HAYNES® HR-224® alloy
Principal Features
Haynes International, Inc. is pleased to announce the development of HAYNES® HR-224® alloy, a new alloy with excellent oxidation resistance and improved fabricability and weldability compared to HAYNES® 214® alloy. This Ni–27.5Fe–20Cr–3.8Al alloy achieves superior oxidation resistance through the formation of a tightly adherent alumina protective scale. It exhibits excellent ductility and formability characteristics, with weldability on par with nickel-iron-chromium alloys of substantially lower aluminum contents. Potential uses include applications in heat recuperators, automotive catalytic converters and heat shields, strand annealing furnace tubulars, and other severely oxidizing environments.
*Please contact our technical support team if you have technical questions about this alloy.
Nominal Composition
Weight % | |
Nickel | 47 Balance |
Cobalt | 2 max. |
Iron | 27.5 |
Chromium | 20 |
Molybdenum | 0.5 max. |
Tungsten | 0.5 max. |
Manganese | 0.5 max. |
Silicon | 0.3 |
Columbium | 0.15 max. |
Aluminum | 3.8 |
Titanium | 0.3 |
Carbon | 0.05 |
Boron | 0.004 max. |
Zirconium | 0.025 max. |
Oxidation Resistance
Comparative Oxidation Resistance in Flowing Air
Material | 1600°F (871°C) | 1800°F (982°C) | ||||||
Average Metal Loss | Average Metal Affected | Average Metal Loss | Average Metal Affected | |||||
Mils | μm | Mils | μm | Mils | μm | Mils | μm | |
HR-224® | 0 | 0 | 0.2 | 5 | 0 | 0 | 0.3 | 8 |
214® | 0 | 0 | 0.3 | 8 | 0 | 0 | 0.5 | 13 |
230® | 0 | 0 | 0.9 | 23 | 0.2 | 5 | 1.6 | 41 |
625 | 0.1 | 3 | 0.6 | 15 | 0.2 | 5 | 1.9 | 48 |
X | 0.1 | 3 | 1 | 25 | 0.3 | 8 | 1.9 | 48 |
HR-120® | 0.1 | 3 | 1.1 | 28 | 0.3 | 8 | 2.0 | 51 |
601 | - | - | - | - | 0.4 | 10 | 1.7 | 43 |
800HT | 0.1 | 3 | 1 | 25 | 0.5 | 13 | 4.1 | 104 |
347 SS | 0.3 | 8 | 0.7 | 18 | - | - | - | - |
253 MA | 0.2 | 5 | 0.9 | 23 | 1.3 | 33 | 3.0 | 76 |
Flowing air at a velocity of 7.0 ft/min (213.4 cm/min) past the samples. Samples cycled to room temperature once per week.
Comparative Long-Term Oxidation Resistance
Material | 1800°F (982°C) | |||
Average Metal Loss | Average Metal Affected | |||
Mils | μm | Mils | μm | |
HR-224® | 0.1 | 3 | 0.1 | 3 |
214® | 0.1 | 3 | 0.5 | 13 |
230® | 0.1 | 3 | 2.7 | 69 |
X | 0.2 | 5 | 2.8 | 71 |
HR-120® | 0.5 | 13 | 3.3 | 84 |
625 | 2.6 | 66 | 8.6 | 218 |
Alloys exposed for 360 days (8,640 h) in flowing air, cycled once per month.
