Alloy 90, UNS N07090, 2.4632, NiCr20Co18Ti - Nickel Alloy

Alloy 90, 2.4632, UNS N07090, Nimonic® 90 - nickel alloy according to BS HR202 AECMA PrEN 295 etc.

Alloy 90, 2.4632, Nimonic 90 – Description

Alloy 90 (UNS N07090) is a wrought, age-hardened nickel-chromium-cobalt alloy with titanium and aluminum alloying additions. It is heat-resistant and creep-resistant up to 920°C.

Applications

Used for gas turbine components (blades, discs, forgings, rings), in the automotive industry, for hot-working tool components, and for high-temperature springs.

Physical and Mechanical Properties

Room Temperature Physical Properties:

• Density: 8.18 g/cm³
• Liquidus: 1370 °C
• Solidus: 1310 °C

Thermal Expansion Coefficient, from 20°C to:

• 100°C: 12.7 μm/m⋅K
• 200°C: 13.3 μm/m⋅K
• 300°C: 13.7 μm/m⋅K
• 400°C: 14.0 μm/m⋅K
• 500°C: 14.3 μm/m⋅K
• 600°C: 14.8 μm/m⋅K
• 700°C: 15.3 μm/m⋅K
• 800°C: 16.2 μm/m⋅K
• 900°C: 17.1 μm/m⋅K
• 1000°C: 18.2 μm/m⋅K

Thermal Conductivity:

• 20°C: 11.47 W/m · K
• 100°C: 12.77 W/m · K
• 200°C: 14.44 W/m · K
• 300°C: 15.99 W/m · K
• 400°C: 17.54 W/m · K
• 500°C: 18.97 W/m · K
• 600°C: 20.64 W/m · K
• 700°C: 22.32 W/m · K
• 800°C: 23.99 W/m · K
• 900°C: 25.83 W/m · K
• 1000°C: 27.88 W/m · K

Specific Heat:

• 20°C: 446 J/kg⋅K
• 100°C: 467 J/kg⋅K
• 200°C: 494 J/kg⋅K
• 300°C: 520 J/kg⋅K
• 400°C: 547 J/kg⋅K
• 500°C: 572 J/kg⋅K
• 600°C: 600 J/kg⋅K
• 700°C: 626 J/kg⋅K
• 800°C: 652 J/kg⋅K
• 900°C: 679 J/kg⋅K
• 1000°C: 706 J/kg⋅K

Electrical Resistivity:

• 20°C: 1.18 μΩ·m
• 100°C: 1.21 μΩ·m
• 200°C: 1.23 μΩ·m
• 300°C: 1.26 μΩ·m
• 400°C: 1.28 μΩ·m
• 500°C: 1.31 μΩ·m
• 600°C: 1.31 μΩ·m
• 700°C: 1.31 μΩ·m
• 800°C: 1.31 μΩ·m
• 900°C: 1.30 μΩ·m
• 1000°C: 1.28 μΩ·m

Magnetic Permeability as a function of magnetic field intensity:

• 300: 1.0706
• 500: 1.0440
• 1000: 1.0231
• 1500: 1.0163
• 2000: 1.0130
• 2500: 1.0085
• 3000: 1.0073

Mechanical properties according to EN 10302 standard for alloy 2.4632:

• 20°C: Yield strength > 700 MPa; Tensile strength > 1100 MPa
• 100°C: Yield strength > 635 MPa
• 200°C: Yield strength > 610 MPa
• 300°C: Yield strength > 585 MPa
• 400°C: Yield strength > 565 MPa
• 500°C: Yield strength > 545 MPa
• 600°C: Yield strength > 530 MPa
• 700°C: Yield strength > 500 MPa
• 750°C: Yield strength > 465 MPa
• 800°C: Yield strength > 398 MPa

Modulus of Elasticity of Bars and Profiles (8h/1080°C/air cooling + 16h/700°C/air cooling):

