What is equivalent to ASTM A240?
ASTM A240 is a standard specification for chromium and chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications. It defines chemical composition, mechanical properties, and manufacturing requirements for flat-rolled stainless steels like 304, 304L, 316, 316L, and others.
What Is Equivalent to ASTM A240?
The equivalent material to ASTM A240 depends on the grade of stainless steel being referenced. Below is a table listing common ASTM A240 grades and their international equivalents:
| ASTM A240 Grade | UNS No. | EN/DIN Equivalent | JIS Equivalent | Common Name |
|---|---|---|---|---|
| 304 | S30400 | EN 1.4301 / X5CrNi18-10 | SUS 304 | 18/8 stainless steel |
| 304L | S30403 | EN 1.4307 / X2CrNi18-9 | SUS 304L | Low-carbon 304 |
| 316 | S31600 | EN 1.4401 / X5CrNiMo17-12-2 | SUS 316 | Mo-enhanced 304 |
| 316L | S31603 | EN 1.4404 / X2CrNiMo17-12-2 | SUS 316L | Low-carbon 316 |
| 321 | S32100 | EN 1.4541 / X6CrNiTi18-10 | SUS 321 | Ti-stabilized 304 |
| 904L | N08904 | EN 1.4539 / X1NiCrMoCu25-20-5 | SUS 890L | High corrosion resistance |
What is the chemical composition of ASTM A240?
What Is ASTM A240 Used For?
Pressure vessels and boilers
Chemical and food processing equipment
Architectural applications
Pharmaceutical processing equipment
Marine and coastal environments (especially 316/316L)
What is the difference between A240 and A182?
ASTM A240 is stainless steel plate that offers strength at high temperatures, and high corrosion resistance. While ASTM A182 and ASTM A240 have similar chemical properties, the production method differs: A240 is plate; A182 is forged, which may affect materials choice.
What is the thickness tolerance of ASTM A240 A480?
ASTM A240 has stricter tolerances than ASTM A480. For instance, the thickness tolerance for ASTM A240 Type 304L Plate is ±0.024″, whereas the tolerance for ASTM A480 Type 304L Plate is ±0.030″. This indicates that the former can be up to 0.006″ thinner.
Is ASTM A240 only for stainless steel?
Yes, ASTM A240 applies specifically to austenitic and ferritic stainless steels, not carbon steel or alloy steel.
Can ASTM A240 material be used for pressure vessels?
Yes, many ASTM A240 grades (like 304L, 316L) are qualified for pressure vessel applications, especially in corrosive environments.
What's the difference between ASTM A240 and AISI 304?
ASTM A240 is a product standard; AISI 304 is a material grade. ASTM A240 specifies how AISI 304 should be produced and tested in plate or sheet form.
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