Comparative Oxidation Resistance in Water Vapor
Material | 1400°F (760°C) | 1600°F (871°C) | ||||||
Average Metal Loss | Average Metal Affected | Average Metal Loss | Average Metal Affected | |||||
Mils | μm | Mils | μm | Mils | μm | Mils | μm | |
HR-224® | 0.05 | 1 | 0.25 | 7 | 0.06 | 2 | 0.26 | 7 |
214® | 0.02 | 1 | 0.22 | 7 | 0.05 | 1 | 0.35 | 9 |
230® | 0.09 | 2 | 1.19 | 30 | 0.21 | 5 | 1.91 | 49 |
HR-120® | 0.12 | 3 | 0.72 | 18 | 0.26 | 7 | 2.06 | 52 |
Amount of metal affected for high‐temperature sheet (0.125”) alloys exposed for 8640h (cycled monthly) in air + 10%H2O
Comparative Cyclic Oxidation
Material | 1400°F (760°C) | 1600°F (871°C) | 1800°F (982°C) | 2000°F (1093°C) | ||||||||||||
Average Metal Loss | Average Metal Affected | Average Metal Loss | Average Metal Affected | Average Metal Loss | Average Metal Affected | Average Metal Loss | Average Metal Affected | |||||||||
Mils | μm | Mils | μm | Mils | μm | Mils | μm | Mils | μm | Mils | μm | Mils | μm | Mils | μm | |
HR-224® | < 0.1 | 0.6 | 0.1 | 1.9 | 0.1 | 3 | 0.3 | 8 | 0.1 | 3 | 0.3 | 8 | 0.2 | 5 | 0.8 | 20 |
214® | < 0.1 | 0.3 | 0.1 | 1.6 | 0.1 | 3 | 0.1 | 3 | 0.1 | 3 | 0.5 | 13 | 0.1 | 6 | 0.4 | 10 |
230® | < 0.1 | 0.8 | 0.1 | 2.7 | 0.1 | 3 | 0.7 | 18 | 0.2 | 5 | 1.1 | 28 | 0.9 | 23 | 4.1 | 104 |
X | - | - | - | - | 0.2 | 5 | 1.0 | 25 | 0.3 | 8 | 1.6 | 41 | 10 | 254 | 12.1 | 307 |
601 | - | - | - | - | - | - | - | - | 0.5 | 13 | 1.9 | 48 | - | - | - | - |
625 | - | - | - | - | 0.1 | 3 | 0.5 | 13 | 0.4 | 10 | 2.0 | 51 | - | - | - | - |
HR-120® | < 0.1 | 1.2 | 0.2 | 6.0 | 0.2 | 5 | 0.9 | 23 | 0.4 | 10 | 2.0 | 51 | 18.5 | 470 | 20.6 | 523 |
600 | - | - | - | - | 0.1 | 3 | 0.8 | 20 | 0.5 | 13 | 2.2 | 56 | - | - | - | - |
800HT | - | - | - | - | 0.3 | 8 | 1.3 | 33 | 8 | 203 | 9.8 | 249 | 30.8 | 782 | 32.2 | 818 |
Amount of metal affected for alloys exposed to flowing air for 1000-h, cycled 1x/10h
Schematic Representation of Metallographic Technique used for Evaluating Oxidation
Carburization Resistance
Laboratory Carburization Testing in Ar-5%H2-2%C3H6 at 1600°F (871°C) for 124 hours
Alloy | Carbon Absorption | Total Depth of Attack | |
(mg/cm2) |
mil | mm | |
214® | 0.4 | 0 | 0 |
HR-160® | 0.9 | 10.3 | 0.26 |
HR-224® | 1.4 | 5.8 | 0.15 |
625 | 2.6 | 10 | 0.25 |
X | 3.6 | 11.2 | 0.28 |
HR-120® | 4 | 14.3 | 0.36 |
Note: Preliminary data from a single test.
Laboratory Carburization Testing in Ar-5%H2-2%C3H6 at 2000°F (1093°C) for 24 hours
Alloy | Carbon Absorption | Total Depth of Attack | |
(mg/cm2) |
mil | mm | |
214® | 0.2 | 0 | 0 |
HR-224® | 3.7 | 35.7 | 0.9 |
HR-160® | 7.1 | 45.6 | 1.2 |
625 | 8.9 | > 61.3 | > 1.6 |
X | 11.7 | 41.9 | 1.1 |
HR-120® | 13.6 | > 61.9 | > 1.6 |
Note: Preliminary data from a single test. 625 and HR-120® exhibited through-thickness carburization attack.
