EN 1.4571 Material (X6CrNiMoTi17-12-2 Stainless Steel)
DIN EN 1.4571 material (X6CrNiMoTi17-12-2) is made by adding titanium (Ti) to EN 1.4401 stainless steel (X5CrNiMo17-12-2) to improve the resistance to intergranular corrosion. Titanium can improve the corrosion resistance of stainless steel, especially intergranular corrosion, effectively prevent the sensitization of stainless steel, and also improve the stability of steel in high temperature and high pressure. When the mass fraction of titanium is between 0.03% and 0.1%, the yield strength of the steel is improved. Therefore, EN 1.4571 material has higher temperature resistance, corrosion resistance and sensitization resistance than 1.4401.
EN 1.4571 is more resistant to corrosion than EN 1.4301 (X5CrNi18-10) and 1.4401 (X5CrNiMo17-12-2). Because it contains titanium and forms TiC with carbon, it greatly reduces the risk of intergranular corrosion sensitization. However, in high temperature, high concentration of concentrated nitric acid, chloride and hot alkaline solution, significant corrosion may occur.
EN 1.4571 steel has good weldability, does not require preheating before welding, and usually does not require heat treatment after welding.
- Hot forming temperature: 1200-900℃ (cooling: air)
- Solution annealing temperature: 1020-1120℃ (cooling: air, water)
Below is material 1.4571 datasheet including chemical composition, density, thermal expansion coefficient, thermal conductivity, yield strength, hardness, etc.
The typical chemical composition of 1.4571 is given in the table below.
|Chemical Composition %|
|Country (Regions)||Standard||Steel Name (Material Number)||C ≤||Si ≤||Mn ≤||P ≤||S ≤||Cr||Ni||Mo||Ti|
|European Union||EN 10088-3||X6CrNiMoTi17-12-2 (1.4571)||0.08||1.00||2.00||0.045||0.015||16.5-18.5||10.5-13.0||2.00-2.50||5xC-0.70|
- Density: 8.0 g/cm3
- Electrical resistance: 0.75 (Ω.mm2/m) at 20 °C
- Specific heat capacity: 500 (J/kg.K) at 20 °C
- Thermal conductivity: 15 (W/m.K) at 20 °C
- Modulus of elasticity (GPa):
- 200 (at 20 °C)
- 194 (at 100 °C)
- 186 (at 200 °C)
- 179 (at 300 °C)
- 172 (at 400 °C)
- 165 (at 500 °C)
- Thermal expansion (10-6.K-1):
- 16.5 (20 – 100 °C)
- 17.5 (20 – 200 °C)
- 18.0 (20 – 300 °C)
- 18.5 (20 – 400 °C)
- 19.0 (20 – 500 °C)
Notes: 10-6.K-1 = 10-6/K = (µm/m)/°C
|Mechanical properties (solution annealed)|
|Country (Regions)||Standard||Steel Grade (Steel Number)||Diameter (d) or Thickness (t) in mm||Hardness (HB)||0.2% proof strength (N/mm2)||1% proof strength (N/mm2)||Tensile strength (N/mm2)||Elongation (%)||Impact energy (J)|
|European Union||EN 10088-3||X6CrNiMoTi17-12-2 (1.4571)||d≤160||≤ 215||≥ 200||≥ 235||500-700||≥ 40||≥ 100|
|160<t≤250||≥ 30||≥ 60|
|Mechanical properties for bright bars (solution annealed)|
|Country (Regions)||Standard||Steel Grade (Steel Number)||Diameter (d) or Thickness (t) in mm||0.2% proof strength (N/mm2) ≥||Tensile strength (N/mm2)||Elongation (%) ≥||Impact energy (J) ≥|
|European Union||EN 10088-3||X6CrNiMoTi17-12-2 (1.4571)||d≤10||400||600-950||25||–|
Stainless steel 1.4571 equivalent to US ASTM AISI, ISO, Japanese JIS and Chinese GB standard.
|EN 1.4571 (X6CrNiMoTi17-12-2) material equivalent|
|Standard||Steel Name (Material Number)||Standard||Grade (UNS)||Standard||ISO Name (ISO Number)||Standard||Grade||Standard||Grade|
|316Ti (S31635)||ISO 15510||X6CrNiMoTi17-12-2 (4571-316-35-I)||GB/T 20878;|
0Cr18Ni12Mo3Ti (Old designation)
Screening in marine environment, nuclear power equipment, pulp and paper equipment, marine equipment, food processing equipment, heat exchangers, propeller shafts and fittings, pipe and flange, tableware and cookware, etc.