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Home >> Porsche >> 2022 >> 718 Boxster Base, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (5X - Body General) >> WM, 5X00IN04 Body Parts Of Various Sheet-Steel Strengths >> List Of Materials

List Of Materials

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A Sheet steel
B High-strength steel
C Very-high-strength steel
D Ultra-high-strength steel
Item Material group Material Proof stress(1) Tensile strength(2) Use/Characteristics
A Sheet steel DX54 120-220 N/mm2 260-350 N/mm2 Outer skin parts very malleable
Can be MIG welded
Part replacement as per Workshop Service Information
DX56 120-180 N/mm2 260-350 N/mm2
DX57 120-170 N/mm2 260-350 N/mm2
B High-strength steel HX260LAD 260-330 N/mm2 350-430 N/mm2 Reinforcement parts moderately to not very malleable
Can be MIG welded
Part replacement as per Workshop Service Information
HX340LAD 340-420 N/mm2 410-510 N/mm2
HX420LAD 420-520 N/mm2 470-590 N/mm2
C Very-high-strength steel HCT600X 340-420 N/mm2 > 690 N/mm2 Reinforcement parts not malleable
Can be MIG welded
Can be resistance spot-welded only using approved welders Part replacement is not permitted
HCT780X 470-600 N/mm2 > 780 N/mm2
D Ultra-high-strength steel 22Mn B5 > 950 N/mm2 > 1, 400 N/mm2 Pillars and columns not malleable
MIG welding permitted only in exceptional cases
Can be resistance spot-welded only using approved welders
Part replacement is not permitted
(1) Proof stress (yield stress) is the amount of mechanical stress above which a material will extend or buckle irreversibly or deform plastically.

(2) Tensile strength is the resistance of a material to a force tending to tear it apart. If the tensile force is greater than the tensile strength of a body, it will be damaged irreparably.