Thermal Stability
Room Temperature Properties after Exposure
Exposure Temperature | Time | 0.2% Offset Yield Strength | Ultimate Tensile Strength | % Elongation | |||
°F | °C | h | ksi | MPa | ksi | MPa | |
As-Annealed | As-Annealed | 0 | 46 | 318 | 108 | 745 | 50 |
1200 | 649 | 4000 | 102 | 703 | 153 | 1055 | 21 |
8000 | 103 | 709 | 148 | 1020 | 12 | ||
16000 | 102 | 703 | 144 | 992 | 10 | ||
1400 | 760 | 4000 | 61 | 420 | 130 | 896 | 25 |
8000 | 58 | 402 | 127 | 879 | 20 | ||
16000 | 55 | 379 | 123 | 848 | 21 | ||
1600 | 871 | 4000 | 39 | 269 | 104 | 717 | 39 |
8000 | 40 | 276 | 104 | 717 | 40 | ||
16000 | 38 | 262 | 104 | 717 | 41 | ||
1800 | 982 | 4000 | 44 | 303 | 100 | 690 | 46 |
8000 | 44 | 303 | 93 | 639 | 43 | ||
16000 | 42 | 290 | 94 | 648 | 50 |
Creep-Rupture Strength
Temperature | Creep | Approximate Initial Stress to Produce Specified Creep in | ||||||||
10 hours | 100 hours | 1000 hours | 10,000 hours | |||||||
°F | °C | % | ksi | MPa | ksi | MPa | ksi | MPa | ksi | MPa |
1200 | 649 | 0.1 | 36.9 | 254 | 26.8 | 185 | 19.6 | 135 | 14.5 | 100 |
1.0 | 59.7 | 412 | 39.1 | 270 | 26.1 | 180 | 17.7 | 122 | ||
R | 82.8 | 571 | 18.3 | 126 | 29.1 | 201 | 18.0 | 124 | ||
1300 | 704 | 0.1 | 19.1 | 132 | 13.9 | 96 | 10.2 | 70 | 7.6 | 52 |
1.0 | 29.0 | 200 | 19.2 | 132 | 12.9 | 89 | 8.9 | 61 | ||
R | 43.4 | 299 | 25.5 | 176 | 15.5 | 107 | 9.7 | 67 | ||
1400 | 760 | 0.1 | 10.3 | 71 | 7.5 | 52 | 5.6 | 39 | 4.2 | 29 |
1.0 | 14.9 | 103 | 9.9 | 68 | 6.8 | 47 | 4.8 | 33 | ||
R | 23.7 | 163 | 14.1 | 97 | 8.7 | 60 | 5.5 | 38 | ||
1500 | 816 | 0.1 | 5.8 | 40 | 4.3 | 30 | 3.2 | 22 | 2.4 | 17 |
1.0 | 8.1 | 56 | 5.5 | 38 | 3.8 | 26 | 2.7 | 19 | ||
R | 13.5 | 93 | 8.1 | 56 | 5.1 | 35 | 3.3 | 23 | ||
1600 | 871 | 0.1 | 3.4 | 23 | 2.5 | 17 | 1.9 | 13 | 1.5 | 10 |
1.0 | 4.6 | 32 | 3.2 | 22 | 2.3 | 16 | 1.7 | 12 | ||
R | 8.0 | 55 | 4.9 | 34 | 3.2 | 22 | 2.1 | 14 | ||
1700 | 927 | 0.1 | 2.1 | 14 | 1.6 | 11 | 1.2 | 8 | 0.9 | 6 |
1.0 | 2.8 | 19 | 2.0 | 14 | 1.4 | 10 | 1.1 | 8 | ||
R | 5.0 | 34 | 3.1 | 21 | 2.1 | 14 | 1.4 | 10 | ||
1800 | 982 | 0.1 | 1.3 | 9 | 1.0 | 7 | 0.8 | 6 | 0.6 | 4 |
1.0 | 1.8 | 12 | 1.3 | 9 | 1.0 | 7 | 0.8 | 6 | ||
R | 3.2 | 22 | 2.1 | 14 | 1.4 | 10 | 1.0 | 7 | ||
1900 | 1038 | 0.1 | 0.9 | 6 | 0.7 | 5 | 0.5 | 3 | 0.4 | 3 |
1.0 | 1.2 | 8 | 0.9 | 6 | 0.7 | 5 | 0.6 | 4 | ||
R | 2.2 | 15 | 1.4 | 10 | 1.0 | 7 | 0.8 | 6 | ||
2000 | 1093 | 0.1 | 0.6 | 4 | 0.5 | 3 | 0.4 | 3 | 0.3 | 2 |
1.0 | 0.8 | 6 | 0.7 | 5 | 0.5 | 3 | 0.4 | 3 | ||
R | 1.5 | 10 | 1.1 | 8 | 0.8 | 6 | 0.6 | 4 |
R = Rupture
Resistance to Strain Age Cracking
The Controlled Heating-Rate Tensile (CHRT) test is an excellent measure of the resistance of gamma-prime forming superalloys to strain-age cracking. Samples of thickness 0.063” (1.6 mm), originally in the solution annealed condition, are heated to the test temperature at a rate of 25-30°F (14-17°C) per minute, this being representative of a typical post-weld heat treatment. In this case, tests were performed at 1450°F (788°C). The susceptibility to strain-age cracking is related to the minimum tensile elongation observed within that temperature range (the higher the minimum elongation, the greater is the resistance to strain-age cracking).
