SS 305 is an austenitic Chromium-Nickel stainless steel with excellent corrosion resistance, and is suitable for very severe cold forming operations. A high nickel content reduces the work hardening rate so that it can be formed into electronic components and remain non-magnetic.
The alloy is readily formable and work hardens slowly.It has good resistance to nitric and sulfuric acid solutions although it will not resist halogen acids. The alloy can be satisfactorily welded, brazed, and soldered.
Available Sizes:
SS 305 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, QQS-766, and UNS S30500.
Nominal Composition
| SS 305 NOMINAL COMPOSITION |
| Chromium |
18.8%
|
| Nickel |
11.8%
|
| Manganese |
0.9%
|
| Silicon |
0.6%
|
| Carbon |
0.04%
|
| Iron |
Balance
|
Mechanical Properties
| SS 305 MECHANICAL PROPERTIES |
|
ANNEALED |
COLD ROLLED |
| Ultimate Tensile Strength |
80,000 PSI |
180,000 PSI |
| Yield Strength (0.2% Offset) |
35,000 PSI |
160,000 PSI |
| Elongation in 2” * |
55%
|
3%
|
| 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 305 PHYSICAL PROPERTIES |
| Density |
0.29 lbs./cu.in. |
| Melting Point (Approx.) |
1400°C |
| Electrical Resistivity @ R.T. |
74 Microhm·cm |
| Thermal Expansion Coefficient (0° to 100°C) |
17.3 x 10-6/°C |
|
Thermal Conductivity @ 100°C
|
16.2 W/m·K
|
| Magnetic Attraction
|
Annealed – None
|
| Magnetic Permeability @ 175 KSI (H = 100 oersteds) |
1.068
|
Typical values to guide alloy selection but are not a guarantee of minimum or maximum.