What Are the Advantages of hot rolled pickled coil？

What is Hot Rolled Pickled & Oiled Steel?

Hot Rolled Pickled and Oiled steel (HRPO) has been processed and descaled to remove surface impurities.

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Hot Rolled Pickled and Oiled steel sheets, and coils have improved workability and ductility, creating cost-saving opportunities for downstream processing like bending, forming, welding, laser cutting, and painting.

Alliance Steel's extensive inventory of Hot Rolled Pickled and Oiled steel sheets and coils has been descaled and oiled to extend longevity in corrosive environments. Request a quote today!

Why Hot Rolled Pickled and Oiled Steel?

• The combination of workability, surface finish/corrosion resistance, better painting, improved welding, improved fabrication(bending, forming stamping, laser cutting) are some of the main advantages that hot rolled pickled and oiled (HRPO) steel has to offer.
• To aid in corrosion resistance, Hot Rolled steel is first pickled to remove scale and impurities from its surface, and lastly, the newly pickled steel is oiled to prevent rust and oxidation.
• The end effect is a smoother surface that enhances the material's formability and weldability, making it ideal for use in the manufacturing of machinery, automobiles, and buildings. HRPO steel is a popular option for projects requiring strong, long-lasting steel products, as it offers an affordable alternative with enhanced aesthetics and is suitable for additional processing or painting.

The Pickling and Oiling Procedure

Pickling is used to clean hot rolled steel by removing impurities like rust, scale, and surface discoloration.

The steel is immersed in a solution typically composed of strong mineral acids such as sulfuric or hydrochloric acid to dissolve surface oxides and contaminants.

In addition to cleaning the steel, the pickling process enhances the steel's surface quality, making it more suitable for use in future manufacturing procedures. 

Following pickling, a thin layer of oil is applied to the steel surface to prevent corrosion.

This oiling process forms a protective barrier that shields the material from moisture and other environmental elements.

Challenges with Blasting

During the blasting process, abrasive particles are propelled against the steel’s surface, producing a number of tiny holes or craters. A laser’s ability to focus during cutting may be negatively impacted by this uneven surface texture, resulting in a lower-quality cut. Furthermore, blasting frequently produces an uneven texture that results in a duller paint finish, which might not satisfy the practical and aesthetic requirements of high-quality construction.

Advantages of Pickling

Pickling hot rolled steel, on the other hand, efficiently eliminates flaky scale, leaving the entire sheet or coil with a uniformly smooth surface. 

It is ideal for painting and enamel applications due to its consistency, which is crucial for achieving a high-quality finish. 

Pickled Steel products have a clean, flat surface, which also makes other fabrication procedures easier. For example, welding HRPO (Hot Rolled Pickled and Oiled) steel is safer and more effective, as fewer surface impurities may compromise weld integrity. The smooth surface also enhances metal forming and bending operations by reducing tool wear and enabling more precise, consistent results.

HRPO Plate Benefits

• Advanced Fiber Laser Cutting
• Plasma Cutting Proficiency
• Improved Welding Quality
• Fewer Materials Used in Process

Applications for Hot Rolled Pickled & Oiled Steel Products

• Agriculture Equipment
• Automotive
• Construction
• Lawn and Garden Equipment
• Rack Systems
• Strapping
• Tubing
• Various Stampings

ASTM A Hot Rolled Pickled Steel

ASTM is the standard specification for Sheet, Hot Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with improved formability, and ultra-high-strength steel. It is ideal when some surface imperfections are not an issue and is ideal for forming and welding. Heat treatment can affect the properties of the steel.

Alliance Steel stocks ASTM A Hot Rolled Pickled Steel in:

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• Commercial Steel (CS) & Drawing Steel (DS) Types A and B
• Structural Steel (SS): Grades 30-55
• HSLA (High Strength Low Alloys)
• UHSS (Ultra-High-Strength Steel): Grades 40 - 100

ASTM A Hot Rolled Pickled Steel

The A specification is the standard specification for heavy gauge Hot Rolled Sheet Carbon (CS), Structural (SS), High-Strength Low-Alloy (HSLAS), and High-Strength Low-Alloy with improved formability.

(HSLAS-F) and Ultra-High Strength (UHSS) steels in thicknesses over 0.230". ASTM A is ideal when some surface imperfections are not an issue. ASTM is ideal for forming and welding. Heat treatment can affect the properties of the steel.

Alliance Steel stocks ASTM A Hot Rolled Pickled Steel in:

• Commercial Steel (CS) & Drawing Steel (DS) Types A and B
• Structural Steel (SS): Grades 30-45
• HSLA (High Strength Low Alloys)
• UHSS (Ultra-High-Strength Steel): Grades 40-100

ASTM A36 Hot Rolled Pickled Steel

ASTM A36 Steel Plate is one of the most common grades of steel used in structural applications. The ASTM A36 standard covers low-carbon steels commonly used in construction, manufacturing, and other industries. It is considerably soft for easy forming, machining, and welding. Heat treatment has less effect on ASTM A36 steel material.

