Hot-rolled 304 stainless steel coils (ASTM A240/A240M standard) are produced through a high-temperature rolling process, offering excellent corrosion resistance and processability. They are suitable for applications in construction, chemical engineering, food processing, and other fields.

Surface finishes: 2B (matte), BA (mirror), and No. 1 (industrial finish).
Thickness range: 1.0-50mm (common 1.0-10mm)
Thickness: 1.0-50mm (customizable)
Width: 800-1500mm (coil)
Standard: ASTM A240/AISI 304
Delivery condition: Hot-rolled (HR) or annealed

Applications
Architectural decoration: Curtain walls, elevator panels (requires 2B/BA finish)
Industrial equipment: Chemical containers and pipelines (requires acid corrosion resistance)
Food processing: Processing equipment (requires FDA compliance)

Hot-rolled stainless steel coils are made from stainless steel through a high-temperature rolling process. They are primarily categorized into the following types:
Material Classification
Main types include austenitic stainless steel (such as 304 and 316), ferritic stainless steel, martensitic stainless steel, and duplex stainless steel. 304 and 316 are currently the most popular grades, offering excellent corrosion resistance.
Thickness Range
Hot-rolled coils typically range in thickness from 3mm to 150mm and are primarily used in structural components, pressure vessels, and other applications.

A36 is an ASTM standard carbon steel grade. "Painted Zinc Coated" indicates a colored coating (such as PE, PVDF, etc.) applied to the zinc coating, providing both corrosion protection and decorative properties.

Zinc coating range: 30-275g/m² (common Z30-Z275)
Coating types: PE (polyester), PVDF (fluorocarbon), HDP (high-weather resistant), etc.

Thickness: 0.18-3.5mm (0.4-1.2mm is common in construction)
Width: 600-1500mm (customizable)
Coating hardness: 2H-3H (pencil hardness)
Weather resistance: 10-25 years (maximum for PVDF coating)

Applications
Construction: Metal roofs, siding (requires PVDF coating)
Industrial equipment: Containers, ventilation ducts (high-zinc coating Z275)
Home appliance manufacturing: Refrigerator panels, air conditioner casings (matte PPGI)

PPGI (Pre-Painted Galvanized Steel) is a pre-coated galvanized steel sheet. It achieves both corrosion protection and decorative properties by applying a colored coating (such as PE or PVDF) to a galvanized substrate.

Zinc coating range: 40-275g/m² (commonly Z40-Z275)
Coating types: PE (polyester), PVDF (fluorocarbon), HDP (high-performance thermal conductivity), etc.

Thickness: 0.12-5.0mm (0.4-1.2mm is common in construction)
Width: 600-1500mm (customizable)
Coating hardness: 2H-3H (pencil hardness)
Weather resistance: 10-25 years (maximum for PVDF coating)

Applications
Construction: Metal roofs and wall panels (requires PVDF coating)
Home appliance manufacturing: Refrigerator panels and air conditioner casings (matte PPGI)
Industrial equipment: Containers and ventilation ducts (high-zinc coating Z275)

Z275 indicates a zinc coating weight of 275g/m² (both sides combined). This high-zinc coating is suitable for highly corrosive environments or long-term outdoor use.
Substrate Types: DX51D/SGCC/S350GD
Primarily mild steel, S350GD is high-strength steel.
Thickness: 0.12-6.0mm
Commonly used in construction: 0.3-2.0mm
Coating Process: Hot-Dip Galvanizing (HDG)
Zero-sparkle finish available

Applications:
Construction: Metal roofs and siding (requires pre-painting)
Industrial Equipment: Chemical containers and cooling tower supports (high zinc coating for corrosion protection)
Home Appliance Manufacturing: Outdoor appliance housings (requires a zero-sparkle finish)

Galvanized Coil 304 typically refers to hot-dip galvanized steel coil on a 304 stainless steel base. It combines the corrosion resistance of stainless steel with the protective properties of a galvanized coating, making it suitable for use in highly corrosive environments. However, please note:

Standard differences: 304 stainless steel itself does not require galvanizing (its corrosion resistance is sufficient). In practice, it is often a composite process of 304 stainless steel + galvanizing, or a mislabeling of the galvanized base material.

