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SS 316LS • UNS S31673

SS 316LS is a low carbon, high nickel and molybdenum version of type 316 stainless steel approved for medical implant applications. The alloy is manufactured with higher nickel, molybdenum and chromium content than standard type 316L stainless. This balanced chemistry combined with excellent microcleanliness provided by ARC-AOD + ESR melting practice maximizes corrosion resistance and provides a ferrite free microstructure.

The alloy can be formed from the annealed temper by stamping and deep drawing. This alloy cannot be hardened by heat treatment. It must be hardened by cold working. Joining is accomplished by brazing and welding.

Available Sizes:

SS 316LS is available from Hamilton Precision Metals as strip product from 0.0005” to 0.020” (0.0127mm to 0.508 mm) in widths up to 9.0” (228.6 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 F139, ISO 5832-1 and UNS S31673.

Nominal Composition
SS 316LS NOMINAL COMPOSITION
Chromium 18.0%
Nickel 14.0%
Molybdenum 2.6%
Manganese 1.6%
Carbon 0.02%
Iron Balance


Mechanical Properties
SS 316LS MECHANICAL PROPERTIES
ANNEALED COLD ROLLED
(approx 60%)
Ultimate Tensile Strength 100,000 PSI 175,000 PSI
Yield Strength (0.2% Offset) 55,000 PSI 160,000 PSI
Elongation in 2” * 40% 4.0%
Modulus of Elasticity (Tension) 28 X 106 PSI -
Poisson’s Ratio 0.25 -

*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 316LS PHYSICAL PROPERTIES
Density 0.287 lbs/cu.in.
Melting Point (Approx.) 1370°C
Electrical Resistivity @ R.T. 74 Microhm·cm
Thermal Expansion Coefficient (0° to 100°C) 16.0 x 10-6/°C
Thermal Conductivity @ 100°C 16.3 W/m·K
Magnetic Attraction
Annealed
Cold Rolled

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

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