Haynes 188 is a cobalt-based alloy which possesses a unique combination of properties. It has excellent high temperature strength and oxidation resistance to 2100°F (1150°C) combined with good post-aging ductility.
Alloy 188 has average room temperature tensile properties in the bright annealed condition of 137.2 ksi (946 MPa) ultimate strength, 67.3 ksi (464 MPa) yield strength and 53% elongation. At 1800°F (980°C) the alloy has ultimate and yield strengths of 35.2 ksi (243 MPa) and 19.0 ksi (131 MPa), respectively, with 59% elongation. Cryogenic temperatures do not significantly affect the ductility of alloy 188, but strength levels are increased markedly.
The excellent oxidation resistance of Haynes 188 results from minute additions of lanthanum, which modifies the protective oxide scale in such a manner that the oxide becomes extremely tenacious and retards diffusion when exposed to temperatures through 2100°F (1150°C).
Haynes 188 exhibits good ductility after prolonged exposure at temperatures of 1200, 1400, and 1600°F (650, 760 and 870°C) for 16,000 hours.
| ALLOY | SIZE | WEIGHT |
|---|---|---|
| CURRENT PLATE INVENTORY | ||
| Alloy 188 | 0.187 X 36.000 X 120.000 4.7498MM X 914.4 X 3048 | 6794 LBS 3082 KG |
| Alloy 188 | 0.250 X 29.375 X 4.125 6.35MM X 746.125 X 104.775 | 12 LBS 5 KG |
| Alloy 188 | 0.250 X 48.000 X 20.875 6.35MM X 1219.2 X 530.225 | 112 LBS 51 KG |
| Alloy 188 - DUE DATE: 02-20-26 | 0.250 X 48.000 X 120.000 6.35MM X 1219.2 X 3048 | 4755 LBS 2157 KG |
| Alloy 188 | 0.250 X 48.000 X 144.000 6.35MM X 1219.2 X 3657.6 | 1292 LBS 586 KG |
| Alloy 188 | 0.375 X 7.375 X 12.625 9.525MM X 187.325 X 320.675 | 23 LBS 10 KG |
| Alloy 188 | 0.375 X 48.000 X 191.500 9.525MM X 1219.2 X 4864.1 | 1247 LBS 566 KG |
| Alloy 188 | 0.375 X 48.000 X 200.000 9.525MM X 1219.2 X 5080 | 3967 LBS 1799 KG |
| Alloy 188 | 0.500 X 27.375 X 3.125 12.7MM X 695.325 X 79.375 | 24 LBS 11 KG |
| Alloy 188 | 0.500 X 48.000 X 200.000 12.7MM X 1219.2 X 5080 | 5800 LBS 2631 KG |
| Alloy 188 | 0.500 X 48.000 X 200.125 12.7MM X 1219.2 X 5083.175 | 3407 LBS 1545 KG |
| Alloy 188 | 0.750 X 39.625 X 2.000 19.05MM X 1006.475 X 50.8 | 186 LBS 84 KG |
| Alloy 188 | 0.750 X 48.000 X 168.000 19.05MM X 1219.2 X 4267.2 | 3642 LBS 1652 KG |
| Alloy 188 | 0.750 X 48.002 X 4.375 19.05MM X 1219.2508 X 111.125 | 57 LBS 26 KG |
