AISI 304 | 1.4301 | BS 304S31 | X5CrNi18-10 | Austenitic stainless steel
Data sheet according to DIN EN 10088-3 for material number AISI 304 / 1.4301
The austenitic chromium-nickel stainless steel AISI 304 is also known under the designations 1.4301, BS 304S31, stainless steel 304 or X5CrNi18-10. The properties of this V2A stainless steel grade include good corrosion resistance (PREN value 17.5 to 21.1) under natural influences such as water (provided it is not saline or chlorinated) or humidity. The material has a tensile strength of 500 to 700 N/mm², a hardness of ≤ 215 HB and a density of 7.9 kg/dm³ (at 20°C). Stainless steel AISI 304 is versatile and can be processed and worked in a variety of ways, e.g. by cold forming and cold heading. It is also very good for forging, rolling and welding. However, it should be noted that this stainless steel is not resistant to intergranular corrosion when welded. As an austenitic chromium-nickel steel, AISI 304 (1.4301 / BS 304S31) is non-magnetic and only very weakly magnetisable. It can be polished well (polished to a shine is possible) and can be ground and brushed.
Specifications of the material
EN-grade 1.4301
EN-short name X5CrNi18-10
EN-standard 10088-3
Microstructure austenite
Comparable standards and designations
AFNOR Z7CN18-09
AISI 304
BS 304S31
ČSN 17240
GB 0Cr18Ni9
JIS SUS304
PN 0H18N9
UNE F.3504
UNI X5CrNi18-10
UNS S30400
SFS 725
SIS / SS 2333
Properties and chemical composition of stainless steel AISI 304 / 1.4301
C | Si | Mn | P | S | N | Cr | Cu | Mo | Ni | Ti |
|---|---|---|---|---|---|---|---|---|---|---|
≤ 0,07 | ≤ 1,00 | ≤ 2,00 | ≤ 0,045 | ≤ 0,03 | ≤ 0,10 | 17,5 - 19,5 | - | - | 8,0 - 10,5 | - |
Mass fraction in % according to DIN EN 10088-3
Abbreviations: C = carbon, Cr = chromium, Cu = copper, Mn = manganese, Mo = molybdenum, N = nitrogen, Ni = nickel, P = phosphorus, S = sulphur, Si = silicon, Ti = thallium.
Physical properties
Magnetizability: low
Density (kg/dm³): 7,9
Thermal conductivity (up to 20°C): 15
Electronic resistance at room temperature (in Ω mm²/m): 0,73
Mechanical properties
The specified values refer to the diameter range ≤ 160 (Ø in mm) and 160 < d ≤ 250 (Ø in mm)*
Hardness in HB: ≤ 215
Yield strength Rp0.2 in Mpa: ≥ 190
Yield strength Rp1.0 in Mpa: ≥ 225
Strength Rm in Mpa: 500-700
Elongation at break A in % (longitudinal): 45
Notched impact J (%) (longitudinal): 100
* These data refer to mechanical properties at room temperature in the solution-annealed condition (according to EN 10088-3)
Yield strengths at elevated temperature in the solution-annealed condition
Temp in °C | 100 °C | 150 °C | 200 °C | 250 °C | 300 °C | 350 °C | 400 °C | 450 °C | 500 °C | 550 °C |
|---|---|---|---|---|---|---|---|---|---|---|
Rp1,0 in Mpa | 190 | 170 | 155 | 145 | 135 | 129 | 125 | 122 | 120 | 120 |
Rp0,2 in Mpa | 155 | 140 | 127 | 118 | 110 | 104 | 98 | 95 | 92 | 90 |
The stainless steel material 1.4301 (AISI 304 / X5CrNi18-10) can be used for all common welding processes (with the exception of gas welding). No filler material is required.
Note: When welded, the material is not resistant to intercrystalline corrosion. You can use the CEV calculator to determine the carbon equivalent of the steel.
Forgeability
Material 1.4301 has good forging properties. After slow heating to approx. 1150°C - 1180°C, the material can be forged in the range of approx. 1180 - 950 °C. Cooling after forging should take place in water or air.
Heat treatment and hot forming
Solution heat treatment (cooling by air or water): 1000-1100 °C
Hot forming (cooling by air): 1200-900 °C
Machinability
This stainless steel is generally easy to machine. However, like all austenitic materials, stainless steel AISI 304 hardens during machining. Therefore, it is important to ensure that the depth of cut is sufficient.
Corrosion resistance
Stainless steel AISI 304 essentially has good corrosion resistance to natural environmental influences such as rain. However, the material is susceptible to intergranular corrosion in the welded state. The material should not be used in swimming pools (with added chlorine) and is also unsuitable in combination with salt water (seawater). Corrosion resistance in the forged state is impaired by scale or annealing colours, so these must be removed.
Application area of stainless steel AISI 304 / 1.4301
Stainless steel AISI 304 (1.4301 / X5CrNi18-10) is regularly used in a range of industrial sectors. These include, among others, tank construction, where it is used to make tanks such as pressure vessels, storage tanks or wine tanks, as well as in the construction of household appliances and the furniture industry. The material is also used in architecture and construction, for example for façade cladding, railings and other decorative elements. This stainless steel is also regularly used in automotive manufacturing (vehicle construction), for example for body parts and exhaust systems. In mechanical engineering and apparatus construction, machine and pump parts as well as pipelines are made from this material. In sanitary engineering, it is used for fittings, sinks and washing tables, for example. Stainless steel AISI 304 (1.4301 / BS 304S31) is also regularly used in the chemical industry. Here, containers, pipes and apparatus are made from this material.
Our stock of stainless steel wire 1.4301
Please note
The information given in this data sheet has been compiled to the best of our knowledge and is based on the current version of the relevant standard. It is considered for reference only and we assume no liability for any errors.
