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HIGH-TEMPERATURE ALLOY PROPERTIES

In the material selection process, many factors need to be considered including the temperature and environment. High temperature properties, although very useful in design, can also be key to selecting the most cost effective alloy.

Nominal Chemistry

Alloy UNS Cr Ni Mo Si Mn N C Ce Fe Other
410 S41000 12.2 - - 0.3 0.4 - 0.14 - 87 -
446 S44600 25 - - 0.5 0.7 0.1 0.05 - 73 -
304L S30403 18.3 9 - 0.5 1.7 0.08 0.02 - 70 -
316L S31603 16.4 10.2 2.1 0.5 1.6 0.05 0.02 - 69 -
321 S32100 17.3 9.3 - 0.7 1.8 - 0.04 - 70 0.4 Ti
321H S32109 17.3 9.3 - 0.7 1.8 - 0.05 - 70 0.4 Ti
347, 347H S34700 17 9.5 - 0.7 1.5 - 0.04 - 70 0.5 Cb
RA 253 MA® S30815 21 11 - 1.7 0.6 0.17 0.08 0.04 65 -
309 S30908 23 13 - 0.8 1.6 - 0.05 - 62 -
RA 602 CA® N06025 25 63 - - - - 0.2 - 9 0.1 Y, 0.08 Zr, 2.2 Al
310 S31008 25 20 - 0.5 1.6 - 0.05 - 52 -
800H/AT N08811 21 31 - 0.4 0.9 - 0.06 - 45 0.6 Ti, 0.4 Al
RA330® N08330 19 35 - 1.2 1.5 - 0.05 - 43 -
RA333® N06333 25 45 3 1 1.5 - 0.05 - 18 3 W, 3 Co
625 N06625 21.5 61 9 0.1 0.1 - 0.05 - 4 3.6 Cb
601 N06601 22.5 61.5 - 0.2 0.3 - 0.05 - 14 1.4 Al
718 N07718 19 52 3 0.1 0.1 - 0.04 - 18 5 Cb, 0.9 Ti, 0.5 Al
600 N06600 15.5 76 - 0.2 - - - - 8 0.2 Ti, 0.2 Al
Alloy X N06002 22 47 9 - - - - - 18 0.15 Ti, 0.5 Al, 0.6 W, 1.7 Co

Tensile Strength

Average Short-Time Ultimate Tensile Strength, ksi

Alloy Temperature, °F
RT 200 400 600 800 1000 1200 1400 1600 1800 1900 2000 2100 2200
446 68 70.7 69.3 80 77 52.7 15 5 - - - - - -
304L 79.2 68.1 65.4 58.6 57.7 52.3 42 28.5 - - - - - -
316L 78.9 69.4 63.9 63.1 62.3 56.8 46.5 32.3 - - - - - -
321 84 72.8 62 62 62 59.5 45.5 27.5 - - - - - -
321H 75.5 67 62.5 62 62 59 45.5 27 - - - - - -
347, 347H 87 75.7 65.2 62.6 61.8 60.9 53.9 37.4 - - - - - -
RA 253 MA® 104 90 83.5 82 79 74 63 45 22 11.5 9.5 9.4 7.5 3.7
309 90 - - - - - 52 - 18 8.5 - - - -
RA 602 CA® 105 - - - 95.4 93.4 84 54.4 32.8 17.1 13.6 13 10.2 5.8
310 82.6 78.1 72.5 72.2 71.8 67.8 54.1 35.1 19.1 10.4 - - - -
RA330® 86.6 79.2 75.3 74.4 74.2 71 56.7 35.9 21.1 10.4 - - - 3.2
RA333® 107 100.2 96.1 92.5 89.9 85.4 73.6 53.9 27.5 15.7 - 7.4 6.6 4.0
625 144 - 134 132 131.5 130 119 78 40 17 - - - -
601 100 - - - - 90 60 34 18 - - - - -
718 210 204 198 195 191 185 168 110 - - - - - -
600 93 - - - - 84 65 27.5 15 7.5 - - - -
Alloy X 111 - - - - 89 83 67 45 -   - - -

