AISI Type 304L Stainless Steel


Subcategory: Ferrous Metal; Heat Resisting; Metal; Stainless Steel; T 300 Series Stainless Steel

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

Component   Wt. %
CMax 0.03 
Cr18 - 20 
MnMax 2 
Ni8 - 12 
PMax 0.045 
SMax 0.03 
SiMax 1 

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.

Physical PropertiesMetricEnglishComments
Density8 g/cc0.289 lb/in 

Mechanical Properties
Hardness, Knoop158158 Converted from Rockwell B Hardness Value
Hardness, Rockwell B8282 
Hardness, Rockwell C1515 10% Cold-worked
Hardness, Vickers159159 Converted from Rockwell B Hardness Value.
Tensile Strength, Ultimate564 MPa81800 psi 0% Cold-worked
Tensile Strength, Yield210 MPa30500 psi 0% Cold-worked
Elongation at Break58 %58 % In 50mm (2 in.)
Modulus of Elasticity193 - 200 GPa28000 - 29000 ksi 
Charpy Impact216 J159 ft-lb 

Electrical Properties
Magnetic Permeability1.0081.008 at RT

Thermal Properties
Specific Heat Capacity0.5 J/g-C0.12 BTU/lb-F Estimated based on a comparison with similar stainless steels.
Melting Point1400 - 1450 C2550 - 2640 F 
Solidus1400 C2550 F 
Liquidus1450 C2640 F 
Maximum Service Temperature, Air870 C1600 F Intermittent Service
Maximum Service Temperature, Air925 C1700 F Continuous Service

References for this datasheet.


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