• 20°C
  • Extruded bar: 204 GPa
  • Extruded + forged bar: 226 GPa
  • Extruded + cold-rolled profile: 222 GPa
• 100°C
  • Extruded bar: 199 GPa
  • Extruded + forged bar: 221 GPa
  • Extruded + cold-rolled profile: 219 GPa
• 200°C
  • Extruded bar: 194 GPa
  • Extruded + forged bar: 216 GPa
  • Extruded + cold-rolled profile: 214 GPa
• 300°C
  • Extruded bar: 188 GPa
  • Extruded + forged bar: 208 GPa
  • Extruded + cold-rolled profile: 208 GPa
• 400°C
  • Extruded bar: 181 GPa
  • Extruded + forged bar: 201 GPa
  • Extruded + cold-rolled profile: 200 GPa
• 500°C
  • Extruded bar: 174 GPa
  • Extruded + forged bar: 194 GPa
  • Extruded + cold-rolled profile: 193 GPa
• 600°C
  • Extruded bar: 168 GPa
  • Extruded + forged bar: 186 GPa
  • Extruded + cold-rolled profile: 185 GPa
• 700°C
  • Extruded bar: 159 GPa
  • Extruded + forged bar: 177 GPa
  • Extruded + cold-rolled profile: 177 GPa
• 800°C
  • Extruded bar: 150 GPa
  • Extruded + forged bar: 167 GPa
  • Extruded + cold-rolled profile: 166 GPa
• 900°C
  • Extruded bar: 137 GPa
  • Extruded + forged bar: 155 GPa
  • Extruded + cold-rolled profile: 154 GPa
• 1000°C
  • Extruded bar: 125 GPa
  • Extruded + forged bar: 141 GPa
  • Extruded + cold-rolled profile: 140 GPa

Modulus of Elasticity of Cold-Rolled Sheets  (3min/1150°C/bath cooling + 20min/1040°C/air cooling + 4h/750°C/air cooling):

• 20°C
  • Longitudinal modulus: 220 GPa
  • Transverse modulus: 83 GPa
• 100°C
  • Longitudinal modulus: 216 GPa
  • Transverse modulus: 82 GPa
• 200°C
  • Longitudinal modulus: 210 GPa
  • Transverse modulus: 80 GPa
• 300°C
  • Longitudinal modulus: 204 GPa
  • Transverse modulus: 77 GPa
• 400°C
  • Longitudinal modulus: 197 GPa
  • Transverse modulus: 74 GPa
• 500°C
  • Longitudinal modulus: 191 GPa
  • Transverse modulus: 71 GPa
• 600°C
  • Longitudinal modulus: 184 GPa
  • Transverse modulus: 68 GPa
• 700°C
  • Longitudinal modulus: 176 GPa
  • Transverse modulus: 65 GPa
• 800°C
  • Longitudinal modulus: 168 GPa
  • Transverse modulus: 61 GPa
• 900°C
  • Longitudinal modulus: 155 GPa
  • Transverse modulus: 57 GPa
• 1000°C
  • Longitudinal modulus: 142 GPa
  • Transverse modulus: 51 GPa

Tensile Properties of Bars, (8h/1080°C/air cool + 16h/700°C/air cool):

• 20°C
  • 0.1% Proof Stress: 729 MPa
  • 0.2% Proof Stress: 752 MPa
  • Tensile Strength: 1175 MPa
  • Elongation: 30%
  • Reduction of Area: 47%
• 100°C
  • 0.1% Proof Stress: 723 MPa
  • 0.2% Proof Stress: 742 MPa
  • Tensile Strength: 1148 MPa
  • Elongation: 27%
  • Reduction of Area: 46%
• 200°C
  • 0.1% Proof Stress: 689 MPa
  • 0.2% Proof Stress: 708 MPa
  • Tensile Strength: 1111 MPa
  • Elongation: 28%
  • Reduction of Area: 46%
• 300°C
  • 0.1% Proof Stress: 664 MPa
  • 0.2% Proof Stress: 681 MPa
  • Tensile Strength: 1087 MPa
  • Elongation: 29%
  • Reduction of Area: 48%
• 400°C
  • 0.1% Proof Stress: 661 MPa
  • 0.2% Proof Stress: 678 MPa
  • Tensile Strength: 1081 MPa
  • Elongation: 32%
  • Reduction of Area: 49%
• 500°C
  • 0.1% Proof Stress: 657 MPa
  • 0.2% Proof Stress: 672 MPa
  • Tensile Strength: 1038 MPa
  • Elongation: 31%
  • Reduction of Area: 49%
• 600°C
  • 0.1% Proof Stress: 657 MPa
  • 0.2% Proof Stress: 675 MPa
  • Tensile Strength: 1027 MPa
  • Elongation: 26%
  • Reduction of Area: 47%
• 700°C
  • 0.1% Proof Stress: 621 MPa
  • 0.2% Proof Stress: 640 MPa
  • Tensile Strength: 899 MPa
  • Elongation: 18%
  • Reduction of Area: 28%
• 800°C
  • 0.1% Proof Stress: 510 MPa
  • 0.2% Proof Stress: 532 MPa
  • Tensile Strength: 657 MPa
  • Elongation: 18%
  • Reduction of Area: 26%
• 900°C
  • 0.1% Proof Stress: 288 MPa
  • 0.2% Proof Stress: 306 MPa
  • Tensile Strength: 349 MPa
  • Elongation: 30%
  • Reduction of Area: 51%
• 1000°C
  • 0.1% Proof Stress: 45 MPa
  • 0.2% Proof Stress: 48 MPa
  • Tensile Strength: 76 MPa
  • Elongation: 130%
  • Reduction of Area: 99%

