304 Stainless Steel

304 Stainless Steel

Nickel (Ni) - 8.0
Chromium (Cr) - 18.0
Iron (Fe) - 71.0 Balance
Manganese (Mn) - 1.0
Other

Key

Nickel
Copper
Chromium
Aluminum
Molybdenum
Iron
Titanium
Manganese
Cobalt
Other
  • Nickel (Ni) 8.0
  • Chromium (Cr) 18.0
  • Iron (Fe) 71.0 Balance
  • Manganese (Mn) 1.0
  • Carbon (C) 0.02
  • Silicon (Si) 0.5
  • Sulfur (S) 0.01
  • Phosphorus (P) 0.02

UNS S30400

The advantage of strain-hardened stainless fasteners is greater strength with equivalent corrosion resistance. Strain-hardened parts have the same chemistry as their non-strain-hardened counterparts. Generally, a strain-hardened stainless bolt has the same strength as a Grade 5 steel bolt. Cold working a larger diameter bar into a smaller diameter bar is the usual method used to obtain the strain-hardened properties. Excessive heat will destroy the strain-hardening. 304 and 316 Stainless are the two most common materials that are available, which have undergone this process. Other austenitic stainless can be subjected to strain hardening, however, the raw material is subject to limited availability.

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Summary

  • Environment:
    Mildly Corrosive: Salt Water & Mild Acids
  • Temperature Limit:
    1700 °F / 927 °C
  • Ultimate Tensile (Typical):
    90 ksi / 620 mpa

Specifications & Technical Data

If your question isn’t answered below, download the complete technical data sheet here.

Specifications

  • 304 Bolts: ASTM A193 Grade B8 Class 2
  • 304 Nuts: ASTM A194 Grade 8 Class 2

Applications

  • Food processing and handling
  • Heat exchangers
  • Chemical process vessels
  • Conveyors
  • Architectural
  • Pharmaceutical equipment

Physical Properties

Density  0.285 lb/in3
Melting Range  2550-2590°F
Poisson Ratio  0.3
Electrical Resistivity  28.3 µΩ • in
Coefficient of Thermal Expansion (68°F – 212°F)  9.2 µin/(in •°F)
Thermal Conductivity (212°F)  9.4 BTU/(hr•ft•°F)
Modulus of Elasticity (68°F)  29 •106 psi

Mechanical Properties

Typical Low and Elevated Temperature Properties
Temperature, °F Ultimate Tensile Strength, ksi 0.2% Yield Strength, ksi Charpy Impact V-notch, ft-lbs
-425 250 100 85
-320 230 70 85
-100 150 50
70 90 35 150
400 70 23
800 66 19
1200 48 15.5 13
1500 23 13
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Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.

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