Key Takeaways
DC06 (EN 10130/EN 10139) is an extra-deep-drawing cold-rolled steel with yield 100-180 MPa and A80 elongation 39-42% by thickness.
The plastic strain ratio r ≥2.0 (weighted r = (r90 + 2r45 + r0)/4) indicates low anisotropy and good resistance to thinning.
Optimal grain size 7.0-8.5; uneven grains cause anisotropy and deep-drawing cracks.
Related grades: SPCC (JIS G3141, general forming) and SAE 1010 (structural components) - different systems, compare specified values.
1. Grade-System Comparison
DC06 is the extra-deep-drawing grade of EN 10130 (cold-rolled flat products) and EN 10139 (cold-rolled narrow strip), with yield 100-180 MPa and r ≥2.0; SPCC is the general-forming grade of JIS G3141; SAE 1010 is a structural carbon-steel designation per AISI/SAE.
The size 0.8 x 1200 mm is a typical supply dimension for appliance blanks.
Specifications of DC06 steel
| Quality | Standard | Material No. |
|---|---|---|
| DC06 | DIN EN 10130 | 1.0873 |
| DC06+ZE | DIN EN 10152 | 1.0873 |
| DIN EN Standard | Testing direction | Yield Point Re (MPa) |
Tensil Strength Rm (MPa) |
Elongation A80 (in %) |
r90 | n90 |
|---|---|---|---|---|---|---|
| 10130 | Q | ≤ 170 | 270 – 330 | ≥ 41 | ≥ 2,1 | ≥ 0,220 |
| 10152 | Q | ≤ 180 | 270 – 350 | ≥ 41 | ≥ 2,1 | ≥ 0,210 |
| C % |
Mn % |
P % |
S % |
Ti % |
|---|---|---|---|---|
| ≤ 0,02 | ≤ 0,25 | ≤ 0,020 | ≤ 0,020 | 0,3 |
2. Why the Yield Strength Is Marked "100-180 MPa"
It varies slightly depending on the thickness. When the material has no obvious yield point, Rp0.2 (specified non-proportional elongation strength) is used; when there is an obvious yield point, Rel (lower yield strength) is used. The overall range of 100-180 MPa ensures a balance between low strength and high plasticity, which is essential for extra-deep drawing.
3. Why Elongation Increases with Thickness
The elongation standard for DC06 (L0=80 mm, b=20 mm) is: thickness <0.7 mm ≥39%, 0.7-1.0 mm ≥40%, 1.0-1.6 mm ≥41%, ≥1.6 mm ≥42%. Thicker plates have more uniform grains and better deformation coordination during rolling, hence the slightly higher elongation.
4. The Plastic Strain Ratio r
r = true strain in the thickness direction / true strain in the width direction. A higher r value indicates stronger resistance to thickness reduction, making the sheet less prone to localised thinning and cracking during deep drawing. For DC06, r ≥2.0 (calculated as r = (r90 + 2r45 + r0)/4), indicating low anisotropy; the EN 10130 weighted minimum for r90 is typically about 2.1 - confirm the exact requirement with the standard edition and the order.
5. Grain-Size Requirements and Testing
The optimal grain size is 7.0-8.5 (industry recommendation). Grain uniformity is crucial - uneven grain size (e.g. finer at the beginning/end) leads to anisotropy in mechanical properties, increasing the risk of deep-drawing cracks; this is improved through the hot-rolled "U-shaped" cooling process. To test deep-drawing performance: 1) tensile test measuring Rp0.2, Rm and A80; 2) r/n value test in three directions (0°, 45°, 90°); 3) metallographic analysis of grain-size uniformity; 4) surface-quality inspection for defects affecting forming.
Frequently Asked Questions
Q1. What is DC06 used for?
Extra-deep-drawn appliance shells, automotive inner panels and complex stamped parts.
Q2. What is the yield strength of DC06?
100-180 MPa, reported as Rp0.2 or Rel depending on the yield behaviour.
Q3. Why does the r value matter?
Higher r means better resistance to local thinning and cracking in deep drawing.
Q4. Is SPCC the same as DC06?
No - SPCC is JIS general forming; DC06 is EN extra deep drawing; compare specified values.