Mechanical Properties of Extruded and Forged Bars (8h/1080°C/air cooling + 16h/700°C/air cooling):

• 20°C
  • 0.1% Proof Stress: 791 MPa
  • 0.2% Proof Stress: 813 MPa
  • Tensile Strength: 1251 MPa
  • Elongation: 28%
  • Reduction of Area: 41%
• 100°C
  • 0.1% Proof Stress: 757 MPa
  • 0.2% Proof Stress: 777 MPa
  • Tensile Strength: 1202 MPa
  • Elongation: 26%
  • Reduction of Area: 42%
• 200°C
  • 0.1% Proof Stress: 732 MPa
  • 0.2% Proof Stress: 751 MPa
  • Tensile Strength: 1175 MPa
  • Elongation: 26%
  • Reduction of Area: 42%
• 300°C
  • 0.1% Proof Stress: 715 MPa
  • 0.2% Proof Stress: 734 MPa
  • Tensile Strength: 1169 MPa
  • Elongation: 28%
  • Reduction of Area: 43%
• 400°C
  • 0.1% Proof Stress: 715 MPa
  • 0.2% Proof Stress: 732 MPa
  • Tensile Strength: 1148 MPa
  • Elongation: 28%
  • Reduction of Area: 44%
• 500°C
  • 0.1% Proof Stress: 706 MPa
  • 0.2% Proof Stress: 726 MPa
  • Tensile Strength: 1120 MPa
  • Elongation: 28%
  • Reduction of Area: 43%
• 600°C
  • 0.1% Proof Stress: 698 MPa
  • 0.2% Proof Stress: 723 MPa
  • Tensile Strength: 1092 MPa
  • Elongation: 23%
  • Reduction of Area: 39%
• 700°C
  • 0.1% Proof Stress: 690 MPa
  • 0.2% Proof Stress: 711 MPa
  • Tensile Strength: 965 MPa
  • Elongation: 13%
  • Reduction of Area: 17%
• 800°C
  • 0.1% Proof Stress: 551 MPa
  • 0.2% Proof Stress: 573 MPa
  • Tensile Strength: 683 MPa
  • Elongation: 10%
  • Reduction of Area: 16%
• 900°C
  • 0.1% Proof Stress: 284 MPa
  • 0.2% Proof Stress: 300 MPa
  • Tensile Strength: 346 MPa
  • Elongation: 21%
  • Reduction of Area: 37%
• 1000°C
  • 0.1% Proof Stress: 45 MPa
  • 0.2% Proof Stress: 48 MPa
  • Tensile Strength: 76 MPa
  • Elongation: 77%
  • Reduction of Area: 97%

Tensile properties of extruded and cold-rolled forgings, (8h/1080°C/air-cool + 16h/700°C/air-cool):

