aluminum gauge chart provides accurate measurements of sheet thickness, which is essential for setting up welding processes and machinery. Different parts may require varying levels of thickness depending on their structural needs. Using the correct gauge ensures durability and cost efficiency.

Choosing the right gauge for your project can save money by avoiding unnecessary material costs. Whether you're working with thin or thick sheets, the aluminum gauge chart is an invaluable resource.

Looking for the Best Quality Sheet in Various Sizes? Check Out the Sheet Metal Gauge Chart in mm 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 –

Common Sheet Metal Materials

Stainless Steel Pre-plated Steel Cold Rolled Steel Copper/Brass Aluminum
400 series 300 series hot-dip galvanized steel used to smooth the finish hot rolled steel electrolytically tough pitch (ETP) Grade 1100: low strength
Grade 410: less corrosion resistance, heat treatable Grade 316: corrosion-resistant, maintains strength at high temperatures   available in 1018, 1008 alloys C110 or C101 weldable and ductile
Grade 430: used in applications where corrosion resistance is not required Grade 304: widely used, less corrosion-resistant     cartridge brass (alternative) Grade 3003: stronger, corrosion-resistant
  good formability and weldability        

Applications of Sheet Metal

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

Thickness and Gauge Vary by Material

The gauge value determines the thickness of a sheet in inches or millimeters. Higher gauge numbers mean thinner sheets, while lower numbers indicate thicker ones. Non-ferrous metals like copper and aluminum have different measurement units, often using ounces per square foot.

Below are standard gauge charts for various 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 Process

Sheet Metal Fabrication

Bending Cutting Punching Forming
  • bent into various shapes
  • typically done using a press brake

Created bend line and then applying force to achieve the desired angle
  • shearing
  • laser cutting
  • plasma cutting
  • water jet cutting

choice of method depends on the thickness, material type and required precision

 Done by punching press or a CNC machine

shaping the metal into desired forms

  • stamping
  • rolling
  • deep drawing
Welding Finishing Inspection  
  • MIG
  • TIG

Ensures that parts are securely attached

  • painting
  • coating
  • plating

protect against corrosion
  • dimensional accuracy
  • structural integrity
  • overall quality
  

Sheet Metal Gauge Ranges from 0/7 SWG to 50 SWG

Sheet metal gauge charts provide essential information for selecting the right thickness for your application. Understanding these gauges ensures that your project meets the necessary strength, weight, and cost requirements.

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 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
  • Galvanised
  • Tinning
  • Anodising
  • Tempering
Refer to Brass Gauge Thickness in MM

Brass gauge thickness plays a significant role in manufacturing. If the thickness is too much, it becomes difficult to cut or shape. Conversely, if it's too thin, it might bend easily or even break during the process.

The thickness also affects the structural strength and lifespan of the final product. Additionally, it impacts the overall project cost. Thicker sheets increase production and shipping expenses, so choosing the right gauge is crucial.

Thin-gauge brass is more susceptible to heat damage, so welders must be cautious when working with it.

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 Welding Techniques

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 ensures uniformity in sheet metal thickness, affecting the toughness, longevity, and performance of the final product. It also helps in achieving cost-effective solutions by avoiding excess material usage.

Stainless Steel Sheet Weight

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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 96 104 112 120 128
3000 X 1500 63 72 81 90 99 108