Docol 500DP: Docol 500DP dual-phase steel has good formability and weldability and is suitable for automotive safety components such as reinforcements. This steel is subjected to a special heat treatment, which mainly produces a two-phase structure. Ferrite, which can impart formability, represents one phase, while martensite, which is responsible for strength, represents the other phase. Bainite may also be present as a complementary phase.
Mechanical Properties
| Steel Grade | Standard | Plating | Test Direction | Yield Strength Rp0.2 (MPa) | Tensile Strength Rm (MPa) | Extension Rate A80( min%) | Minimum Bend Inner Diameter for 90 ° Bend |
| Docol CR290Y490T-DP | VDA239- 100:2016 | UC, GI, GA*, FR | L | 290-380 | 490-600 | 24 | UC 0.0xtGI, GA, FI0.5xt |
| Docol CR230Y500T- DL | SSAB | UC | T | 230-300 | 500-600 | 24 | 0.0xt |
| Docol CR290Y500T- DP | SSAB | UC | T | 290-370 | 500-600 | 20 | 0.0xt |
Chemical Composition
| Steel Grade | Plating | C (max %) | Si (max %) | Mn(max %) | P (max %) | S(max %) | Al( %) | Cr Mo(max%) | B(max %) | Nb Title(max %) |
| Docol CR290Y490T-DP | UC | 0.10 | 0.50 | 1.00 | 0.025 | 0.010 | 0.015- | - | 0.10 | - |
| Docol CR290Y490T-DP | GI,GA,ZA | 0.14 | 0.50 | 1.80 | 0.050 | 0.010 | 0.015-1.0 | 1.00 | 0.15 | 0.005 |
| Docol CR230Y500T- DL | UC | 0.08 | 0.40 | 1.80 | 0.025 | 0.010 | 0.015- | - | 0.10 | - |
| Docol CR290Y500T- DP | UC | 0.10 | 0.50 | 1.00 | 0.025 | 0.010 | 0.015- | - | 0.10 | - |
Plating
| Plating Type | Plating Grade | Standard | Single-sided coating quality, single-point test (g/m2) | Single side thickness, for reference only(μm) |
| GI | 40/40 | VDA239-100 | 40-60 | 5.6-8.5 |
| GI | 50/50 | VDA239-100 | 50-70 | 7.0-9.9 |
| GI | 60/60 | VDA239-100 | 60-90 | 8.5-12.7 |
| GI | 70/70 | VDA239-100 | 70-100 | 9.9-14.1 |
| GI | 85/85 | VDA239-100 | 85-115 | 12.0-16.2 |
| GI | 115/115 | VDA239-100 | 115-155 | 16.2-21.8 |
| GA | 40/40 | VDA239-100 | 40-60 | 5.6-8.5 |
| GA | 50/50 | VDA239-100 | 50-80 | 7.0-11.3 |
| ZA | 95 | As required |
| 7- |
| ZA | 130 | As required |
| 10- |