• 20°C
  • 0.1% Proof Stress: 813 MPa
  • 0.2% Proof Stress: 831 MPa
  • Tensile Strength: 1265 MPa
  • Elongation: 30%
  • Reduction of Area: 45%
• 100°C
  • 0.1% Proof Stress: 791 MPa
  • 0.2% Proof Stress: 813 MPa
  • Tensile Strength: 1233 MPa
  • Elongation: 28%
  • Reduction of Area: 43%
• 200°C
  • 0.1% Proof Stress: 762 MPa
  • 0.2% Proof Stress: 777 MPa
  • Tensile Strength: 1203 MPa
  • Elongation: 29%
  • Reduction of Area: 45%
• 300°C
  • 0.1% Proof Stress: 742 MPa
  • 0.2% Proof Stress: 760 MPa
  • Tensile Strength: 1203 MPa
  • Elongation: 30%
  • Reduction of Area: 45%
• 400°C
  • 0.1% Proof Stress: 732 MPa
  • 0.2% Proof Stress: 748 MPa
  • Tensile Strength: 1189 MPa
  • Elongation: 33%
  • Reduction of Area: 44%
• 500°C
  • 0.1% Proof Stress: 726 MPa
  • 0.2% Proof Stress: 745 MPa
  • Tensile Strength: 1134 MPa
  • Elongation: 29%
  • Reduction of Area: 41%
• 600°C
  • 0.1% Proof Stress: 717 MPa
  • 0.2% Proof Stress: 748 MPa
  • Tensile Strength: 1135 MPa
  • Elongation: 25%
  • Reduction of Area: 41%
• 700°C
  • 0.1% Proof Stress: 703 MPa
  • 0.2% Proof Stress: 722 MPa
  • Tensile Strength: 986 MPa
  • Elongation: 22%
  • Reduction of Area: 22%
• 800°C
  • 0.1% Proof Stress: 573 MPa
  • 0.2% Proof Stress: 598 MPa
  • Tensile Strength: 717 MPa
  • Elongation: 23%
  • Reduction of Area: 26%
• 900°C
  • 0.1% Proof Stress: 332 MPa
  • 0.2% Proof Stress: 349 MPa
  • Tensile Strength: 388 MPa
  • Elongation: 34%
  • Reduction of Area: 46%
• 1000°C
  • 0.1% Proof Stress: 50 MPa
  • 0.2% Proof Stress: 54 MPa
  • Tensile Strength: 91 MPa
  • Elongation: 132%
  • Reduction of Area: 97%

Mechanical Properties of Cold-Rolled Sheets (3min/1150°C/cool in bath + 20min/1040°C/cool in air + 4h/700°C/cool in air):

• 20°C
  • 0.1% Proof Stress: 808 MPa
  • 0.2% Proof Stress: 831 MPa
  • Tensile Strength: 1180 MPa
  • Elongation: 23%
• 100°C
  • 0.1% Proof Stress: 764 MPa
  • 0.2% Proof Stress: 791 MPa
  • Tensile Strength: 1138 MPa
  • Elongation: 24%
• 200°C
  • 0.1% Proof Stress: 754 MPa
  • 0.2% Proof Stress: 780 MPa
  • Tensile Strength: 1104 MPa
  • Elongation: 26%
• 300°C
  • 0.1% Proof Stress: 741 MPa
  • 0.2% Proof Stress: 754 MPa
  • Tensile Strength: 1072 MPa
  • Elongation: 27%
• 400°C
  • 0.1% Proof Stress: 734 MPa
  • 0.2% Proof Stress: 754 MPa
  • Tensile Strength: 1038 MPa
  • Elongation: 28%
• 500°C
  • 0.1% Proof Stress: 717 MPa
  • 0.2% Proof Stress: 740 MPa
  • Tensile Strength: 995 MPa
  • Elongation: 30%
• 600°C
  • 0.1% Proof Stress: 701 MPa
  • 0.2% Proof Stress: 729 MPa
  • Tensile Strength: 961 MPa
  • Elongation: 23%
• 700°C
  • 0.1% Proof Stress: 680 MPa
  • 0.2% Proof Stress: 703 MPa
  • Tensile Strength: 848 MPa
  • Elongation: 8%
• 800°C
  • 0.1% Proof Stress: 505 MPa
  • 0.2% Proof Stress: 548 MPa
  • Tensile Strength: 669 MPa
  • Elongation: 6%
• 900°C
  • 0.1% Proof Stress: 272 MPa
  • 0.2% Proof Stress: 289 MPa
  • Tensile Strength: 346 MPa
  • Elongation: 16%
• 1000°C
  • 0.1% Proof Stress: 57 MPa
  • 0.2% Proof Stress: 62 MPa
  • Tensile Strength: 83 MPa
  • Elongation: 66%

Tensile properties of welded cold-rolled plates, (3min/1150°C/air cooling + WELD + 20min/1040°C/air cooling + 4h/700°C/air cooling):

