Skip to content

SS 304L HN • UNS S30403

SS 304L HN is an austenitic Chromium-Nickel stainless steel offering the optimum combination of corrosion resistance, strength and ductility. It has been remelted by ESR refining and conditioned to produce a minimum non-metallic impurity level. This will result in a surface that is most favorable for minimizing failures during severe forming operations. The high Nickel composition provides optimum ductility and formability from the annealed temper due to low work hardening rate. The low carbon content reduces susceptibility to carbide precipitation during welding.

The alloy is readily formed in the annealed temper.SS 304L HN 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 to halogen acids.

Available Sizes:

SS 304L HN 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” (0.0508 mm) in widths of 4.0” (101.6 mm) maximum. The material conforms to ASTM A240, ASTM A666 and UNS S30403.

Nominal Composition
SS 304L HN NOMINAL COMPOSITION
Chromium 18.5%
Nickel 10.0%
Manganese 1.6%
Silicon 0.5%
Carbon 0.015%
Iron Balance


Mechanical Properties
SS 304L HN MECHANICAL PROPERTIES
ANNEALED COLD ROLLED
Ultimate Tensile Strength 100,000 PSI 210,000 PSI
Yield Strength (0.2% Offset) 40,000 PSI 190,000 PSI
Elongation in 2” * 40% 2%
Modulus of Elasticity (Tension) 28 X 106 PSI 28 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 specific melt chemistry and process variables to obtain discrete
ranges of strength and ductility. Consult Hamilton Precision Metals for desired limits to meet application need.

Physical Properties
SS 304L HN PHYSICAL PROPERTIES
Density 0.284 lbs./cu.in
Melting Point (Approx.) 1400°C
Electrical Resistivity @ R.T 72 Microhm·cm
Thermal Expansion Coeffiecient (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