What is the Density of Stainless Steel 304?
- Fortran Steel
- Sep 20
- 8 min read
Stainless steel is a strong metal that doesn’t rust easily. It’s made by mixing iron with elements like chromium and nickel. One of the most common types is 304 stainless steel. It has about 18% chromium and 8% nickel, which helps it stay strong and resist corrosion. You might also see it called SUS 304, AISI 304, or UNS S30400.
This grade is used in kitchen sinks, food machines, SS Pipes & Tubes, and building parts. People choose it because it’s easy to work with and lasts a long time. Understanding the density of stainless steel 304 helps with better design and material planning.
In this blog, we will look at how SS 304’s density and properties impact design, weight, and material selection.
Why Does SS 304 Density Matter in Engineering?
The density of stainless steel 304 is important for engineers, fabricators, and buyers because it affects how the material performs in real-world use.
With a standard density of 7.93 g/cm³, SS 304 allows for accurate weight calculations during product design and structural planning. In construction, SS 304 is often used for cladding, frames, and support systems.
In the automotive sector, it is also found in components made from SS Hot Rolled Round Bars and SS Bright Bars. Even in cookware, density helps in designing products that heat evenly without being too heavy.
Accurate knowledge of the mass density of steel and the density for stainless steel supports better design, pricing, and sourcing decisions.
Density of Stainless Steel 304 – Full Values
The density of stainless steel 304 is typically 7.93 g/cm³, which is equal to 7930 kg/m³ or 0.286 lb/in³.
This value is measured at room temperature (around 20°C) and applies to all common forms of sheets, plates, rods, pipes, and bars, assuming solid, non-porous material.
Understanding this density helps when calculating the weight of parts during planning, machining, or transport.
Below is how the density translates across different units:
Unit | Value |
g/cm³ | 7.93 |
kg/m³ | 7930 |
lb/in³ | 0.286 |
Here’s an approximate weight per unit thickness for SS 304 sheet or plate:
Per mm thickness (1m²): 7.93 kg
Per meter (1mm thick, 1m width): 7.93 kg
Per square foot (1mm thick): ~0.737 kg
These values help with estimating load, shipping cost, and structural feasibility during design.
SS 304 Composition & Physical Properties
SS 304 Chemical Composition
The chemical makeup of stainless steel 304 gives it its well-known strength, corrosion resistance, and weldability.
Below is the standard composition range:
Element | Percentage (%) |
Chromium (Cr) | 18.0–20.0 |
Nickel (Ni) | 8.0–10.5 |
Carbon (C) | ≤ 0.08 |
Manganese (Mn) | ≤ 2.0 |
Silicon (Si) | ≤ 1.0 |
This balance of chromium and nickel gives excellent corrosion resistance and strength, which is why it’s also used in producing SS Bright Hexagonal Bars for engineering-grade precision applications.
2. Physical and Mechanical Properties
In addition to its chemical makeup, SS 304 offers reliable mechanical strength and thermal stability:
Tensile Strength: ~515 MPa
Modulus of Elasticity: 193 GPa
Thermal Expansion Coefficient: 17.2 µm/m°C
Melting Point: ~1400°C
These properties of SS 304 make it suitable for high-temperature applications, mechanical parts, and components exposed to regular wear or stress.
Weight Calculation Formulas Using SS 304
Understanding the density of stainless steel 304 allows engineers and fabricators to calculate weight accurately before cutting, transporting, or installing components. These formulas are widely used in sheet metal work, piping, and bar stock estimation.
1.Stainless Steel Plate Weight Formula
To calculate the weight of a flat SS 304 plate:
Formula:Weight (kg) = Length (m) × Width (m) × Thickness (m) × Density (kg/m³)
For SS 304, use a standard density of 7930 kg/m³.For example, a plate measuring 2m × 1m × 5mm (0.005m):2 × 1 × 0.005 × 7930 = 79.3 kg
This is how the ss plate density is applied in real-world calculations.