• 20°C
  • 0.1% Proof Stress: 752 MPa
  • 0.2% Proof Stress: 794 MPa
  • Tensile Strength: 1115 MPa
  • Elongation: 17%
• 100°C
  • 0.1% Proof Stress: 754 MPa
  • 0.2% Proof Stress: 788 MPa
  • Tensile Strength: 1106 MPa
  • Elongation: 19%
• 200°C
  • 0.1% Proof Stress: 722 MPa
  • 0.2% Proof Stress: 752 MPa
  • Tensile Strength: 1067 MPa
  • Elongation: 19%
• 300°C
  • 0.1% Proof Stress: 695 MPa
  • 0.2% Proof Stress: 731 MPa
  • Tensile Strength: 1021 MPa
  • Elongation: 19%
• 400°C
  • 0.1% Proof Stress: 703 MPa
  • 0.2% Proof Stress: 729 MPa
  • Tensile Strength: 999 MPa
  • Elongation: 19%
• 500°C
  • 0.1% Proof Stress: 681 MPa
  • 0.2% Proof Stress: 714 MPa
  • Tensile Strength: 956 MPa
  • Elongation: 19%
• 600°C
  • 0.1% Proof Stress: 680 MPa
  • 0.2% Proof Stress: 709 MPa
  • Tensile Strength: 925 MPa
  • Elongation: 13%
• 700°C
  • 0.1% Proof Stress: 680 MPa
  • 0.2% Proof Stress: 714 MPa
  • Tensile Strength: 820 MPa
  • Elongation: 4%
• 800°C
  • 0.1% Proof Stress: 538 MPa
  • 0.2% Proof Stress: 563 MPa
  • Tensile Strength: 604 MPa
  • Elongation: 2%
• 900°C
  • 0.1% Proof Stress: 291 MPa
  • 0.2% Proof Stress: 312 MPa
  • Tensile Strength: 357 MPa
  • Elongation: 7%
• 1000°C
  • 0.1% Proof Stress: 54 MPa
  • 0.2% Proof Stress: 62 MPa
  • Tensile Strength: 96 MPa
  • Elongation: 46%

Stress-Rupture Properties of Extruded and Forged Bar, (8h/1080°C/cooling in air + 16h/700°C/cooling in air):

• 700°C
  • 100h: 556 MPa
  • 300h: 487 MPa
  • 1000h: 417 MPa
  • 3000h: 332 MPa
  • 10000h: 248 MPa
• 750°C
  • 100h: 386 MPa
  • 300h: 340 MPa
  • 1000h: 275 MPa
  • 3000h: 209 MPa
  • 10000h: 294 MPa
• 815°C
  • 100h: 248 MPa
  • 300h: 186 MPa
  • 1000h: 139 MPa
  • 3000h: 105 MPa
• 870°C
  • 100h: 133 MPa
  • 300h: 101 MPa
  • 1000h: 74 MPa

Stress-Rupture Properties of Cold-rolled Sheets (3min/1150°C/cooling in bath + 20min/1040°C/cooling in air + 4h/700°C/cooling in air):

• 700°C
  • 50h: 464 MPa
  • 100h: 428 MPa
  • 300h: 371 MPa
  • 1000h: 320 MPa
  • 3000h: 271 MPa
• 750°C
  • 50h: 349 MPa
  • 100h: 320 MPa
  • 300h: 275 MPa
  • 1000h: 221 MPa
  • 3000h: 170 MPa
• 800°C
  • 50h: 244 MPa
  • 100h: 218 MPa
  • 300h: 164 MPa
  • 1000h: 104 MPa
  • 3000h: 59 MPa
• 850°C
  • 50h: 163 MPa
  • 100h: 136 MPa
  • 300h: 95 MPa
  • 1000h: 54 MPa
  • 3000h: 29 MPa
• 900°C
  • 50h: 90 MPa
  • 100h: 74 MPa
  • 300h: 48 MPa
  • 1000h: 26 MPa

Creep-limit at 0.1% Elongation R_p0,1 of Extruded and Cold-drawn Forgings, (8h/1080°C/air-cool + 16h/700°C/air-cool):

• 600°C
  • 100h: 592 MPa
  • 300h: 538 MPa
  • 1000h: 481 MPa
  • 3000h: 427 MPa
  • 10000h: 368 MPa
• 650°C
  • 100h: 444 MPa
  • 300h: 397 MPa
  • 1000h: 346 MPa
  • 3000h: 300 MPa
  • 10000h: 249 MPa
• 700°C
  • 100h: 371 MPa
  • 300h: 322 MPa
  • 1000h: 277 MPa
  • 3000h: 221 MPa
  • 10000h: 167 MPa
• 750°C
  • 100h: 232 MPa
  • 300h: 186 MPa
  • 1000h: 138 MPa
  • 3000h: 98 MPa
  • 10000h: 65 MPa
• 815°C
  • 100h: 119 MPa
  • 300h: 85 MPa
  • 1000h: 57 MPa
  • 3000h: 39 MPa
  • 10000h: 28 MPa
• 870°C
  • 100h: 73 MPa
  • 300h: 50 MPa
  • 1000h: 29 MPa
  • 3000h: 22 MPa
  • 10000h: 16 MPa