Yield Strength

Average Short-Time 0.2% Offset Yield Strength, ksi

Alloy Temperature, °F
RT 200 400 600 800 1000 1200 1400 1600 1800 1900 2000 2100 2200
446 49.7 45 40.7 39.7 45 42.3 12 4.0 - - - - - -
304L 33.8 28.7 23.6 21 19.6 17.9 15.2 - - - - - - -
316L 33.7 28.6 23.6 20.6 18.5 16.8 14.1 - - - - - - -
321 38 - 20.5 18 17 16.5 16 14 - - - - - -
347, 347H 38.2 35.1 30.6 27.5 26 25.6 24.8 20.6 - - - - - -
RA 253 MA® 50.8 39.5 32 29 28 25 24 22 14 7.0 5.5 4.0 3.0 2.0
309 42 - 35 - 30 24 22 20 18.0 8.5 - - - -
RA 602 CA® 50.5 - - - 39.2 38.3 37.7 36.5 28.7 15.2 12.2 11.6 9.0 5.0
310 35.1 32.5 28.3 26.3 24.3 20.8 20.7 19.3 12.2 6.4 - - - -
RA330® 37.2 35.6 31.6 29.6 27.8 25 22 20.7 15.4 8.5 - - - -
RA333® 47 41.6 37 32.5 31.5 30.8 30.7 28.9 23.9 12.1 - - - 2
625 84 - 66 63 61 60.5 60 58.5 39.0 17.0 - 6.5 5.0 3.5
601 54 - - - - 48 41 26 15 - - - - -
718 175 170 163 159 156 155 149 110 - - - - - -
600 37 - - - - 28.5 26.5 17 9.0 4.0 - - - -
Alloy X 55 - - - - 36 35 34 28 - - - - -

Creep Strength

Average Stress, ksi, for 1% Total Creep in 10,000 Hours

Alloy Temperature, °F
1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
RA 253 MA® 18 10 6.4 4.2 2.7 1.7 1.0 0.45 0.25 (0.18)
RA330® - 6.6 - 3.8 - 1.8 - 0.22 - -
RA 602 CA® - 26.8 - 9.4 - 2.38 1.52 0.96 0.59 0.33
RA333® 19.5 - - 5.3 - 2.45 - 0.77 - -

( ) Extrapolated

1% total creep includes the primary stage creep when the specimen is first loaded, as well as secondary stage creep.
Minimum creep rate data is based entirely on second stage creep.

Average Stress, ksi, for 0.00001% Per Hour Minimum Creep Rate – Extrapolated

Alloy Temperature, °F
900 1000 1100 1200 1300 1400 1500 1600 1700 1800
446 13 4.5 2 0.9 0.33 0.12 - - - -
304L - 7.8 5.1 3.25 2.1 1.34 0.88 - - -
304, 304H - 17.9 11.1 7.2 4.5 2.9 1.8 - - -
316L - 22.5 12 6.4 3.5 1.85 1 - - -
321 - - 9.2 3.9 1.7 0.74 0.32 - - -
321H - - 12.4 7 4 2.25 1.28 - - -
347, 347H - 30.5 16.2 8.7 4.7 2.5 1.3 - - -
RA 253 MA® - - 12 8.2 5.7 3.8 2.25 1.75 1.15 0.55
RA330® - 14.5 7.4 5.8 3.9 2.6 1.9 1.5 0.52 0.29
RA333® - - - 6.8 5.4 4.6 2.9 1.9 1.1 0.56
601 - - - - 5.2 2.9 1.9 1.4 - 0.48

*NOTE: In our opinion it is not good engineering practice to extrapolate data to 100,000 hours at temperatures above 1800°F.
This data is for general interest only.

