Mazda MX-5 2007 Bodyshop Manual page 23

ADOPTION OF ULTRA HIGH-TENSION STEEL[CONSTRUCTION]
Characteristics of Ultra High-Tensile Steel Plates
• Ultra high-tensile steel plates have enhanced tensile strength compared to previous high-tensile steel plates.
• Because the strength is maintained even though the plates are thin-walled, the ultra high-tensile steel plates
are used for the frames and the main frame parts which form the cabin, reducing the weight of the vehicle.
• Enhanced shock absorption has improved the safety.
Range of Use and Cautions for Service
• Because the ultra high-tensile steel is hard and it may be difficult to reform, when extracting the damaged part
using a frame repair machine, perform the work verifying that other parts are not affected.
• When drilling welded parts, use a well-ground drill bit.
• After welding, inspect the weld strength. If adhesion is poor, perform CO2 arc welding (plug welding).
HINGE PILLAR REINFORCEMENT
(INNER)
FRONT FRAME
REINFORCEMENT
(OUTER) *1
SUSPENSION *1
HOUSING
(UPPER)
FLOOR REINFORCEMENT *2
FRONT SIDE FRAME
*1 : Indicates tensile strength of 590 MPa.
*2 : Indicates tensile strength of 780 MPa.
End Of Sie
BODY STRUCTURE [CONSTRUCTION]
SIDE SILL (INNER)
SIDE SILL
*1
(INNER,REAR)
*2
FRONT FRAME REAR
*2
REAR SIDE FRAME
*1
FRONT B FRAME
SIDE SILL REINFORCEMENT
(FRONT)
*1
id098007785600
*1
*1
CROSSMEMBER No.3
*2
*1
D5U0980B031
09-80A–5
09-80A