| Alloy 188 - DUE DATE: 11-03-25 | 0.750 X 49.000 X 142.500 19.05MM X 1244.6 X 3619.5 | 4059 LBS 1841 KG |
| Alloy 188 | 1.000 X 49.000 X 142.500 25.4MM X 1244.6 X 3619.5 | 2540 LBS 1152 KG |
| Alloy 188 - DUE DATE: 12-05-25 | 1.000 X 49.000 X 147.000 25.4MM X 1244.6 X 3733.8 | 2342 LBS 1062 KG |
| Alloy 188 | 1.250 X 49.000 X 188.125 31.75MM X 1244.6 X 4778.375 | 4206 LBS 1908 KG |
| Alloy 188 | 1.500 X 4.375 X 6.500 38.1MM X 111.125 X 165.1 | 32 LBS 15 KG |
| Alloy 188 | 1.500 X 8.875 X 24.125 38.1MM X 225.425 X 612.775 | 837 LBS 380 KG |
| Alloy 188 | 1.500 X 15.000 X 9.250 38.1MM X 381 X 234.95 | 115 LBS 52 KG |
| Alloy 188 | 1.500 X 37.000 X 123.500 38.1MM X 939.8 X 3136.9 | 3969 LBS 1800 KG |
| Alloy 188 | 1.500 X 49.001 X 200.000 38.1MM X 1244.6254 X 5080 | 5185 LBS 2352 KG |
| Alloy 188 | 2.000 X X 50.8MM X 0 X 0 | 0 LBS 0 KG |
| Alloy 188 | 2.000 X 1.875 X 11.000 50.8MM X 47.625 X 279.4 | 355 LBS 161 KG |
| Alloy 188 | 2.000 X 49.125 X 130.000 50.8MM X 1247.775 X 3302 | 4779 LBS 2168 KG |
| ALLOY | SIZE | WEIGHT |
|---|---|---|
| CURRENT BAR INVENTORY | ||
| Alloy 188 | 0.385 DIA X 101-178RL 9.779MM DIA | 1037 LBS 470 KG |
| Alloy 188 | 0.385 DIA X 144"RL 9.779MM DIA | 93 LBS 42 KG |
| Alloy 188 | 0.510 DIA X 145-173RL+67.3 12.954MM DIA | 940 LBS 426 KG |
| Alloy 188 | 0.760 DIA X 130-205RL 19.304MM DIA | 3222 LBS 1461 KG |
| Alloy 188 | 0.760 DIA X 141-157RL+121 19.304MM DIA | 429 LBS 195 KG |
| Alloy 188 | 0.760 DIA X 81-185RL 19.304MM DIA | 2274 LBS 1031 KG |
| Alloy 188 | 0.760 DIA X 82-172RL 19.304MM DIA | 3544 LBS 1608 KG |
| Alloy 188 | 1.010 DIA X 105-178RL 25.654MM DIA | 3431 LBS 1556 KG |
| Alloy 188 | 1.010 DIA X 12-14 RL 25.654MM DIA | 11 LBS 5 KG |
| Alloy 188 | 1.010 DIA X 133-175RL 25.654MM DIA | 2087 LBS 947 KG |
| Alloy 188 | 1.010 DIA X 138-186RL 25.654MM DIA | 1979 LBS 898 KG |
| Alloy 188 | 1.010 DIA X 140-179RL 25.654MM DIA | 2773 LBS 1258 KG |
| Alloy 188 | 1.010 DIA X 141-172RL 25.654MM DIA | 2004 LBS 909 KG |
| Alloy 188 - DUE DATE: 12-20-25 | 1.010 DIA X 160 RL 25.654MM DIA | 3000 LBS 1361 KG |
| Alloy 188 | 1.010 DIA X 165-176RL+85 25.654MM DIA | 668 LBS 303 KG |
| Alloy 188 | 1.135 DIA X 125-170RL 28.829MM DIA | 1990 LBS 903 KG |
| Alloy 188 | 1.135 DIA X 150-173RL 28.829MM DIA | 779 LBS 353 KG |
| Alloy 188 | 1.197 DIA X 102-165" RL 30.4038MM DIA | 1720 LBS 780 KG |
| Alloy 188 | 1.197 DIA X 116-161RL 30.4038MM DIA | 1835 LBS 832 KG |