HRPO Steel Sheet & Coil Capabilities

Hot Rolled Pickled and Oiled steel sheets and coils are often used as an alternative to cold rolled steel due to a decreased cost. HRPO is well suited for many applications and offers improved workability and availability.

Alliance Steel strives to provide unparalleled service to customers throughout the country. From Fortune 500 companies to emerging startups, we have the inventory and capabilities to deliver the quality flat roll products you need on time and at a competitive price.

Alliance Steel Stretcher - Leveling Capabilities: Material Thickness:  .040" - .375" Max Coil:  80,000 lbs ID:   23” - 27” Entry Width: 75" Length: 400" Width/Length Tolerance:  +/-.010" Max Skid:  10,000 lbs Alliance Steel Slitting Capabilities: Material Thickness: .010"-.500" Min/Max Slit Width: .375”-84” Min/Max ID: 20”-30” Max OD: 84" Slit Width Tolerance: +/-.005"

Contact Alliance Steel for information on Hot Rolled steel products and availability.

Pickled & Oiled Steel Grades & Properties

Structural Grades C Mn P S Al Si Cu Ni Cr Mo V Cb Ti N 30,33,36,40 0.25 0.9 0.035 0.04 0.2 0.2 0.15 0.06 0.008 0.008 0.025 36T2,45-80 0.25 1.35 0.035 0.04 0.2 0.2 0.15 0.06 0.008 0.008 0.025 45T2 .02- 0.08 .30- 1.0 .03- .07 0.025 .02- .08 0.6 0.2 0.2 0.15 0.06 0.008 0.008 0.025 .01- .03 HSLA Grades C Mn P S Al Si Cu Ni Cr Mo V Cb Ti N 45C1 0.22 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005 45C2 0.15 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005 50C1 0.23 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005 50C2 & 55C2 0.15 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005 55C1 0.25 1.35 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005 60C1 & 65C1 0.26 1.5 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005 60C2 & 65C2 0.15 1.5 0.04 0.04 0.2 0.2 0.15 0.06 0.005 0.005 0.005 70C1 0.26 1.65 0.04 0.04 0.2 0.2 0.15 0.16 0.005 0.005 0.005 70C2 0.15 1.65 0.04 0.04 0.2 0.2 0.15 0.16 0.005 0.005 0.005

Transformation is the basic necessity of today's era, with constant increase in competitiveness there is an enormous amount of product and services prevailing in the market.  Most companies believe in economies of scale for standard products while others always challenge themselves to think differently and become innovators by successfully delivering a superior / niche product in a different market. Manufacturer’s with such dynamic vision have one thing in common: raw material HRPO.

HRPO-Hot Rolled Pickled and Oiled Coil is an input raw material which helps the manufacturer to consider it as a good option over Hot Rolled Coils and Cold Rolled Coils. HRPO has great potential to be used for manufacturing of galvanized steel pipes due to its salient features.

If we want to understand what exactly caused the manufacturers to shift from CRC to HRC and eventually HRPO, then we will have to understand how it started. Initially when Cold Rolled Coils were used for manufacturing pipes, CRC was the only material available below 2mm thickness, and HRC was only available above 2mm thickness hence manufacturers had no option other than using CRC for pipe manufacturing. Later after several years of developments HRC was now available in thickness 1.2mm to 2mm, hence in order to inculcate huge savings like USD $50 - $55 per metric ton, manufacturers shifted from CRC to HRC. With constant developments and advancements there was a new improvised product in the market know as HRPO, it was the same HRC with further treatment of Pickling and Oiling to provide additional benefits and quickly caught the attention of approximately 70% of the manufacturers, as it was easily adaptable and mostly suited for various applications.

HRPO had better surface quality as compared to HRC as during the manufacturing process the surface scales of Iron Oxides are removed in order to match the product finish. HRPO material is also known for better weldability, which avoids weld failures over the line and majorly saves rework cost and scrap . HRPO also reduces the possibility of unevenness due to its own manufacturing process and superior quality. As such it suits best for most purposes by providing extra strength and the material also reacts positively with galvanizing. The zinc coating provides excellent surface finish and enhances the appearance of the final product, resulting in increased shelf life and improved corrosion resistance properties.

The cost difference between HRPO and HRC is considerable around USD $15 - $20 per metric ton but is outweighed by the quality and added value to the end product and helps in lowering the  cost due to less complex manufacturing requirements and ease of operations. 

A better-quality product provides better opportunities to market and helps the manufacturer to be the chooser while entering new product segments and industries. With this mindset, utilizing HRPO as their new input raw material should provide less headaches, more customer satisfaction and a more competitive edge to your company.

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