Average Stress, ksi, for 0.0001% Per Hour Minimum Creep Rate

Alloy Temperature, °F
900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
446 16 6.0 3.0 1.5 0.68 0.26 0.13 - - - - -
304L - - 7.7 4.95 3.2 2.05 1.3 - - - - -
304, 304H - 25.5 16.5 10.8 7.0 4.6 2.95 - - - - -
316L - 23.5 14 8.3 4.9 2.9 1.75 - - - - -
321 - - 20 8.8 3.85 1.7 0.75 - - - - -
321H - - 20.3 12 7.1 4.2 2.5 - - - - -
347, 347H - 53 27.5 14.8 7.8 4.1 2.15 - - - - -
RA 253 MA® - - 18 11.6 7.7 5.0 3.35 2.3 1.5 0.89 0.49 (0.25)
309 - - - 16 8.8 3.4 2.4 1.4 0.6 0.22 - -
310 - - - 14.9 5.9 3.3 2.1 1.1 0.57 0.28 - -
RA330® - 21 10.5 7.6 5.3 3.6 2.7 2.1 1.0 0.5 - -
800 H/AT - - - 17 9.1 6.0 - 3.6 1.5 1.05 - -
RA333® - - 22 9.8 7.7 6.4 4.2 2.7 1.65 0.88 - -
601 - 41 27 18 7.2 4.1 2.7 2.0 - 0.76 - -
718 - - 100 74 43 - - - - - - -
600 - - - - - 3.6 - 0.75 - 0.56 - 0.27
Alloy X - - - - - - 14.7 7.2 2.7 0.7 - -

Rupture Strength

Average Extrapolated 100,000 Hour Rupture Strength, ksi – Extrapolated

Alloy Temperature, °F
1000 1100 1200 1300 1400 1500 1600 1700 1800
446 - 2.3 1.8 - 0.74 - 0.27 - 0.14
304L 19.5 11.6 6.9 4.1 2.4 1.45 - - -
304, 304H 25.8 15.8 9.8 6.0 3.7 2.3 - - -
316L 34.5 18.5 10.1 5.5 3.0 1.6 - - -
321 - 16.5 8.7 4.6 2.45 1.27 - - -
321H 29 17.4 10.3 6.1 3.6 2.1 - - -
347, 347H 37.5 20.8 11.5 6.4 3.55 1.95 - - -
RA 253 MA® - 15 8.7 4.6 2.9 2.1 1.45 0.97 0.7
RA 602 CA® - - 20.3 - 5.8 - 1.75 1.1 0.74
RA330® 20 12 7.8 4.8 2.7 1.65 1.0 0.58 0.33
800 H/AT - - 13 8.0 5.3 3.7 2.5 1.2 0.8
RA333® - - 11.5 8.4 6.5 3.7 1.9 1.05 0.58
601 - - - 6.8 4.0 - - - 0.7

*NOTE: In our opinion it is not good engineering practice to extrapolate data to 100,000 hours at temperatures above 1800°F.
This data is for general interest only.

Average 10,000 Hour Rupture Strength, ksi

Alloy Temperature, °F
1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200
446 - 3.5 2.7 - 1.1 - 0.45 - 0.23 - - - -
304L 25 15.6 9.7 6 3.7 2.3 1.4 - - - - - -
304, 304H 36 22.2 13.8 8.5 5.3 3.25 - - - - - - -
316L 39 23.5 14.2 8.5 5.1 3.05 - - - - - - -
321 34.5 23.5 12.9 7.2 4 2.28 - - - - - - -
321H - 24.8 15.2 9.2 5.6 3.4 - - - - - - -
347, 347H 48 27.5 15.6 9 5.1 2.9 - - - - - - -
RA 253 MA® - 22 14 8.5 5.2 3.75 2.5 1.65 1.15 0.86 0.68 - -
309 - - 17 8 4.8 2.7 1.6 1.0 0.56 - - - -
RA 602 CA® - - 31.2 - 11.3 - 3.2 2.18 1.49 0.99 0.67 0.44 -
310 - - 14.4 7.4 4.5 2.8 1.5 0.94 0.66 - - - -
RA330® 29 17 11 7.2 4.3 2.7 1.7 1.05 0.63 0.4 (0.28) - -
800 H/AT - - 17.5 11 7.3 5.2 3.5 1.9 1.2 - - - -
RA333® - 25 16.5 12 9.2 5.7 3.1 1.8 1.05 0.63 0.36 - 0.14
625 - - 42.5 22.5 12 (10) (7) (4) (1) - - - -
601 42 29 21 10 6.2 4 2.6 - 1.2 - 0.62 0.48 -
718 128 98 70 - - - - - - - - - -
600 - 21.5 13.5 9 6.2 3.7 2.35 1.65 1.15 - - - -
Alloy X - - - - 7.6 - 2.3 - - - - - -

Average Stress

Maximum Allowable Design Stresses for ASME Boiler and Pressure Vessel Code (Section II, Part D, table 1A)

