DIN EN 1.4305 Stainless Steel X8CrNiS18-9 Material Equivalent, Properties, Datasheet

DIN EN 1.4305 Stainless Steel X8CrNiS18-9 Material

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.

1.4305 Material Properties

The following datasheet and specification summarize DIN EN 1.4305 properties, such as chemical composition, physical and mechanical properties, heat treatment, welding, etc.

Chemical Composition

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

Physical Properties


  • 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3;
  • 1 μΩ·m = 1 Ω·mm²/m
  • 1 GPa = 1 kN/mm2
Physical Properties
Density, g/cm3 (Kg/m3) 7.9 (7900)
Magnetic No
Specific heat capacity, J/(Kg·K) 500 (20 °C)
Electrical resistivity, μΩ·m 0,73 (20 °C)
Modulus of elasticity, GPa 210 (20 °C)
194 (100 °C)
186 (200 °C)
179 (300 °C)
172 (400 °C)
165 (500 °C)
Thermal conductivity, (W/m·K) 15,0 (20 °C)
Mean coefficient of thermal expansion, (10-6/K) 16,0 (20-100 °C)
16,5 (20-200 °C)
17,0 (20-300 °C)
17,5 (20-400 °C)
18,0 (20-500 °C)

Mechanical Properties

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

Material 1.4305 Heat Treatment

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, °C Type of cooling Temperature, °C 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.

Corrosion Resistance

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.

Use and Application

Turned parts of the food and dairy industry, photo industry, paint, oil, soap, paper and textile industry

1.4305 Stainless Steel Equivalent Material

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) equivalent material
European Union US ISO China Japan
Standard Steel Name (Material Number) Standard Grade (UNS) Standard Designation (ISO number ) Standard Grade Standard Grade
EN 10088-2;
EN 10088-3
X8CrNiS18-9 (1.4305) AISI;
ASTM A314;
ASTM A473;
ASTM A581/A581M;
ASTM A582/A582M;
ASTM A895;
303 (UNS S30300) ISO 15510 X10CrNiS18-9 (4305-303-00-I) GB/T 1220;
GB/T 3280
Y1Cr18Ni9 (Old designation)
JIS G4303; JIS G4304 SUS303

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