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.