ASTM A240 304H stainless steel is one of the most widely used Chromium-Nickel Stainless steel. As a kind of widely used steel, ASTM A240 304H 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 304H 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 304H chemical composition
|
Grade |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
|
A240 304H |
0.04-0.10 |
2.00 |
0.045 |
0.030 |
0.75 |
18.0-20.0 |
8.0-10.5 |
ASTM A240 304H mechanical properties
|
Grade |
Tensile strength, min Mpa |
Yield strength, min Mpa |
Elongation in 2 in % |
Hardness, max |
|
Brinell |
Rockwell B |
|
A240 304H |
515 |
205 |
40 |
201 |
92 |
The most important elements in ASTM A240 304H stainless steel are Ni and Cr, common judgment in the industry considers that ASTM A240 304H 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 304H have very clear provisions, and these product standards have some differences for different shapes of stainless steel.
