AISI / ASTM / UNS /SUS 304, Euronorm 1.4301, Nom. X5CrNi18-10 stainless steel has a minimum of 18% chromium and 8% nickel, combined with a maximum of 0.08% carbon. It is defined as a Chromium-Nickel austenitic alloy.
Grade 304/304L is the most widely used commercial grade of stainless steel supplied into numerous industry sectors. It has excellent corrosion resistance in ordinary atmospheric conditions, it is easily machined and is also easy to weld. Whilst performing well when exposed to relatively high temperatures, this grade of stainless steel like most austenitic stainless grades, also maintains its strength and toughness at sub-zero temperatures, making this an excellent choice for various applications and industries such as food & drink processing, petrochemical and construction.
Applications
Pipelines, Heat Exchangers, Pressure Vessels, Flanges and fittings, Valves, Processing Equipment, General Construction
| 304L | Cr% | Ni% | C% | Si% | Mn% | P% | S% | Cu% | Fe% |
| MIN | 17.5 | 8.0 | – | – | – | – | – | – | – |
| MAX | 19.5 | 10.5 | 0.03* | 1.0 | 2.0 | 0.05 | 0.02 | 0.5 | Bal |
*0.08 max carbon content (C%) for 304 (1.4301)
Mechanical Properties
Properties quoted below are guideline figures only and should not be used for any design purposes.
| – | 0.2% Proof (Nmm²) | UTS (Nmm²) | Elongation (%) |
| 304 (1.4301) | 235 | 530 – 730 | 40 |
| 304L (1.4307) | 200 | 500 – 700 | 40 |
Related Specs & Trade Names
1.4301, 1.4307, 304/304L, Grade 304, Grade 304L, Alloy 304, Alloy 304L, AISI 304L, TYPE 304, UNS S30400, UNS S30403, UNS S30409, X2CrNi18-9, ASTM A240, ASME SA240, 304 Stainless, 304, 304L, 304H,
