DUAL-TEN^® Brochure - Strain Aging

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U. S. Steel's HDG DUAL-TEN^® steel and HDGA DUAL-TEN^® steel will not age at room temperature.  Figure 1 shows after pre-straining the yield strength change over 60 days.  No change in yield strength occurs even with 2% pre-strain.  However, unlike conventional HSLA steels, DUAL-TEN^® steel shows bake hardening.

Figure 1: Room Temperature Strain Aging

Figure 2 shows yield strength change from strain hardening and bake hardening for DUAL-TEN^® steel.  The data were obtained from a 2% uniaxially pre-strained specimen after baking at 175°C (350°F) for 30 minutes.  For comparison, data for HSLA 340 are also included.  DUAL-TEN^® steel shows significantly higher bake hardening and strain hardening than HSLA.

Figure 2: Strain and Bake Hardening Behavior

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