HK40 CENTRIFUGALLY CAST 25Cr-20Ni-0.4C STEEL TUBES FOR USE IN REFORMER FURNACES (SCH 22-CF)

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HK40 CENTRIFUGALLY CAST 25Cr-20Ni-0.4C STEEL TUBES FOR USE IN REFORMER FURNACES (SCH 22-CF)
Categories:	Metal; Ferrous Metal; Superalloy
Material Notes:	Creep and rupture data provided by NIMS
Key Words:	UNS J94204; JIS G5122(91) SCH 22-CF; ASTM A351(94); ASTM A608(98)
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Mechanical Properties	Metric	English	Comments

Tensile Strength, Ultimate	440 MPa	63800 psi
Tensile Strength, Yield	235 MPa	34100 psi
Elongation at Break	8.0 %	8.0 %
Rupture Strength	6.00 - 7.00 MPa @Temperature 975 °C, Time 3.60e+8 sec	870 - 1020 psi @Temperature 1790 °F, Time 100000 hour
	6.00 - 8.00 MPa @Temperature 950 °C, Time 3.60e+8 sec	870 - 1160 psi @Temperature 1740 °F, Time 100000 hour
	7.00 - 10.0 MPa @Temperature 925 °C, Time 3.60e+8 sec	1020 - 1450 psi @Temperature 1700 °F, Time 100000 hour
	9.00 - 12.0 MPa @Temperature 900 °C, Time 3.60e+8 sec	1310 - 1740 psi @Temperature 1650 °F, Time 100000 hour
	11.0 - 15.0 MPa @Temperature 875 °C, Time 3.60e+8 sec	1600 - 2180 psi @Temperature 1610 °F, Time 100000 hour
	13.0 - 18.0 MPa @Temperature 850 °C, Time 3.60e+8 sec	1890 - 2610 psi @Temperature 1560 °F, Time 100000 hour
	16.0 - 22.0 MPa @Temperature 825 °C, Time 3.60e+8 sec	2320 - 3190 psi @Temperature 1520 °F, Time 100000 hour
	19.0 - 27.0 MPa @Temperature 800 °C, Time 3.60e+8 sec	2760 - 3920 psi @Temperature 1470 °F, Time 100000 hour

Component Elements Properties	Metric	English	Comments
Carbon, C	0.35 - 0.45 %	0.35 - 0.45 %
Chromium, Cr	23 - 27 %	23 - 27 %
Iron, Fe	46.72 - 57.65 %	46.72 - 57.65 %
Manganese, Mn	<= 1.5 %	<= 1.5 %
Molybdenum, Mo	<= 0.50 %	<= 0.50 %
Nickel, Ni	19 - 22 %	19 - 22 %
Phosphorus, P	<= 0.040 %	<= 0.040 %
Silicon, Si	<= 1.75 %	<= 1.75 %
Sulfur, S	<= 0.040 %	<= 0.040 %

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NIMS029 / 77546

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