Dx51D is a European standard (EN 10346) hot-dip galvanized steel coil. Its base material is low-carbon steel, resulting in a uniform zinc coating. It's suitable for applications in construction, home appliances, and automotive applications.

Zinc coating weight: 40-275g/m² (Z40-Z275). Z80-Z180 is commonly used in construction.
Thickness: 0.12-6.0mm, primarily cold-rolled.
Width: 600-1500mm, customizable.

Applications:
Building structures: Roofs and wall panels (Z120-Z180).
Home appliance manufacturing: Refrigerator and washing machine panels (zero-sparkle cold-rolled steel).
Automotive components: Chassis components (high-zinc hot-rolled steel).

Galvanized coil is a thin steel sheet coated with zinc via a hot-dip galvanizing process. It is primarily made of low-carbon steel. Depending on the process used, it can be categorized into standard galvanized coil and alloyed galvanized coil.
Standard galvanized coil uses hot-rolled or cold-rolled steel strip as its substrate. This type of sheet offers excellent corrosion resistance and a high surface finish, making it widely used in construction, home appliances, and automotive manufacturing.
Alloyed galvanized coil, which undergoes hot-dip galvanizing to further enhance coating adhesion and weldability, is commonly used in precision instrument manufacturing and transportation infrastructure.

SM490YA is a Japanese standard (JIS G3106) low-alloy, high-strength structural steel designed specifically for welded structures, offering high strength, high toughness, and excellent weldability.

Chemical Composition: Carbon (C) ≤ 0.20%, Manganese (Mn) ≤ 1.60%, Sulfur/Phosphorus (S/P) ≤ 0.035%

Mechanical Properties: Yield Strength ≥ 325 MPa, Tensile Strength 570-700 MPa, Elongation ≥ 21%

Hot-Rolled vs. Cold-Rolled Coil Comparison
Hot-Rolled Coil: Oxide Scale 1.5-25mm, Building Structures, Shipbuilding
Cold-Rolled Coil: Pickled/Galvanized 0.3-2.5mm, Automotive Parts, Machining

SPCC is the designation for cold-rolled carbon steel plate according to the Japanese JIS standard (JIS G 3141), corresponding to the Chinese grades Q195/Q215A.
Surface Condition: Smooth (Mill Finish), suitable for subsequent processing such as spraying and electroplating.
Thickness Range: 0.12-3.0mm (common specifications: 0.3-2.5mm)

Chemical Composition:
Carbon (C) ≤ 0.12%, Manganese (Mn) ≤ 0.50%, Phosphorus/Sulfur (P/S) ≤ 0.035%

Mechanical Properties:
Tensile Strength 270-410 MPa, Elongation ≥ 28%

Production Process and Advantages
Process Flow: Hot-rolled coil → Pickling → Cold-rolled → Annealing → Tempering → Finishing
Core Advantages:
Smooth surface, high dimensional accuracy (tolerance ±0.03mm)
Excellent processability, suitable for forming processes such as stamping and bending

SPCC Cold-Rolled Coil Smooth surface, no oxide scale
Hot-rolled plate: Rough surface, with oxide scale
Stainless steel: Corrosion-resistant surface, high cost

S235JR is a non-alloy structural steel specified in the European standard (EN 10025-2) and falls under the category of carbon steel. It is available in hot-rolled and cold-rolled coils.

Standards and Classifications:
S235JR complies with EN 10025-2, where "S" stands for structural steel, "235" indicates a minimum yield strength of 235 MPa, and "JR" indicates an impact energy of ≥ 27 J at room temperature (20°C).

