EN 10028-7 Grade X6CrNiMoTi17-12-2 – Solution‑Annealed (AT) – Superior Corrosion‑Resistant Steel
The austenitic steel X6CrNiMoTi17-12-2 is the sensitized by Ti variant of 1.4401. Increased corrosion resistance especially to nonoxidizing acids and halogenated media due to the high Mo-cotent. Increased resistance to intercrystalline corrosion even in sensitized condition due to the Ti-content. Material is unusable for mirror-polishing, in opposition to 1.4404. Allowed for pressure vessel construction up to 300 °C, up to 550 °C if there are no media causing intercrystalline corrosion. The steel is applicated in civil engineering due to its high corrosion resistance and strength for masonry anchorage coupler in concrete, as reinforcing steel for chimney, facades and sanitary engineering. The Mo-alloyed steel is permitted for structural parts (extended approval certificate Nr. Z-30.44.1 of the Institut für Bautechnik Berlin, dated 01/02/1989. In this approval certificate are scheduled material, calculation, construction and monitoring demands. Strength grades E 225 and E355 are common. Application: in chemical apparatus engineering preferable for textile-, sulfite- cellulose, fatty acid- rubber and coloring industry Application temperatur: -200 to 550 °C
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General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 7.96 - 8 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | -100.0 °C | 206 GPa | |
20.0 °C | 196 - 200 GPa | ||
100.0 °C | 190 - 194 GPa | ||
200.0 °C | 182 - 186 GPa | ||
300.0 °C | 174 - 179 GPa | ||
400.0 °C | 166 - 172 GPa | ||
500.0 °C | 158 - 165 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 A80, transverse | 20.0 °C | 40 % | |
Elongation, transverse | 20.0 °C | 40 % | |
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 - 690 MPa | |
50.0 °C | 490 MPa | ||
100.0 °C | 440 MPa | ||
150.0 °C | 410 MPa | ||
200.0 °C | 390 MPa | ||
250.0 °C | 385 MPa | ||
300.0 °C | 375 MPa | ||
350.0 °C | 375 MPa | ||
400.0 °C | 375 MPa | ||
450.0 °C | 370 MPa | ||
500.0 °C | 360 MPa | ||
550.0 °C | 330 MPa | ||
Tensile strength, transverse | 20.0 °C | 520 - 690 MPa | |
Yield strength Rp0.2 | 50.0 °C | 207 MPa | |
100.0 °C | 185 MPa | ||
150.0 °C | 177 MPa | ||
200.0 °C | 167 MPa | ||
250.0 °C | 157 MPa | ||
300.0 °C | 145 MPa | ||
350.0 °C | 140 MPa | ||
400.0 °C | 135 MPa | ||
450.0 °C | 131 MPa | ||
500.0 °C | 129 MPa | ||
550.0 °C | 127 MPa | ||
Yield strength Rp0.2, transverse | 20.0 °C | 220 - 240 MPa | |
Yield strength Rp1.0 | 50.0 °C | 244 MPa | |
100.0 °C | 218 MPa | ||
150.0 °C | 206 MPa | ||
200.0 °C | 196 MPa | ||
250.0 °C | 186 MPa | ||
300.0 °C | 175 MPa | ||
350.0 °C | 169 MPa | ||
400.0 °C | 164 MPa | ||
450.0 °C | 160 MPa | ||
500.0 °C | 158 MPa | ||
550.0 °C | 157 MPa | ||
Yield strength Rp1.0, transverse | 20.0 °C | 260 - 270 MPa | |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | -100.0 °C | 1.49E-5 1/K | |
20.0 °C | 1.61E-5 1/K | ||
100.0 °C | 1.65E-5 - 1.67E-5 1/K | ||
200.0 °C | 1.72E-5 - 1.75E-5 1/K | ||
300.0 °C | 1.77E-5 - 1.8E-5 1/K | ||
400.0 °C | 1.81E-5 - 1.85E-5 1/K | ||
500.0 °C | 1.84E-5 - 1.9E-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 | -200 - 550 °C | ||
Melting point | 1230 - 1480 °C | Typical for Austenitic Stainless Steel | |
Specific heat capacity | -100.0 °C | 440 J/(kg·K) | |
20.0 °C | 472 - 500 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 | 13.3 - 15 W/(m·K) | |
100.0 °C | 14.9 W/(m·K) | ||
200.0 °C | 16.5 W/(m·K) | ||
300.0 °C | 18.1 W/(m·K) | ||
400.0 °C | 19.5 W/(m·K) | ||
500.0 °C | 21 W/(m·K) | ||
600.0 °C | 22.4 W/(m·K) | ||
700.0 °C | 23.8 W/(m·K) | ||
800.0 °C | 25.2 W/(m·K) | ||
Thermal diffusivity | 20.0 °C | 3.5 mm²/s | |
100.0 °C | 3.8 mm²/s | ||
200.0 °C | 4 mm²/s | ||
300.0 °C | 4.3 mm²/s | ||
400.0 °C | 4.5 mm²/s | ||
500.0 °C | 4.7 mm²/s | ||
600.0 °C | 4.8 mm²/s | ||
700.0 °C | 5.1 mm²/s | ||
800.0 °C | 5.4 mm²/s | ||
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 20.0 °C | 7.5E-7 - 7.91E-7 Ω·m |
100.0 °C | 8.45E-7 Ω·m | |
200.0 °C | 9.19E-7 Ω·m | |
300.0 °C | 9.77E-7 Ω·m | |
400.0 °C | 1.03E-6 Ω·m | |
500.0 °C | 1.08E-6 Ω·m | |
600.0 °C | 1.12E-6 Ω·m | |
700.0 °C | 1.15E-6 Ω·m | |
800.0 °C | 1.18E-6 Ω·m | |
Chemical properties
| Property | Value |
|---|---|
Carbon | 0.08 % |
Chromium | 16.5 - 18.5 % |
Manganese | 2 % |
Molybdenum | 2 - 2.5 % |
Nickel | 10.5 - 13.5 % |
Phosphorus | 0.05 % |
Silicon | 1 % |
Sulfur | 0.015 % |
Titanium | 0.7 % |
Metal
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