Sep 26 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
Stainless steels are known as high-alloy steels. They contain about
4-30% of chromium. They are further divided into martensitic,
austenitic, and ferritic steels. Another group of stainless steels are
known as precipitation-hardened steels. They are a combination of
austenitic and martensitic steels.
Grade 301 1/2 hard stainless steel has high strength. The following
datasheet gives an overview of grade 301 1/2 hard stainless steel.
Chemical Composition
The following table shows the chemical composition of grade 301 1/2
hard stainless steel.
| Element |
Content
(%) |
| Iron, Fe |
73 |
| Chromium, Cr |
16.0-18.0 |
| Nickel, Ni |
6.0-8.0 |
| Manganese, Mn |
2.0 |
| Silicon, Si |
0.75 |
| Carbon, C |
0.15 |
| Nitrogen, N |
0.10 |
| Phosphorous, P |
0.045 |
| Sulfur, S |
0.030 |
Physical Properties
The physical properties of grade 301 1/2 hard stainless steel are
displayed in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.03 g/cm3 |
0.290 lb/in³ |
Mechanical Properties
The following table outlines the mechanical properties of grade 301
1/2 hard stainless steel.
| Properties |
Metric |
Imperial |
| Tensile strength |
1034 MPa |
150000 psi |
| Yield strength (@ strain 0.200%) |
758 MPa |
110000 psi |
| Compressive yield strength
(longitudinal) |
621 MPa |
90100 psi |
| Compressive yield strength
(transverse) |
979 MPa |
142000 psi |
| Fatigue strength |
379 MPa |
55000 psi |
| Charpy impact |
150 J |
111 ft-lb |
| Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
| Elongation at break (in 2" (50 mm)) |
18% |
18% |
| Hardness, Brinell |
297 |
297 |
| Hardness, Rockwell C (converted
from Brinell hardness) |
32 |
32 |
Thermal Properties
The thermal properties of grade 301 1/2 hard stainless steel are
displayed in following table.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@
20-100°C/68-212°F) |
16.6 µm/m°C |
9.22 µin/in°F |
| Thermal conductivity (@ 100°C/212°F) |
16.3 W/mK |
113 BTU in/hr.ft².°F |
Other Designations
Other designations equivalent to grade 301 1/2 hard stainless steel
include AMS 5518.
Applications
Grade 301 1/2 hard stainless steel is used in the following
applications:
- Wheel cover
- Kitchen equipment
- Hose clamps
- Roof draining systems
- Conveyor belts
- Truck and trailer bodies
- Springs
- Automobile molding and trim
- Railway and subway cars