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Elmet Technologies

Haynes Hastelloy® C-4 alloy, sheet, aged 100 hours at 899°C
Categories: Metal; Nonferrous Metal; Nickel Alloy; Superalloy
Material Notes: Nickel-chromium-molybdenum alloy with outstanding high-temperature stability as evidenced by high ductility and corrosion resistance even after aging in the 1200 to 1900°F (649 to 1038°C) range. This alloy resists the formation of grain-boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in the as-welded condition. C-4 alloy also has excellent resistance to stress-corrosion cracking and to oxidizing atmospheres up to 1900°F (1038°C).

HASTELLOY C-4 alloy has exceptional resistance to wide variety of chemical process environments. These include hot contaminated mineral acids, solvents, chlorine and chlorine contaminated media (organic and inorganic), dry chlorine, formic and acetic acids, acetic anhydride, and seawater and brine solutions. Laboratory precipitation studies on C-4 alloy indicate that the intermetallic precipitates (Mu phase) associated with other nickel alloys in the 1200 to 2000°F (649 to 1093°C) temperature range have not been detected. Fine intergranular M6C carbides can form but their damaging effect is minimal.

HASTELLOY C-4 alloy can be forged, hot-upset, and impact extruded. Although the alloy tends to work-harden, it can be successfully deep-drawn, spun, press formed or punched. All of the common methods of welding can be used to weld HASTELLOY C-4 alloy, although the oxy-acetylene and submerged arc processes are not recommended when the fabricated item is intended for use in corrosion service. Special precautions should be taken to avoid excessive heat input.

Wrought forms of HASTELLOY C-4 alloy are furnished in the solution heat-treated condition unless otherwise specified. C-4 alloy is solution heat-treated at 1950°F (1066°C) and rapid quenched.

