DIN EN 1.4571 Material, X6CrNiMoTi17-12-2 Stainless Steel

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DIN EN 1.4571 Material X6CrNiMoTi17-12-2 Stainless Steel

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.

Corrosion Resistance

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.

Welding

EN 1.4571 steel has good weldability, does not require preheating before welding, and usually does not require heat treatment after welding.

Heat Treatment

  • Hot forming temperature: 1200-900℃ (cooling: air)
  • Solution annealing temperature: 1020-1120℃ (cooling: air, water)

Datasheet

Below is material 1.4571 datasheet including chemical composition, density, thermal expansion coefficient, thermal conductivity, yield strength, hardness, etc.

Chemical Composition

The typical chemical composition of 1.4571 is given in the table below.

Chemical Composition %
Country (Regions)StandardSteel Name (Material Number)C ≤Si ≤Mn ≤P ≤S ≤CrNiMoTi
European UnionEN 10088-3X6CrNiMoTi17-12-2 (1.4571)0.081.002.000.0450.01516.5-18.510.5-13.02.00-2.505xC-0.70

Physical Properties

  • 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

Mechanical properties (solution annealed)
Country (Regions)StandardSteel Grade (Steel Number)Diameter (d) or Thickness (t) in mmHardness (HB)0.2% proof strength (N/mm2)1% proof strength (N/mm2)Tensile strength (N/mm2)Elongation (%)Impact energy (J)
European UnionEN 10088-3X6CrNiMoTi17-12-2 (1.4571)d≤160≤ 215≥ 200≥ 235500-700≥ 40≥ 100
160<t≤250≥ 30≥ 60
Mechanical properties for bright bars (solution annealed)
Country (Regions)StandardSteel Grade (Steel Number)Diameter (d) or Thickness (t) in mm0.2% proof strength (N/mm2) ≥Tensile strength (N/mm2)Elongation (%) ≥Impact energy (J) ≥
European UnionEN 10088-3X6CrNiMoTi17-12-2 (1.4571)d≤10400600-95025
10<t≤16380580-95025
16<t≤40200500-85030100
40<t≤63200500-85030100
63<t≤160200500-70040100
160<t≤250200500-7003560

Equivalent

Stainless steel 1.4571 equivalent to US ASTM AISI, ISO, Japanese JIS and Chinese GB standard.

EN 1.4571 (X6CrNiMoTi17-12-2) material equivalent
European UnionUSAISOChinaJapan
StandardSteel Name (Material Number)StandardGrade (UNS)StandardISO Name (ISO Number)StandardGradeStandardGrade
EN 10088-3;
EN 10088-1
X6CrNiMoTi17-12-2 (1.4571)AISI;
ASTM A240/A240M;
A276/A276M
316Ti (S31635)ISO 15510X6CrNiMoTi17-12-2 (4571-316-35-I)GB/T 20878;
GB/T 1220;
GB/T 3280
06Cr17Ni12Mo2Ti;
0Cr18Ni12Mo3Ti (Old designation)
JIS G4304SUS316Ti

Applications

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.

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