| Alloy 188 | 1.260 DIA X 112-159RL 32.004MM DIA | 3077 LBS 1396 KG |
| Alloy 188 | 1.260 DIA X 140-163"RL+122 32.004MM DIA | 2045 LBS 928 KG |
| Alloy 188 | 1.260 DIA X 97-160RL 32.004MM DIA | 3063 LBS 1389 KG |
| Alloy 188 | 1.385 DIA X 106-151RL 35.179MM DIA | 1900 LBS 862 KG |
| Alloy 188 | 1.385 DIA X 123-172RL 35.179MM DIA | 2008 LBS 911 KG |
| Alloy 188 | 1.510 DIA X 105-172RL 38.354MM DIA | 3805 LBS 1726 KG |
| Alloy 188 | 1.510 DIA X 133-159RL+52.5 38.354MM DIA | 1247 LBS 566 KG |
| Alloy 188 | 1.510 DIA X 133-170RL 38.354MM DIA | 3060 LBS 1388 KG |
| Alloy 188 | 1.760 DIA X 106.875 + 6.25 44.704MM DIA | 90 LBS 41 KG |
| Alloy 188 | 1.760 DIA X 126-166RL 44.704MM DIA | 3170 LBS 1438 KG |
| Alloy 188 | 1.760 DIA X 131-160RL+75 44.704MM DIA | 2867 LBS 1300 KG |
| Alloy 188 | 2.010 DIA X 100-133 RL 51.054MM DIA | 1968 LBS 893 KG |
| Alloy 188 | 2.010 DIA X 117-159 RL 51.054MM DIA | 3588 LBS 1627 KG |
| Alloy 188 | 2.010 DIA X 138-174RL 51.054MM DIA | 3534 LBS 1603 KG |
| Alloy 188 | 2.010 DIA X 144-156RL 51.054MM DIA | 1873 LBS 850 KG |
| Alloy 188 | 2.010 DIA X 148.5 + 33.125 51.054MM DIA | 187 LBS 85 KG |
| Alloy 188 | 2.010 DIA X 3.625 51.054MM DIA | 4 LBS 2 KG |
| Alloy 188 | 2.260 DIA X 106-168RL 57.404MM DIA | 2812 LBS 1276 KG |
| Alloy 188 | 2.260 DIA X 111-124" RL 57.404MM DIA | 2322 LBS 1053 KG |
| Alloy 188 | 2.260 DIA X 130+129+126+79 57.404MM DIA | 612 LBS 278 KG |
| Alloy 188 | 2.260 DIA X 92-193 RL 57.404MM DIA | 2386 LBS 1082 KG |
| Alloy 188 | 2.510 DIA X 100-130RL 63.754MM DIA | 3455 LBS 1567 KG |
| Alloy 188 | 2.510 DIA X 101-134 RL 63.754MM DIA | 1637 LBS 743 KG |
| Alloy 188 | 2.510 DIA X 104-146RL+180 63.754MM DIA | 3362 LBS 1525 KG |
| Alloy 188 | 2.510 DIA X 124-178RL 63.754MM DIA | 3292 LBS 1493 KG |
| Alloy 188 | 2.510 DIA X 140.5+194+69.9 63.754MM DIA | 651 LBS 295 KG |
| Alloy 188 | 2.515 DIA X 1.875 63.881MM DIA | 2 LBS 1 KG |
| Alloy 188 | 2.750 DIA X 138.375+35.375 69.85MM DIA | 343 LBS 156 KG |
| Alloy 188 | 2.760 DIA X 146-192 RL 70.104MM DIA | 3892 LBS 1765 KG |
| Alloy 188 | 2.760 DIA X 94-178RL 70.104MM DIA | 2067 LBS 938 KG |
| Alloy 188 | 3.020 DIA X 1.125 76.708MM DIA | 3 LBS 1 KG |
| Alloy 188 | 3.020 DIA X 100-145RL 76.708MM DIA | 2946 LBS 1336 KG |
| Alloy 188 | 3.020 DIA X 2.375 76.708MM DIA | 6 LBS 3 KG |
| Alloy 188 | 3.020 DIA X E33-142RL+91.2 76.708MM DIA | 833 LBS 378 KG |
