Sanicro® 25

Sanicro® 25

Sanicro® 25 introduction

Sanicro® 25 is an austenitic 22Cr25NiWCoCu stainless steel material with excellent high temperature properties, designed for use in advanced pulverized coal fired steam boilers. The grade is characterized by:

Very high creep strength
High oxidation resistance
High structural stability
Good fabricability

Datasheet URL:
Sanicro® 25

Datasheet updated 2020-08-20 14:48 (supersedes all previous editions)

Equivalent material: UNS S31035, EN 1.4990, EN X7NiCrWCuCoNb25-23-3-3-2

Sanicro® 25 general

Property Temperature Value Comment
Density 23.0 °C Density of 8.1 g/cm³ -
Recycled Content - Recycled Content of 82.1 % Average recycled content

Sanicro® 25 thermal

Property Temperature Value Comment
Coefficient of thermal expansion 100.0 °C Coefficient of thermal expansion of 1.45E-5 1/K for 30°C to the mentioned temperature
- 200.0 °C Coefficient of thermal expansion of 1.5E-5 1/K for 30°C to the mentioned temperature
- 300.0 °C Coefficient of thermal expansion of 1.6E-5 1/K for 30°C to the mentioned temperature
- 400.0 °C Coefficient of thermal expansion of 1.6E-5 1/K for 30°C to the mentioned temperature
- 500.0 °C Coefficient of thermal expansion of 1.65E-5 1/K for 30°C to the mentioned temperature
- 600.0 °C Coefficient of thermal expansion of 1.65E-5 1/K for 30°C to the mentioned temperature
- 700.0 °C Coefficient of thermal expansion of 1.7E-5 1/K for 30°C to the mentioned temperature
- 800.0 °C Coefficient of thermal expansion of 1.7E-5 1/K for 30°C to the mentioned temperature
- 900.0 °C Coefficient of thermal expansion of 1.75E-5 1/K for 30°C to the mentioned temperature
- 1000.0 °C Coefficient of thermal expansion of 1.8E-5 1/K for 30°C to the mentioned temperature
- 1100.0 °C Coefficient of thermal expansion of 1.85E-5 1/K for 30°C to the mentioned temperature
Max service temperature - Max service temperature of 750 °C -
Specific heat capacity 20.0 °C Specific heat capacity of 470 J/(kg·K) -
- 100.0 °C Specific heat capacity of 485 J/(kg·K) -
- 200.0 °C Specific heat capacity of 500 J/(kg·K) -
- 300.0 °C Specific heat capacity of 520 J/(kg·K) -
- 400.0 °C Specific heat capacity of 535 J/(kg·K) -
- 500.0 °C Specific heat capacity of 555 J/(kg·K) -
- 600.0 °C Specific heat capacity of 570 J/(kg·K) -
- 700.0 °C Specific heat capacity of 585 J/(kg·K) -
- 800.0 °C Specific heat capacity of 605 J/(kg·K) -
- 900.0 °C Specific heat capacity of 620 J/(kg·K) -
- 1000.0 °C Specific heat capacity of 640 J/(kg·K) -
- 1100.0 °C Specific heat capacity of 665 J/(kg·K) -
Thermal conductivity 20.0 °C Thermal conductivity of 12 W/(m·K) -
- 100.0 °C Thermal conductivity of 13 W/(m·K) -
- 200.0 °C Thermal conductivity of 15 W/(m·K) -
- 300.0 °C Thermal conductivity of 16 W/(m·K) -
- 400.0 °C Thermal conductivity of 18 W/(m·K) -
- 500.0 °C Thermal conductivity of 20 W/(m·K) -
- 600.0 °C Thermal conductivity of 22 W/(m·K) -
- 700.0 °C Thermal conductivity of 23 W/(m·K) -
- 800.0 °C Thermal conductivity of 25 W/(m·K) -
- 900.0 °C Thermal conductivity of 27 W/(m·K) -
- 1000.0 °C Thermal conductivity of 28 W/(m·K) -
- 1100.0 °C Thermal conductivity of 30 W/(m·K) -

Sanicro® 25 chemical

Property Value Comment
Carbon Carbon of 0.1 % max.
Chromium Chromium of 22.5 % -
Cobalt Cobalt of 1.5 % -
Copper Copper of 3 % -
Iron -
Manganese Manganese of 0.5 % -
Nickel Nickel of 25 % -
Niobium Niobium of 0.5 % -
Nitrogen Nitrogen of 0.23 % -
Phosphorus Phosphorus of 0.03 % max.
Silicon Silicon of 0.2 % -
Sulfur Sulfur of 0.015 % max.
Tungsten Tungsten of 3.6 % -

