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SS 304L • UNS S30403

SS 304L is an austenitic Chromium-Nickel stainless steel offering the optimum combination of corrosion resistance, strength, and ductility. These attributes make it a favorite for many mechanical switch components. The low carbon content reduces susceptibility to carbide precipitation during welding.

The alloy is readily formed in the annealed temper.SS 304L may be joined by all commonly used brazing and welding methods including oxyacetylene. The corrosive resistance to acids is generally very good with the exception of halogen acids.

Available Sizes:

SS 304L is available from Hamilton Precision Metals as strip product in thicknesses from 0.0005” to 0.050” (0.0127 mm to 1.27 mm) in widths up to 12.0” (304.8 mm). It is also available in foil as thin as 0.000200” (0.00508 mm) in widths of 4.0” (101.6 mm) maximum. The material conforms to ASTM A240, ASTM A666, FED QQ-S-766, MIL-S-4043, UNS S30403.

Nominal Composition
SS 304L NOMINAL COMPOSITION
Chromium 18.2%
Nickel 8.5%
Manganese 1.6%
Silicon 0.5%
Carbon 0.015%
Iron Balance


Mechanical Properties
SS 304L MECHANICAL PROPERTIES
ANNEALED COLD ROLLED
Ultimate Tensile Strength 100,000 PSI 195,000 PSI
Yield Strength (0.2% Offset) 40,000 PSI 175,000 PSI
Elongation in 2” * 40% 2%
Modulus of Elasticity (Tension) 29 X 106 PSI 25 x 106 PSI
Poisson’s Ratio 0.29 -

*The measured elongation will be less as thickness decreases to 0.002” and less.

These values may be adjusted by control of process variables – consult HPM for desired values.

Physical Properties
SS 304L PHYSICAL PROPERTIES
Density 0.284 lbs./cu.in.
Melting Point (Approx.) 1400°C
Electrical Resistivity @ R.T. 72 Microhm·cm
Thermal Expansion Coefficient (0° to 100°C) 17.3 x 10-6/ °C
Thermal Conductivity @ 100°C 16.3 W/m·K
Magnetic Attraction
Annealed
Cold Rolled

None
Slight
Magnetic Permeability (Annealed: H = 200 oersteds) 1.02 Max.

Typical values to guide alloy selection but are not a guarantee of minimum or maximum.