Stainless steel 1.4301 (X5CrNi18-10) datasheet
1.4301 is the most widely used stainless steel, the European name for AISI 304: austenitic, easy to weld and form, resistant in air and water but not to chlorides. Below are the values for flat products to EN 10088-2, with their sources.
Standards: EN 10088-2, EN 10088-1 · Sources checked on October 21, 2026
Designations
| EN name | X5CrNi18-10 |
|---|---|
| Material number | 1.4301 |
| AISI | 304 |
| UNS | S30400 |
| JIS | SUS304 |
Chemical composition
Ladle analysis in % by mass.
| Element | min. | max. |
|---|---|---|
| C | – | 0.07 |
| Si | – | 1 |
| Mn | – | 2 |
| P | – | 0.045 |
| S | – | 0.015 |
| N | – | 0.11 |
| Cr | 17.5 | 19.5 |
| Ni | 8 | 10.5 |
Values for flat products (strip and sheet). For parts that will be machined, 0.015 to 0.030 % sulphur is recommended and permitted.
Mechanical properties
Minimum values to EN 10088-2 at room temperature in the solution-annealed condition, on transverse test pieces. Sheet of 3 to 5 mm comes both cold and hot rolled; the inspection certificate states which row applies.
| Condition | Thickness (mm) | Rp0.2 (MPa) | Rp1.0 (MPa) | Rm (MPa) | A80 (%) | A (%) |
|---|---|---|---|---|---|---|
| Cold rolled strip (C) | ≤ 8 | ≥ 230 | ≥ 260 | 540–750 | ≥ 45 | ≥ 45 |
| Hot rolled strip (H) | ≤ 13.5 | ≥ 210 | ≥ 250 | 520–720 | ≥ 45 | ≥ 45 |
| Hot rolled plate (P) | ≤ 75 | ≥ 210 | ≥ 250 | 520–720 | ≥ 45 | ≥ 45 |
A80 applies to thicknesses under 3 mm, A from 3 mm. Strip narrower than 300 mm is tested lengthwise, and the minimum values are then slightly lower. The thickness is the largest the row holds for.
Physical properties
| Density | 7.9 g/cm³ (at 20 °C) |
|---|---|
| Elastic modulus | 200 GPa (at 20 °C) |
| Thermal expansion | 16 × 10⁻⁶/K (at 20–100 °C) |
| Thermal conductivity | 15 W/(m·K) (at 20 °C) |
| Specific heat capacity | 500 J/(kg·K) (at 20 °C) |
| Electrical resistivity | 0.73 Ω·mm²/m (at 20 °C) |
| Magnetic | Hardly when solution annealed, increasingly after cold forming such as bending |
Guide values to EN 10088-1, not guaranteed.
Processing
Laser cutting
Well suited to laser fusion cutting with nitrogen and to flame cutting with oxygen. The cut edges have only small heat-affected zones and are usually free of microcracks, so they form well. With suitable process control, nitrogen-cut edges can be welded without further preparation.[1]
Welding
Welds well by all common processes, such as TIG, MAG, manual metal arc and laser, without preheating. DEW recommends 1.4316 (AISI 308L) as filler with an interpass temperature of at most 200 °C. High thermal expansion and low thermal conductivity make it distort more than unalloyed steel. Pickle off the heat tint at the seam, or corrosion resistance stays lower there.[1][4][3]
Forming and bending
Forms well by all cold-forming methods, with very good stretch formability and strong work hardening. Forming makes it slightly magnetic.[3][1]
Heat treatment
Solution annealing at 1000 to 1100 °C with rapid cooling in water or air. Chromium carbides precipitate between roughly 400 and 850 °C, so time in that range should be limited. DEW gives 400 to 850 °C, Outokumpu 550 to 850 °C.[1][4][3]
Corrosion
Suitable for rural, urban and light industrial atmospheres (corrosion resistance class II to EN 1993-1-4), not for seawater or swimming pools. Chloride solutions cause stress corrosion cracking under tensile stress above about 50 °C. Resistant to intergranular corrosion as delivered but not reliably after welding, where the low-carbon 1.4307 is the better choice. PREN 17.5 to 21.1.[4][3][5]
Stainless Steel 1.4301 (X5CrNi18-10) at Dynamic Parts
We cut parts from 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, and 5 mm, up to 550 × 1150 mm, from a single piece. The material page lists prices for every thickness, and the configurator prices a part of your own straight away.
See pricesSources
- thyssenkrupp Materials Services: Werkstoffdatenblatt 1.4301, austenitischer korrosionsbeständiger Stahl, 03.2020. Accessed on October 21, 2026.
- Euro Inox: Stainless Steel: Tables of Technical Properties, 2nd edition 2007. Accessed on October 21, 2026.
- Outokumpu: Core range datasheet, stainless steels for corrosive environments. Accessed on October 21, 2026.
- Deutsche Edelstahlwerke: Acidur 4301 Werkstoffdatenblatt X5CrNi18-10, 27.11.2015. Accessed on October 21, 2026.
- The Steel Construction Institute: Design Manual for Structural Stainless Steel (SCI P413), 4th edition 2017. Accessed on October 21, 2026.
The values come from the sources named and are given for guidance. What binds is the standard in its current edition and the inspection certificate for the batch delivered. Where sources differ, the value says so.