SEW 400 Grade X2CrNiMnMoNbN25-18-5-4 quenched (+Q)
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SEW 400 Grade X2CrNiMnMoNbN25-18-5-4 quenched (+Q)

SEW 400 Grade X2CrNiMnMoNbN25-18-5-4 quenched (+Q) introduction

Properties:
- austenitic special high-grade steel with very good strength and corrosion resistance to chloride containing media, in acids, mixing acids and contaminated aggressive media
- does not possess the good corrosion characteristics like the 1,4505 in sulfur and phosphoric acid
Application:
- in the environmental technology, for compressors and agitators
- in the marine engineering (seawater desalination), in the case of conveyance and transport of crude oil
- in plants of the cellulose and paper industry.

Equivalent material: EN X2CrNiMnMoN25-18-6-5, DIN 1.4565, AISI S34565, SAE S34565, EN X3CrNiMnMoNbN23-17-5-3, EN 1.4565, ASTM S34565, ASTM F49, UNS S34565

SEW 400 Grade X2CrNiMnMoNbN25-18-5-4 quenched (+Q) general

Property Temperature Value
Density 20.0 °C Density of 7.76 - 8 g/cm³

SEW 400 Grade X2CrNiMnMoNbN25-18-5-4 quenched (+Q) thermal

Property Temperature Value Comment
Coefficient of thermal expansion -100.0 °C Coefficient of thermal expansion of 1.49E-5 1/K -
- 20.0 °C Coefficient of thermal expansion of 1.61E-5 1/K -
- 100.0 °C Coefficient of thermal expansion of 1.58E-5 - 1.67E-5 1/K -
- 200.0 °C Coefficient of thermal expansion of 1.61E-5 - 1.72E-5 1/K -
- 300.0 °C Coefficient of thermal expansion of 1.65E-5 - 1.77E-5 1/K -
- 400.0 °C Coefficient of thermal expansion of 1.69E-5 - 1.81E-5 1/K -
- 500.0 °C Coefficient of thermal expansion of 1.73E-5 - 1.84E-5 1/K -
- 600.0 °C Coefficient of thermal expansion of 1.88E-5 1/K -
- 700.0 °C Coefficient of thermal expansion of 1.91E-5 1/K -
- 800.0 °C Coefficient of thermal expansion of 1.94E-5 1/K -
- 900.0 °C Coefficient of thermal expansion of 1.97E-5 1/K -
- 1000.0 °C Coefficient of thermal expansion of 2E-5 1/K -
Melting point - Melting point of 1230 - 1480 °C Typical for Austenitic Stainless Steel
Specific heat capacity -100.0 °C Specific heat capacity of 440 J/(kg·K) -
- 20.0 °C Specific heat capacity of 450 - 472 J/(kg·K) -
- 100.0 °C Specific heat capacity of 487 J/(kg·K) -
- 200.0 °C Specific heat capacity of 503 J/(kg·K) -
- 300.0 °C Specific heat capacity of 512 J/(kg·K) -
- 400.0 °C Specific heat capacity of 520 J/(kg·K) -
- 500.0 °C Specific heat capacity of 530 J/(kg·K) -
- 600.0 °C Specific heat capacity of 541 J/(kg·K) -
- 700.0 °C Specific heat capacity of 551 J/(kg·K) -
- 800.0 °C Specific heat capacity of 559 J/(kg·K) -
- 900.0 °C Specific heat capacity of 565 J/(kg·K) -
- 1000.0 °C Specific heat capacity of 571 J/(kg·K) -
Thermal conductivity 20.0 °C Thermal conductivity of 11.9 - 12 W/(m·K) -
- 100.0 °C Thermal conductivity of 13.3 W/(m·K) -
- 200.0 °C Thermal conductivity of 15.1 W/(m·K) -
- 300.0 °C Thermal conductivity of 16.7 W/(m·K) -
- 400.0 °C Thermal conductivity of 18.3 W/(m·K) -
- 500.0 °C Thermal conductivity of 19.8 W/(m·K) -
- 600.0 °C Thermal conductivity of 21.3 W/(m·K) -
- 700.0 °C Thermal conductivity of 22.8 W/(m·K) -
- 800.0 °C Thermal conductivity of 24.3 W/(m·K) -
- 900.0 °C Thermal conductivity of 25.7 W/(m·K) -
- 1000.0 °C Thermal conductivity of 27.1 W/(m·K) -
Thermal diffusivity 20.0 °C Thermal diffusivity of 3.3 mm²/s -
- 100.0 °C Thermal diffusivity of 3.4 mm²/s -
- 200.0 °C Thermal diffusivity of 3.7 mm²/s -
- 300.0 °C Thermal diffusivity of 4.1 mm²/s -
- 400.0 °C Thermal diffusivity of 4.3 mm²/s -
- 500.0 °C Thermal diffusivity of 4.5 mm²/s -
- 600.0 °C Thermal diffusivity of 4.7 mm²/s -
- 700.0 °C Thermal diffusivity of 5 mm²/s -
- 800.0 °C Thermal diffusivity of 5.4 mm²/s -
- 900.0 °C Thermal diffusivity of 5.7 mm²/s -
- 1000.0 °C Thermal diffusivity of 5.8 mm²/s -