Temperature °F SA-387* SA-387** 410
[S41000]
410S
[S41008]
17-4 H1150
[S17400]
304L
[S30403]
304H
[S30409]
316L
[S31603]
316H
[S31609]
347
[S34700]
Min. Tensile
Strength, ksi
60 60 65 60 135 70 75 70 75 75
Min. Yield
Strength, ksi
35 30 30 30 105 25

30

25 30 30
-20 to 100 17.1 17.1 18.6 17.1 38.6 16.7 20 16.7 20.0 20.0
200 17.1 17.1 18.4 17.1 38.6 14.3 20 16.7 20.0 20.0
300 17.1 16.6 17.8 16.8 38.6 12.8 18.9 16.7 20.0 18.8
400 17.1 16.6 17.4 16.5 37.5 11.7 18.3 15.7 19.3 17.8
500 17.1 16.6 17.2 16.3 36.8 10.9 17.5 14.8 18.0 17.2
600 17.1 16.6 16.8 15.9 36.2 10.4 16.6 14.0 17.0 16.9
650 17.1 16.6 16.6 15.6 35.9 10.2 16.2 13.7 16.6 16.8
700 17.1 16.6 16.2 15.2 - 10.0 15.8 13.5 16.3 16.8
750 17.1 16.6 15.7 14.7 - 9.8 15.5 13.2 16.1 16.8
800 16.8 16.6 15.1 14.1 - 9.7 15.2 12.9 15.9 16.8
850 16.4 16.6 14.4 13.4 - 9.5 14.9 12.7 15.7 16.8
900 13.7 13.6 12.3 12.3 - 9.3 14.6 - 15.6 16.7
950 9.3 10.8 8.8 8.8 - 9.1 14.3 - 15.4 16.6
1000 6.3 8.0 6.4 6.4 - 7.8 14 - 15.3 16.0
1050 4.2 5.7 4.4 4.4 - 6.3 12.4 - 15.1 12.1
1100 2.8 3.8 2.9 2.9 - 5.1 9.8 - 12.4 9.1
1150 1.9 2.4 1.8 1.8 - 4.0 7.7 - 9.8 6.1
1200 1.2 1.4 1.0 1.0 - 3.2 6.1 - 7.4 4.4
1250 - - - - - - 4.7 - 5.5 3.3
1300 - - - - - - 3.7 - 4.1 2.2
1350 - - - - - - 2.9 - 3.1 1.5
1400 - - - - - - 2.3 - 2.3 1.2
1450 - - - - - - 1.8 - 1.7 0.9
1500 - - - - - - 1.4 - 1.3 0.8
NOTES: S4, T4 S4, T4,
W7, W9
T4 T4 G-32, W1 G-36, T6 G5, T7 G5, G34 G5, T8 G5, G12,
T6

* Grade 11 Condition 1, ** Grade 22 Condition 1

Maximum Allowable Design Stresses for ASME Boiler and Pressure Vessel Code (Section II, Part D, table 1A)

