Frequently Asked Questions
The following questions reflect the most common technical concerns from stamping and automotive-related manufacturers. These customers typically focus on surface cleanliness, oil coating control, and forming behavior, as these factors directly affect painting adhesion and automated production stability.
What is the main difference between HRC and HRPO?
HRPO is hot rolled steel that has undergone pickling to remove mill scale and then lightly oiled to prevent corrosion. The base mechanical properties remain similar, but the surface is cleaner and more suitable for forming or painting.
Is the oil layer permanent?
No. The oil coating is temporary and designed to prevent rust during storage and transportation. It can be removed before painting or further surface treatment.
Does pickling affect mechanical properties?
Pickling primarily removes surface scale and does not significantly change mechanical properties of the base steel.
Is HRPO suitable for precision stamping?
Yes. The cleaner surface reduces die wear and improves forming consistency compared to untreated HRC.
HRPO is hot rolled steel that has undergone pickling to remove mill scale and then lightly oiled to prevent corrosion. The base mechanical properties remain similar, but the surface is cleaner and more suitable for forming or painting.
No. The oil coating is temporary and designed to prevent rust during storage and transportation. It can be removed before painting or further surface treatment.
Pickling primarily removes surface scale and does not significantly change mechanical properties of the base steel.
Yes. The cleaner surface reduces die wear and improves forming consistency compared to untreated HRC.
Related Glossaries
An acid treatment that removes mill scale and surface oxides from hot rolled steel. It improves surface cleanliness and prepares the material for further processing.
A thin layer of protective oil applied after pickling. It reduces the risk of surface oxidation during storage and transportation.
The production line where hot rolled steel passes through controlled acid tanks for scale removal.
An acid treatment that removes mill scale and surface oxides from hot rolled steel. It improves surface cleanliness and prepares the material for further processing.
A thin layer of protective oil applied after pickling. It reduces the risk of surface oxidation during storage and transportation.
The production line where hot rolled steel passes through controlled acid tanks for scale removal.
Available Services
Precision slitting
Before feeding narrow strips into stamping lines, Ensures width accuracy and controlled edge quality
Cut-to-length processing
For sheet-based fabrication or laser cutting, Delivers flat sheets with accurate dimensions
Moisture-proof packaging
For sea freight or long transit routes, Prevents oxidation in humid shipping conditions.
