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EN 10216‑5 Grade X2NiCrAlTi32‑20 – Solution Annealed + AT: Premium Stainless Steel for High‑Pressure Steam Generators

Steel X2NiCrAlTi32-20, material number 1.4558 is applicated acc. to VdT_V-material specification 474 : 1984-12 for heat exchanger pipes for use as U-pipes in steam generators for pressurized water reactors (grit size-index acc. to EN 103 at least 7 at the straight pipe) for temperatures from -10 to 400 deg. as per KTA 3201.1 and other examined specifications as well as for pressure vessels acc. to TRB 100 and AD-data sheet W 2 at operating temperatures from -10 to 400 deg. The material can be welded in pipe plates using TIG-automatic welding, TIG-hand welding and metal arc welding. It is cold formable for bending radii of at least 4,5 x outside diameter. Heat treatment is not allowed. The material shows owing to its high Ni-content a very high resistance to stress corrosion. The material is highly resistant against stress corrosion because of the high amount of Ni.Furthermore it is very high resistant in nitric acid and organic acids as well as in aqueous media also at high temperatures. Pitting and crevice corrosion sensitiveness are not high but they are significantly higher than at 1.4539. The material is resistant to intercrystalline corrosion both in delivery and welded condition (at tubes for wall thicknesses up to max. 6 mm). Its limit temperature amounts to 400 deg. (operating time up to 100000 h, no intercrystalline corrosion). 1.4558 is only limited applicable in sulphuric and hydrochlorid acid. The steel is standard material for steam generators and feed water heater in power stations.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.94 - 8 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

201 GPa

20.0 °C

194 - 200 GPa

100.0 °C

189 - 195 GPa

200.0 °C

183 - 188 GPa

300.0 °C

177 - 182 GPa

400.0 °C

170 - 175 GPa

500.0 °C

163 - 168 GPa

600.0 °C

156 GPa

700.0 °C

149 GPa

800.0 °C

141 GPa

900.0 °C

134 GPa

1000.0 °C

127 GPa

Elongation

20.0 °C

35 %

Elongation, transverse

20.0 °C

30 %

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Austenitic Stainless Steel

Shear modulus

23.0 °C

77 GPa

Typical for Austenitic Stainless Steel

Tensile strength

20.0 °C

450 - 700 MPa

Tensile strength, transverse

20.0 °C

450 - 700 MPa

Yield strength Rp0.2

20.0 °C

180 MPa

50.0 °C

168 MPa

100.0 °C

155 MPa

150.0 °C

145 MPa

200.0 °C

140 MPa

250.0 °C

135 MPa

300.0 °C

130 MPa

350.0 °C

125 MPa

400.0 °C

120 MPa

450.0 °C

110 MPa

500.0 °C

100 MPa

550.0 °C

90 MPa

Yield strength Rp0.2, transverse

20.0 °C

180 MPa

Yield strength Rp1.0

20.0 °C

210 MPa

50.0 °C

198 MPa

100.0 °C

185 MPa

150.0 °C

175 MPa

200.0 °C

170 MPa

250.0 °C

165 MPa

300.0 °C

160 MPa

350.0 °C

155 MPa

400.0 °C

150 MPa

450.0 °C

140 MPa

500.0 °C

130 MPa

550.0 °C

120 MPa

Yield strength Rp1.0, transverse

20.0 °C

210 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.36E-5 1/K

20.0 °C

1.46E-5 1/K

100.0 °C

1.51E-5 - 1.6E-5 1/K

200.0 °C

1.57E-5 - 1.6E-5 1/K

300.0 °C

1.6E-5 - 1.62E-5 1/K

400.0 °C

1.65E-5 - 1.66E-5 1/K

500.0 °C

1.65E-5 - 1.7E-5 1/K

600.0 °C

1.74E-5 1/K

700.0 °C

1.77E-5 1/K

800.0 °C

1.8E-5 1/K

900.0 °C

1.83E-5 1/K

1000.0 °C

1.86E-5 1/K

Melting point

1230 - 1480 °C

Typical for Austenitic Stainless Steel

Specific heat capacity

-100.0 °C

440 J/(kg·K)

20.0 °C

472 - 475 J/(kg·K)

100.0 °C

487 J/(kg·K)

200.0 °C

503 J/(kg·K)

300.0 °C

512 J/(kg·K)

400.0 °C

520 J/(kg·K)

500.0 °C

530 J/(kg·K)

600.0 °C

541 J/(kg·K)

700.0 °C

551 J/(kg·K)

800.0 °C

559 J/(kg·K)

900.0 °C

565 J/(kg·K)

1000.0 °C

571 J/(kg·K)

Thermal conductivity

20.0 °C

11.5 - 12 W/(m·K)

100.0 °C

13.1 W/(m·K)

200.0 °C

14.8 W/(m·K)

300.0 °C

16.4 W/(m·K)

400.0 °C

18.1 W/(m·K)

500.0 °C

19.6 W/(m·K)

600.0 °C

21.2 W/(m·K)

700.0 °C

22.8 W/(m·K)

800.0 °C

24.3 W/(m·K)

900.0 °C

25.7 W/(m·K)

1000.0 °C

27.3 W/(m·K)

Thermal diffusivity

20.0 °C

3.1 mm²/s

100.0 °C

3.3 mm²/s

200.0 °C

3.6 mm²/s

300.0 °C

3.9 mm²/s

400.0 °C

4.2 mm²/s

500.0 °C

4.4 mm²/s

600.0 °C

4.6 mm²/s

700.0 °C

4.9 mm²/s

800.0 °C

5.2 mm²/s

900.0 °C

5.5 mm²/s

1000.0 °C

5.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

9.9E-7 - 1.01E-6 Ω·m

100.0 °C

1.04E-6 Ω·m

200.0 °C

1.08E-6 Ω·m

300.0 °C

1.12E-6 Ω·m

400.0 °C

1.15E-6 Ω·m

500.0 °C

1.18E-6 Ω·m

600.0 °C

1.2E-6 Ω·m

700.0 °C

1.22E-6 Ω·m

800.0 °C

1.24E-6 Ω·m

900.0 °C

1.26E-6 Ω·m

1000.0 °C

1.27E-6 Ω·m

Chemical properties

PropertyValue

Aluminium

0.15 - 0.45 %

Carbon

0.03 %

Chromium

20 - 23 %

Manganese

1 %

Nickel

32 - 35 %

Phosphorus

0.02 %

Silicon

0.7 %

Sulfur

0.015 %

Titanium

0.6 %


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