Stainless steel 304, along with its variant stainless steel 304L, are denoted as 1.4301 and 1.4307, respectively. The designation Type 304 signifies the utmost versatility and widespread application of this stainless steel grade. It is sometimes still referred to by its former moniker, “18/8,” which reflects its composition of 18% chromium and 8% nickel. Type 304 stainless steel falls within the austenitic category, displaying remarkable deep-draw capabilities. This attribute has established 304 as the predominant choice for various uses such as sinks and saucepans. In contrast, Type 304L is a low-carbon iteration of 304, suited for heavy-duty components that require enhanced weldability. Certain products, including plates and pipes, might be offered as “dual certified,” meeting the criteria for both 304 and 304L. For applications demanding high-temperature performance, the high-carbon variant 304H is also available. The qualities described in this data sheet are typical for ASTM A240/A240M flat-rolled products. While specifications within these standards are expected to align closely, they may not be entirely identical to the particulars provided in this data sheet.

Weight and Density of Stainless Steel 304 in kg/mm3, kg/m3 , g/cm3, lb/in3, lb/ft3

The density of stainless steel 304 is 7,930 kg/m³ or 7.93 g/cm³ (equivalent to 0.286 lb/in³). This means that the weight of 304 stainless steel is 7,930 kg per cubic meter.

Density (ρ) is determined by dividing the mass (m) of an object by its volume (V). The formula to calculate density is ρ = m/V. The unit of density in the International System of Units (SI) can be expressed in grams per cubic centimeter (g/cm³), grams per cubic decimeter (kg/dm³), or kilograms per cubic meter (kg/m³).

Stainless SteelDensity (g/cm3)Density (kg/dm3)Density (kg/m3)Density (lb/in3)Density (lb/ft3)

Why do you need to know the density of stainless steel?

To determine the weight of stainless steel, you can use ss304 density and volume. For instance:

Metal manufacturers have the capability to calculate the weight of the metal to be melted by considering the volume of the mold and the ss 304 density of the metal before casting. Similarly, for various stainless steel products like steel wire, steel plate, steel pipe, section steel, and more, their weight can be calculated based on the density of the stainless steel material.

304 Stainless Steel Physical Properties:

Density8,000 Kg/m3
Melting Point1450 °C
Thermal Expansion17.2 x 10-6 /K
Modulus of Elasticity193 GPa
Thermal Conductivity16.2W/m.K
Electrical Resistivity0.072 x 10-6 Ω .m

SS 304 Mechanical properties:

Comprehensive Strength210 MPa
Proof Stress210 Min MPa
Tensile Strength520 – 720 MPa
Elongation45 Min%

sus 304 Stainless Steel Chemical Compositions:

Element% Present
Carbon (C)0.07
Chromium (Cr)17.50 – 19.50
Manganese (Mn)2.00
Silicon (Si)1.00
Phosphorous (P)0.045
Sulphur (S)0.015b)
Nickel (Ni)8.00 – 10.50
Nitrogen (N)0.10
Iron (Fe)Balance
Density of Stainless Steel
Stainless SteelDensity (g/cm3), or specific weightDensity (kg/m3)Density (lb/in3)Density (lb/ft3)
304, 304L, 304N7.9379300.286495
316, 316L, 316N8.080000.29499
302, 302B, 302Cu7.9379300.286495
317, 317L8.080000.29499
430, 430F7.777000.28481
440 (440A, 440B, 440C)7.777000.28481

SS304 Alloy Designations:

Stainless steel grade 1.4301, commonly known as 304, corresponds to various other designations, including S30400, 304S15, 304S16, 304S31, and EN58E.

304 Stainless Steel Corrosion Resistance:

Stainless Steel 304 has excellent corrosion resistance in a variety of situations and when exposed to various corrosive agents. In chloride-rich conditions, however, it may undergo pitting and crevice corrosion. Stress corrosion cracking can also occur at temperatures exceeding 60°C.

304 SS Heat Resistance:

In intermittent service, Stainless Steel 304 demonstrates good resistance to oxidation at temperatures up to 870°C, and it can be used continuously up to 925°C. Nonetheless, extended usage between 425°C and 860°C is not recommended. For applications within this temperature range, it is advisable to use 304L due to its resistance to carbide precipitation. When high strength is required at temperatures ranging from 500°C to 800°C, grade 304H is suggested, as is water corrosion resistance.

Stainless Steel 304 Fabrication:

When working with stainless steel, including 304, it is essential to use tools specifically dedicated to stainless steel materials. Tooling and work surfaces must be thoroughly cleaned prior to use to prevent cross-contamination from easily corroded metals, which could discolour the fabricated product’s surface.

AISI 304 Stainless Steel Cold Working:

304 stainless steel is susceptible to work hardening during fabrication processes involving cold working. Therefore, it may require intermediate annealing to alleviate work hardening and prevent tearing or cracking. After fabrication, a full annealing operation should be conducted to reduce internal stresses and optimize corrosion resistance.

SS 304 Hot Working:

For fabrication methods like forging, hot working should occur after uniform heating to temperatures ranging from 1149°C to 1260°C. Following hot working, the fabricated components should be rapidly cooled to ensure maximum corrosion resistance.

SS304 Stainless Steel Machinability:

Stainless Steel 304 possesses good machinability. To enhance machining, certain rules should be followed: cutting edges must be kept sharp to prevent excess work hardening, and cuts should be light but deep enough to avoid surface work hardening. Chip breakers are recommended to ensure clear swarf removal. Due to the low thermal conductivity of austenitic alloys like 304, coolants and lubricants are necessary and should be used in substantial quantities.

304 Stainless Steel Heat Treatment:

Heat treatment cannot be used to harden 304 stainless steel. After heating the material to temperatures ranging from 1010°C to 1120°C, solution treatment or annealing can be conducted by rapidly cooling it.

Stainless Steel 304 Weldability:

Type 304 stainless steel exhibits excellent fusion welding performance with or without fillers. Grade 308 stainless steel is the recommended filler for welding 304, while grade 308L is recommended for welding 304L. In cases where heavy welded sections are involved, post-weld annealing may be necessary, though not required for 304L. For applications where post-weld heat treatment is not feasible, grade 321 filler may be used.


  • Saucepans
  • Springs, screws, nuts & bolts
  • Sinks & splashbacks
  • Architectural panelling
  • Tubing
  • Brewery, food, dairy and pharmaceutical production equipment
  • Sanitary ware and troughs

Supplied Forms:

  • Sheet
  • Strip
  • Bar
  • Plate
  • Pipe
  • Tube
  • Coil
  • Fittings

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