Temperature °F 321
[S32100]
309H
[S30909]
310H
[S31009]
RA 253 MA®
[S30815]
RA330®
[N08330]
600
[N06600]
601
[N06601]
800 H/AT
[N08811]
RA 602 CA®
[N06025]
Min. Tensile
Strength, ksi
75 75 75 87 70 80 80 65 98
Min. Yield
Strength, ksi
30 30 30 45 30 35 30 25 39
-20 to 100 20.0 20.0 20.0 24.9 20 22.9 20.0 16.7 26.0
200 20.0 20.0 20.0 24.7 20 22.9 17.8 16.7 25.5
300 19.1 20.0 20.0 23.3 20 22.9 16.6 16.7 24.7
400 18.7 20.0 19.9 22.4 19.6 22.9 15.5 16.7 23.7
500 18.7 19.4 19.3 21.8 19.4 22.9 14.7 16.7 22.7
600 18.3 18.8 18.5 21.4 18.9 22.9 14.2 16.5 21.7
650 17.9 18.5 18.2 21.2 18.5 22.9 14.0 16.1 21.2
700 17.5 18.2 17.9 21.0 18.1 22.9 13.9 15.7 20.8
750 17.2 18.0 17.7 20.8 17.7 22.9 13.8 15.3 20.5
800 16.9 17.7 17.4 20.6 17.4 22.9 13.8 15.0 20.2
850 16.7 17.5 17.2 20.3 17 22.4 13.8 14.7 20.0
900 16.5 17.2 16.9 20.0 16.7 16.0 13.8 14.5 19.8
950 16.4 16.9 16.7 19.1 16.1 10.6 13.7 14.2 19.6
1000 14.9 13.8 13.8 14.9 12.7 7.0 13.7 14.0 16.3
1050 9.6 10.3 10.3 11.6 10 4.5 13.6 13.8 12.3
1100 6.9 7.6 7.6 9.0 7.8 3.0 10.4 12.9 9.2
1150 5.0 5.5 5.5 6.9 6 2.2 8.0 10.4 6.9
1200 3.6 4.0 4.0 5.2 4.7 2.0 6.1 8.3 4.1
1250 2.6 3.0 3.0 4.0 3.8 - 4.6 6.7 2.8
1300 1.7 2.2 2.2 3.1 3.1 - 3.6 5.4 2.0
1350 1.1 1.7 1.7 2.4 2.4 - 2.8 4.3 1.5
1400 0.8 1.3 1.3 1.9 1.8 - 2.1 3.4 1.2
1450 0.5 1.0 0.97 1.6 1.5 - 1.7 2.7 0.97
1500 0.3 0.75 0.75 1.3 1.1 - 1.3 2.2 0.80
1550 - - - 1.0 0.9 - 1.1 1.6 0.68
1600 - - - 0.86 0.68 - 0.87 1.2 0.58
1650 - - - 0.71 0.48 - 0.71 0.91 0.51
NOTES: G5, G12,
T6
G5, H1, T6 G5, T6 G5, G6, T5 G4, G5, H1,
T12
G5,T11 G4, T14 G4, G5, T15 Case 2359-2

* Grade 11 Condition 1, ** Grade 22 Condition 1

Maximum Allowable Design Stresses for ASME Boiler and Pressure Vessel Code (Section VIII, Div 1, 1B)

Temperature °F 718
[N07718]
LDX 2101®
[S32101]*
2205
[S31803]
ZERON® 100
[S32760]
AL-6XN®
[N08367]
625
[N06625]
Alloy 20
[N08020]
Alloy X
[N06002]
686
[N06686]
Min. Tensile
Strength, ksi
- 101* 90 - 95 120 80 95 100
Min. Yield
Strength, ksi
- 77* 65 - 45 60 35 35 45
-20 to 100 37.0 28.9 25.7 31.1 27.1 34.3 22.9 23.3 28.6
200 36.0 28.9 25.7 31 26.2 34.3 20.6 23.3 28.6
300 35.2 27.5 24.8 29.4 23.8 34.3 19.7 23.3 28.2
400 34.6 26.5 23.9 29 21.9 33.6 18.9 23.3 27.2
500 34.2 26.5 23.3 29 20.5 32.9 18.2 22.3 26.5
600 33.8 26.5 23.1 29 19.4 32.4 17.7 21.2 25.9
650 - - - - 19.0 32.1 17.5 20.7 25.7
700 33.6 - - - 18.6 31.8 17.4 20.3 25.4
750 33.5 - - - 18.3 31.5 17.2 20.1 25.2
800 33.3 - - - 18.0 31.2 16.8 19.9 24.9
850 33.1 - - - - 30.9 - 19.7 -
900 32.9 - - - - 30.6 - 19.6 -
950 32.6 - - - - 30.3 - 19.5 -
1000 32.3 - - - - 29.9 - 19.4 -
1050 32.0 - - - - 29.5 - 19.3 -
1100 30.7 - - - - 29 - 17.5 -
1150 29.5 - - - - 21 - 14.1 -
1200 - - - - - 13.2 - 11.3 -
1250 - - - - - - - 9.3 -
1300 - - - - - - - 7.7 -
1350 - - - - - - - 6.1 -
1400 - - - - - - - 4.8 -
1450 - - - - - - - 3.8 -
1500 - - - - - - - 3.0 -
1550 - - - - - - - 2.3 -
1600 - - - - - - - 1.7 -
1650 - - - - - - - 1.2 -
NOTES: Case 1993-6
See T Bolting
Case 2418-1 G32 Plate Case 2245-1 - G22, G23,
T16
- G4, G5, T15 G5

