MS Plate Weight Calculator & Chart in Kg&lb (Online FREE)

MS Plate Weight Formula

The weight of a carbon steel plate can be calculated using various formulas, which are based on the length, width, and thickness of the steel plate. The most commonly used formula is 7.85 multiplied by the length (in meters), width (in meters), and thickness (in millimeters), and then the result is converted to kilograms or tons. For instance, if a steel plate measures 6 meters in length, 1.51 meters in width, and 9.75 millimeters in thickness, its theoretical weight can be calculated as follows: 7.85 x 6 x 1.51 x 9.75 = 693.43 kg.

Moreover, there are some specific calculation methods, such as using 85 as the density coefficient for calculation, that is, the weight of the steel plate (kg) = thickness (mm) * length (m) * width (m) * 85/1000000.

It’s important to note that the density of steel may vary due to different carbon contents. For example, the density of low carbon steel is approximately 7.85, while that of high carbon steel may be slightly lower. Therefore, when calculating the weight of a carbon steel plate, its specific carbon content should be taken into consideration, although in most cases, it can be assumed that the density of the carbon steel plate is 7.85.

Moreover, it’s important to note that the thickness dimension of a steel plate is one of the main factors affecting its load-bearing capacity. Therefore, when calculating the weight, one should ensure that the thickness value used is accurate to avoid safety risks or unnecessary waste. According to national standards, there are explicit regulations for the thickness deviation of steel plates. For example, the positive tolerance for a qualified thickness of 12mm is 1.16mm, and the negative tolerance is 0.76mm. This means that in actual applications, the thickness of the steel plate may deviate slightly. However, when calculating the weight, the theoretical weight is usually used, which is calculated based on the average of the maximum and minimum allowable thicknesses.

What is the density factor of carbon steel plates?

The density factor of carbon steel plates is approximately 7.85g/cm³. Furthermore, a specific type of carbon steel known as S50C has a recorded density of 7.84g/cm³, which is close to the density of most carbon steels. Therefore, it can be considered accurate to say that the density factor of carbon steel plates is approximately 7.85g/cm³.

MS Plate Weight Calculator in kg & lb

You can utilize the following mild steel plate weight calculator to effortlessly calculate the weight of a mild steel plate in kilograms.

Related calculator:

MS Plate Weight Chart in kg/m2 and lb/ft2

This plate weight chart applies exclusively to mild steel. For information on the gauge sizes of sheets, you can refer to the following post:

  • 1 in = 25.4 mm
  • 1 lb/ft2 = 4.88 kg/m2

Table 1: Steel Plate Thickness and Weight – Metric Units

Thickness
(mm)
Weight
(kg/m²)
Weight
(lb/ft²)
0.21.570.32
0.251.960.40
0.32.360.48
0.352.750.56
0.43.140.64
0.453.530.72
0.53.930.80
0.554.320.88
0.64.710.96
0.655.11.04
0.75.51.13
0.755.891.21
0.86.281.29
0.97.071.45
17.851.61
1.18.641.77
1.29.421.93
1.310.212.09
1.410.992.25
1.511.782.41
1.612.562.57
1.713.352.73
1.814.132.89
215.73.22
2.217.273.54
2.519.363.97
2.821.984.50
323.554.82
3.225.125.14
3.527.485.63
3.829.836.11
3.930.626.27
431.46.43
4.535.337.24
539.258.04
5.543.188.84
647.169.66
754.9511.25
862.812.86
970.6514.47
1078.616.10
1186.3517.69
1294.219.29
13102.120.91
14109.922.51
15117.7524.12
16125.625.72
18141.328.94
2015732.16
22172.735.37
24188.438.59
25196.2540.20
26204.141.80
28219.845.02
30235.548.23
32251.251.45
34266.954.67
35274.7556.27
36282.657.88
38298.361.10
4031464.31
42329.767.53
44345.470.74
45353.2572.35
46361.173.96
48376.877.17
50392.580.39
52408.283.61
54423.986.82
55431.7588.43
56439.690.04
58455.393.25

Table 2: Steel Plate Thickness and Weight – Imperial Units

Nominal Size Thickness
(inches)
Weight
(lb/ft²)
Weight
(kg/m²)
3/167.6537.35
1/410.249.80
5/1612.862.50
3/815.374.70
7/1617.987.40
1/220.499.60
9/1622.9111.81
5/825.5124.50
11/1628.1137.20
3/430.6149.40
13/1633.2162.10
7/835.7174.30
140.8199.20
1 1/845.9224.10
1 1/451249.00
1 3/856.1273.90
1 1/261.2298.80
1 5/866.3323.71
1 3/471.4348.61
1 7/876.5373.51
281.6398.41
2 1/886.7423.31
2 1/491.8448.21
2 1/2102498.01
2 3/4112546.83
3122595.66
3 1/4133649.36
3 1/2143698.19
3 3/4153747.01
4163795.84
4 1/4173844.66
4 1/2184898.37
5204996.02
5 1/22241093.66
62451196.20
6 1/22651293.84
72861396.37
7 1/23061494.02
83261591.67
93671791.85
104081992.03

As the chart indicates, there is a significant difference in weight between plates of different thicknesses.