HAYNES® HR-224® Strain-Age Cracking Resistance
Alloy | CHRT Elongation (%)* |
HAYNES® HR-224® | 16** |
HAYNES® 214® | 12 |
HAYNES®282® | 16 |
HAYNES® 718 | 15 |
HAYNES® R-41 | 7 |
*Average of three tests.
**Average of two heats
Controlled Heating Rate Test – 100°F/sec to 1100°F – 30°F/minute to 1450°F – Hold 1450°F and pull to failure at 0.0625 inches/minute
Metzler, D.A. 2008. A Gleeble®-based Method for Ranking the Strain-Age Cracking Susceptibility of Ni-Based Superalloys, Welding Journal 87(10): 249-s to 256-s.
Physical Properties
Physical Property | British Units | Metric Units | ||
Density | RT |
0.280 lb/in3 |
RT |
7.72 g/cm3 |
Melting Temperature | 2450-2510°F | - | 1340-1380°C | - |
Electrical Resistivity | RT | 48.6 µohm-in | RT | 123.5 µohm-cm |
200°F | 49.0 µohm-in | 100°C | 125.2 µohm-cm | |
400°F | 50.2 µohm-in | 200°C | 127.5 µohm-cm | |
600°F | 51.1 µohm-in | 300°C | 130.0 µohm-cm | |
800°F | 52.0 µohm-in | 400°C | 131.7 µohm-cm | |
1000°F | 52.6 µohm-in | 500°C | 133.5 µohm-cm | |
1200°F | 52.8 µohm-in | 600°C | 134.0 µohm-cm | |
1400°F | 52.9 µohm-in | 700°C | 134.2 µohm-cm | |
1600°F | 53.0 µohm-in | 800°C | 134.5 µohm-cm | |
1700°F | 53.0 µohm-in | 900°C | 134.4 µohm-cm | |
- | - | 1000°C | 135.4 µohm-cm | |
Thermal Diffusivity | RT |
4.3 x 10-3in2/sec |
RT |
27.5 x 10-3cm2/s |
200°F |
4.5 x 10-3in2/sec |
100°C |
29.5 x 10-3cm2/s |
|
400°F |
5.0 x 10-3in2/sec |
200°C |
32.1 x 10-3cm2/s |
|
600°F |
5.4 x 10-3in2/sec |
300°C |
34.5 x 10-3cm2/s |
|
800°F |
5.8 x 10-3in2/sec |
400°C |
37.2 x 10-3cm2/s |
|
1000°F |
6.3 x 10-3in2/sec |
500°C |
39.4 x 10-3cm2/s |
|
1200°F |
6.7 x 10-3in2/sec |
600°C |
42.0 x 10-3cm2/s |
|
1400°F |
7.0 x 10-3in2/sec |
700°C |
44.7 x 10-3cm2/s |
|
1600°F |
7.0 x 10-3in2/sec |
800°C |
44.9 x 10-3cm2/s |
|
1700°F |
7.1 x 10-3in2/sec |
900°C |
45.0 x 10-3cm2/s |
|
- | - | 1000°C |
47.4 x 10-3cm2/s |
|
Thermal Conductivity | RT |
69 Btu-in/ft2-hr-°F |
RT | 10.0 W/m-°C |
200°F |
74 Btu-in/ft2-hr-°F |
100°C | 11.2 W/m-°C | |
400°F |
89 Btu-in/ft2-hr-°F |
200°C | 12.7 W/m-°C | |
600°F |
100 Btu-in/ft2-hr-°F |
300°C | 14.2 W/m-°C | |
800°F |
112 Btu-in/ft2-hr-°F |
400°C | 15.7 W/m-°C | |
1000°F |
123 Btu-in/ft2-hr-°F |
500°C | 17.1 W/m-°C | |
1200°F |
135 Btu-in/ft2-hr-°F |
600°C | 18.7 W/m-°C | |
1400°F |
142 Btu-in/ft2-hr-°F |
700°C | 20.3 W/m-°C | |
1600°F |
149 Btu-in/ft2-hr-°F |
800°C | 20.7 W/m-°C | |
1700°F |
149 Btu-in/ft2-hr-°F |
900°C | 21.1 W/m-°C | |
- | - | 1000°C | 22.6 W/m-°C | |
Specific Heat | RT | 0.112 Btu/lb-°F | RT | 471 J/kg·°C |
