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 304LN is a nitrogen-strengthened version of stainless steel grade 304.
The following datasheet provides an overview of grade 304LN stainless steel.
Chemical Composition
The chemical composition of grade 304LN stainless steel is outlined in the following table.
|
Element |
Content (%) |
|
Chromium, Cr |
18-20 |
|
Nickel, Ni |
8-12 |
|
Manganese, Mn |
2 max |
|
Silicon, Si |
1 max |
|
Nitrogen, N |
0.1-0.16 |
|
Phosphorous, P |
0.045 max |
|
Carbon, C |
0.03 max |
|
Sulfur, S |
0.03 max |
|
Iron, Fe |
Remainder |
Mechanical Properties
The mechanical properties of grade 304LN stainless steel are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
515 MPa |
74694 psi |
|
Yield strength |
205 MPa |
29732 psi |
|
Elongation at break (in 50 mm) |
40% |
40% |
|
Hardness, Brinell |
217 |
217 |
|
Hardness, Rockwell B |
95 |
95 |
Other Designations
Equivalent materials to grade 304LN stainless steel are given below.
|
ASTM A182 |
ASTM A213 |
ASTM A269 |
ASTM A312 |
ASTM A376 |
|
ASTM A240 |
ASTM A249 |
ASTM A276 |
ASTM A336 |
ASTM A403 |
|
ASTM A193 (B8LN, B8LNA) |
ASTM A194 (8LN, 8LNA) |
ASTM A320 (B8LN, B8LNA) |
ASTM A479 |
ASTM A666 |
ASTM A688
|
ASTM A813
|
ASTM A814
|
DIN 1.4311
|
|
Applications
Grade 304LN stainless steel is widely used in the following applications:
-
Heat exchangers
-
Chemical industry
-
Food industry
-
Petroleum industry
-
Fabrication industry
-
Nuclear industry