DIN EN 1.4305 stainless steel (X8CrNiS18-9 material) is an European standard austenitic corrosion resisting material with sulfur added to improve cutting performance, but its corrosion resistance is limited in acid and chloride media, when used in these media, pitting or cavity corrosion can occur. X8CrNiS18-9 steel forms short chips during cutting and is therefore particularly suitable for machining. Due to material properties, this stainless steel is also known as free-cutting steel.
Compared to 1.4301 material, DIN 1.4305 V2A has a higher sulfur content and contains 1.0% copper.
The following table summarizes DIN EN 1.4305 datasheet and specifications, such as chemical composition, physical properties, mechanical properties, heat treatment, welding, etc.
The following table lists 1.4305 stainless steel chemical composition based on cast analysis.
| Chemical Composition, % | ||||||||||
| Standard | Steel Grade (Steel Number) | C, ≤ | Si, ≤ | Mn, ≤ | P, ≤ | S | Cr | Ni | N, ≤ | Cu, ≤ |
|
EN 10088-2; EN 10088-3 |
X8CrNiS18-9 (1.4305) | 0,10 | 1,00 | 2,00 | 0,045 | 0,15-0,35 | 17,0-19,0 | 8,0-10,0 | 0,10 | 1,00 |
Notes:
| Physical Properties | |
| Density, g/cm3 (Kg/m3) | 7.9 (7900) |
| Magnetic | No |
| Specific heat capacity, J/(Kg·K) | 500 (20 ℃) |
| Electrical resistivity, μΩ·m | 0,73 (20 ℃) |
| Modulus of elasticity, GPa | 210 (20 ℃) |
| 194 (100 ℃) | |
| 186 (200 ℃) | |
| 179 (300 ℃) | |
| 172 (400 ℃) | |
| 165 (500 ℃) | |
| Thermal conductivity, (W/m·K) | 15,0 (20 ℃) |
| Mean coefficient of thermal expansion, (10-6/K) | 16,0 (20-100 ℃) |
| 16,5 (20-200 ℃) | |
| 17,0 (20-300 ℃) | |
| 17,5 (20-400 ℃) | |
| 18,0 (20-500 ℃) | |
Material 1.4305 stainless steel mechanical properties at room temperature in the solution-annealed condition and resistance to intergranular corrosion.
| Mechanical properties (Solution annealed) | |||||||||
| Country (Region) | Standard | Steel Grade (Steel Number) | Diameter (d) or Thickness (t) in mm | Hardness (HB), ≤ | 0.2% yield strength (MPa), ≥ | 1% proof strength (MPa), ≥ | Tensile strength (MPa) | Elongation, % (Longitudinal) | Resistance to intergranular corrosion |
| European Union | EN 10088-3 | X8CrNiS18-9 (1.4305) | ≤160 | 230 | 190 | 225 | 500-750 | 35 | No |
| Mechanical properties (Solution annealed) | |||||||||
| Country (Region) | Standard | Steel Grade (Steel Number) | Product Condition | Thickness (mm), ≤ | 0,2 % yield strength (Mpa), ≥, (Transverse) | 1 % yield strength (Mpa), ≥ (Transverse) | Tensile strength (MPa) | Elongation (%), ≥, (Transverse) | Resistance to intergranular corrosion |
| European Union | EN 10088-2 | X8CrNiS18-9 (1.4305) | hot rolled plate | 75 | 190 | 230 | 500-700 | 35 | No |
The following is material 1.4305 stainless steel heat treatment, such as hot forming, solution annealing.
| Hot forming | Solution annealing | ||||
| Standard | Designation (Steel number) | Temperature, ℃ | Type of cooling | Temperature, ℃ | Type of cooling |
| DIN EN 10088-2 | X8CrNiS18-9 (1.4305) | 1150 to 850 | air | 1000 to 1100 | water, air |
| DIN EN 10088-3 | 1200 to 900 | 1000 to 1100 | |||
1.4305 stainless steel can’t be hardened.
The addition of sulfur will cause chip breaking during the cutting process, making 1.4305 material particularly suitable for machining. However, sufficient cooling must be ensured during processing to avoid overheating.
Since 1.4305 stainless steel contains 0,15-0,35% sulfur, it has poor weldability and can cause thermal cracking during welding, but friction welding is an exception. If welding cannot be avoided, electrodes of 1.4462 or 1.4370 are recommended.
Due to the addition of sulfur, 1.4305 stainless steel is not resistant to intergranular corrosion. When used in acid and chloride media, pitting or cavity corrosion will occur.
Turned parts of the food and dairy industry, photo industry, paint, oil, soap, paper and textile industry
Material X8CrNiS18-9, DIN 1.4305 stainless steel equivalent to US ASTM AISI SAE, ISO, European (German DIN, British BSI, France NF), Japanese JIS and Chinese GB standard (for reference).
| EN X8CrNiS18-9 (1.4305) material equivalent | |||||||||
| European Union | US | ISO | China | Japan | |||||
| Standard | Steel Name (Material Number) | Standard | Grade (UNS) | Standard | Grade (ISO number ) | Standard | Grade | Standard | Grade |
|
EN 10088-2; EN 10088-3 |
X8CrNiS18-9 (1.4305) |
AISI; ASTM A240/A240M; ASTM A276/A276M; ASTM A959 |
303 (UNS S30300) | ISO 15510 | X10CrNiS18-9 (4305-303-00-I) |
GB/T 1220; GB/T 3280 |
Y12Cr18Ni9; Y1Cr18Ni9 (Old designation) |
JIS G4303; JIS G4304 | SUS303 |