»| Tech Tips |« steel will lose its strength if it’s exposed to temperatures exceeding 300 °C. 䡲 EHS (Extra High Strength Steel) EHS has a yield point between 450 and 800 MPa. It’s light gray in the illustration. Both HSLA and DP steel are within this group, although the strength has been increased through the addition of greater alloy substances. 䡲 UHS (Ultra High Strength Steel) UHS has a yield point between 800 and 1400 MPa. UHS is dark gray in the illustration. There are two main types of steel within this group: 1. DP steel The strength is even higher due to an advanced manufacturing process and the greater quantities of alloys.
32
March 2013 | BodyShop Business
2. Boron steel The addition of boron gives this steel greater strength. Boron steel also contains relatively high quantities of carbon. The profiles of the sheets are formed between a press and pad while the metal is red hot. The material also hardens here. These sections must not be straightened because of their extremely high strength. NOTE: These repair/service procedures are excerpted from information published by the vehicle manufacturer and are intended for the purpose of promoting OE collision repair information to trained, professional technicians with the knowledge, tools and equipment to do the job properly and safely. Before attempting any repairs described, refer to the complete article in ALLDATA Collision S3500. It’s
Circle 32 for Reader Service
recommended that these procedures not be performed by “do-it-yourselfers.” BSB Dan Espersen is ALLDATA’s senior collision program manager, holds an AA degree in automotive technology, and has 46 years of experience in the automotive industry, 19 in collision. © 2013 ALLDATA LLC. All rights reserved. All technical information, images and specifications are from ALLDATA Collision S3500. ALLDATA is a registered trademark and ALLDATA Collision S3500 is a mark of ALLDATA LLC. Lexus and GS 350 are registered trademarks of Toyota Motor Sales, U.S.A. Volvo and XC90 are registered trademarks of AB Volvo, Volvo Car Corporation or Volvo Cars of North America, LLC. All other marks are the property of their respective holders.