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ASTM A608/A608M-06(2012)
Standard Specification for Centrifugally Cast Iron-Chromium-Nickel High-Alloy Tubing for Pressure Application at High Temperatures
6 стр.
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Разработчик:
Зарубежные/ASTM
ICS:
23.040.10 Iron and steel pipes / Чугунные и стальные трубы23.040.40 Metal fittings / Металлические фитинги
Сборник (ASTM):
01.02 Ferrous Castings; Ferroalloys / Стальное литье, Ферросплавы
Тематика:
Steel--Structural, Tubes, Plate, Coated
Описание
Реферат

This specification covers the standard for iron-chromium-nickel, high-alloy tubes made by the centrifugal casting process intended for use under pressure at high temperatures. The tubing shall be supplied in the as cast condition or as cast with machining on the outside or inside surfaces. The material shall conform to the required chemical composition in carbon, manganese, silicon, chromium, nickel, phosphorus, sulfur, and molybdenum. Tension test shall be performed in the tubing at elevated temperature and shall conform to the required values in tensile strength and elongation. Tubing shall meet several tests such as; pressure test, flattening test, and mechanical test.

Область применения

1.1 This specification covers iron-chromium-nickel, high-alloy tubes made by the centrifugal casting process intended for use under pressure at high temperatures.

1.2 The grades of high alloys detailed in Table 1 are intended for applications requiring strength and resistance to corrosion and scaling at high temperatures.

1.3 Optional Supplementary Requirements S1 to S11 are provided; these call for additional tests to be made if desired.

1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of each other. Combining values from the two systems may result in nonconformance with the specification.

TABLE 1 Chemical Requirements

GradeComposition, %
CarbonManganese Silicon Chromium NickelPhosphorus Sulfur Molybdenum
HC300.250.350.51.00.502.0026304.0 max0.04 max0.04 max0.50 max
HD500.450.551.50 max0.502.002630470.04 max0.04 max0.50 max
HE350.300.401.50 max0.502.0026308110.04 max0.04 max0.50 max
HF300.250.351.50 max0.502.0019239120.04 max0.04 max0.50 max
HH300.250.351.50 max0.502.00242811140.04 max0.04 max0.50 max
HH33A0.280.381.50 max0.502.00242612140.04 max0.04 max0.50 max
HI350.300.401.50 max0.502.00263014180.04 max0.04 max0.50 max
HK300.250.351.50 max0.502.00232719220.04 max0.04 max0.50 max
HK400.350.451.50 max0.502.00232719220.04 max0.04 max0.50 max
HL300.250.351.50 max0.502.00283218220.04 max0.04 max0.50 max
HL400.350.451.50 max0.502.00283218220.04 max0.04 max0.50 max
HN400.350.451.50 max0.502.00192323270.04 max0.04 max0.50 max
HT500.400.601.50 max0.502.00151933370.04 max0.04 max0.50 max
HU500.400.601.50 max0.502.00172137410.04 max0.04 max0.50 max
HW500.400.601.50 max0.502.00101458620.04 max0.04 max0.50 max
HX500.400.601.50 max0.502.00151964680.04 max0.04 max0.50 max

A Manufacturing control should ensure that this composition contain a minimal amount of ferrite. See Supplementary Requirement S5.

Ключевые слова:
alloy; centrifugal casting; high temperatures; pressure containing parts; steel tube; temperature service applications; Centrifugal castings--specifications; Class codes (for metals/alloys); High-temperature service applications--steel tube; Iron-chromium castings--specifications; Pressure vessel steel tube--specifications; Steel tube--specifications