Introduction
Stainless steel is used in kitchens, factories, hospitals, and buildings. Many tools, machines, and household items have some use for stainless steel. One common grade is stainless steel 304. Engineers, builders, and manufacturers use it because it is strong, long-lasting, and rust-resistant.
Weight and strength are important factors to consider when designing and making goods. Building designers need to know the part’s weight before it is cut, welded, or otherwise incorporated into a building structure. Here is where density helps.
Engineers need to understand the density of stainless steel 304. It helps them build structures, predict the amount of metal required, and control manufacturing costs.
What Is the Density of Stainless Steel 304?
The density of stainless steel 304 is 7.93 g/cm³ or 7,930 kg/m³. Many engineers approximate the value when doing design work. A typical value for working is around 8,000 kg/m³.
Several different units have the same value of density:
- 93 g/cm³
- 7,930 kg/m³
- 286 lb/in³
- 495 lb/ft³
Density is used to quantify the amount of material in a given volume. The more the density, the more mass in the same volume.
Knowing the density of stainless steel allows you to calculate the mass of the metal part. This is helpful in the design of pipes, plates, screws, and machines.
How to Calculate Weight with 304 SS Density
The formula used to calculate weight involves volume and density. It is a very simple formula used by engineers. Density is defined as mass divided by volume.
Density = Mass / Volume
The rearranged formula will look like the weight formula.
Mass = Density × Volume
The method is used to find the mass of stainless steel 304 parts. Manufacturers use the formula to accomplish many tasks, such as:
- Metal casting preparation
- Weight estimation of pipes
- Weight calculation of plates
- Structural load design
Chemical Composition of Stainless Steel 304
Stainless steel 304 is one of the members of the austenitic stainless steel family. Stainless steel 304 contains several elements. Each element affects its strength, corrosion resistance, or durability.
The following is a chemical composition of stainless steel 304 as follows:
| Element | Quantity |
| Carbon | about 0.07 percent |
| Chromium | 17.5 to 19.5 percent |
| Nickel | 8.0 to 10.5 percent |
| Manganese | up to 2 percent |
| Silicon | up to 1 percent |
| Phosphorus | up to 0.045 percent |
| Sulfur | up to 0.015 percent |
| Nitrogen | about 0.10 percent |
| Iron | balance of the material |
Key Physical & Mechanical Properties of 304 SS
Stainless steel 304 has great mechanical and physical properties. Some of them are:
| Property | Value |
| Density | 8,000 kg/m³ |
| Melting point | 1450°C |
| Thermal expansion | 17.2 × 10⁻⁶ per Kelvin |
| Thermal conductivity | 16.2 W/m·K |
| Electrical resistivity | 0.072 × 10⁻⁶ Ω·m |
| Modulus of elasticity | 193 GPa |
Mechanical properties of stainless steel 304 include:
| Property | Value |
| Yield strength | about 205 to 210 MPa |
| Tensile strength | about 505 to 745 MPa |
| Elongation | minimum 40 to 45 percent |
| Hardness | about 150 to 200 HB |
| Shear strength | about 290 to 415 MPa |
These are the reasons engineers choose stainless steel 304 for structural components and equipment.
High elongation enables the metal to stretch before it breaks. Good tensile strength allows it to withstand the pulling force of the parts. Good toughness will allow it to work well even at hot and cold temperatures.
Corrosion Resistance, Heat Resistance & Heat Treatment of 304
304 stainless steel is not simply prone to rusting. Chromium in the steel creates a protective shield that protects it from water and air. Many factories commonly use this material for their food machines, tanks, and pipes.
The chloride environment causes problems for the material. Saltwater or chemical salts can cause pitting corrosion, though it is rare. Stress corrosion cracking occurs at temperatures above 60 degrees Celsius.
It can handle extreme heat. Oxidation resistance is good up to approximately 870 degrees Celsius under intermittent heating. Continuous service temperatures are approximately 925 degrees Celsius.
Over a long period of time, between 425 degrees Celsius and 860 degrees Celsius, carbonyl causes carbide precipitation. This reduces the corrosion resistance. In cases where engineers have to weld thick parts, 304L makes welding easier.
Heating does not harden stainless steel 304. But special heating and cooling make it tough and prevent it from rusting. This is called annealing.
- Heat the steel from 1010 to 1120 degrees Celsius.
- Cool the steel rapidly after heating.
This treatment maintains 304 stainless steel’s strength and toughness, as well as its rust-free properties. The density of the stainless steel remains unchanged during this process.
Common Applications Where 304 Density Plays a Role
Many industries rely on stainless steel 304 for its strength, corrosion resistance, and stable density.
A few of the common applications include:
- Kitchen equipment
- Saucepans and cookware
- Sinks and splashbacks
- Tubing and piping systems
- Spring, screw, nut, and bolt
- Architectural panels
- Sanitary troughs and fixtures
- Food processing equipment
- Brewery equipment
- Dairy processing machines
- Pharmaceutical production equipment
Structural engineers make decisions about the heavy pipes, plates, and beams used in building design. It is important to know the right density to plan, so as to make all this safe and easy.
The materials required to create building molds must be calculated by the manufacturer. By using the density of stainless steel, they determine the mold’s volume. This helps them to know how much stainless steel they will require.
FAQs
· What is the density of 304 stainless steel in g/cm³ / kg/m³?
The density of this stainless steel 304 is about 7.93 g/cm³. It is also equal to 7930 kg/m³. Some people round it off to 8,000 kilograms per cubic meter.
· How does 304 density compare to 316?
Stainless Steel 304 has a density of about 7,930 kilograms per cubic centimeter. Stainless steel 316 is very heavy, weighing 8,030 to 8,100 kilograms per cubic meter. Although it is a bit heavier than 304 stainless steel, the difference is not significant, but it is important for complex work.
· Is 304L density the same as 304?
Yes, 304L and 304 stainless steel have almost the same density because their compositions are about 7.93 grams per cubic centimeter. 304L also contains less carbon than 304 stainless steel and is better for welding thick parts.
· What is the weight of 1 cubic meter of 304 SS?
One cubic meter of stainless steel 304 will weigh 7,930 kilograms.
Conclusion
With its widespread use in industry and daily life, 304 stainless steel has many applications. It is most notable for its rust and sturdiness. Knowing its density, an engineer can ensure that the metal is the right size.
It also contains chromium and nickel, which form a defensive layer that prevents rust. It withstands 925 degrees Celsius and has good strength and stress resistance. It is because of stainless steel 304 that many types of work can be carried out.
A few industries that use stainless steel 304 include food, chemicals, construction, and manufacturing. Knowing the correct density of stainless steel can help an engineer plan accordingly, safely, and economically.