2. Pipe Weight per Meter
For round stainless steel pipes:
Formula:Weight (kg/m) = 0.02466 × (D² − d²) × Density
Where:
D = outer diameter (mm)
d = inner diameter (mm)
Density = 7.93 g/cm³ or 7930 kg/m³Used widely for estimating tube and pipe weight in ERW SS Pipes & Tubes.
This formula accounts for the hollow section and wall thickness of the pipe.
3. Round/Square Bar Examples
For solid round or square bars:
Formula:Weight = Cross-sectional area × Length × Density
For example, a round bar with 20 mm diameter and 1-meter length:Area = π × (D²/4) = 3.14 × (20²/4) = 314 mm² = 0.000314 m². m²Weight = 0.000314 × 1 × 7930 = 2.49 kg
For square bars, simply use: Length × Width × Height × Density
These formulas are especially helpful when working with solid profiles like SS Hot Rolled Hexagonal Bars.
These formulas help use the density of stainless steel 304 accurately when planning stock, transport, or job costing.
Summary Table of SS 304 Properties & Density
The table below highlights key physical and chemical values of 304 stainless steel. These figures are important for engineers and buyers when comparing grades or performing calculations.
Property | Value | Unit |
Density | 7930 | kg/m³ |
Melting Point | ~1400 | °C |
Modulus of Elasticity | 193 | GPa |
Composition (Cr / Ni) | 18–20 / 8–10.5 | % |
These values reflect the standard characteristics of SS 304 in its annealed condition at room temperature. In particular, stainless steel plate density is used in most design and fabrication calculations involving flat sheets, coils, and structural profiles.
Density Comparison: SS 304 vs Other Materials
When choosing a metal for engineering or manufacturing, density plays a key role in weight calculations, strength-to-weight ratio, and handling. Below is how SS 304 compares to similar materials in terms of density and typical use.
SS 304 vs SS 316
SS 316 Density: ≈ 8000 kg/m³
SS 304 Density: 7930 kg/m³
Both grades are very close in weight. However, SS 316 contains molybdenum, which improves its corrosion resistance, especially in marine or chemical settings.
That’s why it's preferred for harsher environments, even though it’s slightly heavier.
SS 304 vs Mild Steel
Mild Steel Density: ~7850 kg/m³
SS 304 Density: 7930 kg/m³
Mild steel is slightly lighter but lacks the corrosion resistance of stainless steel. It's often used in structural applications where exposure to moisture is minimal or protective coatings are applied.
SS 304 vs Aluminium
Aluminium Density: ~2700 kg/m³
SS 304 Density: 7930 kg/m³
Aluminium is almost three times lighter, which is why it’s used in aerospace and transport applications. SS 304, however, is stronger and more heat-resistant, and is often used in making SS Coils.
What are the Applications of SS 304 Based on Density
The balanced density of stainless steel 304 makes it suitable for products where both strength and manageable weight are important. It provides enough mass for durability while remaining light enough for everyday handling and fabrication.
Common applications include:
Kitchenware and cutlery: Strong, rust-resistant, and easy to clean
Pharmaceutical tanks and vessels: Maintains hygiene and resists corrosion
Medical equipment: Durable yet not overly heavy, ideal for tools and trays, Components made using SS MIG Welding Wire
Architectural panels and railings: Combines visual appeal with structural stability
These examples show how the properties of 304 stainless steel meet both practical and performance needs across sectors.
Industry-Specific Use Cases for SS 304 Density
The density of SS 304 makes it ideal for industries where both weight and durability affect performance, handling, and cost. Its balance of strength, corrosion resistance, and workability helps it fit into a wide range of applications.
Automotive & Engineering
In automotive and general engineering, SS 304 is commonly used for:
Exhaust systems
Mounting brackets
Underbody components
Used in exhausts, brackets, and components built from SS Hot Rolled Bars.Its density supports vibration control and durability without making parts unnecessarily heavy.