200°F | 0.117 Btu/lb-°F | 100°C | 492 J/kg·°C | |
400°F | 0.123 Btu/lb-°F | 200°C | 514 J/kg·°C | |
600°F | 0.128 Btu/lb-°F | 300°C | 532 J/kg·°C | |
800°F | 0.132 Btu/lb-°F | 400°C | 548 J/kg·°C | |
1000°F | 0.136 Btu/lb-°F | 500°C | 564 J/kg·°C | |
1200°F | 0.139 Btu/lb-°F | 600°C | 577 J/kg·°C | |
1400°F | 0.142 Btu/lb-°F | 700°C | 588 J/kg·°C | |
1600°F | 0.145 Btu/lb-°F | 800°C | 600 J/kg·°C | |
1700°F | 0.146 Btu/lb-°F | 900°C | 608 J/kg·°C | |
- | - | 1000°C | 616 J/kg·°C | |
Mean Coefficient of Thermal Expansion | 70-200°F | 7.8 µin/in -°F | 25-100°C |
14.0 x 10-6m/m·°C |
70-400°F | 8.1 µin/in -°F | 25-200°C |
14.5 x 10-6m/m·°C |
|
70-600°F | 8.2 µin/in -°F | 25-300°C |
14.8 x 10-6m/m·°C |
|
70-800°F | 8.3 µin/in -°F | 25-400°C |
14.9 x 10-6m/m·°C |
|
70-1000°F | 8.3 µin/in -°F | 25-500°C |
14.9 x 10-6m/m·°C |
|
70-1200°F | 8.3 µin/in -°F | 25-600°C |
14.8 x 10-6m/m·°C |
|
70-1400°F | 8.9 µin/in -°F | 25-700°C |
15.3 x 10-6m/m·°C |
|
70-1600°F | 9.4 µin/in -°F | 25-800°C |
16.5 x 10-6m/m·°C |
|
70-1700°F | 9.7 µin/in -°F | 25-900°C |
17.2 x 10-6m/m·°C |
|
- | - | 25-1000°C |
18.2 x 10-6m/m·°C |
|
Dynamic Modulus of Elasticity | RT |
28.5 x 106psi |
RT | 197 GPa |
200°F |
27.5 x 106psi |
100°C | 191 GPa | |
400°F |
27.0 x 106psi |
200°C | 186 GPa | |
600°F |
26.2 x 106psi |
300°C | 181 GPa | |
800°F |
25.3 x 106psi |
400°C | 176 GPa | |
1000°F |
24.5 x 106psi |
500°C | 170 GPa | |
1200°F |
23.5 x 106psi |
600°C | 164 GPa | |
1400°F |
22.0 x 106psi |
700°C | 158 GPa | |
1600°F |
21.3 x 106psi |
800°C | 152 GPa | |
1800°F |
20.2 x 106psi |
900°C | 146 GPa | |
- | - | 1000°C | 139 GPa |
Tensile Properties
HAYNES® HR-224® Tensile Properties – Sheet
Test Temperature | Yield Strength 0.2% Offset | Ultimate Tensile Strength | Elongation | |||
°F | °C | ksi | MPa | ksi | MPa | % |
RT | RT | 47.6 | 328 | 106.1 | 732 | 47 |
1000 | 538 | 42.7 | 295 | 95.3 | 657 | 57 |
1200 | 649 | 56.2 | 387 | 84.3 | 581 | 16 |
1400 | 760 | 57.9 | 399 | 68.5 | 472 | 14 |
1600 | 871 | 14.3 | 99 | 18.3 | 126 | 102 |
1800 | 982 | 6.9 | 48 | 9.2 | 64 | 105 |
HAYNES® HR-224® Tensile Properties – Plate
Test Temperature | Yield Strength 0.2% Offset | Ultimate Tensile Strength | Elongation | |||
°F | °C | ksi | MPa | ksi | MPa | % |
RT | RT | 45.9 | 316 | 105.6 | 728 | 49 |
1000 | 538 | 42.2 | 291 | 93.6 | 645 | 57 |
1200 | 649 | 55.2 | 381 | 78.6 | 542 | 14 |
1400 | 760 | 59.5 | 410 | 69.6 | 480 | 9 |
1600 | 871 | 15.6 | 108 | 21.7 | 150 | 105 |
1800 | 982 | 5.8 | 40 | 9.5 | 66 | 125 |
HAYNES® HR-224® Tensile Properties – Bar
