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

Understanding the Sheet Metal Gauge Chart

A sheet metal gauge chart is a crucial tool in the metalworking industry, used to determine the thickness of sheet metal. The gauge number corresponds inversely to the thickness; the higher the gauge number, the thinner the metal sheet. This relationship between gauge and thickness helps manufacturers select the appropriate material for specific applications, balancing factors such as strength, weight, and cost.

Aluminum Gauge Chart for Accurate Thickness Selection

Selecting the correct aluminum gauge is vital for projects requiring specific mechanical properties. Knowing the exact thickness ensures proper functionality and durability. For instance, aerospace components often demand thicker sheets for structural integrity, whereas packaging materials might require thinner sheets to reduce weight and cost.

Using an aluminum gauge chart, engineers can match the required thickness with the corresponding gauge number, optimizing both performance and budget. For example, a gauge 7 aluminum sheet measures approximately 3.665 mm (0.1443 inches), making it suitable for heavy-duty applications like industrial equipment.

Looking for the Best Quality Sheet in Various Sizes? Explore 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 –

Popular Sheet Metal Materials

Stainless Steel Pre-plated Steel Cold Rolled Steel Copper/Brass Aluminum
400 Series 300 Series Hot-Dip Galvanized Steel Smooth 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 Cartridge Brass (Alternative) Grade 3003: Stronger, Corrosion-Resistant
Grade 430: Used Where Corrosion Resistance is Not Required Grade 304: Widely Used, Less Corrosion-Resistant        
  Good Formability and Weldability        

Applications of Sheet Metal

  • Architecture
  • Structural Components
  • Housings
  • Enclosures
  • Manufacturing
  • Cabinets
  • Construction
  • Automation

Thickness and Gauge Values Vary by Material

The gauge value serves as a standardized measure for determining sheet thickness, expressed either in inches or millimeters. Higher gauge numbers correspond to thinner sheets, while lower gauge numbers indicate thicker sheets. Non-ferrous metals, such as copper and aluminum, use a different gauge system, measured in ounces per square foot.

Explore Standard Gauges for Sheet Metal Charts Across Various Materials Below

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 the desired angle
  • Shearing
  • Laser Cutting
  • Plasma Cutting
  • Water Jet Cutting

Choice of method depends on thickness, material type, and required precision

 Done by punching press or CNC machine

Shaping 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 Size Range: 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 MM

The following brass gauge thickness information is essential for customers due to several reasons:

The thickness of brass directly influences the efficiency of the manufacturing process. For example, excessively thick brass can make it difficult to cut or shape into desired forms. Conversely, very thin brass may be prone to bending and failure under stress.

It determines the structural strength and longevity of the final product. Proper thickness ensures that the component can withstand the intended load and environmental conditions.

It also impacts the overall project cost. Not all parts require high thickness, and excessive thickness can increase production and shipping expenses unnecessarily.

Thin-gauge brass can be damaged by high heat exposure. Therefore, welders take precautions to minimize heat exposure during welding processes.

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 of metal sheets ensures uniformity in thickness, which directly impacts the toughness, longevity, and performance of the final product. A precise gauge selection allows manufacturers to meet design specifications while minimizing unnecessary material usage, leading to cost-effective solutions.

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

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