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

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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.

Data Sheet and Specifications

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

Chemical Composition

The following table lists 1.4305 stainless steel chemical composition based on cast analysis.

Chemical Composition, %
StandardSteel Grade (Steel Number)C, ≤Si, ≤Mn, ≤P, ≤SCrNiN, ≤Cu, ≤
EN 10088-2;
EN 10088-3
X8CrNiS18-9 (1.4305)0,101,002,000,0450,15-0,3517,0-19,08,0-10,00,101,00

Physical Properties

Notes:

  • 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)
MagneticNo
Specific heat capacity, J/(Kg·K)500 (20 ℃)
Electrical resistivity, μΩ·m0,73 (20 ℃)
Modulus of elasticity, GPa210 (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 ℃)

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)StandardSteel Grade (Steel Number)Diameter (d) or Thickness (t) in mmHardness (HB), ≤0.2% yield strength (MPa), ≥1% proof strength (MPa), ≥Tensile strength (MPa)Elongation, % (Longitudinal)Resistance to intergranular corrosion
European UnionEN 10088-3X8CrNiS18-9 (1.4305)≤160230190225500-75035No
Mechanical properties (Solution annealed)
Country (Region)StandardSteel Grade (Steel Number)Product ConditionThickness (mm), ≤0,2 % yield strength (Mpa), ≥, (Transverse)1 % yield strength (Mpa), ≥ (Transverse)Tensile strength (MPa)Elongation (%), ≥, (Transverse)Resistance to intergranular corrosion
European UnionEN 10088-2X8CrNiS18-9 (1.4305)hot rolled plate75190230500-70035No

Material 1.4305 Heat Treatment

The following is material 1.4305 stainless steel heat treatment, such as hot forming, solution annealing.

Hot formingSolution annealing
StandardDesignation (Steel number)Temperature, ℃Type of coolingTemperature, ℃Type of cooling
DIN EN 10088-2X8CrNiS18-9 (1.4305)1150 to 850air1000 to 1100water, air
DIN EN 10088-31200 to 9001000 to 1100

Harden

1.4305 stainless steel can’t be hardened.

Machinability

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.

Welding

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 & Application

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

1.4305 Stainless Steel Equivalent

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 UnionUSISOChinaJapan
StandardSteel Name (Material Number)StandardGrade (UNS)StandardGrade (ISO number )StandardGradeStandardGrade
EN 10088-2;
EN 10088-3
X8CrNiS18-9 (1.4305)AISI;
ASTM A240/A240M;
ASTM A276/A276M;
ASTM A959
303 (UNS S30300)ISO 15510X10CrNiS18-9 (4305-303-00-I)GB/T 1220;
GB/T 3280
Y12Cr18Ni9;
Y1Cr18Ni9 (Old designation)
JIS G4303; JIS G4304SUS303

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