This information is critical for applications such as construction, transportation, and heavy machinery manufacturing, where plates are used in various ways, from building structures to creating machine components.

By providing a comprehensive plate weight chart, MachineMfg enables engineers and fabricators to make accurate calculations and determine the weight of the plates they need for their projects.

This, in turn, helps them optimize their designs, select the appropriate materials, and improve the efficiency of their operations.

Related calculator: Stainless Steel Weight Calculator

What Is MS Plate?

Mild steel is an iron-carbon alloy with a carbon content ranging from 0.0218% to 2.11%. It is also called as carbon steel.

According to the carbon content in the material, we generally refer to steel with a carbon content of 0.06% to 0.25% as low-carbon steel; steel with a carbon content of 0.25% to 0.55% as medium-carbon steel; and steel with a carbon content of 0.60% to 1.03% as high-carbon steel.

(1) When the carbon content in steel exceeds 0.23%, the welding performance of the steel deteriorates. Therefore, low-alloy structural steels used for welding generally have a carbon content of no more than 0.20%.

(2) When the carbon content in steel is below 0.8%, as the carbon content increases, the strength and hardness of the steel increase while its plasticity and toughness decrease.

(3) When the carbon content is above 1.0%, as the carbon content increases, the strength of steel decreases instead. With an increase in carbon content, welding performance worsens (the special weldability can significantly decrease with steels having a higher than 0.3% carbon), cold brittleness and aging sensitivity increase, resistance to air rust corrosion decreases, making high-carbon steels susceptible to rusting when exposed to outdoor storage.

Generally, it also contains small amounts of silicon, manganese, sulfur and phosphorus. The higher the carbon content in carbon steel, the greater its hardness and strength but lower its ductility.

Types of MS Plate

(1) According to their uses, carbon steel can be divided into three categories: carbon structural steel, carbon tool steel, and easy-to-cut structural steel. Carbon structural steel is further divided into two types: engineering construction steel and machine manufacturing structural steel;

(2) According to the smelting method, it can be divided into open hearth steel and converter steel;

(3) According to the deoxidation method, it can be divided into boiling steel (F), calm-steel (Z), semi-calm-steel (b), and special calm-steel (TZ);

(4) According to the carbon content, carbon steels can be classified as low-carbon steels (WC ≤ 0.25%), medium-carbon steels (WC 0.25% – 0.6%), and high-carbon steels (WC> 0.6%);

(5) Based on quality of the material, carbon steels are categorized as ordinary carbon steels(high in phosphorus & sulfur content), high-quality carbon steels(low in phosphorus & sulfur content), advanced high-quality steels(even lower in phosphorus & sulfur content than previous category )and special grade high-quality steels.

What Are the Common Sources of Error in Carbon Steel Plate Weight Calculation?

Common sources of error in the calculation of carbon steel plate weight mainly include the following aspects:

  • Deviation of production process and equipment: Differences in production processes and equipment may lead to certain errors in steel plate thickness. This kind of error stems from instability during the production process or limitations in equipment accuracy.
  • Measurement tool error: When using a steel plate thickness gauge for measurement, if the detection surface is not parallel to the bottom surface, there are a large number of corrosion pits on the back of the measured object, or the measurement exceeds the limit, errors in the measurement results will occur.
  • Assumption of theoretical density: The calculation of the theoretical weight of the steel plate is based on a certain theoretical density estimate, but the actual density of the steel material may vary due to different components, which can also lead to discrepancies between the theoretical weight and the actual weight.
  • Deviation allowed by national standards: According to national standards, there is a certain deviation in steel materials, meaning that weight errors are permitted within a certain range during the actual production and sales process.
  • Impact of welding deformation: For low carbon steel plates that require welding processing, uneven expansion and contraction of the weld during the welding process may cause unstable deformation, which can affect the dimensions and weight of the final product.
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Shane
Author

Shane

Founder of MachineMFG

As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.

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