304 Stainless Steel
Categories: Metal; Ferrous Metal; Heat Resisting; Stainless Steel; T 300 Series Stainless Steel

Material Notes: This MatWeb entry has typical values for specimens of unknown form/heat treatment but appear to be annealed samples. We are creating other entries for more specific heat treatments and forms. Austenitic Cr-Ni stainless steel. Better corrosion resistance than Type 302. High ductility, excellent drawing, forming, and spinning properties. Essentially non-magnetic, becomes slightly magnetic when cold worked. Low carbon content means less carbide precipitation in the heat-affected zone during welding and a lower susceptibility to intergranular corrosion.

Applications: beer kegs, bellows, chemical equipment, coal hopper linings, cooking equipment, 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, nuclear vessels, oil well filter screens, refrigeration equipment, paper industry, pots and pans, pressure vessels, sanitary fittings, valves, shipping drums, spinning, still tubes, textile dyeing equipment, tubing.

Corrosion Resistance: resists most oxidizing acids and salt spray.

UNS S30400; AMS 5501, 5513, 5560, 5565; ASME SA182, SA194 (8), SA213, SA240; ASTM A167, A182, A193, A194

Key Words: aisi304, AISI 304, T304, T 304, SUS304, SS304, 304SS, 304 SS, UNS S30400, AMS 5501, AMS 5513, AMS 5560, AMS 5565, AMS 5566, AMS 5567, AMS 5639, AMS 5697, ASME SA182, ASME SA194 (8), ASME SA213, ASME SA240, ASME SA249, ASME SA312, ASME SA320 (B8), ASME SA358, ASME SA376, ASME SA403, ASME SA409, ASME SA430, ASME SA479, ASME SA688, ASTM A167, ASTM A182, ASTM A193, ASTM A194, ASTM A666, FED QQ-S-763, MILSPEC MIL-S-5059, SAE 30304, DIN 1.4301, X5CrNi189, B.S. 304 S 15, EN 58E, PN 86020 (Poland), OH18N9, ISO 4954 X5CrNi189E, ISO 683/13 11, 18-8
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Physical PropertiesMetricEnglishComments
Density 8.00 g/cc0.289 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 123123Converted from Rockwell B hardness.
Hardness, Knoop 138138Converted from Rockwell B hardness.
Hardness, Rockwell B 7070
Hardness, Vickers 129129Converted from Rockwell B hardness.
Tensile Strength, Ultimate 505 MPa73200 psi
Tensile Strength, Yield 215 MPa
@Strain 0.2 %
31200 psi
@Strain 0.2 %
Elongation at Break 70 %70 %in 50 mm
Modulus of Elasticity 193 GPa28000 ksi
Poissons Ratio 0.290.29
Shear Modulus 77.0 GPa11200 ksi
Izod Impact  150 J
@Temperature -195 °C
111 ft-lb
@Temperature -319 °F
V-Notch
 150 J
@Temperature 21.0 °C
111 ft-lb
@Temperature 69.8 °F
V-Notch
Charpy Impact 325 J240 ft-lb
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity  0.0000720 ohm-cm
@Temperature 20.0 °C
0.0000720 ohm-cm
@Temperature 68.0 °F
 0.000116 ohm-cm
@Temperature 650 °C
0.000116 ohm-cm
@Temperature 1200 °F
Magnetic Permeability 1.0201.020at RT
 
Thermal PropertiesMetricEnglishComments
CTE, linear  17.3 µm/m-°C
@Temperature 0.000 - 100 °C
9.61 µin/in-°F
@Temperature 32.0 - 212 °F
 17.8 µm/m-°C
@Temperature 0.000 - 315 °C
9.89 µin/in-°F
@Temperature 32.0 - 599 °F
 18.7 µm/m-°C
@Temperature 0.000 - 650 °C
10.4 µin/in-°F
@Temperature 32.0 - 1200 °F
Specific Heat Capacity 0.500 J/g-°C
@Temperature 0.000 - 100 °C
0.120 BTU/lb-°F
@Temperature 32.0 - 212 °F
Thermal Conductivity  16.2 W/m-K
@Temperature 0.000 - 100 °C
112 BTU-in/hr-ft²-°F
@Temperature 32.0 - 212 °F
 21.5 W/m-K
@Temperature 500 °C
149 BTU-in/hr-ft²-°F
@Temperature 932 °F
Melting Point 1400 - 1455 °C2550 - 2651 °F
Solidus 1400 °C2550 °F
Liquidus 1455 °C2651 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C <= 0.080 %<= 0.080 %
Chromium, Cr 18 - 20 %18 - 20 %
Iron, Fe 66.345 - 74 %66.345 - 74 %as balance
Manganese, Mn <= 2.0 %<= 2.0 %
Nickel, Ni 8.0 - 10.5 %8.0 - 10.5 %
Phosphorus, P <= 0.045 %<= 0.045 %
Silicon, Si <= 1.0 %<= 1.0 %
Sulfur, S <= 0.030 %<= 0.030 %

References for this datasheet.

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