Hot-rolled: The surface is black steel, typically ≥ 1.0 mm thick, and is suitable for structural components such as buildings and bridges.

Cold-rolled: Rolled: Smooth surface, 0.2-2.5mm thickness, primarily used in precision machining applications such as automotive and home appliance manufacturing.

Chemical Composition: Carbon (C) ≤ 0.17%, Manganese (Mn) ≤ 1.40%, Phosphorus (P) ≤ 0.045%, Sulfur (S) ≤ 0.045%

Q195 carbon steel coil is a low-carbon steel material widely used in construction, machinery manufacturing, automotive parts, and other fields.

Chemical Composition: Carbon ≤ 0.12%, Manganese 0.25-0.50%, Silicon ≤ 0.30%, Phosphorus/Sulfur ≤ 0.035%
Mechanical Properties: Tensile Strength 315-430 MPa, Yield Strength 195 MPa, Elongation ≥ 32%
Processability: Good ductility, suitable for cold rolling, stamping, bending, and other processes

Hot-rolled coil: Surface oxide scale, thickness 1.5-25 mm, used in building structures and mechanical parts
Cold-rolled coil: Smooth surface, thickness 0.2-2.5 mm, used in home appliances, sheet metal, and hardware

Basic Characteristics of ST37 Steel Coil
Standards and Classifications:
ST37 is a non-alloy structural steel that complies with DIN 17100. "St" stands for structural steel, and "37" indicates a minimum tensile strength of 370 MPa.

Hot-rolled: The surface is scaled and requires pickling or sandblasting. Thickness ranges from 3-16 mm, making it suitable for building structures, mechanical parts, and other applications. Tensile strength 340-510 MPa.

Cold-rolled: Smooth and ready for painting. Thickness ranges from 0.1-2.0 mm, primarily used in precision machining applications such as automotive and home appliances. Tensile strength is slightly higher (due to cold work hardening).

Chemical Composition: Carbon (C) ≤ 0.17%, Manganese (Mn) ≤ 1.40%, Phosphorus (S) ≤ 0.035%, Sulfur (P) ≤ 0.035%

The following is information about Q235B Carbon Steel Coil.
Grade: Q235B (China GB/T 700 standard), corresponding to European standard S235JR (EN 10025-2).
Chemical Composition:
C ≤ 0.20%, Mn ≤ 1.40%, P/S ≤ 0.045% (Grade B steel requirements).
Surface Treatment: Cold-rolled, typically pickled or oiled; galvanized (GI) coating is also possible.
Mechanical Properties
Parameters: Q235B
Yield Strength (MPa) ≥ 235
Tensile Strength (MPa) 375-510
Elongation (%) ≥ 26 (thickness ≤ 16mm)
Impact Energy (20°C) ≥ 27 J
Production Process and Specifications
Cold Rolling: Thickness 0.3-6.0mm, Width 600-1500mm, coil weight 3-10 tons (standard coil ID 508/610mm)
Surface finish: Cold-rolled, smooth surface (SPCC grade), pickling or oiling available upon request

Carbon steel coils are rolled materials made from carbon steel. They are primarily categorized by material: carbon structural steel and alloy steel, with carbon structural steel being the most widely used.
Material Classification
Carbon structural steel: For example, the Q235 series has a carbon content of 0.12%-0.20% and a manganese content of 0.30%-0.70%, meeting standards for structural steel.
Alloy steel: Carbon steel is enhanced with the addition of other elements (such as manganese and silicon) to enhance its performance.
Production Process
It is produced using a hot rolling process, where the steel billet is heated to 1200-1300°C, then continuously rolled through a rolling mill, and finally coiled into shape.
Applications
It is primarily used in building steel structures, bridge frames, automotive manufacturing (for lightweight frames and bodies), and mechanical parts processing, with applications gradually expanding to wind turbine equipment manufacturing.