DUAL-TEN^® Brochure - Strain Hardening and Forming Properties

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DUAL-TEN^® steel has a higher tensile-to-yield strength ratio than conventional high-strength steels.  This greater strength ratio, coupled with zero YPE, enables DUAL-TEN^® steel to have rapid strain hardening at lower strain levels.  Figure 3 shows the instantaneous n-value change with strain.  DUAL-TEN^® steel exhibits superior initial strain hardening behavior when compared to HSLA.

Figure 3: Instantaneous n-value Change with Strain

The initial high strain hardening behavior of DUAL-TEN^® steel enhances strain distribution ability during stamping and limits buckling during end feeding in a hydro-forming process.  Figure 4 shows that DUAL-TEN^® 600/590 steel has increased draw depth capability as compared to HSLA 340 under the same forming conditions using a T-channel test.

Figure 4: Draw Depth from a T-Channel Test [7]

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