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Stainless  Steel Cables

MP-35N

Electrical Resistance Considerations

Operating Procedures

Applications

Mechanical Properties

Metallurgy

Figures 1, 2, 3, 7,8

Physical Properties

SUPA 70

SUPA 75

SUPA 70, 75, 80

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Mechanical Properties

The mechanical properties of MP35N wire are primarily the result of drawing. Typical curves for the cold working of MP35N bar are shown in Figures 1 and 2. Both the tensile strength and the hardness increase rapidly with the percent reduction. Aging treatments cause further increases in both strength and hardness.

Similar curves can be developed for the drawing of wire; however, the tensile strength obtained upon drawing wire is related to the wire size and to the drawing and annealing practice. A typical range of tensile values for cold drawn wire is given in Figure 3 for wire in sizes from .200 down to .002 inch.

Further strengthening may be attained by aging at elevated temperatures. Aging 1 at temperatures from 800 to 1200°F may cause further increases in strength from 15 to 40,000 psi beyond those shown in Figure 3, depending on the reduction, the temperature and the time of exposure. Temperatures below 600° F do not affect the tensile behavior of drawn wire. Aging results in decreases in ductility of drawn wire product and, hence, is subject to limitations.

Wire is typically utilized in the spring temper condition, and is specified by tensile strength as follows:

.200 to .175 in.- 180/210,000 psi; .175 to .160 in--

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