304 STAINLESS STEEL ALLOY

304 STAINLESS STEEL ALLOY

304 STAINLESS STEEL ALLOY UNS: S30400 EN-DIN: 1.4301 Industries supplied include: Process equipment in mining, chemical, cryogenic, food, dairy, and pharmaceutical industries. 304 grade stainless has excellent welding and formability characteristics and is one of the most utilized stainless...
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Product Details

304 STAINLESS STEEL ALLOY

UNS: S30400
EN-DIN: 1.4301


Industries supplied include: Process equipment in mining, chemical, cryogenic, food, dairy, and pharmaceutical industries. 304 grade stainless has excellent welding and formability characteristics and is one of the most utilized stainless steels.


Nominal Composition

C:

0.07 max

Mn:

2.0 max

P:

0.045 max

S:

0.030 max

Si:

0.75 max

Cr:

17.5 – 19.5

Ni:

8.0 – 10.5

N:

0.10 max

Fe:

BAL


Physical Properties At 70°F (At 20°C)

Density
0.29 lb./in3 / (8.03 g/cm3)


Modulus of Elasticity (E)
28.0 x 103 ksi / (193 x 103MPa)


Coefficient of Expansion
9.4 x 10-6 microinches/in.-°F (70-600°F) / (16.9 μm/m-°C) (20-300°C)


Electrical Resistivity
28.4 μ ohm.in / (72 μ ohm.cm)


Thermal Conductivity
9.4 Btu-in./ft.2hr.-°F / (16.2 W/m-K)


Type 304 Stainless:
This alloy is the most frequently used alloy in the stainless steel family. These alloys may be considered for a wide variety of applications where one or more of the following properties are important:

  1. Resistance to corrosion

  2. Prevention of product contamination

  3. Resistance to oxidation

  4. Ease of fabrication

  5. Excellent formability

  6. Beauty of appearance

  7. Ease of cleaning

  8. Ready availability of a wide range of product forms.

  9. Alloy is non-magnetic


This alloy is used widely in equipment and utensils for processing and handling of food, beverages and dairy products. Heat exchangers, piping, tanks and other process equipment as well as dump bodies and truck trailers. Exposure to Hydrochloric or sulfuric acid at elevated temperatures is too aggressive for this alloy.


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