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EN 10088‑1 Grade X1NiCrMoCu25‑20‑5 – Solution Annealed, Optimized for High‑Temperature Pressure Vessels

Material X 1 NiCrMoCu 25 20 5 (X1NiCrMoCu25-20-5), material number 1.4539 is applicated for pressure vessels acc. to TRB 100 and AD-data sheet W 2 and W 10 from -60 to 400 °C., for steam boilers acc. to TRD 101, TRD 102 and TRD 107 up to 400 °C. as well as for pressure gas tanks as per TRG from -60 to 400 °C. Further application in nuclear power engineering as far as nuclear regulations or object-related specifications permit use from -60 to 400 °C. The welding suitability is examined allowing for generally accepted engineering rules for arc welding, TIG-welding, submerged and plasma welding. Preheating is not necessary, intermediate temperature should not exceed 100 °C. Heat treatment after welding is only in special cases (particular corrosion load) necessary (solution annealing and quenching). This material is cold and warm formable and resistant to intercrystalline corrosion in delivery and welded condition without heat treatment up to 400 °C. To the material acc. to DIN EN 10088-1 : 1995-08 applies: Material X1NiCrMoCu25-20-5 is comparable to X 1 NiCrMoCuN 25 20 5 acc. to SEW 400 : 1991-02. It is an austenitic steel with high resistance to strongly attacking organic and inorganic acids, with high resistance to pitting corrosion and wide resistance to stress corrosion. It shows the second best pitting index of all steels after 1.4529 (functional sum 39). The material is resistant to intercrystalline corrosion also in welded condition. Application in chemical and petrochemical industry, for flue gas desulfurizing plants, in cellulose and paper industry as well as for smokestack linings.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.76 - 8 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

206 GPa

20.0 °C

195 - 196 GPa

100.0 °C

190 GPa

200.0 °C

182 GPa

300.0 °C

174 GPa

400.0 °C

166 GPa

500.0 °C

158 GPa

600.0 °C

150 GPa

700.0 °C

142 GPa

800.0 °C

134 GPa

900.0 °C

127 GPa

1000.0 °C

120 GPa

Elongation

20.0 °C

20 - 35 %

Elongation A80, transverse

20.0 °C

35 %

Elongation, transverse

20.0 °C

30 - 35 %

Hardness, Brinell

20.0 °C

230 [-]

Hardness, Brinell, trans

20.0 °C

230 [-]

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

520 - 1100 MPa

Tensile strength, transverse

20.0 °C

520 - 730 MPa

Yield strength Rp0.2

20.0 °C

230 - 400 MPa

100.0 °C

205 MPa

150.0 °C

190 MPa

200.0 °C

175 MPa

250.0 °C

160 MPa

300.0 °C

145 MPa

350.0 °C

135 MPa

400.0 °C

125 MPa

450.0 °C

115 MPa

500.0 °C

110 MPa

550.0 °C

105 MPa

Yield strength Rp0.2, transverse

20.0 °C

220 - 240 MPa

Yield strength Rp1.0

20.0 °C

260 MPa

100.0 °C

235 MPa

150.0 °C

220 MPa

200.0 °C

205 MPa

250.0 °C

190 MPa

300.0 °C

175 MPa

350.0 °C

165 MPa

400.0 °C

155 MPa

450.0 °C

145 MPa

500.0 °C

140 MPa

550.0 °C

135 MPa

Yield strength Rp1.0, transverse

20.0 °C

260 - 270 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.49E-5 1/K

20.0 °C

1.61E-5 1/K

100.0 °C

1.58E-5 - 1.67E-5 1/K

200.0 °C

1.61E-5 - 1.72E-5 1/K

300.0 °C

1.65E-5 - 1.77E-5 1/K

400.0 °C

1.69E-5 - 1.81E-5 1/K

500.0 °C

1.73E-5 - 1.84E-5 1/K

600.0 °C

1.88E-5 1/K

700.0 °C

1.91E-5 1/K

800.0 °C

1.94E-5 1/K

900.0 °C

1.97E-5 1/K

1000.0 °C

2E-5 1/K

Max service temperature, long

-196 - 400 °C

Melting point

1230 - 1480 °C

Typical for Austenitic Stainless Steel

Specific heat capacity

-100.0 °C

440 J/(kg·K)

20.0 °C

450 - 472 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

11.9 - 12 W/(m·K)

100.0 °C

13.3 W/(m·K)

200.0 °C

15.1 W/(m·K)

300.0 °C

16.7 W/(m·K)

400.0 °C

18.3 W/(m·K)

500.0 °C

19.8 W/(m·K)

600.0 °C

21.3 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

27.1 W/(m·K)

Thermal diffusivity

20.0 °C

3.3 mm²/s

100.0 °C

3.4 mm²/s

200.0 °C

3.7 mm²/s

300.0 °C

4.1 mm²/s

400.0 °C

4.3 mm²/s

500.0 °C

4.5 mm²/s

600.0 °C

4.7 mm²/s

700.0 °C

5 mm²/s

800.0 °C

5.4 mm²/s

900.0 °C

5.7 mm²/s

1000.0 °C

5.8 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

9.59E-7 - 1E-6 Ω·m

100.0 °C

1.01E-6 Ω·m

200.0 °C

1.05E-6 Ω·m

300.0 °C

1.1E-6 Ω·m

400.0 °C

1.13E-6 Ω·m

500.0 °C

1.17E-6 Ω·m

600.0 °C

1.19E-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

1.28E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.02 %

Chromium

19 - 21 %

Copper

1.2 - 2 %

Manganese

2 %

Molybdenum

4 - 5 %

Nickel

24 - 26 %

Nitrogen

0.15 %

Phosphorus

0.03 %

Silicon

0.7 %

Sulfur

0.01 %


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