What is the core positioning of DC06 steel plate?
A: DC06 is an ultra-deep drawing grade cold-rolled low-carbon steel, belonging to the high-end product of cold-rolled steel plates. Its core advantages are high ductility, excellent formability, and high surface quality, specifically designed for deep drawing of complex-shaped parts.
What are the key indicators of DC06's "ultra-deep drawing" performance?
A: Key indicators include: yield strength 100-180MPa, tensile strength ≥250MPa (some standards 270-370MPa), elongation after fracture ≥39%-42% (increasing with thickness), plastic strain ratio r ≥2.0, and work hardening index n ≥0.22. These indicators ensure that it can withstand large tensile deformation without cracking.
What are the characteristics of DC06's chemical composition?
A: The core is the "ultra-low carbon" design: carbon (C) ≤0.03% (high-end standard ≤0.006%), manganese (Mn) ≤0.30%, phosphorus (P) ≤0.020%, sulfur (S) ≤0.020%, aluminum (Al) ≥0.015%-0.020%, with some titanium (Ti)/niobium (Nb) ≤0.20% (improving grain structure). Extremely low impurity content ensures high plasticity and corrosion resistance.
What is the core difference between DC06 and DC01-DC05? A: The main difference lies in deep-drawing performance and purity: DC06 is the ultra-deep-drawing grade (highest grade), with the lowest carbon content and the highest elongation and r-value; DC01-DC04 are ordinary/deep-drawing grades, with increasing strength but decreasing formability. DC06 is suitable for more complex drawn parts (such as automotive exterior panels), while DC01-DC05 are mostly used for simple bending and stamping parts.
What are the surface quality grades of DC06?
A: There are three grades: ①FB (O3): Allows for minor scratches and indentations that do not affect the molding process; ②FC (O4): No obvious defects on one side, and the other side meets the FB standard; ③FD (O5): No defects on one side (meets painting/electroplating requirements), and the other side meets the FB standard. O5 grade is commonly used for automotive exterior body panels.