Sep 26 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications
Introduction
Stainless steels are high-alloy steels with good corrosion
resistance due to the presence of large amounts of chromium in these
steels. Most of the stainless steels contain about 10% of chromium.
Stainless steels are available in three different groups based on
their crystalline structure. These groups include martensitic,
austenitic and ferritic. The combination of martensitic and ferritic
steels forms a fourth group of stainless steels known as
precipitation-hardened steels.
The following datasheet provides an overview of grade 403 stainless
steel.
Chemical Composition
The chemical composition of grade 403 stainless steel is outlined in
the following table.
| Element |
Content
(%) |
| Iron, Fe |
86 |
| Chromium, Cr |
12.3 |
| Manganese, Mn |
1.0 |
| Silicon, Si |
0.50 |
| Carbon, C |
0.15 |
| Phosphorous, P |
0.040 |
| Sulfur, S |
0.030 |
| Carbon, C |
0.15 |
Physical Properties
The following table shows the physical properties of grade 403
stainless steel.
| Properties |
Metric |
Imperial |
| Density |
7.80 g/cm3 |
0.282 lb/in³ |
Mechanical Properties
The mechanical properties of grade 403 annealed stainless steel are
displayed in the following table.
| Properties |
Metric |
Imperial |
| Tensile strength |
485 MPa |
70300 psi |
| Yield strength (@strain 0.200 %) |
310 MPa |
45000 psi |
| Fatigue Strength (annealed,
@diameter 25mm/0.984 in) |
275 MPa |
39900 psi |
| Shear modulus (typical for steel) |
76.0 GPa |
11000 ksi |
| Elastic modulus |
190-210 GPa |
27557-30458 ksi |
| Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
| Elongation at break (in 50 mm) |
25.00% |
25.00% |
| Izod impact (tempered) |
102 J |
75.2 ft-lb |
| Hardness, Brinell (converted from
Rockwell B hardness) |
139 |
139 |
| Hardness, Knoop (converted from
Rockwell B hardness) |
155 |
155 |
| Hardness, Rockwell B |
80 |
80 |
| Hardness, Vickers (converted from
Rockwell B hardness) |
153 |
153 |
Thermal Properties
The thermal properties of grade 403 stainless steel are given in the
following table.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient
(@0-100°C/32-212°F) |
9.90 µm/m°C |
5.50 µin/in°F |
| Thermal conductivity (@500°C/932°F) |
21.5 W/mK |
149 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to grade 403 stainless steel are given in the
table below.
| AISI 403 |
AISI 614 |
ASTM A176 |
ASTM A276 |
ASTM A473 |
| ASTM A314 |
ASTM A479 |
ASTM A511 |
ASTM A580 |
DIN 1.4000 |
| QQ S763 |
AMS 5611 |
AMS 5612 |
FED QQ-S-763 |
MIL SPEC MIL-S-862 |
| SAE 51403 |
SAE J405 (51403) |
Applications
Grade 403 stainless steel is used in turbine parts and compressor
blades.