Creep-limit at 0.1% Elongation R_p0,1 of Cold-rolled Sheets(3min/1150°C/air-cool in bath + 20min/1040°C/air-cool + 4h/700°C/air-cool):

• 700°C
  • 50h: 353 MPa
  • 100h: 320 MPa
  • 300h: 269 MPa
  • 1000h: 210 MPa
• 750°C
  • 50h: 241 MPa
  • 100h: 209 MPa
  • 300h: 155 MPa
  • 1000h: 99 MPa
• 800°C
  • 50h: 138 MPa
  • 100h: 113 MPa
  • 300h: 76 MPa
  • 1000h: 46 MPa
• 850°C
  • 50h: 74 MPa
  • 100h: 57 MPa
  • 300h: 37 MPa
  • 1000h: 22 MPa
• 900°C
  • 50h: 39 MPa
  • 100h: 29 MPa
  • 300h: 17 MPa

Room temperature Impact Values after heating for a given time(heat treatment 8h/1080°C/AC + 16h/700°C/AC):

• 700°C
  • 30h: 62-64 J
  • 100h: 52-58 J
  • 300h: 43-46 J
  • 1000h: 38-41 J
  • 3000h: 31-34 J
  • 10000h: 27-26 J
• 750°C
  • 30h: 50-57 J
  • 100h: 46-49 J
  • 300h: 46-43 J
  • 1000h: 37-38 J
  • 3000h: 27-30 J
  • 10000h: 29-30 J
• 800°C
  • 30h: 56-72 J
  • 100h: 53-65 J
  • 300h: 43-43 J
  • 1000h: 52-49 J
  • 3000h: 35-37 J
  • 10000h: 30-30 J
• 850°C
  • 30h: 57-58 J
  • 100h: 56-60 J
  • 300h: 52-49 J
  • 1000h: 48-50 J
  • 3000h: 37-41 J
  • 10000h: 29-29 J
• 900°C
  • 30h: 76-75 J
  • 100h: 64-66 J
  • 300h: 54 J
  • 1000h: 52-43 J
  • 3000h: 37-39 J
  • 10000h: 29-27 J

High Temperature Impact Values (8h/1080°C/AC + 16h/700°C/AC):

• 700°C
  • 0h: 62-71 J
  • 30h: 58-58 J
  • 100h: 53-52 J
  • 300h: 43-68 J
  • 1000h: 39-41 J
  • 3000h: 38-39 J
  • 10000h: 35-33 J
• 750°C
  • 0h: 65-62 J
  • 30h: 49-48 J
  • 100h: 49 J
  • 300h: 48-41 J
  • 1000h: 41-41 J
  • 3000h: 38-41 J
  • 10000h: 43-43 J
• 800°C
  • 0h: 64-57 J
  • 30h: 45-45 J
  • 100h: 41-42 J
  • 300h: 43-43 J
  • 1000h: 45-45 J
  • 3000h: 48-45 J
  • 10000h: 48-53 J
• 850°C
  • 0h: 60-54 J
  • 30h: 48-49 J
  • 100h: 49-49 J
  • 300h: 48-49 J
  • 1000h: 50-48 J
  • 3000h: 52-49 J
  • 10000h: 49-49 J
• 900°C
  • 0h: 66-71 J
  • 30h: 60-65 J
  • 100h: 60 J
  • 300h: 58-56 J
  • 1000h: 57-58 J
  • 3000h: 54-50 J
  • 10000h: 45-42 J

In both cases, the impact values were measured using a 10mm, 45°Charpy V-notch hammer.

