Feb 26 2013
Topics Covered
Introduction
Chemical Composition
Mechanical Properties
Other Designations
Applications
Introduction
Stainless steel grade 304 is the most commonly used stainless steel. Stainless steel grade 304N has better corrosion resistance than grade 302, and is mostly non-magnetic in nature; however when cold worked it acquires a slightly magnetic quality.
The following datasheet provides an overview of grade 304N stainless steel.
Chemical Composition
The chemical composition of grade 304N stainless steel is outlined in the following table.
|
Element |
Content (%) |
|
Chromium, Cr |
18-20 |
|
Nickel, Ni |
8-11 |
|
Manganese, Mn |
2 |
|
Silicon, Si |
1 |
|
Nitrogen, N |
0.1-0.16 |
|
Carbon, C |
0.08 |
|
Phosphorous, P |
0.045 |
|
Sulfur, S |
0.030 |
|
Iron, fe |
Balance |
Mechanical Properties
The mechanical properties of grade 304N stainless steel are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
620 MPa |
89900 psi |
|
Yield strength |
330 MPa |
47900 psi |
|
Elastic modulus |
193-200 GPa |
28000- 29000 ksi |
|
Hardness, Rockwell B |
85 |
85 |
Other Designations
Equivalent materials to grade 304N stainless steel are given below.
|
ASTM A182 |
ASTM A193 (B8N, B8NA) |
ASTM A194 (8N, 8NA) |
ASTM A213 |
ASTM A240 |
|
ASTM A249 |
ASTM A312 |
ASTM A358 |
ASTM A376 |
ASTM A403 |
|
ASTM A430 |
ASTM A479 |
ASTM A666 |
ASTM A688 |
ASTM A813 |
ASTM A814
|
|
|
|
|
Applications
Grade 304N stainless steel is widely used in the following applications:
-
Valves
-
Oil well filter screens
-
Cooling coils
-
Pressure vessels
-
evaporators
-
Beer barrels
-
Chemical equipment
-
Dairy equipment,
-
Flexible metal hose
-
Nuclear vessels
-
Textile dyeing equipment
-
Food processing equipment
-
Hypodermic needles