* Cold finished and heat treated (t < 0.0187 inch)

Thermal Expansion

in/in °F x 10-6

Alloy 200 400 600 800 1000 1200 1400 1600 1800 2000
304 9.6 - 9.9 - 10.2 10.4 - - - -
316 8.9 - 9 - 9.7 10.3 - - - -
2205 7.2 7.5 - - - - - - - -
321 9.3 9.4 9.5 10 10.3 10.6 10.9 11.1 11.4 -
309 8.8 9 9.3 - 9.7 - - 10.1 - -
310 8.4 8.8 8.95 9.2 9.5 9.8 10.05 10.15 10.5 10.6
SA-387 6.7 7.1 7.4 - 7.8 - - - - -
RA 253 MA® 9.06 9.34 9.59 9.81 9.97 10.14 10.3 10.5 10.8 -
410 5.5 - - - - 6.5 - - - -
RA 602 CA® 6.6 7.5 7.8 8.1 8.2 8.5 9 9.5 9.7 9.8
RA330® 8.3 8.6 8.9 - 9.3 9.6 - 9.8 10 -
HR-120® 7.95 8.29 8.56 8.8 8.98 9.24 9.52 9.72 9.87 -
800AT 7.9 8.8 9 9.2 9.4 9.6 9.9 10.2 - -
446 5.6 5.7 - 6 6.1 6.3 6.4 6.7 7.3 -
600 7.4 7.7 7.9 8.1 8.4 8.6 8.9 9.1 9.3 -
601 7.6 8.01 8.11 8.3 8.5 8.87 9.19 9.51 9.82 10.18
RA333® 7 - - - 8.6 9 9.3 9.4 9.7 -
Cast HH - - - - 9.5 9.7 9.9 10.2 10.5 10.7
Cast HK - - - - 9.4 9.6 9.8 10 10.2 10.4
Cast HT 7.9 8.14 8.37 8.61 8.85 9.09 9.33 9.56 9.8 10.04
Cast HP - - - - 9.2 9.5 9.8 10 10.3 10.6
825 7.8 8.3 8.5 8.7 8.8 9.1 9.5 9.7 - -
Alloy 20 8.2 8.4 8.65 - 8.95 9.15 9.3 9.5 - -
AL-6XN® 7.9 8.37 8.6 8.8 8.96 9.3 - - - -
TiGr 2 4.8 - 5.1 - 5.4 5.6 - - - -
Alloy X 7.7 7.8 7.9 8.2 8.4 8.6 8.8 9 9.2 -
625 7.1 7.3 7.4 7.6 7.8 8.2 8.5 8.8 - -
X-750 7.6 7.7 7.9 8.0 8.2 8.4 8.9 9.3 9.8 -
C263 6.1 6.7 7 7.1 7.6 7.9 8.4 9.1 9.9 -
718 7.3 7.5 7.7 8 8.1 8.4 8.9 9.5 9.8 10
René 41 6.6 6.9 7.1 7.3 7.7 7.9 8.3 8.8 9.3 9.9
WASPALOY 6.8 7 7.3 7.6 7.8 8.1 8.4 8.9 9.7 10.4
A-286 9.2 9.35 9.5 9.65 9.8 9.9 10.3 - - -
188 6.6 7 7.4 7.8 8.2 8.6 9 9.4 9.9 10.3
L-605 6.8 7.2 7.6 7.8 8 8.2 8.6 9.1 9.4 9.8
MULTIMET® N-155 7.9 8.4 8.5 8.7 9.1 9.5 9.7 9.9 10.1 10.3
Haynes® 556 8.1 8.2 8.4 8.6 8.8 9 9.2 9.4 9.5 9.6
Haynes® 230 7 7.2 7.4 7.6 7.9 8.1 8.3 8.6 8.9 -
617 6.4 7 7.4 7.6 7.7 8.0 8.4 8.7 9 9.2
W - - - 7.3 7.4 7.4 7.8 8.2 8.4 -
Haynes® 214 - 7.4 - 7.9 8.2 8.6 9 9.6 10.2 11.1