Inconel 600.pdf

MMPDS-01
31 January 2003
6.1.1 MATERIAL PROPERTIES
6.1.1.1 Mechanical Properties — The mechanical properties of the heat-resistant alloys are
affected by relatively minor variations in chemistry, processing, and heat treatment. Consequently, the
mechanical properties shown for the various alloys in this chapter are intended to apply only to the alloy,
form (shape), size (thickness), and heat treatment indicated. When statistical values are shown, these are
intended to represent a fair cross section of all mill production within the indicated scope.
Strength Properties — Room-temperature strength properties for alloys in this chapter are based
primarily on minimum tensile property requirements of material specifications. Values for nonspecification
strength properties are derived. The variation of properties with temperature and other data or interest are
presented in figures or tables, as appropriate.
The strength properties of the heat-resistant alloys generally decrease with increasing temperatures
or increasing time at temperature. There are exceptions to this statement, particularly in the case of agehardening
alloys; these alloys may actually show an increase in strength with temperature or time, within a
limited range, as a result of further aging. In most cases, however, this increase in strength is temporary and,
furthermore, cannot usually be taken advantage of in service. For this reason, this increase in strength has
been ignored in the preparation of elevated temperature curves as described in Chapter 9.
At cryogenic temperatures, the strength properties of the heat-resistant alloys are generally higher
than at room temperature, provided some ductility is retained at the low temperatures. For additional
information on mechanical properties at cryogenic temperatures, other references, such as the Cryogenic
Materials Data Handbook (Reference 6.1.1.1), should be consulted.
Ductility — Specified minimum ductility requirements are presented for these alloys in the roomtemperature
property tables. The variation in ductility with temperature is somewhat erratic for the heatresistant
alloys. Generally, ductility decreases with increasing temperature from room temperature up to
about 1200EF to 1400EF, where it reaches a minimum value, then it increases with higher temperatures. Prior
creep exposure may also affect ductility adversely. Below room temperature, ductility decreases with
decreasing temperature for some of these alloys.
Stress-Strain Relationships — The stress-strain relationships presented are typical curves prepared
as described in Section 9.3.2.
Creep — Data covering the temperatures and times of exposure and the creep deformations of interest
are included as typical information in individual material sections. These presentations may be in the form
of creep stress-lifetime curves for various deformation criteria as specified in Chapter 9 or as creep
nomographs.
Fatigue — Fatigue S/N curves for unnotched and notched specimens at room temperature and elevated
temperatures are shown in each alloy section. Fatigue crack propagation data are also presented.
6.1.1.2 Physical Properties —Selected physical-property data are presented for these alloys.
Processing variables and heat treatment have only a slight effect on these values; thus, the properties listed
are applicable to all forms and heat treatments.
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