Feb 26 2013
Topics Covered
Introduction
Chemical Composition
Mechanical Properties
Other Designations
Applications
Introduction
Grade 302B is a standard specification for chromium and chromium-nickel stainless steel sheet, plate, and strip used mainly for pressure vessels and also for some general applications. It has the same corrosion resistance as grade 304 and a slightly higher strength due to the additional carbon content.
The following datasheet provides an overview of grade 302B stainless steel.
Chemical Composition
The chemical composition of grade 302B stainless steel is outlined in the following table.
|
Element |
Content (%) |
|
Iron, fe |
Balance |
|
Chromium, Cr |
17-19 |
|
Nickel, Ni |
8-10 |
|
Silicon, Si |
2-3 |
|
Manganese, Mn |
2 |
|
Carbon, C |
0.15 |
|
Nitrogen, N |
0.1 |
|
Phosphorous, P |
0.045 |
|
Sulfur, S |
0.03 |
Mechanical Properties
The mechanical properties of grade 302B (annealed sheet) stainless steel are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
655 MPa |
95000 psi |
|
Yield strength (@strain 0.200%) |
275 MPa |
39900 psi |
|
Elastic modulus |
195 GPa |
28300 ksi |
|
Izod impact (when annealed) |
108 J |
79.7 ft-lb |
|
Elongation at break (in 50 mm) |
55% |
55% |
|
Hardness, Brinell (converted from Rockwell B hardness) |
147 |
147 |
|
Hardness, Knoop (converted from Rockwell B hardness) |
164 |
164 |
|
Hardness, Rockwell B |
85 |
85 |
|
Hardness, Vickers (converted from Rockwell B hardness) |
169 |
169 |
Other Designations
Equivalent materials to grade 302B stainless steel are given below:
-
ASTM A167
-
ASTM A276
-
ASTM A473
Applications
The following are the applications of grade 302B stainless steel:
-
Home appliances
-
Automobile trim
-
Hospital equipment
-
Car and radar antennas
-
Bottling machinery
-
Dairy processing equipment
-
Spring clips, washers and retainers