Data provided by the manufacturer, Haynes International, Inc.
Key Words: UNS N06455; ASME SB-574, ASME SB-575, ASME SB-6119, SB-622 and ASME SB-626
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Physical PropertiesMetricEnglishComments
Density 8.64 g/cc0.312 lb/in³at RT
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate  507 MPa
@Thickness 9.50 mm,
Temperature 760 °C		73500 psi
@Thickness 0.374 in,
Temperature 1400 °F
 525 MPa
@Thickness 3.20 mm,
Temperature 760 °C		76100 psi
@Thickness 0.126 in,
Temperature 1400 °F
 597 MPa
@Thickness 3.20 mm,
Temperature 649 °C		86600 psi
@Thickness 0.126 in,
Temperature 1200 °F
 618 MPa
@Thickness 9.50 mm,
Temperature 538 °C		89600 psi
@Thickness 0.374 in,
Temperature 1000 °F
 618 MPa
@Thickness 9.50 mm,
Temperature 649 °C		89600 psi
@Thickness 0.374 in,
Temperature 1200 °F
 643 MPa
@Thickness 3.20 mm,
Temperature 538 °C		93300 psi
@Thickness 0.126 in,
Temperature 1000 °F
 669 MPa
@Thickness 3.20 mm,
Temperature 427 °C		97000 psi
@Thickness 0.126 in,
Temperature 801 °F
 670 MPa
@Thickness 9.50 mm,
Temperature 427 °C		97200 psi
@Thickness 0.374 in,
Temperature 801 °F
 676 MPa
@Thickness 9.50 mm,
Temperature 316 °C		98000 psi
@Thickness 0.374 in,
Temperature 601 °F
 686 MPa
@Thickness 3.20 mm,
Temperature 316 °C		99500 psi
@Thickness 0.126 in,
Temperature 601 °F
 694 MPa
@Thickness 9.50 mm,
Temperature 204 °C		101000 psi
@Thickness 0.374 in,
Temperature 399 °F
 712 MPa
@Thickness 3.20 mm,
Temperature 204 °C		103000 psi
@Thickness 0.126 in,
Temperature 399 °F
 771 MPa
@Thickness 9.50 mm,
Temperature 20.0 °C		112000 psi
@Thickness 0.374 in,
Temperature 68.0 °F
 790 MPa
@Thickness 3.20 mm,
Temperature 20.0 °C		115000 psi
@Thickness 0.126 in,
Temperature 68.0 °F
Tensile Strength, Yield  205 MPa
@Thickness 9.50 mm,
Temperature 760 °C		29700 psi
@Thickness 0.374 in,
Temperature 1400 °F		0.2% offset
 221 MPa
@Thickness 9.50 mm,
Temperature 538 °C		32100 psi
@Thickness 0.374 in,
Temperature 1000 °F		0.2% offset
 235 MPa
@Thickness 9.50 mm,
Temperature 649 °C		34100 psi
@Thickness 0.374 in,
Temperature 1200 °F		0.2% offset
 250 MPa
@Thickness 3.20 mm,
Temperature 760 °C		36300 psi
@Thickness 0.126 in,
Temperature 1400 °F		0.2% offset
 255 MPa
@Thickness 9.50 mm,
Temperature 316 °C		37000 psi
@Thickness 0.374 in,
Temperature 601 °F		0.2% offset
 256 MPa
@Thickness 3.20 mm,
Temperature 649 °C		37100 psi
@Thickness 0.126 in,
Temperature 1200 °F		0.2% offset
 256 MPa
@Thickness 9.50 mm,
Temperature 427 °C		37100 psi
@Thickness 0.374 in,
Temperature 801 °F		0.2% offset
 272 MPa
@Thickness 9.50 mm,
Temperature 204 °C		39500 psi
@Thickness 0.374 in,
Temperature 399 °F		0.2% offset
 275 MPa
@Thickness 3.20 mm,
Temperature 538 °C		39900 psi
@Thickness 0.126 in,
Temperature 1000 °F		0.2% offset
 280 MPa
@Thickness 3.20 mm,
Temperature 427 °C		40600 psi
@Thickness 0.126 in,
Temperature 801 °F		0.2% offset
 297 MPa
@Thickness 3.20 mm,
Temperature 316 °C		43100 psi
@Thickness 0.126 in,
Temperature 601 °F		0.2% offset
 325 MPa
@Thickness 3.20 mm,
Temperature 204 °C		47100 psi
@Thickness 0.126 in,
Temperature 399 °F		0.2% offset
 336 MPa
@Thickness 9.50 mm,
Temperature 20.0 °C		48700 psi
@Thickness 0.374 in,
Temperature 68.0 °F		0.2% offset
 376 MPa
@Thickness 3.20 mm,
Temperature 20.0 °C		54500 psi
@Thickness 0.126 in,
Temperature 68.0 °F		0.2% offset
Elongation at Break  51 %
@Thickness 9.50 mm,
Temperature 204 °C		51 %
@Thickness 0.374 in,
Temperature 399 °F		in 50.8 mm
 53 %
@Thickness 9.50 mm,
Temperature 538 °C		53 %
@Thickness 0.374 in,
Temperature 1000 °F		in 50.8 mm
 54 %
@Thickness 3.20 mm,
Temperature 204 °C		54 %
@Thickness 0.126 in,
Temperature 399 °F		in 50.8 mm
 56 %
@Thickness 3.20 mm,
Temperature 20.0 °C		56 %
@Thickness 0.126 in,
Temperature 68.0 °F		in 50.8 mm
 56 %
@Thickness 3.20 mm,
Temperature 649 °C		56 %
@Thickness 0.126 in,
Temperature 1200 °F		in 50.8 mm
 56 %
@Thickness 3.20 mm,
Temperature 760 °C		56 %
@Thickness 0.126 in,
Temperature 1400 °F		in 50.8 mm
 56 %
@Thickness 9.50 mm,
Temperature 316 °C		56 %
@Thickness 0.374 in,
Temperature 601 °F		in 50.8 mm
 56 %
@Thickness 9.50 mm,
Temperature 649 °C		56 %
@Thickness 0.374 in,
Temperature 1200 °F		in 50.8 mm
 57 %
@Thickness 3.20 mm,
Temperature 316 °C		57 %
@Thickness 0.126 in,
Temperature 601 °F		in 50.8 mm
 57 %
@Thickness 3.20 mm,
Temperature 538 °C		57 %
@Thickness 0.126 in,
Temperature 1000 °F		in 50.8 mm
 57 %
@Thickness 9.50 mm,
Temperature 427 °C		57 %
@Thickness 0.374 in,
Temperature 801 °F		in 50.8 mm
 60 %
@Thickness 3.20 mm,
Temperature 427 °C		60 %
@Thickness 0.126 in,
Temperature 801 °F		in 50.8 mm
 62 %
@Thickness 9.50 mm,
Temperature 20.0 °C		62 %
@Thickness 0.374 in,
Temperature 68.0 °F		in 50.8 mm
 70 %
@Thickness 9.50 mm,
Temperature 760 °C		70 %
@Thickness 0.374 in,
Temperature 1400 °F		in 50.8 mm
Modulus of Elasticity 211 GPa30600 ksiRT
 141 GPa
@Temperature 982 °C		20500 ksi
@Temperature 1800 °F
 152 GPa
@Temperature 871 °C		22000 ksi
@Temperature 1600 °F
 162 GPa
@Temperature 760 °C		23500 ksi
@Temperature 1400 °F
 171 GPa
@Temperature 649 °C		24800 ksi
@Temperature 1200 °F
 179 GPa
@Temperature 538 °C		26000 ksi
@Temperature 1000 °F
 187 GPa
@Temperature 427 °C		27100 ksi
@Temperature 801 °F
 194 GPa
@Temperature 316 °C		28100 ksi
@Temperature 601 °F
 201 GPa
@Temperature 204 °C		29200 ksi
@Temperature 399 °F
 207 GPa
@Temperature 93.0 °C		30000 ksi
@Temperature 199 °F
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity  0.000125 ohm-cm
@Temperature 100 °C		0.000125 ohm-cm
@Temperature 212 °F
 0.000125 ohm-cm
@Temperature 23.0 °C		0.000125 ohm-cm
@Temperature 73.4 °F
 0.000126 ohm-cm
@Temperature 200 °C		0.000126 ohm-cm
@Temperature 392 °F
 0.000127 ohm-cm
@Temperature 300 °C		0.000127 ohm-cm
@Temperature 572 °F
 0.000128 ohm-cm
@Temperature 400 °C		0.000128 ohm-cm
@Temperature 752 °F
 0.000129 ohm-cm
@Temperature 500 °C		0.000129 ohm-cm
@Temperature 932 °F
 0.000132 ohm-cm
@Temperature 600 °C		0.000132 ohm-cm
@Temperature 1110 °F
 
