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Hot rolled sheet
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Description
Hot-Rolled Steel Sheet is a flat rolled metal product manufactured by hot rolling at temperatures above the steel recrystallization point. Widely used in various industries due to universal properties and affordable cost.
Production Technology
The manufacturing process includes the following stages:
1. Slab Heating: Steel billets (slabs) are heated in continuous furnaces to a temperature of 1100-1300°C.
2. Roughing Rolling: Reduction on a roughing mill to obtain an intermediate product (transfer bar).
3. Finishing Rolling: Rolling through stands of a finishing group to the required thickness.
4. Cooling: Controlled cooling on cooling lines.
5. Straightening: Eliminating deformations on straightening machines.
6. Cutting: Cutting into sheets of required sizes.
7. Quality Control: Checking geometry, mechanical properties, and surface.
Characteristics and Assortment
• Sheet Thickness: from 0.5 to 160 mm.
• Width: from 1000 to 3500 mm.
• Length: from 2000 to 14000 mm.
• Steel Grades: St3sp, 09G2S, 345, 45, 40Kh and others.
• Accuracy Classes:
o By thickness: normal (A), increased (P).
o By flatness: normal (PN), improved (PU), high (PV).
• Supply Options: coils and individual sheets.
Advantages
• High Strength and rigidity.
• Versatile Application in various industries.
• Good Weldability and workability.
• Affordable Production Cost.
• Wide Range of sizes and steel grades.
• Possibility of further processing and conversion.
Areas of Application
• Construction: elements of metal structures, floors.
• Mechanical Engineering: equipment housings, frames, platforms.
• Shipbuilding: ship hull structures.
• Automotive Industry: frames, body elements.
• Pipe Production: manufacturing of large-diameter welded pipes.
• Oil & Gas Industry: tanks, vessels, structures.
Normative Documentation (GOST Standards)
Main standards regulating the production of hot-rolled sheets:
GOST 19903-2015 – "Hot-rolled steel sheet. Assortment"
• Defines the assortment of hot-rolled sheets.
• Establishes limit deviations for dimensions.
• Regulates requirements for mass and geometry.
GOST 14637-89 – "Thick plate of ordinary quality carbon steel"
• Establishes technical requirements for thick plate.
• Defines mechanical properties.
• Regulates test methods.
GOST 16523-97 – "Thin sheet of quality and ordinary quality carbon steel"
• Defines requirements for thin sheet.
• Establishes surface quality categories.
• Regulates acceptance rules.
Additional Normative Documents:
• GOST 535-2005 – Rolled steel products, long and shaped, made of ordinary quality carbon steel.
• GOST 19281-2014 – Rolled products made of high-strength steel.
• GOST 5520-79 – Steel sheet made of carbon, low-alloy and alloy steels.
Quality Requirements:
• Surface: absence of cracks, cavities, laps.
• Geometry: adherence to flatness and straightness.
• Mechanical Properties: compliance with standard requirements.
• Internal Structure: absence of delaminations and non-metallic inclusions.
Hot-Rolled Steel Sheet is a flat rolled metal product manufactured by hot rolling at temperatures above the steel recrystallization point. Widely used in various industries due to universal properties and affordable cost.
Production Technology
The manufacturing process includes the following stages:
1. Slab Heating: Steel billets (slabs) are heated in continuous furnaces to a temperature of 1100-1300°C.
2. Roughing Rolling: Reduction on a roughing mill to obtain an intermediate product (transfer bar).
3. Finishing Rolling: Rolling through stands of a finishing group to the required thickness.
4. Cooling: Controlled cooling on cooling lines.
5. Straightening: Eliminating deformations on straightening machines.
6. Cutting: Cutting into sheets of required sizes.
7. Quality Control: Checking geometry, mechanical properties, and surface.
Characteristics and Assortment
• Sheet Thickness: from 0.5 to 160 mm.
• Width: from 1000 to 3500 mm.
• Length: from 2000 to 14000 mm.
• Steel Grades: St3sp, 09G2S, 345, 45, 40Kh and others.
• Accuracy Classes:
o By thickness: normal (A), increased (P).
o By flatness: normal (PN), improved (PU), high (PV).
• Supply Options: coils and individual sheets.
Advantages
• High Strength and rigidity.
• Versatile Application in various industries.
• Good Weldability and workability.
• Affordable Production Cost.
• Wide Range of sizes and steel grades.
• Possibility of further processing and conversion.
Areas of Application
• Construction: elements of metal structures, floors.
• Mechanical Engineering: equipment housings, frames, platforms.
• Shipbuilding: ship hull structures.
• Automotive Industry: frames, body elements.
• Pipe Production: manufacturing of large-diameter welded pipes.
• Oil & Gas Industry: tanks, vessels, structures.
Normative Documentation (GOST Standards)
Main standards regulating the production of hot-rolled sheets:
GOST 19903-2015 – "Hot-rolled steel sheet. Assortment"
• Defines the assortment of hot-rolled sheets.
• Establishes limit deviations for dimensions.
• Regulates requirements for mass and geometry.
GOST 14637-89 – "Thick plate of ordinary quality carbon steel"
• Establishes technical requirements for thick plate.
• Defines mechanical properties.
• Regulates test methods.
GOST 16523-97 – "Thin sheet of quality and ordinary quality carbon steel"
• Defines requirements for thin sheet.
• Establishes surface quality categories.
• Regulates acceptance rules.
Additional Normative Documents:
• GOST 535-2005 – Rolled steel products, long and shaped, made of ordinary quality carbon steel.
• GOST 19281-2014 – Rolled products made of high-strength steel.
• GOST 5520-79 – Steel sheet made of carbon, low-alloy and alloy steels.
Quality Requirements:
• Surface: absence of cracks, cavities, laps.
• Geometry: adherence to flatness and straightness.
• Mechanical Properties: compliance with standard requirements.
• Internal Structure: absence of delaminations and non-metallic inclusions.
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