Sandvik 2RE69

Sandvik 2RE69

Sandvik 2RE69 introduction

Sandvik 2RE69 is a fully austenitic stainless steel with extra low carbon and impurity contents. The grade is characterized by:

Excellent resistance to corrosion in ammonium carbamate and nitric acid
Excellent resistance to intergranular corrosion
High resistance to pitting and crevice corrosion
Good weldability

Sandvik 2RE69 has been developed primarily to cope with the severe corrosive conditions existing in the urea industry. The longest service life is so far 35 years, which confirms the optimal properties for the grade Sandvik 2RE69 in urea strippers.

More technical information and charts that are relevant to the materials corrosion, mechanical and physical performance are displayed in the figures on the right side of the material page.

Datasheet URL:
Sandvik 2RE69

Datasheet updated 2019-12-10 07:15 (supersedes all previous editions)

Equivalent material: UNS S31050, EN 1.4466, EN X1CrNiMoN25-22-2, DIN 1.4466, DIN 1.4465, DIN X2CrNiMo25-22-2, DIN X1/CrNiMoN25-25-2, AFNOR Z1CND25.22AZ

Sandvik 2RE69 general

Property Temperature Value Comment
Density 23.0 °C Density of 7.9 g/cm³ -
Recycled Content - Recycled Content of 82.1 % Average recycled content

Sandvik 2RE69 thermal

Property Temperature Value Comment
Coefficient of thermal expansion 100.0 °C Coefficient of thermal expansion of 1.55E-5 1/K for 30°C to the mentioned temperature
- 200.0 °C Coefficient of thermal expansion of 1.6E-5 1/K for 30°C to the mentioned temperature
- 300.0 °C Coefficient of thermal expansion of 1.65E-5 1/K for 30°C to the mentioned temperature
- 400.0 °C Coefficient of thermal expansion of 1.7E-5 1/K for 30°C to the mentioned temperature
- 500.0 °C Coefficient of thermal expansion of 1.7E-5 1/K for 30°C to the mentioned temperature
- 600.0 °C Coefficient of thermal expansion of 1.7E-5 1/K for 30°C to the mentioned temperature
- 700.0 °C Coefficient of thermal expansion of 1.75E-5 1/K for 30°C to the mentioned temperature
Specific heat capacity 20.0 °C Specific heat capacity of 485 J/(kg·K) -
- 100.0 °C Specific heat capacity of 505 J/(kg·K) -
- 200.0 °C Specific heat capacity of 540 J/(kg·K) -
- 300.0 °C Specific heat capacity of 565 J/(kg·K) -
- 400.0 °C Specific heat capacity of 585 J/(kg·K) -
- 500.0 °C Specific heat capacity of 605 J/(kg·K) -
- 600.0 °C Specific heat capacity of 615 J/(kg·K) -
- 700.0 °C Specific heat capacity of 625 J/(kg·K) -
Thermal conductivity 20.0 °C Thermal conductivity of 13 W/(m·K) -
- 100.0 °C Thermal conductivity of 15 W/(m·K) -
- 200.0 °C Thermal conductivity of 17 W/(m·K) -
- 300.0 °C Thermal conductivity of 19 W/(m·K) -
- 400.0 °C Thermal conductivity of 21 W/(m·K) -
- 500.0 °C Thermal conductivity of 23 W/(m·K) -
- 600.0 °C Thermal conductivity of 25 W/(m·K) -
- 700.0 °C Thermal conductivity of 26 W/(m·K) -

Sandvik 2RE69 chemical

Property Value Comment
Carbon Carbon of 0.02 % max.
Chromium Chromium of 25 % -
Iron -
Manganese Manganese of 1.7 % -
Molybdenum Molybdenum of 2.1 % -
Nickel Nickel of 22 % -
Nitrogen Nitrogen of 0.12 % -
Phosphorus Phosphorus of 0.02 % max.
Silicon Silicon of 0.4 % max.
Sulfur Sulfur of 0.01 % max.

