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Extra Deep-Drawing
Steel (EDDS)
EDDS is produced from vacuum degassed steel to achieve a very low carbon content. It is chemically stabilized with elements such as titanium and niobium (columbium) during production to combine the remaning residual amounts of carbon and nitrogen to make it "interstitial-free." Excellent uniformity and exceptional formability characterize coated and uncoated sheet of this quality. The final product is excellent for deep drawn parts in that the sheet exhibits a high resistance to thinning during drawing.
EDDS sheet is non-aging, thus coil breaks, strain lines and fluting during fabrication are not encountered.
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Weldability – Low carbon level makes this a good welding
candidate.
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Fatigue Performance – Relatively low yield, compared to other
steels, makes this grade more susceptible to fatigue than higher
strength steels.
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Denting
– Relatively low yield strength, compared to other steels, may make
EDDS more susceptible to denting. For additional capabilities, please check our dent-resistant
steels.
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Applications
– EDDS is used in applications where severe forming characteristics are
required. EDDS is typically
found in door inners, dash panels, body side inners and floor pans with
spare tire tubs.
Typical
Properties for EDDS:
| Product |
Yield Strength [MPa] |
Tensile Strength [MPa] |
Elongation [%] |
n-value |
True Stress/Strain Curve |
| Cold Roll |
155 |
297 |
45 |
0.256 |
view |
| EG |
168 |
304 |
44 |
.239 |
view |
| EG Alloy |
168 |
308 |
44 |
0.239 |
view |
| HDGI |
145 |
303 |
46 |
0.240 |
view |
| HDGA |
145 |
303 |
46 |
0.240 |
view |
|