Fatigue Properties under both Static and Dynamic loads, Extruded Rods. The test combined static loading with alternating high-frequency dynamic loading and determined the minimum load required to cause failure after 1000 hours of testing (equivalent to ~120,000,000 cycles). (8h/1080°C/AC + 16h/700°C/AC):

• 815°C
  • static load 0 MPa; dynamic load 172 MPa
  • static load 78 MPa; dynamic load 78 MPa
  • static load 82 MPa; dynamic load 41 MPa
  • static load 92 MPa; dynamic load 35 MPa
  • static load 85 MPa; dynamic load 21 MPa
  • static load 113 MPa; dynamic load 0 MPa
• 870°C
  • static load 0 MPa; dynamic load 107 MPa
  • static load 31 MPa; dynamic load 31 MPa
  • static load 42 MPa; dynamic load 21 MPa
  • static load 40 MPa; dynamic load 15 MPa
  • static load 50 MPa; dynamic load 12 MPa
  • static load 53 MPa; dynamic load 0 MPa

Rotating Bend Fatigue Properties of Extruded and Hot-rolled Rods, depending on the number of alternating loading cycles and temperature. (8h/1080°C/AC + 16h/700°C/AC):

• 815°C
  • 100h: 317 MPa
  • 300h: 274 MPa
  • 1000h: 232 MPa
• 870°C
  • 10h: 217 MPa
  • 300h: 189 MPa
  • 1000h: 158 MPa

Alternating Direct Stress Properties of Cold-Rolled Sheets for 100h of testing (equivalent to ~15 000 000 cycles). (3min/1150°C/FBC + 20min/1040°C/AC + 4h/700°C/AC):

• 20°C: 317 MPa
• 500°C: 271 MPa
• 700°C: 325 MPa
• 750°C: 286 MPa
• 800°C: 224 MPa

Corrosion Resistance

Heat resistance. Alloy 90 is heat resistant up to ~920°C, as confirmed by test results.

Weight loss after 100 hours of static oxidation in hot air:

• 800°C: 0.46 mg/cm³
• 900°C: 2.52 mg/cm³
• 950°C: 5.5 mg/cm³
• 1000°C: 10.4 mg/cm³
• 1100°C: 11.23 mg/cm³

Weight loss after 100 hours of intermittent oxidation in air with cooling to room temperature every 24 hours:

• 900°C: 3.02 mg/cm³
• 950°C: 8.12 mg/cm³
• 1000°C: 8.18 mg/cm³
• 1100°C: 17.7 mg/cm³

Results of the cyclic heating test (15 minutes in the furnace, 5 minutes in open air):

• 890°C: no spalling after 1000h of testing
• 910°C: no spalling after 1000h of testing
• 990°C: spalling after 250h
• 1010°C: spalling after 200h
• 1090°C: spalling after 100h
• 1110°C: spalling after 75h

Gas mixtures containing sulfur dioxide SO₂ - good resistance. Mass loss after 1000h of exposure to gas mixtures, depending on their composition and temperature:

• 3% SO₂ + argon
  • 600°C: 3.7 mg/cm³
  • 700°C: 18.0 mg/cm³
  • 800°C: 40.0 mg/cm³
• 3% SO₂ + air
  • 600°C: 4.5 mg/cm³
  • 700°C: 8.1 mg/cm³
  • 800°C: 1.4 mg/cm³
  • 900°C: 2.0 mg/cm³
• 3% SO₂ + 5% O₂ + argon
  • 600°C: 1.9 mg/cm³
  • 700°C: 4.2 mg/cm³
  • 800°C: 1.3 mg/cm³
  • 900°C: 3.7 mg/cm³

Heat Treatment

Hot Work: 1200-1050°C

Recommended procedure for heat treatment of rods and profiles after cold and/or hot working:

1. Annealing: 1150°C / 8h / air cooling
2. Precipitation hardening: 700°C / 16 h / air cooling

Recommended procedure for cold plastic working and heat treatment of sheets:

1. Annealing: 1150°C / 2-3 min / bath cooling
2. Cold working
3. (Welding)
4. Recrystallization annealing: 1040°C / 20 min / air cooling
5. Precipitation hardening: 750°C / 4 h / air cooling

Welding

Good weldability up to 5 mm thickness using TIG and MIG technologies. Cross-sections above 5 mm can be joined using electron beam welding, friction welding, inertial welding.

For the above-mentioned grades, we provide:

• Bars, wires, forgings according to BS HR2, HR 501, HR 502, HR 503; SAE AMS 5829, AECMA PrEn 2295, 2296, 2297, 2400, 2401, 2669, 2670
• Sheets, strips, and plates according to BS HR202, AECMA PrEn 2298
• Tubes according to BS HR402, AECMA PrEn 2299