SEW 400 Grade X2CrNiMnMoNbN25-18-5-4 quenched (+Q) chemical

Property Value
Carbon Carbon of 0.04 %
Chromium Chromium of 21 - 25 %
Manganese Manganese of 4.5 - 6.5 %
Molybdenum Molybdenum of 3 - 4.5 %
Nickel Nickel of 15 - 18 %
Niobium Niobium of 0.3 %
Nitrogen Nitrogen of 0.3 - 0.5 %
Phosphorus Phosphorus of 0.03 %
Silicon Silicon of 1 %
Sulfur Sulfur of 0.015 %

SEW 400 Grade X2CrNiMnMoNbN25-18-5-4 quenched (+Q) electrical

Property Temperature Value
Electrical resistivity 20.0 °C Electrical resistivity of 9.59E-7 - 1E-6 Ω·m
- 100.0 °C Electrical resistivity of 1.01E-6 Ω·m
- 200.0 °C Electrical resistivity of 1.05E-6 Ω·m
- 300.0 °C Electrical resistivity of 1.1E-6 Ω·m
- 400.0 °C Electrical resistivity of 1.13E-6 Ω·m
- 500.0 °C Electrical resistivity of 1.17E-6 Ω·m
- 600.0 °C Electrical resistivity of 1.19E-6 Ω·m
- 700.0 °C Electrical resistivity of 1.22E-6 Ω·m
- 800.0 °C Electrical resistivity of 1.24E-6 Ω·m
- 900.0 °C Electrical resistivity of 1.26E-6 Ω·m
- 1000.0 °C Electrical resistivity of 1.28E-6 Ω·m

SEW 400 Grade X2CrNiMnMoNbN25-18-5-4 quenched (+Q) mechanical

Property Temperature Value Comment
Elastic modulus -100.0 °C Elastic modulus of 206 GPa -
- 20.0 °C Elastic modulus of 196 - 198 GPa -
- 100.0 °C Elastic modulus of 190 - 193 GPa -
- 200.0 °C Elastic modulus of 182 - 183 GPa -
- 300.0 °C Elastic modulus of 174 - 175 GPa -
- 400.0 °C Elastic modulus of 166 - 172 GPa -
- 500.0 °C Elastic modulus of 158 - 159 GPa -
- 600.0 °C Elastic modulus of 150 GPa -
- 700.0 °C Elastic modulus of 142 GPa -
- 800.0 °C Elastic modulus of 134 GPa -
- 900.0 °C Elastic modulus of 127 GPa -
- 1000.0 °C Elastic modulus of 120 GPa -
Elongation 20.0 °C Elongation of 35 % -
Elongation, transverse 20.0 °C Elongation, transverse of 30 - 35 % -
Poisson's ratio 23.0 °C Poisson's ratio of 0.3 [-] Typical for Austenitic Stainless Steel
Shear modulus 23.0 °C Shear modulus of 77 GPa Typical for Austenitic Stainless Steel
Tensile strength 20.0 °C Tensile strength of 800 - 950 MPa -
Tensile strength, transverse 20.0 °C Tensile strength, transverse of 800 - 950 MPa -
Yield strength Rp0.2 20.0 °C Yield strength Rp0.2 of 420 MPa -
- 50.0 °C Yield strength Rp0.2 of 400 MPa -
- 100.0 °C Yield strength Rp0.2 of 350 MPa -
- 150.0 °C Yield strength Rp0.2 of 310 MPa -
- 200.0 °C Yield strength Rp0.2 of 270 MPa -
- 250.0 °C Yield strength Rp0.2 of 255 MPa -
- 300.0 °C Yield strength Rp0.2 of 240 MPa -
- 350.0 °C Yield strength Rp0.2 of 225 MPa -
- 400.0 °C Yield strength Rp0.2 of 210 MPa -
- 450.0 °C Yield strength Rp0.2 of 210 MPa -
- 500.0 °C Yield strength Rp0.2 of 210 MPa -
- 550.0 °C Yield strength Rp0.2 of 200 MPa -
Yield strength Rp0.2, transverse 20.0 °C Yield strength Rp0.2, transverse of 420 - 460 MPa -
Yield strength Rp1.0 20.0 °C Yield strength Rp1.0 of 460 MPa -
- 50.0 °C Yield strength Rp1.0 of 435 MPa -
- 100.0 °C Yield strength Rp1.0 of 400 MPa -
- 150.0 °C Yield strength Rp1.0 of 355 MPa -
- 200.0 °C Yield strength Rp1.0 of 310 MPa -
- 250.0 °C Yield strength Rp1.0 of 290 MPa -
- 300.0 °C Yield strength Rp1.0 of 270 MPa -
- 350.0 °C Yield strength Rp1.0 of 255 MPa -
- 400.0 °C Yield strength Rp1.0 of 240 MPa -
- 450.0 °C Yield strength Rp1.0 of 240 MPa -
- 500.0 °C Yield strength Rp1.0 of 240 MPa -
- 550.0 °C Yield strength Rp1.0 of 230 MPa -
Yield strength Rp1.0, transverse 20.0 °C Yield strength Rp1.0, transverse of 460 MPa -

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