| Alloy 188 | 3.520 DIA X 120.000+3.500 89.408MM DIA | 350 LBS 159 KG |
| Alloy 188 | 3.520 DIA X 135-143RL 89.408MM DIA | 2222 LBS 1008 KG |
| Alloy 188 | 3.520 DIA X 95-134RL 89.408MM DIA | 2372 LBS 1076 KG |
| Alloy 188 | 4.020 DIA X 1.875 102.108MM DIA | 9 LBS 4 KG |
| Alloy 188 | 4.020 DIA X 108-110RL 102.108MM DIA | 1361 LBS 617 KG |
| Alloy 188 | 4.020 DIA X 155-164RL 102.108MM DIA | 2682 LBS 1217 KG |
| Alloy 188 | 4.020 DIA X 8.750 102.108MM DIA | 37 LBS 17 KG |
| Alloy 188 | 4.020 DIA X 171.875 102.108MM DIA | 718 LBS 326 KG |
| Alloy 188 | 4.020 DIA X 81-105RL 102.108MM DIA | 1628 LBS 738 KG |
| Alloy 188 | 4.020 DIA X 91-123RL 102.108MM DIA | 3663 LBS 1662 KG |
| Alloy 188 | 4.645 DIA X 101-171RL 117.983MM DIA | 4257 LBS 1931 KG |
| Alloy 188 | 4.645 DIA X 109-185RL 117.983MM DIA | 3397 LBS 1541 KG |
| Alloy 188 | 4.645 DIA X 110-160" RL 117.983MM DIA | 3998 LBS 1813 KG |
| Alloy 188 | 4.645 DIA X 111-167RL 117.983MM DIA | 3279 LBS 1487 KG |
| Alloy 188 - DUE DATE: 11-18-25 | 4.645 DIA X 121 RL 117.983MM DIA | 3300 LBS 1497 KG |
| Alloy 188 | 4.645 DIA X 127-166RL 117.983MM DIA | 4245 LBS 1926 KG |
| Alloy 188 | 4.645 DIA X 138-182RL + 97 117.983MM DIA | 4762 LBS 2160 KG |
| Alloy 188 | 4.645 DIA X 145-159RL 117.983MM DIA | 4230 LBS 1919 KG |
| Alloy 188 | 4.645 DIA X 89-103RL+19.87 117.983MM DIA | 1725 LBS 782 KG |
| Alloy 188 | 6.625 DIA X 123.000 + 6.75 168.275MM DIA | 1484 LBS 673 KG |
| Alloy 188 | 6.625 DIA X 188.25+181.875 168.275MM DIA | 4239 LBS 1923 KG |
| Alloy 188 - DUE DATE: 11-25-25 | 6.625 DIA X 191 RL 168.275MM DIA | 4400 LBS 1996 KG |
| Alloy 188 | 6.645 DIA X 105.625+97+87 168.783MM DIA | 3302 LBS 1498 KG |
| Alloy 188 - DUE DATE: 11-20-25 | 6.645 DIA X 120-159 RL 168.783MM DIA | 6600 LBS 2994 KG |
| Alloy 188 - DUE DATE: 12-18-25 | 6.645 DIA X 120-160 RL 168.783MM DIA | 3500 LBS 1588 KG |
| Alloy 188 - DUE DATE: 11-15-25 | 6.645 DIA X 192 RL 168.783MM DIA | 4434 LBS 2011 KG |
| ALLOY | SIZE | WEIGHT |
|---|---|---|
| CURRENT SHEET INVENTORY | ||
| Alloy 188 | 0.008 X 8.000 X 9999.000 0.2032MM X 203.2 X 253974.6 | 323 LBS 147 KG |
| Alloy 188 | 0.008 X 8.001 X 9999.000 0.2032MM X 203.2254 X 253974.6 | 2314 LBS 1050 KG |
| Alloy 188 | 0.010 X 8.000 X 9999.000 0.254MM X 203.2 X 253974.6 | 5843 LBS 2650 KG |
| Alloy 188 | 0.012 X 7.875 X 9999.000 0.3048MM X 200.025 X 253974.6 | 197 LBS 89 KG |
| Alloy 188 | 0.012 X 8.000 X 9999.000 0.3048MM X 203.2 X 253974.6 | 1771 LBS 803 KG |
