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The 2010 Hyundai Veracruz is constructed with a reinforced unibody. The body structure is made of high-tensile steel with engineered crumple zones. The Veracruz receieved a 4 Star Rollover Rating from the NHTSA. Side impacts the vehicle receieved 5 Stars. So there is high strengh in the pillars, but the roof may not be as strong.
How strong is manganese-boron steel? The image below shows how hot the boron blank is hotted up to before it is stamped!
By adding heat to the stamping process the B-Pillars can have the tensile strength increased by 500MPa. Standard steel B-Pillars are in the 500-700MPa range whereas this process will make a part into the 1500-1650MPa range.
The basic weight of the Audi Q5 at market launch is 1,730 kilograms (3836.04 lb), a low figure for an SUV of this size. The steel body is very light in weight, thanks to the intensive use of cutting-edge technologies.
The super-strength steels that reinforce the center tunnel, inner sills, B-posts, longitudinal members and bulkhead cross-member in the luggage compartment have tensile strengths as high as 1,600 megapascals.
Six Audi Q5 cars together weighing ten metric tons could be hung from a strip of this hot-formed material only two millimeters (0.08 in) thick and 30 millimeters (1.18 in) wide.
Hot forming is a hi-tech process. It involves heating blanks of boron steel to 950 degrees Celsius (1,742° F) in a conveyor oven and then quenching and shaping them in a cooled die.
Their various zones can be heated to different temperatures in the oven, to produce a range of strength zones. In the event of a crash, the component is then deformed in precisely the desired manner.
In the case of the B-post, for instance, the lower zone is rather more ductile (deformable) than the upper zone, since this is where most energy has to be dissipated in the event of a side-on collision.
On the body of the Audi Q5 – minus the doors, lids and metal panels – superstrength hi-tech steels make up an impressive 9.1 percent of the overall weight. 3.3 percent is made from ultra-high-strength steels, 12.3 percent from higherstrength grades, 44.5 percent from high-strength steel and 30.8 percent from conventional deep-drawn steel.
The Cayenne body is a study in advanced high-strength steels. The body is primarily high-strength steel, though the outer quarter panel and rear floor pan are mild steel and the hood and door window frames are aluminum. UHSS is used on the tubular reinforcement in the rocker panels, upper A-pillar reinforcements, inner B-pillar reinforcements, door intrusion beams, a floor pan crossmember between the B-pillars, and the floor pan tunnel. The UHSS inner B-pillar reinforcements and the upper A-pillar reinforcements are transformation induced plasticity (TRIP) 700 steel. The complete lower rails and rocker panel reinforcement tubes are dual-phase (DP) 600 steel. Tailored blanks are used on the outer front and rear rails, roof rails, and the door shells to vary the strength of the steels within the same part. Porsche uses boron-alloyed steel on several vehicles, especially on the door intrusion beams, though there is none on the Cayenne.