Sanicro® 25 electrical

Property Temperature Value
Electrical resistivity 20.0 °C Electrical resistivity of 9.8E-7 Ω·m

Sanicro® 25 mechanical

Property Temperature Value Comment
Creep strength 10^4 cycles 500.0 °C Creep strength 10^4 cycles of 500 MPa at 10000h
- 550.0 °C Creep strength 10^4 cycles of 380 MPa at 10000h
- 600.0 °C Creep strength 10^4 cycles of 310 MPa at 10000h
- 650.0 °C Creep strength 10^4 cycles of 230 MPa at 10000h
- 700.0 °C Creep strength 10^4 cycles of 145 MPa at 10000h
- 750.0 °C Creep strength 10^4 cycles of 85 MPa at 10000h
- 800.0 °C Creep strength 10^4 cycles of 50 MPa at 10000h
Creep strength 10^5 cycles 500.0 °C Creep strength 10^5 cycles of 405 MPa at 100000h
- 550.0 °C Creep strength 10^5 cycles of 325 MPa at 100000h
- 600.0 °C Creep strength 10^5 cycles of 230 MPa at 100000h
- 650.0 °C Creep strength 10^5 cycles of 155 MPa at 100000h
- 700.0 °C Creep strength 10^5 cycles of 95 MPa at 100000h
- 750.0 °C Creep strength 10^5 cycles of 50 MPa at 100000h
- 800.0 °C Creep strength 10^5 cycles of 25 MPa at 100000h
Elastic modulus 20.0 °C Elastic modulus of 197 GPa -
- 100.0 °C Elastic modulus of 191 GPa -
- 200.0 °C Elastic modulus of 183 GPa -
- 300.0 °C Elastic modulus of 175 GPa -
- 400.0 °C Elastic modulus of 168 GPa -
- 500.0 °C Elastic modulus of 160 GPa -
- 600.0 °C Elastic modulus of 153 GPa -
- 700.0 °C Elastic modulus of 145 GPa -
- 800.0 °C Elastic modulus of 137 GPa -
Elongation 23.0 °C Elongation of 40 % min.
Elongation A2 23.0 °C Elongation A2 of 40 % min.
Hardness, Vickers 23.0 °C Hardness, Vickers of 185 [-] -
Tensile strength 20.0 °C Tensile strength of 680 MPa min.
- 100.0 °C Tensile strength of 625 MPa min.
- 200.0 °C Tensile strength of 575 MPa min.
- 300.0 °C Tensile strength of 560 MPa min.
- 400.0 °C Tensile strength of 550 MPa min.
- 500.0 °C Tensile strength of 535 MPa min.
- 600.0 °C Tensile strength of 500 MPa min.
- 700.0 °C Tensile strength of 455 MPa min.
- 800.0 °C Tensile strength of 355 MPa min.
Yield strength Rp0.1 20.0 °C Yield strength Rp0.1 of 355 MPa min.
- 100.0 °C Yield strength Rp0.1 of 315 MPa min.
- 200.0 °C Yield strength Rp0.1 of 255 MPa min.
- 300.0 °C Yield strength Rp0.1 of 240 MPa min.
- 400.0 °C Yield strength Rp0.1 of 225 MPa min.
- 500.0 °C Yield strength Rp0.1 of 215 MPa min.
- 600.0 °C Yield strength Rp0.1 of 205 MPa min.
- 700.0 °C Yield strength Rp0.1 of 195 MPa min.
- 800.0 °C Yield strength Rp0.1 of 195 MPa min.
Yield strength Rp0.2 20.0 °C Yield strength Rp0.2 of 310 MPa min.
- 100.0 °C Yield strength Rp0.2 of 250 MPa min.
- 200.0 °C Yield strength Rp0.2 of 225 MPa min.
- 300.0 °C Yield strength Rp0.2 of 210 MPa min.
- 400.0 °C Yield strength Rp0.2 of 200 MPa min.
- 500.0 °C Yield strength Rp0.2 of 195 MPa min.
- 600.0 °C Yield strength Rp0.2 of 180 MPa min.
- 700.0 °C Yield strength Rp0.2 of 180 MPa min.
- 800.0 °C Yield strength Rp0.2 of 180 MPa min.

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