Test Temperature | Yield Strength 0.2% Offset | Ultimate Tensile Strength | Elongation | Reduction of Area | |||
°F | °C | ksi | MPa | ksi | MPa | % | % |
RT | RT | 45.8 | 316 | 106.5 | 734 | 48 | 72 |
1000 | 538 | 43.0 | 296 | 93.4 | 644 | 53 | 61 |
1200 | 649 | 54.8 | 378 | 74.5 | 514 | 13 | 22 |
1400 | 760 | 57.5 | 396 | 69.6 | 480 | 11 | 12 |
1600 | 871 | 12.9 | 89 | 19.5 | 135 | 106 | 93 |
1800 | 982 | 6.3 | 43 | 9.8 | 67 | 101 | 95 |
Annealing Response After Cold Forming
Effect of Cold Reduction on Room Temperature Tensile Properties*
Percentage Cold Reduction | Subsequent Anneal Temperature | Ultimate Tensile Strength | 0.2% Offset Yield Strength | Elongation | Hardness | ||
% | - | ksi | MPa | ksi | MPa | % | Rb |
0 | - | 107.0 | 738 | 51.0 | 352 | 47 | 87 |
10 | 1900°F (1038°C) for 5 min | 100.7 | 694 | 51.9 | 358 | 45.6 | 86 |
20 | 20 | 103.9 | 716 | 58.3 | 402 | 43.1 | |
30 | 30 | 106.1 | 732 | 55.5 | 383 | 41.2 | |
40 | 40 | 105.2 | 725 | 45.4 | 313 | 45.4 | |
50 | 50 | 110.2 | 760 | 48.6 | 335 | 45.0 | |
10 | 2000°F (1093°C) for 5 min | 97.3 | 671 | 48.2 | 332 | 48.5 | 90 |
20 | 98.4 | 678 | 51.0 | 352 | 47.5 | 89 | |
30 | 100.9 | 696 | 41.7 | 288 | 47.8 | 88 | |
40 | 103.6 | 714 | 42.8 | 295 | 47.1 | 86 | |
50 | 107.4 | 741 | 46.2 | 319 | 44.2 | 91 |
*Based upon rolling reductions taken upon 0.120-inch (3.0mm) thick mill annealed sheet
Heat Treatment
HAYNES® HR-224® alloy is furnished in the solution heat-treated condition, unless otherwise specified. The alloy is normally final solution heat-treated at 2025 to 2075°F (1107 to 1135°C) for a time commensurate with section thickness and rapidly cooled or water-quenched for optimal properties.
Disclaimer
Haynes International makes all reasonable efforts to ensure the accuracy and correctness of the data displayed on this site but makes no representations or warranties as to the data’s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. Alloy properties disclosed here are based on work conducted principally by Haynes International, Inc. and occasionally supplemented by information from the open literature and, as such, are indicative only of the results of such tests and should not be considered guaranteed maximums or minimums. It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.
For specific concentrations of elements present in a particular product and a discussion of the potential health affects thereof, refer to the Safety Data Sheets supplied by Haynes International, Inc. All trademarks are owned by Haynes International, Inc., unless otherwise indicated.
Alloy Brochure