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 gauge charts are essential tools used in the manufacturing industry to determine the thickness of metal sheets. These charts provide a direct relationship between the gauge number and the actual thickness, typically measured in millimeters or inches. A lower gauge number indicates a thicker sheet, while a higher number means a thinner one.

Understanding Aluminum Gauge Charts

The aluminum gauge chart is crucial for selecting the right material thickness for your project. Knowing the exact thickness helps in setting up the welding process and machinery. For example, some components require high strength and thus need a thicker sheet, while others can function with a thinner one. This ensures optimal performance and cost efficiency.

Choosing the correct gauge not only enhances the durability of the final product but also reduces production and shipping costs. Using an aluminum gauge chart allows you to make informed decisions about material selection based on your specific needs.

Aluminum Gauge Chart (in mm and inches)

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

Several materials are commonly used in sheet metal fabrication, including stainless steel, pre-plated steel, cold rolled steel, copper, brass, and aluminum. Each has unique properties that make them suitable for different applications:

  • Stainless Steel: Known for its corrosion resistance and strength, available in 300 and 400 series.
  • Aluminum: Lightweight and highly malleable, ideal for various industrial uses.
  • Copper/Brass: Conductive and durable, often used in electrical and decorative applications.
  • Pre-plated Steel: Offers enhanced corrosion resistance and is used in construction and automotive industries.

Applications of Sheet Metal

Sheet metal is widely used across multiple industries due to its versatility and durability. Some common applications include:

  • Architectural designs
  • Structural components
  • Housings and enclosures
  • Manufacturing parts
  • Cabinets and furniture
  • Construction and automation systems

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 Overview

Sheet metal fabrication involves a range of processes such as bending, cutting, punching, forming, welding, finishing, and inspection. Each step plays a vital role in shaping and assembling the final product:

  • Bending: Done using a press brake to create desired angles.
  • Cutting: Includes methods like shearing, laser cutting, and plasma cutting.
  • Punching: Performed using a punch press or CNC machine.
  • Forming: Involves stamping, rolling, and deep drawing.
  • Welding: Techniques like MIG and TIG ensure secure joints.
  • Finishing: Painting, coating, and plating protect against corrosion.
  • Inspection: Ensures dimensional accuracy and structural integrity.

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
  • Galvanised
  • Tinning
  • Anodising
  • Tempering

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

Stainless Steel Sheet Weight

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 99 108 117 126 135 144 153 162 180 198 216 234 252 270 288

How are Sheet Metal Gauges Used?

Sheet metal gauges are used to specify the thickness of a sheet, which varies depending on the material. For instance:

  • 18-gauge steel = 0.0478 inches (1.214 mm)
  • 18-gauge aluminum = 0.0403 inches (1.023 mm)

The same gauge number can represent different thicknesses based on the type of material used. Understanding this helps in choosing the right gauge for specific applications.

Advantages and Disadvantages of Sheet Metal

Advantages

  • Durable
  • High Accuracy
  • Versatility
  • Malleable
  • Rapid Prototyping
  • Lightweight
  • High Strength
  • Cost-Effective

Disadvantages

  • Cost for Complex Designs
  • Aesthetic Appearance
  • High tooling and equipment costs

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