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Advanced
High-Strength Steels
Advanced
high-strength steels (AHSS) include DUAL-TEN®
(dual phase) steel and
transformation induced plasticity (TRIP) steels.
The minimum tensile strengths range from 500 to 800 MPa.
These steels are gaining popularity in automotive applications
because they are easier to form than HSLA grades with similar initial
yield strengths but have a much higher final part strength.
As a result, advanced high-strength steels are ideal for crash
energy management, fatigue and durability sensitive parts, or thin
gauge exposed panels that are subjected to denting loads. With proper
design strategy, DUAL-TEN® (dual phase) steels offer a great opportunity for part downgaging,
body in white weight reduction, improvement of a car fuel economy and
crash performance.
The
unique characteristics of advanced high-strength steels are developed
by a continuous heat treating process that creates martensite in the
steel microstructure. The
amount of martensite, together with the amount of carbon, will
determine the strength level of the steel.
When
compared to other grades, specifically high-strength, low-alloy steels,
the classification for advanced high-strength steels are based on
minimum tensile strength. For
more detailed mechanical properties, please refer to the specific
sections of our web site.
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