Material Specifications - 304 Stainless Steel

Material Specifications
304 Stainless Steel

About 304 Series Stainless Steel

304 stainless steel is the most common form of stainless steel used around the world, largely due to its excellent corrosion resistance and value. 304 is the most versatile and most widely used stainless steel, available in the widest range of products, forms and finishes. It has excellent forming and welding characteristics. It contains between 16 and 24% chromium and up to 35% nickel, as well as small amounts of carbon and manganese. 304 stainless steel has good oxidation resistance in intermittent service up to 870 °C and in continuous service up to 925 °C.


304 grade steels are known for their excellent welding and forming properties. Less electrically and thermally conductive than carbon steel and is essentially non-magnetic.


Chemical equipment, coal hopper linings, cooking equipment, railings, paneling, trim, cooling coils, cryogenic vessels, dairy equipment, evaporators, flatware utensils, feedwater tubing, flexible metal hose, food processing equipment, hospital surgical equipment, hypodermic needles, kitchen sinks, marine equipment and fasteners, oil well filter screens, refrigeration equipment, pots and pans, pressure vessels, sanitary fittings, valves, shipping drums, spinning, still tubes, tubing..

Technical Specifications

The guaranteed minimum mechanical properties of 304 Stainless Steel are tabulated below.

Physical Properties Metric
Density 8.00 g/cc
Mechanical Properties Metric
Hardness, Brinell 123
Hardness, Vickers 129
Tensile Strength, Ultimate 505 MPa
Tensile Strength, Yield 215 MPa
Elongation at Break 70%
Poissons Ratio 0.29
Modulus of Elasticity 193 GPa
Charpy Impact 325 J
Shear Modulus 77 GPa
Electrical Properties Metric
Electrical Resistivity 0.0000720 ohm-cm @ 20 °C
Magnetic Permeability 1.020
Thermal Properties Metric
CTE, linear 18.7 µm/m-°C
Specific Heat Capacity 0.500 J/g-°C
Thermal Conductivity  16.2 W/m-K
Melting Point 1400 - 1455 °C
Solidus  1400 °C
Liquidus  1455 °C
Component Elements Properties Metric
Carbon, C <= 0.080 %
Chromium, Cr 18 - 20 %
Iron, Fe 66.345 - 74 %
Manganese, Mn <= 2.0 %
Phosphorous, P <= 0.045 %
Silicon, Si <= 1.0 %
Sulfur, S <= 0.030 %