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

Material Notes: 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 include beer barrels, bellows, chemical equipment, coal hopper linings, cooling coils, cryogenic vessels, dairy equipment, evaporators, feedwater tubing, flexible metal hose, food processing equipment, hypodermic needles, nuclear vessels, oil well filter screens, refrigeration equipment, paper industry, pressure vessels, sanitary fittings, valves, shipping drums, spinning, still tubes, textile dyeing equipment, tubing.

Key Words: aisi304, AISI 304, T304, T 304, SUS304, SS304, 304SS, 304 SS, T304L, T304 L, 304L, 304 L, UNS S30403, AMS 5647, QQ-S-763, austenitic, Cr-Ni stainless steel, SAE 30304L, DIN 1.4306, X2CrNi189, B.S. 304 S 12, PN 86020 (Poland), OOH18N10, ISO 4954 X2CrNi1810E, ISO 683/13 10, 18-8
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Physical PropertiesMetricEnglishComments
Density 8.00 g/cc0.289 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Knoop 158158Converted from Rockwell B Hardness Value
Hardness, Rockwell B 8282
Hardness, Rockwell C 151510% Cold-worked
Hardness, Vickers 159159Converted from Rockwell B Hardness Value.
Tensile Strength, Ultimate 564 MPa81800 psi0% Cold-worked
Tensile Strength, Yield 210 MPa30500 psi0% Cold-worked
Elongation at Break 58 %58 %In 50mm (2 in.)
Modulus of Elasticity 193 - 200 GPa28000 - 29000 ksi
Charpy Impact 216 J159 ft-lb
 
Electrical PropertiesMetricEnglishComments
Magnetic Permeability 1.0081.008at RT
 
Thermal PropertiesMetricEnglishComments
Specific Heat Capacity 0.500 J/g-°C0.120 BTU/lb-°FEstimated based on a comparison with similar stainless steels.
Thermal Conductivity 14.0 - 16.3 W/m-K97.0 - 113 BTU-in/hr-ft²-°F
Melting Point 1400 - 1450 °C2550 - 2640 °F
Solidus 1400 °C2550 °F
Liquidus 1450 °C2640 °F
Maximum Service Temperature, Air 870 °C1600 °FIntermittent
 925 °C1700 °FContinuous Service
 
Component Elements PropertiesMetricEnglishComments
Carbon, C <= 0.030 %<= 0.030 %
Chromium, Cr 18 - 20 %18 - 20 %
Iron, Fe 64.9 - 74 %64.9 - 74 %as balance
Manganese, Mn <= 2.0 %<= 2.0 %
Nickel, Ni 8.0 - 12 %8.0 - 12 %
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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