Volvo C30 2007 Service And Repair Manual page 88

strength with the help of the alloy matter Vanadium, Niobium or Titanium.
DP steel (Dual Phase) obtains its increase in strength through the thermal treatment that the steel
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undergoes during manufacture. Then a two-phase structure of ferrite (iron) and martensite (carbon) is
formed. This steel loses its strength when exposed to temperatures above 300°C.
Extra High Strength Steel. This category contains both HSLA and DP steel, but the strength has been further
increased with greater additions of alloy substances.
Ultra High Strength Steel. There are two main types of steel in this category:
DP-steel. Here, strength has been further increased with an advanced manufacturing process and with
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higher additives of alloy substances.
BORON steel obtains its strength through the use of the basic element boron and contains relatively large
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amounts of carbon. The plate profiles are formed heated between the die cutter and die cushion, where the
material is also hardened. Due to its extremely high strength, it is difficult to straighten with good results.
Grinding or plasma cutting is recommended when replacing BORON steel components. BORON steel
welds well. It is not possible to galvanized BORON steel during the production process. It is therefore
very important to rustproof these components extra thoroughly.
CAUTION: BORON steel must not be straightened.
Fig. 14: Identifying Plastic, Material Information (Rear View)
Courtesy of VOLVO CARS CORPORATION
2012 Volvo C30 T-5
ACCESSORIES AND BODY, CAB Body Frame - General Information