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AISI 304 | 1.4301 | BS 304S31 | X5CrNi18-10 | Stainless steel

Data sheet according to DIN EN 10088-3 for material number AISI 304 / 1.4301

The material AISI 304  is an austenitic chromium-nickel stainless steel, also known as 1.4301, stainless steel 304, BS 304S31 or X5CrNi18-10. The properties of this V2A stainless steel grade include good corrosion resistance (PREN value 17.5 to 21.1) in natural influences such as water (provided it does not contain salt or chlorine) or humidity. The material is versatile and can be machined and processed in a variety of ways. The material is suitable for cold forming and cold heading. The material is also very suitable for forging, rolling and welding. Please note, however, that this stainless steel is not resistant to intergranular corrosion when welded. As an autenitic chromium-nickel steel, AISI 304 (1.4301 / X5CrNi18-10) is non-magnetic and only very slightly magnetisable. The material has a tensile strength of 500-700 N/mm² and has medium machinability. It has good polishability (bright polishing is possible) and can be ground and brushed.

1.4301, AISI 304, BS 304S31, X5CrNi18-10 corrosion-resistant stainless steel data sheet suitable for welding and forging

Specifications of the material

EN-grade 1.4301
EN-short name X5CrNi18-10
EN-standard 10088-3
Microstructure austenite

Comparable standards and designations


AISI 304

BS 304S31

ČSN 17240

GB 0Cr18Ni9


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

≤ 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

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
Rp0,2 in Mpa
Rp1,0 in Mpa


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.


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.


Machinability is given. However, like all austenitic materials, stainless steel 1.4301 hardens during machining. Care should therefore be taken to ensure a correspondingly high cutting depth.

Corrosion resistance

Stainless steel 1.4301 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.

Heat treatment and hot forming

Solution heat treatment (cooling by air or water): 1000-1100 °C

Hot forming (cooling by air): 1200-900 °C

Application area of stainless steel AISI 304 / 1.4301

The stainless steel material 1.4301 (AISI 304 / X5CrNi18-10) is regularly used in various industrial sectors. These include container construction, the construction of household appliances and the furniture industry. The material is also used in architecture and the construction industry. Stainless steel 1.4301 (AISI 304 / X5CrNi18-10) is also regularly used in automotive manufacturing (vehicle construction), apparatus engineering, sanitary engineering (sanitary facilities) and the chemical industry.

Our stock of stainless steel wire 1.4301

Stainless steel wire 1.4301 (AISI 304 / X5CrNi18-10) is one of the most important materials in our delivery programme. We regularly have this material in stock in various dimensions. You can find an overview of the corresponding diameters via the link below.

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.

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