Alloys tensile strength values

Alloy Tensile strength, (MPa) Yield strength, (MPa) Elongation (%) in 2 in. typical minimum values Brinell hardness... 

Figure 10.9. Peak room-temperature tensile strength values of the interfaces formed by AI2O3 with sessile drops of Ni or Ni-metal M alloys plotted as a function of the standard Gibbs energy of formation of M oxide, (Crispin and Nicholas 1976). Full circles Ni alloys hollow circle Ni from...

Thus, incorporating values for these four parameters into Equation 10.21 leads to the following alloy tensile strength ... 

Properties of copper—tin—lead alloys are Hsted in Table 10. The members of the tin bronze alloy group are cast using the centrifugal, continuous, permanent, plaster, and sand molding methods. Leaded tin—bronze alloys have minimum tensile strengths of 234—248 MPa (34,000—36,000 psi) as cast in sand molds, whereas the minimum tensile strengths for high leaded tin—bronze alloys are 138—207 MPa (20,000—30,000). The values are based on measurement of test bars cast in sand molds. 

Table 7 gives the composition of gold alloys available for commercial use. The average coefficient of thermal expansion for the first six alloys Hsted is (14-15) X 10 j° C from room temperature to ca 1000°C two opaque porcelains used with them have thermal coefficient expansion of 6.45 and 7.88 X 10 from room temperature to 820°C (91). The HV values of these alloys are 109—193, and the tensile strengths are 464—509 MPa (67-74 X 10 psi). For the last four alloys in Table 7, the HV values are 102—216, and the tensile strengths are 358—662 MPa (52-96 x 10 psi), depending upon thermal history. 

Tench and White (12) have shown that the room-temperature tensile strength of CMA (composition-modulated alloy) Ni-Cu exhibits values around three times that of nickel itself. The hardness of the same CMA has been demonstrated by Gimunovich et al. (13) to be many times greater. This is so as long as the thickness of the CMA layers is less than lOOnm. Stress due to lattice mismatch may be the prime cause of this. 

In hardness tests of metals and their alloys, Davidenkov s scratch point method has found use through a strict relationship of the result to true tensile strength [Pg.31]

Tench and White have shown (12) that the room-temperature tensile strength of CM A (composition-modulated alloy) Ni-Cu exhibits values around three times that... 

In the previous experiment, where the effect of cobalt contents on steel tensile strength was researched, we are now trying to find out the effect of three percentile contents of cobalt on this response if each alloy was tempered in each of four furnaces. Twelve alloy batches were divided into three samples each, so that the tensile strength for 36 samples were measured. These values in thousands of PSI for measurements or determinations are shown in Table 2.51. Do the analysis of variance. 

It should be noted that the factors of safety mentioned above are not applicable in general to all materials at these temperatures but are chosen with reference to steel and its alloys only. A material such as duralumin, for instance, has a tensile strength at room temperature which compares favorably with that of steel. This aluminum alloy is weakened by an increase in temperature to a much greater degree than steel, however. For high pressure work, duralumin has little value at temperatures above 250° to 300° C. 

---