| Alloy 188 | 0.016 X 36.000 X 120.000 0.4064MM X 914.4 X 3048 | 4333 LBS 1965 KG |
| Alloy 188 | 0.020 X 36.000 X 120.000 0.508MM X 914.4 X 3048 | 5590 LBS 2536 KG |
| Alloy 188 | 0.025 X 36.000 X 120.000 0.635MM X 914.4 X 3048 | 5170 LBS 2345 KG |
| Alloy 188 | 0.032 X 36.000 X 34.125 0.8128MM X 914.4 X 866.775 | 13 LBS 6 KG |
| Alloy 188 | 0.032 X 36.000 X 120.000 0.8128MM X 914.4 X 3048 | 9669 LBS 4386 KG |
| Alloy 188 | 0.040 X 36.000 X 120.000 1.016MM X 914.4 X 3048 | 4026 LBS 1826 KG |
| Alloy 188 | 0.040 X 36.001 X 120.000 1.016MM X 914.4254 X 3048 | 2844 LBS 1290 KG |
| Alloy 188 | 0.040 X 36.002 X 120.000 1.016MM X 914.4508 X 3048 | 4383 LBS 1988 KG |
| Alloy 188 | 0.040 X 36.003 X 120.000 1.016MM X 914.4762 X 3048 | 4218 LBS 1913 KG |
| Alloy 188 | 0.040 X 36.004 X 120.000 1.016MM X 914.5016 X 3048 | 5112 LBS 2319 KG |
| Alloy 188 | 0.050 X 36.000 X 120.000 1.27MM X 914.4 X 3048 | 6684 LBS 3032 KG |
| Alloy 188 | 0.057 X 36.000 X 43.750 1.4478MM X 914.4 X 1111.25 | 29 LBS 13 KG |
| Alloy 188 | 0.057 X 36.000 X 120.000 1.4478MM X 914.4 X 3048 | 4533 LBS 2056 KG |
| Alloy 188 | 0.063 X 36.000 X 120.000 1.6002MM X 914.4 X 3048 | 8740 LBS 3964 KG |
| Alloy 188 | 0.063 X 36.001 X 120.000 1.6002MM X 914.4254 X 3048 | 5549 LBS 2517 KG |
| Alloy 188 | 0.072 X 36.000 X 120.000 1.8288MM X 914.4 X 3048 | 4546 LBS 2062 KG |
| Alloy 188 | 0.080 X 4.700 X 8.100 2.032MM X 119.38 X 205.74 | 1 LBS 0 KG |
| Alloy 188 | 0.080 X 36.000 X 120.000 2.032MM X 914.4 X 3048 | 3818 LBS 1732 KG |
| Alloy 188 | 0.093 X 36.000 X 31.125 2.3622MM X 914.4 X 790.575 | 35 LBS 16 KG |
| Alloy 188 | 0.093 X 36.000 X 120.000 2.3622MM X 914.4 X 3048 | 4922 LBS 2233 KG |
| Alloy 188 | 0.093 X 36.001 X 120.000 2.3622MM X 914.4254 X 3048 | 1335 LBS 606 KG |
| Alloy 188 | 0.100 X 36.000 X 120.000 2.54MM X 914.4 X 3048 | 4934 LBS 2238 KG |
| Alloy 188 | 0.100 X 36.000 X 120.010 2.54MM X 914.4 X 3048.254 | 1608 LBS 729 KG |
| Alloy 188 | 0.100 X 36.001 X 120.010 2.54MM X 914.4254 X 3048.254 | 715 LBS 324 KG |
| Alloy 188 | 0.125 X 36.000 X 11.875 3.175MM X 914.4 X 301.625 | 18 LBS 8 KG |
| Alloy 188 | 0.125 X 36.000 X 120.000 3.175MM X 914.4 X 3048 | 4020 LBS 1823 KG |
| Alloy 188 | 0.159 X 36.000 X 57.000 4.0386MM X 914.4 X 1447.8 | 106 LBS 48 KG |
| Alloy 188 | 0.159 X 36.000 X 120.000 4.0386MM X 914.4 X 3048 | 3313 LBS 1503 KG |