AISI 304L | 1.4307 | BS 304S11 | X2CrNi18-9 | Austenitic stainless steel
Data sheet according to DIN EN 10088-3 for material number AISI 304L / 1.4307
AISI 304L is an austenitic stainless steel that is also known under the designations 1.4307 and X2CrNi18-9. This V2A steel is comparable to AISI (1.4301), but differs from it in that it has a lower carbon content. The stainless steel 1.4307 has good corrosion resistance (PREN value 17.5 to 21.1) and is also resistant to intergranular corrosion in the welded state. It is not resistant to seawater or media containing salt or chlorine. Stainless steel 1.4307 has medium mechanical properties, 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). The material is suitable for use at low temperatures and can be used at temperatures of up to 550°C. The material has very good welding properties and can also be used for forging. Stainless steel AISI 304L (1.4307 / X2CrNi18-9) is non-magnetic and only slightly magnetisable (μr ≤ 1.3). It is easy to polish and has medium machinability. The material is suitable for machining and cold forming (cold massive forming and cold stamping).
Specifications of the material
EN-grade 1.4307
EN-short name X2CrNi18-9
EN-standard 10088-3
Microstructure Austenite
Comparable standards and designations
AFNOR Z3CN19-09
AISI 304L
Alloy 304L
AMS 5511
BS 304S11
JIS SUS304L
UNS S30403
RVS 304L
SAE 304L
SS 2352
Properties and chemical composition of stainless steel AISI 304L / 1.4307
C | Si | Mn | P | S | N | Cr | Cu | Mo | Ti | Ni |
|---|---|---|---|---|---|---|---|---|---|---|
≤ 0,03 | ≤ 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: Little
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 values given 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: ≥ 175
Yield strength Rp1.0 in Mpa: ≥ 210
Strength / tensile strength Rm in Mpa: 500-700
Elongation at break A in % (longitudinal) at ≤ 160: 45
* These figures refer to mechanical properties at room temperature in the solution-annealed state (according to EN 10088-3)
Yield strengths at elevated temperature in the solution-annealed condition
Temp in °C | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 |
|---|---|---|---|---|---|---|---|---|---|---|
Rp1,0 in Mpa | 180 | 160 | 145 | 135 | 127 | 121 | 116 | 112 | 109 | 108 |
Rp0,2 in Mpa | 145 | 130 | 118 | 108 | 100 | 94 | 89 | 85 | 81 | 80 |
Stainless steel AISI 304L (1.4307 / X2CrNi18-9) has excellent weldability. The material can be processed using most common welding methods such as arc welding or TIG welding. However, this stainless steel grade is only suitable to a limited extent for gas fusion welding and submerged arc welding. A welding filler material is not required, but the material AISI 308L (1.4316) can be used as a filler. Resistance to intergranular corrosion is not affected by welding.
Forging
Stainless steel AISI 304L (1.4307 / X2CrNi18-9) has good forging properties and is suitable for open-die and drop forging. The material must first be heated to a temperature of 1150°C to 1180°C. Forging can then be carried out in the temperature range between 950°C and 1180°C. The material must then be rapidly cooled in air or water.
Heat treatment and hot forming
Solution heat treatment (cooling by air or water): 1000-1100 °C
Hot forming (cooling by air): 1200-900 °C
Cold forming
AISI 304L can be used for cold forming and also for cold massive forming (according to DIN 10263-5). Cold heading is also possible with this material.
Corrosion resistance
Stainless steel AISI 304L (1.4307 / X2CrNi18-9) is highly resistant to corrosion in natural media (PREN value 17.5 to 21.1). Due to its low carbon content, no chromium carbides develop in this material and therefore no chromium-depleted zones are formed. AISI 304L stainless steel is resistant to intergranular corrosion and to non-saline water and steam. Furthermore, the material is resistant to formic acid (concentration up to 10%), sulphuric acid (concentration up to 1%) and nitric acid (concentration up to 7%) at room temperature. It is not resistant to media containing chlorine, such as those found in swimming pools or in connection with seawater or salt. This can lead to pitting corrosion.
Applications of stainless steel AISI 304L / 1.4307
Stainless steel AISI 304L (1.4307 / X2CrNi18-9) is used in a range of applications due to its good corrosion resistance and excellent welding properties. Industries that regularly use this steel include the automotive, chemical and petrochemical industries, as well as the construction industry. The material is also frequently used in mechanical engineering, apparatus and tank construction, and in the food industry. This austenitic V2A steel is also popular in aerospace technology, in the construction of fittings, and for decorative purposes.
Stock of stainless steel wire
The data provided in this data sheet or material information sheet has been compiled to the best of our knowledge and is based on the current version of the relevant standard. We do not accept any liability for any errors.
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