Sep 26 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Introduction
Stainless steels are known as high-alloy steels. They are divided
into four groups that include martensitic, austenitic, ferritic and
precipitation-hardened steels.
Stainless steels contain good corrosion resistance in comparison
with other steels because they contain larger amounts of chromium of
about 10%.
The following datasheet provides an overview of grade 384 stainless
steel.
Chemical Composition
The chemical composition of grade 384 stainless steel is outlined in
the following table.
| Element |
Content
(%) |
| Iron, Fe |
63 |
| Nickel, Ni |
18 |
| Chromium, Cr |
16 |
| Manganese, Mn |
2.0 |
| Silicon, Si |
1.0 |
| Carbon, C |
0.080 |
| Phosphorous, P |
0.045 |
| Sulfur, S |
0.030 |
Physical Properties
The following table shows the physical properties of grade 384
stainless steel.
| Properties |
Metric |
Imperial |
| Density |
8.00 g/cm3 |
0.289 lb/in³ |
Mechanical Properties
The mechanical properties of grade 384 annealed stainless steel are
displayed in the following table.
| Properties |
Metric |
Imperial |
| Tensile strength |
515 MPa |
74700 psi |
| Yield strength (@strain 0.200%) |
240 MPa |
34800 psi |
| Elastic modulus |
193 GPa |
28000 ks |
| Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
| Elongation at break (in 50 mm) |
55.00% |
55.00% |
| Hardness, Brinell (converted from
Rockwell B hardness) |
123 |
123 |
| Hardness, Knoop (converted from
Rockwell B hardness) |
138 |
138 |
| Hardness, Rockwell B |
70 |
70 |
| Hardness, Vickers (converted from
Rockwell B hardness) |
129 |
129 |
Thermal Properties
The thermal properties of grade 384 stainless steel are given in the
following table.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient
(@0-100°C/32-212°F) |
17.3 µm/m°C |
9.61 µin/in°F |
| Thermal conductivity (@100°C/212°F) |
16.3 W/mK |
113 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to grade 384 stainless steel are:
- ASTM A493
- SAE 30384
- SAE J405