Thermal PropertiesMetricEnglishComments
CTE, linear  10.8 µm/m-°C
@Temperature 20.0 - 93.0 °C		6.00 µin/in-°F
@Temperature 68.0 - 199 °F
 11.9 µm/m-°C
@Temperature 20.0 - 204 °C		6.61 µin/in-°F
@Temperature 68.0 - 399 °F
 12.6 µm/m-°C
@Temperature 20.0 - 316 °C		7.00 µin/in-°F
@Temperature 68.0 - 601 °F
 13.3 µm/m-°C
@Temperature 20.0 - 538 °C		7.39 µin/in-°F
@Temperature 68.0 - 1000 °F
 13.3 µm/m-°C
@Temperature 20.0 - 427 °C		7.39 µin/in-°F
@Temperature 68.0 - 801 °F
 13.5 µm/m-°C
@Temperature 20.0 - 649 °C		7.50 µin/in-°F
@Temperature 68.0 - 1200 °F
 14.4 µm/m-°C
@Temperature 20.0 - 760 °C		8.00 µin/in-°F
@Temperature 68.0 - 1400 °F
 14.9 µm/m-°C
@Temperature 24.0 - 871 °C		8.28 µin/in-°F
@Temperature 75.2 - 1600 °F
 15.7 µm/m-°C
@Temperature 20.0 - 982 °C		8.72 µin/in-°F
@Temperature 68.0 - 1800 °F
Specific Heat Capacity  0.406 J/g-°C
@Temperature 0.000 °C		0.0970 BTU/lb-°F
@Temperature 32.0 °F
 0.427 J/g-°C
@Temperature 100 °C		0.102 BTU/lb-°F
@Temperature 212 °F
 0.448 J/g-°C
@Temperature 200 °C		0.107 BTU/lb-°F
@Temperature 392 °F
 0.465 J/g-°C
@Temperature 300 °C		0.111 BTU/lb-°F
@Temperature 572 °F
 0.477 J/g-°C
@Temperature 400 °C		0.114 BTU/lb-°F
@Temperature 752 °F
 0.490 J/g-°C
@Temperature 500 °C		0.117 BTU/lb-°F
@Temperature 932 °F
 0.502 J/g-°C
@Temperature 600 °C		0.120 BTU/lb-°F
@Temperature 1110 °F
Thermal Conductivity  10.1 W/m-K
@Temperature 23.0 °C		70.1 BTU-in/hr-ft²-°F
@Temperature 73.4 °F
 11.4 W/m-K
@Temperature 100 °C		79.1 BTU-in/hr-ft²-°F
@Temperature 212 °F
 13.2 W/m-K
@Temperature 200 °C		91.6 BTU-in/hr-ft²-°F
@Temperature 392 °F
 15.0 W/m-K
@Temperature 300 °C		104 BTU-in/hr-ft²-°F
@Temperature 572 °F
 16.7 W/m-K
@Temperature 400 °C		116 BTU-in/hr-ft²-°F
@Temperature 752 °F
 18.4 W/m-K
@Temperature 500 °C		128 BTU-in/hr-ft²-°F
@Temperature 932 °F
 20.5 W/m-K
@Temperature 600 °C		142 BTU-in/hr-ft²-°F
@Temperature 1110 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C <= 0.010 %<= 0.010 %
Chromium, Cr 14 - 18 %14 - 18 %
Cobalt, Co <= 2.0 %<= 2.0 %
Iron, Fe <= 3.0 %<= 3.0 %
Manganese, Mn <= 1.0 %<= 1.0 %
Molybdenum, Mo 14 - 17 %14 - 17 %
Nickel, Ni 58 %58 %As Remainder
Phosphorus, P <= 0.025 %<= 0.025 %
Silicon, Si <= 0.080 %<= 0.080 %
Sulfur, S <= 0.010 %<= 0.010 %
Titanium, Ti <= 0.70 %<= 0.70 %
 
Descriptive Properties
Average Oxidation Rate per 100-hour test period (mm)0.004at 1038°C
Thermal Diffusivity0.028 cm2/sat 23°C
 0.031 cm2/sat 100°C
 0.033 cm2/sat 200°C
 0.037 cm2/sat 300°C
 0.04 cm2/sat 400°C
 0.043 cm2/sat 500°C
 0.047 cm2/sat 600°C

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