Construction & Fabrication
SS 304 is a popular choice for:
Hand railings
Structural beams
Support frames
The density ensures stability in load-bearing structures while maintaining a polished finish for visible elements.
Food & Beverage Equipment
In food and beverage processing, SS 304 is used in:
Pipes and flow systems
Mixing tanks
Storage containers
Used in pipes, mixers, and storage units, and also shaped into SS Wires for racks, grids, and screens. Its density works well for hygienic surfaces that need to be cleaned often and are easily moved or installed.
These applications reflect how well the stainless steel 304 material specification matches industrial needs in strength, safety, and sanitation.
Real-World Examples Based on SS 304 Density
The performance of SS 304 in real-world applications highlights how its density, strength, and thermal stability come together to deliver practical advantages.
From industrial fixtures to precision medical tools, this material proves reliable in demanding conditions.
Load-Bearing Wall Anchors SS 304 offers the ideal combination of mass and mechanical strength to support structural elements without adding excessive weight. Products like SS Square Bars and SS TMT Bars are often used to manufacture anchors for civil and architectural installations where long-term durability is critical.
Lightweight Surgical Trays In medical settings, tools must be both durable and easy to handle. SS 304 provides the right density to keep trays and instruments lightweight while withstanding frequent sterilization. SS Bright flat Bars are commonly used for such high-precision medical components due to their strength and clean surface finish.
Heat-Safe Cookware and Utensils With a melting point of approximately 1400°C, SS 304 is well-suited for high-temperature applications such as cookware, grills, and industrial kitchen equipment. Its density ensures proper weight for safe handling and heat retention without deformation.
These case examples show how SS 304 material properties especially density and heat resistance, contribute to the material’s widespread use in engineering, manufacturing, and healthcare.
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Conclusion
SS 304 remains the preferred stainless steel grade for its balance of strength, weight, and corrosion resistance. Its consistent density helps engineers and buyers make informed decisions in product design, load planning, and material handling. Whether you're sourcing sheets, pipes, or custom components, knowing how SS 304 performs by weight improves both cost and accuracy.
For trusted steel manufacturing in India and expert support, explore Fortran’s SS 304 products, including square bars, plates, and wires. Need help calculating weights or selecting material? Talk to a Fortran Steel expert today.
FAQs
1. What is the density of stainless steel 304 in kg/m³ and g/cm³?
The density of stainless steel 304 is 7930 kg/m³ or 7.93 g/cm³. This value helps calculate the weight of sheets, pipes, and bars. Need help with a weight calculation? Contact us anytime.
2. What is the standard formula to calculate stainless steel weight?
To find the weight of a stainless steel piece, use the formula: Length × Width × Thickness × Density.This works well for flat plates. Pipes and bars use slightly different formulas.
3. What are the key material properties of SS 304?
SS 304 is strong, rust-resistant, and heat-resistant. It has good flexibility, high strength, and is safe for food and medical use.
4. How does SS 304 density compare to SS 316 and aluminum?
SS 316 is a bit heavier than SS 304 and better for harsh environments. Aluminum is much lighter but not as strong or heat-resistant.
5. What is the melting point of SS 304?
The melting point of SS 304 is around 1400°C. That means it can handle high temperatures without losing shape or strength.
6. Does density change for wire, sheet, plate, or rod?
No. The density of SS 304 stays the same no matter the shape only the total weight changes based on size and type.
7. Is SS 304 strong enough for building support?
Yes. SS 304 is often used in railings, wall supports, and structures. It’s strong, long-lasting, and safe for load-bearing use. Want help selecting the right section size? We’re here to help, just get in touch.
8. What is SS 304 made of?
It’s mostly iron, with about 18% chromium and 8–10.5% nickel. It also has small amounts of carbon, manganese, and silicon.
9. Where can I buy SS 304 in India?
You can buy certified SS 304 products like sheets, bars, and wires from Fortran Steel. They’re a trusted supplier with expert support.
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