Sandvik 2RE69 electrical

Property Temperature Value Comment
Relative magnetic permeability 23.0 °C Relative magnetic permeability of 1 [-] at 6400–55700 A/m

Sandvik 2RE69 mechanical

Property Temperature Value Comment
Charpy impact energy -270.0 °C Charpy impact energy of 60 J min., EN 13445-2 (UFPV-2) and EN 10216-5
- -196.0 °C Charpy impact energy of 60 J min., EN 13445-2 (UFPV-2) and EN 10216-5
Elastic modulus 20.0 °C Elastic modulus of 195 GPa -
- 100.0 °C Elastic modulus of 190 GPa -
- 200.0 °C Elastic modulus of 182 GPa -
- 300.0 °C Elastic modulus of 174 GPa -
- 400.0 °C Elastic modulus of 166 GPa -
- 500.0 °C Elastic modulus of 158 GPa -
Elongation 23.0 °C Elongation of 30 % min., Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
Elongation A2 23.0 °C Elongation A2 of 25 % min., Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
Hardness, Rockwell B 23.0 °C Hardness, Rockwell B of 95 [-] max.
Tensile strength 20.0 °C Tensile strength of 580 - 780 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 50.0 °C Tensile strength of 555 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 100.0 °C Tensile strength of 530 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 150.0 °C Tensile strength of 510 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 200.0 °C Tensile strength of 500 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 250.0 °C Tensile strength of 490 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 300.0 °C Tensile strength of 480 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 350.0 °C Tensile strength of 470 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 400.0 °C Tensile strength of 460 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 450.0 °C Tensile strength of 455 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
- 500.0 °C Tensile strength of 450 MPa Requirements according to EN 1.4466, W.-Nr. 1.4465 and AFNOR can be fulfilled on request.
Yield strength Rp0.1 20.0 °C Yield strength Rp0.1 of 300 MPa min.
- 50.0 °C Yield strength Rp0.1 of 285 MPa min.
- 100.0 °C Yield strength Rp0.1 of 260 MPa min.
- 150.0 °C Yield strength Rp0.1 of 245 MPa min.
- 200.0 °C Yield strength Rp0.1 of 230 MPa min.
- 250.0 °C Yield strength Rp0.1 of 215 MPa min.
- 300.0 °C Yield strength Rp0.1 of 205 MPa min.
- 350.0 °C Yield strength Rp0.1 of 195 MPa min.
- 400.0 °C Yield strength Rp0.1 of 185 MPa min.
- 450.0 °C Yield strength Rp0.1 of 175 MPa min.
- 500.0 °C Yield strength Rp0.1 of 170 MPa min.
- 550.0 °C Yield strength Rp0.1 of 146 MPa min.
Yield strength Rp0.2 20.0 °C Yield strength Rp0.2 of 270 MPa min.
- 50.0 °C Yield strength Rp0.2 of 250 MPa min.
- 100.0 °C Yield strength Rp0.2 of 230 MPa min.
- 150.0 °C Yield strength Rp0.2 of 215 MPa min.
- 200.0 °C Yield strength Rp0.2 of 200 MPa min.
- 250.0 °C Yield strength Rp0.2 of 190 MPa min.
- 300.0 °C Yield strength Rp0.2 of 175 MPa min.
- 350.0 °C Yield strength Rp0.2 of 165 MPa min.
- 400.0 °C Yield strength Rp0.2 of 155 MPa min.
- 450.0 °C Yield strength Rp0.2 of 145 MPa min.
- 500.0 °C Yield strength Rp0.2 of 140 MPa min.
- 550.0 °C Yield strength Rp0.2 of 121 MPa min.

Sandvik 2RE69 application

Property - -
Application areas Stripper tubes Stamicarbon, Montedison IDR
Outer layer of bimetallic (stripper tubes) Saipem
Ferrules All processes
Carbamate condensers All processes
Decomposers Montedison
Reactor coils UTI

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