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, and use in surgical instruments. 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.