ASTM A240 304 stainless steel is one of the most widely used Chromium-Nickel Stainless steel. As a kind of widely used steel, ASTM A240 304 stainless steel has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; stamping, bending and other hot working properties are good, has no heat treatment hardening phenomenon (service temperature - 196 ~800℃) and good workability and weldability.
ASTM A240 304 stainless steel has good corrosion resistance in the atmosphere, widely used in manufacturing plate heat exchangers, corrugated tubes, household appliances, automotive accessories, medical appliances, building materials, chemistry, food industry, agriculture, ship components, etc.
ASTM A240 304 chemical composition
|
Grade |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
N |
|
A240 304 |
0.07 |
2.00 |
0.045 |
0.030 |
0.75 |
17.5-19.5 |
8.0-10.5 |
0.10 |
ASTM A240 304 mechanical properties
|
Grade |
Tensile strength, min Mpa |
Yield strength, min Mpa |
Elongation in 2 in % |
Hardness, max |
|
Brinell |
Rockwell B |
|
A240 304 |
515 |
205 |
40 |
201 |
92 |
The most important elements in ASTM A240 304 stainless steel are Ni and Cr, common judgment in the industry considers that ASTM A240 304 stainless steel can be considered as long as the content of Ni is more than 8% and the content of Cr is more than 18%. This is why the industry calls this type of stainless steel 18/8 stainless steel. In fact, the relevant product standards for 304 have very clear provisions, and these product standards have some differences for different shapes of stainless steel.
