20 Ga алюминизированная сталь
20 Ga aluminized steel is a versatile specification widely used across automotive, HVAC, and heating equipment industries. With a nominal thickness of 0.91 мм, standard widths up to 1524 мм, and flexible sheet or coil formats, обеспечивает отличную коррозионную стойкость, формуемость, and heat durability.
- Описание
Описание
20 gauge aluminized steel refers to aluminized steel sheet with a nominal thickness of 20 измерять, обычно используется в автомобилестроении, HVAC, отопительные приборы, and industrial fabrication. The sheet is coated with an aluminum or aluminum–silicon alloy layer to improve corrosion resistance, Отражающая способность тепла, and oxidation performance.
20 gauge is one of the most widely used thicknesses because it offers a strong balance between сила, workability, and heat resistance.
20 Gauge Thickness and Metric Conversion
In aluminized steel, 20 Ga corresponds to the following typical thickness:
| Измерять (Ga) | Inch (в) | Millimeter (мм) |
|---|---|---|
| 20 Ga | 0.0359 в | 0.91 мм |
Thickness may vary slightly based on manufacturing tolerance.
Common Width Options for 20 Ga алюминизированная сталь
Aluminized steel sheet is available in several standard widths to support different processing needs:
24 в (610 мм)
36 в (914 мм)
40 в (1016 мм)
48 в (1219 мм)
60 в (1524 мм)
Custom widths can also be offered depending on coil processing capability.
Standard Lengths (Sheets) or Coil Supply
20 Ga aluminized steel is commonly supplied as:
1. Sheets
Typical cut-to-length sizes include:
48″ × 96″ (1219 × 2438 мм)
48″ × 120″ (1219 × 3048 мм)
36″ × 96″ (914 × 2438 мм)
36″ × 120″ (914 × 3048 мм)
Custom lengths available up to 6000 мм depending on processing lines
2. Катушки
Inner diameter (ИДЕНТИФИКАТОР): 508 mm or 610 мм
Coil weight: Based on thickness and width; can be light or full-width coils
Aluminized Steel Types Available in 20 Измерять
20 Ga aluminized steel is typically produced in two types:
| Тип | Покрытие | Ключевые особенности |
|---|---|---|
| Тип 1 (Al-Si coating) | Aluminum–Silicon alloy (approx. 5–11% Si) | Higher heat resistance, excellent oxidation resistance |
| Тип 2 (Pure Al coating) | Nearly pure aluminum | Superior atmospheric corrosion resistance |
Both types are widely used depending on whether теплостойкость или коррозионная стойкость is the main priority.
Coating Weight Options for 20 Ga алюминизированная сталь
Typical coating weight ranges:
| Coating Designation | Total Aluminum Coating (Both Sides) | Application Notes |
|---|---|---|
| Т1-40 | ~120 g/m² | Automotive exhaust, обогреватели |
| Т1-25 | ~75 g/m² | HVAC, воздуховоды, бытовая техника |
| T2-40 | ~120 g/m² | Outdoor structures, дымоходы |
| T2-25 | ~75 g/m² | General atmospheric protection |
Available coating weights depend on region and production standards.
Dimensional Tolerances for 20 Gauge Aluminized Steel
Typical tolerances (may vary by mill standard):
Thickness tolerance: ±0.04–0.06 mm
Width tolerance: ±2–3 mm
Flatness tolerance: Depends on sheet width and length
Coating weight tolerance: As per ASTM or EN standard requirements
These tolerances ensure stability during forming, штамповка, изгиб, и сварка.
Common Applications of 20 Ga алюминизированная сталь
Because of its balanced thickness, 20 gauge aluminized steel is widely used in:
Компоненты автомобильной выхлопной системы
Heat shields and thermal covers
Furnace and oven parts
HVAC ducting and ventilation systems
Fireplace and heating equipment
Water heaters and combustion chambers
Industrial fabrications and enclosures
It provides consistent performance under moderate to high temperatures.
