SPHD

Pickled SPHD is a hot-rolled drawing-quality steel that has undergone acid treatment to remove surface scale, resulting in improved cleanliness and formability. Designed for deep drawing and demanding forming processes, it offers excellent ductility and surface smoothness, making it especially suitable for automotive body panels, appliance casings, furniture components, and other deeply stamped or pressed parts. With its combination of reliable mechanical properties, ease of fabrication, and affordability, pickled SPHD is a practical choice for applications requiring consistent performance and high shape complexity.

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Specification Parameters

Parameters of Pickled SPHD Steel
Parameter Category	Specific Parameter	Typical Value / Description	Importance / Effect
Base Metal Standard	JIS Grade	SPHD (Cold-rolled Drawing Quality)	Defines the final target grade. The pickled hot-band is produced to meet the chemical requirements for this standard.
Chemical Composition	Carbon (C)	Low: 0.06% - 0.10%	Low carbon provides good softness and formability, though slightly higher than SPHE.
	Manganese (Mn)	0.30% - 0.50%	Slightly higher than SPHE to contribute to strength.
	Phosphorus (P)	≤ 0.035%	An impurity; kept low to prevent embrittlement.
	Sulfur (S)	≤ 0.035%	An impurity; kept low to prevent forming MnS inclusions which harm formability.
	Aluminum (Al)	0.02% - 0.07%	Used as a killing agent to deoxidize the steel, resulting in an "Aluminum-Killed" (AK) steel for better formability.
Mechanical Properties (Hot-Rolled Pickled State)	Yield Strength (YS)	Moderate (e.g., 280 - 350 MPa)	Must be soft enough for cold-rolling but may be slightly stronger than SPHE hot-band.
	Tensile Strength (TS)	Moderate (e.g., 390 - 480 MPa)	Indicates the base metal is in a formable state before cold reduction.
	Elongation	Good (> 28%)	Necessary to withstand the deformation of the cold-rolling process.
Surface & Dimensional	Surface Quality	Clean, scale-free, uniform matte finish.	The purpose of pickling. Removes mill scale to ensure a good surface after cold rolling.
Surface & Dimensional	Thickness (Hot-Rolled Pickled)	1.5mm - 4.0mm (common range)	This is the starting thickness that will be cold-reduced to a final, thinner gauge.
Key Characteristics	Formability (Potential)	Good / Drawing Quality	The chemical composition is tailored so that after cold rolling and annealing, the final product will have good ductility for forming operations like drawing, stretching, and bending. It is less formable than SPHE.
Key Characteristics	Non-Aging	Stable mechanical properties over time.	The low carbon content helps prevent the gradual increase in strength and loss of ductility that can occur over time.